mmiranda Nvidia style guide changes to gstreamer video recording readme #1327
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Greptile SummaryThis PR comprehensively rewrites the GStreamer Video Recorder README to align with NVIDIA style guide standards. The documentation has been transformed from a basic reference into a well-structured, professional guide with clear navigation, detailed options tables, practical examples, and improved architecture explanations. Key Improvements:
Style Choices:
The changes are purely documentation improvements with no code modifications. All technical information remains accurate and the examples are valid. Confidence Score: 5/5
Important Files Changed
Sequence DiagramsequenceDiagram
participant User
participant Holohub
participant Container
participant App as gst_video_recorder
participant Source as Video Source<br/>(V4L2/Pattern)
participant Recorder as GstVideoRecorderOp
participant GStreamer
participant File as Output File
User->>Holohub: ./holohub run gst_video_recorder
Holohub->>Container: Build & start container
Container->>App: Launch application
alt V4L2 Camera Source
App->>Source: Initialize V4L2VideoCaptureOp
Source->>Source: Capture from camera
Source->>Recorder: Send frames via FormatConverterOp
else Pattern Generator Source
App->>Source: Initialize PatternGenOperator
Source->>Source: Generate test patterns
Source->>Recorder: Send frames directly
end
Recorder->>GStreamer: Configure pipeline<br/>(converter ! encoder ! parser ! muxer)
loop For each frame
Source->>Recorder: Frame data (host/device memory)
Recorder->>GStreamer: Push frame to pipeline
GStreamer->>GStreamer: Encode frame
GStreamer->>File: Write encoded data
end
Recorder->>GStreamer: Send EOS signal
GStreamer->>File: Finalize file
App->>User: Recording complete
|
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughRewrites the Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes 🚥 Pre-merge checks | ✅ 2✅ Passed checks (2 passed)
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📚 Learning: 2025-10-22T16:21:10.281ZApplied to files:
📚 Learning: 2025-10-22T16:33:55.411ZApplied to files:
🪛 LanguageToolapplications/gstreamer/gst_video_recorder/README.md[style] ~125-~125: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym. (ENGLISH_WORD_REPEAT_BEGINNING_RULE) ⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
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Actionable comments posted: 5
🤖 Fix all issues with AI Agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Line 17: The README currently jumps heading levels: change any extra top-level
headings so there is only one H1 and increment headings one level at a time —
specifically convert the standalone "Installation Guide" (currently `#
Installation Guide`) to `## Installation Guide`, and promote `### Supported
Video Sources` and the other `###` headings that should be H2 to `## Supported
Video Sources` (and similarly change any `###` that belong directly under the
main topic to `##`), ensuring no H3 appears immediately after H1 without an
intervening H2 so the hierarchy is H1 → H2 → H3 throughout.
- Line 198: Update the README phrase "High quality recording with custom encoder
settings:" to use a hyphenated compound adjective: change it to "High-quality
recording with custom encoder settings:" in the README.md (look for the exact
line starting with "* High quality recording" and replace it).
- Line 79: The markdown code span containing ``` ./holohub build
gst_video_recorder``` has an extra leading space inside the backticks; edit the
README to remove the leading space so the span reads ```./holohub build
gst_video_recorder``` (keep the double spaces between words if intended)
ensuring the table cell now contains the corrected inline code delimiter without
the extra whitespace.
- Around line 49-52: The Quick Start markdown table has two separator rows
causing a malformed table; edit the table in the README by removing the extra
"|--|--|" separator so there is only one separator row between the header
("Using the V4L2 Camera | Generating Test Patterns") and the single content row
containing the commands ("./holohub run gst_video_recorder v4l2" and
"./holohub run gst_video_recorder pattern"), ensuring the table header, one
separator row, and one content row remain.
- Around line 89-93: The table of contents references nonexistent sections
"Encoder Properties", "Output Formats", and "Supported Encoders"; either remove
those three links from the TOC list or create matching sections titled "Encoder
Properties", "Output Formats", and "Supported Encoders" with brief explanatory
content; update the TOC entries to match exact heading text if you add sections,
or simply delete the three list items from the TOC so all links point to
existing headings like "Running the Application" and "Command-Line Options".
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
134-134: Improve table cell wording to avoid repetitive "For" beginnings.The description uses "For..." twice in succession, which makes it awkward. Restructure to improve clarity and readability.
🔎 Suggested revision
- | `-w, --width <pixels>` | Frame width. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1920` | + | `-w, --width <pixels>` | Frame width. V4L2 must match a supported camera resolution; pattern accepts any reasonable resolution (64-8192 pixels) | `1920` |
📜 Review details
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~134-~134: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
[grammar] ~198-~198: Use a hyphen to join words.
Context: ... 300 -o camera_yuyv.mp4" ``` * High quality recording with custom encoder se...
(QB_NEW_EN_HYPHEN)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
17-17: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
79-79: Spaces inside code span elements
(MD038, no-space-in-code)
91-91: Link fragments should be valid
(MD051, link-fragments)
92-92: Link fragments should be valid
(MD051, link-fragments)
93-93: Link fragments should be valid
(MD051, link-fragments)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: Greptile Review
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: Bruce Hashemian <[email protected]>
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Actionable comments posted: 1
🤖 Fix all issues with AI Agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Line 17: The README has invalid heading hierarchy: keep the top-level "#
GStreamer Video Recorder" as-is, change "### Supported Video Sources" to "##
Supported Video Sources", change the "### Requirements" heading at line 22 to
"## Requirements", and change the stray "# Installation Guide" to "##
Installation Guide" so the document uses a single h1 and increments headings one
level at a time.
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
130-134: Rephrase to avoid successive sentences starting with the same word.The description for the
-h, --heightoption on lines 133–134 begins two successive thoughts with "For": "For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution...". Reword to improve readability and sentence variety.🔎 Suggested rephrase
- | `-h, --height <pixels>` | Frame height. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1080` | + | `-h, --height <pixels>` | Frame height in pixels. V4L2 requires a resolution supported by the camera; pattern generator accepts any reasonable value (64-8192 pixels) | `1080` |
📜 Review details
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (2)
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~133-~133: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
[grammar] ~197-~197: Use a hyphen to join words.
Context: ... 300 -o camera_yuyv.mp4" ``` * High quality recording with custom encoder se...
(QB_NEW_EN_HYPHEN)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
17-17: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
78-78: Spaces inside code span elements
(MD038, no-space-in-code)
90-90: Link fragments should be valid
(MD051, link-fragments)
91-91: Link fragments should be valid
(MD051, link-fragments)
92-92: Link fragments should be valid
(MD051, link-fragments)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: Greptile Review
bhashemian
changed the title
bhashemian
changed the title
bhashemian
changed the title
…eferences and also adjusting some heading levels that I didn't have right Signed-off-by: meg miranda <[email protected]>
Signed-off-by: meg miranda <[email protected]>
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: megnvidia <[email protected]>
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Actionable comments posted: 0
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
194-194: Use hyphen in compound adjective "high-quality."Compound adjectives preceding a noun should be hyphenated. Change "High quality recording" to "High-quality recording."
🔎 Proposed fix
- * High quality recording with custom encoder settings: + * High-quality recording with custom encoder settings:
📜 Review details
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~130-~130: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
[grammar] ~194-~194: Use a hyphen to join words.
Context: ... 300 -o camera_yuyv.mp4" ``` * High quality recording with custom encoder se...
(QB_NEW_EN_HYPHEN)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
17-17: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
78-78: Spaces inside code span elements
(MD038, no-space-in-code)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Greptile Review
- GitHub Check: check-metadata
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hoping this solves some of the merge conflicts I was having
…roblems that the AI review found Merge branch 'mmiranda-gstream-readme-edits' of github.com:nvidia-holoscan/holohub into mmiranda-gstream-readme-edits
Signed-off-by: meg miranda <[email protected]>
|
oy. I love git. I hate git. Thankfully I don't think it is a toxic relationship and I will swiftly get over my hate. |
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: megnvidia <[email protected]>
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Actionable comments posted: 0
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
173-225: Improve indentation consistency across usage examples.Lines 191–193 and 196–198 use 4-space indentation, while lines 176–178 and 204–205 use 2-space indentation. Standardize on 2-space indentation for markdown list continuations to maintain consistency throughout.
🔎 Proposed fix for indentation consistency
* Record with specific pixel format (YUYV): - ```bash - ./holohub run gst_video_recorder --run-args="--source v4l2 --width 640 --height 480 --pixel-format YUYV --count 300 -o camera_yuyv.mp4" - ``` + ```bash + ./holohub run gst_video_recorder --run-args="--source v4l2 --width 640 --height 480 --pixel-format YUYV --count 300 -o camera_yuyv.mp4" + ``` * High-quality recording with custom encoder settings: - ```bash - ./holohub run gst_video_recorder --run-args="--source v4l2 --property bitrate=12000 --property preset=1 --count 900 -o high_quality.mp4" - ``` + ```bash + ./holohub run gst_video_recorder --run-args="--source v4l2 --property bitrate=12000 --property preset=1 --count 900 -o high_quality.mp4" + ```Apply the same 2-space indentation fix to all remaining examples in the Pattern Generator Examples section (lines 202–225).
📜 Review details
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~131-~131: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
17-17: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
77-77: Spaces inside code span elements
(MD038, no-space-in-code)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Greptile Review
- GitHub Check: build-and-deploy
🔇 Additional comments (7)
applications/gstreamer/gst_video_recorder/README.md (7)
35-41: Table of contents links correctly reference existing sections.All navigation links now point to properly defined headings. Previous issues with broken links to non-existent sections have been resolved.
44-50: Quick Start section is clear and concise.The two-command comparison table is easy to scan. The duplicate separator row has been removed.
74-79: Installation comparison table is well-structured.The side-by-side comparison of containerized vs. local builds is informative and easy to follow.
114-145: Command-line reference tables are comprehensive and well-organized.The segmented approach (General, Resolution, V4L2, Pattern) makes options easy to find.
195-195: Approved: "High-quality" compound adjective is now correctly hyphenated.This grammatical fix from the previous review has been successfully applied.
Also applies to: 198-198
228-268: Architecture and pipeline descriptions are accurate and well-formatted.Pipeline diagrams and component descriptions clearly explain the two execution paths (V4L2 and Pattern Generator). Example pipelines with specific encoder/format combinations are helpful.
276-300: Notes section provides valuable implementation details.The separation of video sources, recording behavior, and output location guidance is clear. The note about output file paths and
--countbehavior is practical.
|
Ok I have commented on the AI review items. I haven't resolved the comments in the hopes that it makes my explanation and reasoning behind changes more clear. I should also add that I promise I didn't delete pertinent information, but I did move many things around. I admit, the file diff is a bit concerning. I am willing to recreate the changes in smaller increments if anyone would like that. |
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Greptile Overview
Greptile Summary
This PR successfully reorganizes the GStreamer Video Recorder README to follow NVIDIA Style Guide standards. The documentation has been restructured with clear sections, improved navigation, and better formatting consistency.
Major improvements:
- Removed "etc." usage per style guide requirements
- Converted command-line options from prose to clear reference tables
- Added navigation links for better user experience
- Reorganized content into logical flow: Quick Start → Installation → Usage → Testing → Examples → Architecture
- Enhanced code formatting with consistent use of backticks for inline code
- Added Tips section with practical advice
- Improved table formatting for build options comparison
Minor style issues found:
- Some example titles have inconsistent punctuation (semicolons vs colons)
- One numeric value written as word ("ten" instead of "10")
The changes are purely documentation improvements with no functional code changes.
Confidence Score: 4/5
- This PR is safe to merge with only minor style inconsistencies to address
- Score reflects excellent documentation reorganization with proper NVIDIA Style Guide adherence. Only minor formatting inconsistencies in example titles prevent a perfect score. No functional code changes means zero risk to application behavior.
- No files require special attention - only cosmetic style refinements suggested
Important Files Changed
File Analysis
| Filename | Score | Overview |
|---|---|---|
| applications/gstreamer/gst_video_recorder/README.md | 4/5 | Comprehensive documentation reorganization following NVIDIA Style Guide with improved structure, tables, and formatting. Minor style inconsistencies in example titles. |
Sequence Diagram
sequenceDiagram
participant User
participant README
participant StyleGuide as NVIDIA Style Guide
User->>README: Request documentation update
README->>StyleGuide: Apply formatting rules
StyleGuide->>README: Restructure sections
Note over README: Remove "etc." instances
Note over README: Add section headers (###)
Note over README: Convert options to tables
Note over README: Improve formatting consistency
StyleGuide->>README: Add navigation links
StyleGuide->>README: Reorganize content flow
README->>User: Deliver improved documentation
Note over README: Quick Start → Installation → Usage → Testing → Examples → Architecture
bhashemian
changed the title
Signed-off-by: B Hashemian <[email protected]>
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Line 16: The document uses h3 headings for top-level sections (e.g., "###
Supported Video Sources") which breaks markdown hierarchy; update those
top-level section headings to h2 (change "###" to "##" for "Supported Video
Sources" and all other top-level sections), and ensure true subsections remain
h3 (###); apply this fix to the other occurrences noted (lines referenced in the
review) so every direct child of the main title uses "##" and nested subsections
use "###".
🧹 Nitpick comments (3)
applications/gstreamer/gst_video_recorder/README.md (3)
5-5: Remove the unnecessary</br>tag.The
</br>HTML tag after the image is not needed in Markdown. The line break is already handled by the blank line after it. Self-closing tags should use<br />format if required, but in this case, it's not necessary.♻️ Proposed fix
-</br> +
123-124: Consider rewording to avoid repetitive sentence structure.The table cells for width and height descriptions both begin consecutive sentences with "For V4L2:" and "For the pattern:" which creates repetition. Consider a more concise format.
♻️ Proposed alternative wording
-| `-w, --width <pixels>` | Frame width. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1920` | -| `-h, --height <pixels>` | Frame height. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1080` | +| `-w, --width <pixels>` | Frame width. V4L2 source requires a supported camera resolution; pattern source accepts any reasonable value (64-8192 pixels) | `1920` | +| `-h, --height <pixels>` | Frame height. V4L2 source requires a supported camera resolution; pattern source accepts any reasonable value (64-8192 pixels) | `1080` |
202-230: Standardize example section headers for consistency.The example headers in this section have inconsistent formatting:
- Some use semicolons (e.g., "Different Resolutions; Record 720p video")
- Some use "or" (e.g., "H.265 Encoding or how to record...")
- Some are simple descriptions (e.g., "Record color bars")
- Capitalization varies
Consider using a consistent format throughout, such as descriptive titles without semicolons.
♻️ Proposed consistent formatting
-- H.265 Encoding or how to record high-quality H.265 video: +- H.265 Encoding (high-quality recording): -- Different Resolutions; Record 720p video: +- Record at 720p resolution: -- Different Patterns; Record checkerboard pattern: +- Record checkerboard pattern: -- CPU Encoding; Record using host memory (CPU): +- CPU encoding with host memory:
📜 Review details
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Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~124-~124: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
16-16: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: build-and-deploy
🔇 Additional comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
1-305: Excellent documentation improvements overall.This README rewrite significantly improves the documentation quality:
- Clear structure with logical section organization
- Comprehensive command-line options documented in easy-to-read tables
- Practical, copy-paste ready examples for common use cases
- Detailed architecture and technical information
- Navigation links for easy reference
The reorganization makes the documentation more accessible and aligns well with the comprehensive README requirements for Holoscan applications. The examples are particularly well done with tips and multiple scenarios covered.
Based on learnings, this README satisfies all requirements for application documentation: purpose, usage, requirements, examples, and architecture information.
Signed-off-by: B Hashemian <[email protected]>
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Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Line 16: The "Supported Video Sources" and "Requirements" headings are
currently h3 (###) under the document's h1 and should be promoted to h2; update
the headings titled "Supported Video Sources" and "Requirements" to use h2 (##)
so they are direct children of the top-level title and the markdown heading
hierarchy is correct.
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
123-124: Minor style improvement: vary sentence beginnings.The width and height descriptions have three consecutive sentences starting with "For," which slightly impacts readability.
✨ Suggested rewording
-| `-w, --width <pixels>` | Frame width. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1920` | -| `-h, --height <pixels>` | Frame height. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1080` | +| `-w, --width <pixels>` | Frame width. V4L2 source: must match a supported camera resolution. Pattern source: any reasonable resolution (64-8192 pixels) | `1920` | +| `-h, --height <pixels>` | Frame height. V4L2 source: must match a supported camera resolution. Pattern source: any reasonable resolution (64-8192 pixels) | `1080` |
📜 Review details
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~124-~124: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
16-16: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: check-lint
🔇 Additional comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
1-305: Excellent documentation reorganization!The README has been substantially improved with clear section organization, comprehensive examples, well-formatted tables, and thorough architecture documentation. The structure now follows a logical flow from quick start through detailed usage and architecture information, making it much more accessible to users.
The documentation meets all requirements for a comprehensive application README, including purpose, usage, requirements, examples, and architecture details.
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: megnvidia <[email protected]>
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: megnvidia <[email protected]>
There was a problem hiding this comment.
Actionable comments posted: 1
🤖 Fix all issues with AI agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Line 16: Update the Markdown heading hierarchy by changing the "### Supported
Video Sources" and "### Requirements" headings to level-2 headings ("##
Supported Video Sources" and "## Requirements") so they follow the top-level
title correctly; locate the literal heading lines containing "Supported Video
Sources" and "Requirements" in README.md and replace the leading "###" with "##"
for each instance.
📜 Review details
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~124-~124: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
16-16: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: Greptile Review
🔇 Additional comments (9)
applications/gstreamer/gst_video_recorder/README.md (9)
1-15: Excellent introduction and overview!The opening section effectively communicates the application's purpose, key features, and capabilities. The pipeline diagram reference and feature bullets provide a clear entry point for users.
34-41: Well-structured table of contents.The internal navigation links are correctly formatted and provide helpful quick access to key sections.
42-53: Clear and user-friendly Quick Start section.The side-by-side table comparing V4L2 camera and pattern generator commands makes it immediately clear how to get started with either source. The explanation of what happens during execution is also helpful.
54-76: Excellent build guidance with clear options.The comparison table between containerized and local builds makes it easy for users to choose the appropriate approach. The explanation of
install_deps.shcontents is also helpful context.
98-139: Well-organized command-line options reference.The categorization into General, Resolution, V4L2 Camera, and Pattern Generator options makes it easy to find relevant settings. The tabular format with defaults and descriptions is clear and professional.
Note: The static analysis tool flagged repetitive use of "For" at line 123-124, but in this context, the parallel structure ("For V4L2..." / "For the pattern...") actually enhances clarity by maintaining consistent formatting across table cells.
140-149: Clear testing instructions.The testing section is concise and provides the essential command to validate the pipeline execution.
150-231: Comprehensive and practical examples section.The examples cover a wide range of use cases with copy-paste ready commands. The Tips subsection provides valuable guidance (using
v4l2-ctl, absolute paths, encoder requirements) that will help users avoid common pitfalls.
232-304: Thorough and technically accurate architecture documentation.The Architecture section effectively explains the application's design with clear pipeline flows, operator descriptions, and performance considerations. The Notes subsections provide valuable operational details about video sources and recording behavior.
1-304: Outstanding documentation reorganization!This README rewrite successfully achieves the NVIDIA style guide objectives with excellent results:
✅ Strengths:
- Clear, logical section hierarchy with Quick Start → Installation → Usage → Examples → Architecture flow
- Comprehensive command-line options presented in well-formatted tables
- Practical, copy-paste ready examples for both V4L2 and pattern generator sources
- Helpful tips and operational notes that anticipate user questions
- Technically accurate content throughout
- Good use of tables for comparisons (build options, command options)
- Proper internal navigation links
⚠️ Minor issue:
- Heading hierarchy violation at lines 16 and 21 (addressed in separate comment)
The reorganization significantly improves usability and aligns well with documentation best practices. Based on learnings, every application should include comprehensive README documentation with purpose, usage, requirements, examples, and architecture—this README exceeds those expectations.
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com> Signed-off-by: megnvidia <[email protected]>
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Actionable comments posted: 1
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
77-139: Fix heading level for Usage Reference section.Line 77 uses h3 (
###) but should be h2 (##) to maintain proper document hierarchy. This section is a top-level section, not a subsection of "Installation Guide".📝 Proposed fix
-### Usage Reference +## Usage Reference
🤖 Fix all issues with AI agents
In @applications/gstreamer/gst_video_recorder/README.md:
- Around line 16-33: The README uses non-sequential Markdown heading levels:
change the "Supported Video Sources" and "Requirements" headings (currently h3)
to be one level deeper than the preceding header so headings increment by one
(e.g., if the top-level title is h1, make "Supported Video Sources" h2 and
"Requirements" h2 or h3 as appropriate) ensuring heading hierarchy is
sequential; update those heading markers for the sections named "Supported Video
Sources" and "Requirements" accordingly.
🧹 Nitpick comments (1)
applications/gstreamer/gst_video_recorder/README.md (1)
123-124: Reduce sentence repetition for improved readability.Lines 123-124 begin three consecutive clauses with "For", which can affect readability.
✏️ Optional rephrasing suggestion
-| `-w, --width <pixels>` | Frame width. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1920` | -| `-h, --height <pixels>` | Frame height. For V4L2: Must match a supported camera resolution. For the pattern: any reasonable resolution (64-8192 pixels) | `1080` | +| `-w, --width <pixels>` | Frame width. V4L2 sources must match a supported camera resolution. Pattern sources accept any reasonable resolution (64-8192 pixels) | `1920` | +| `-h, --height <pixels>` | Frame height. V4L2 sources must match a supported camera resolution. Pattern sources accept any reasonable resolution (64-8192 pixels) | `1080` |Based on static analysis hints.
📜 Review details
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
applications/gstreamer/gst_video_recorder/README.md
🧰 Additional context used
🧠 Learnings (3)
📚 Learning: 2025-12-18T16:19:45.117Z
Learnt from: CR
Repo: nvidia-holoscan/holohub PR: 0
File: CONTRIBUTING.md:0-0
Timestamp: 2025-12-18T16:19:45.117Z
Learning: Applies to **/(@(operators|applications|workflows|gxf_extensions))/**/README.md : Every application and operator must include a comprehensive README.md file with purpose, usage, requirements, examples, and architecture information
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:21:10.281Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/cpp/streaming_client_demo.yaml:42-49
Timestamp: 2025-10-22T16:21:10.281Z
Learning: V4L2VideoCaptureOp in Holoscan SDK performs internal conversion from the camera's native pixel format (specified by the pixel_format parameter) to RGBA8888 output, regardless of the input format (e.g., YUYV, MJPEG). When using V4L2 as a source, downstream operators should expect RGBA8888 (4-channel) output format.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
📚 Learning: 2025-10-22T16:33:55.411Z
Learnt from: cdinea
Repo: nvidia-holoscan/holohub PR: 1170
File: applications/video_streaming/video_streaming_client/python/streaming_client_demo_replayer.yaml:27-36
Timestamp: 2025-10-22T16:33:55.411Z
Learning: In the video_streaming bidirectional client applications (applications/video_streaming/video_streaming_client), the pipeline has two separate data paths: (1) Outgoing: source → format_converter → streaming_client INPUT (sends to server), and (2) Incoming: streaming_client OUTPUT → holoviz (receives from server). The format_converter prepares data for transmission and does NOT feed directly into holoviz visualization.
Applied to files:
applications/gstreamer/gst_video_recorder/README.md
🪛 LanguageTool
applications/gstreamer/gst_video_recorder/README.md
[style] ~124-~124: Three successive sentences begin with the same word. Consider rewording the sentence or use a thesaurus to find a synonym.
Context: ...st match a supported camera resolution. For the pattern: any reasonable resolution ...
(ENGLISH_WORD_REPEAT_BEGINNING_RULE)
🪛 markdownlint-cli2 (0.18.1)
applications/gstreamer/gst_video_recorder/README.md
16-16: Heading levels should only increment by one level at a time
Expected: h2; Actual: h3
(MD001, heading-increment)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)
- GitHub Check: Greptile Review
- GitHub Check: build-and-deploy
…preview markdown Signed-off-by: meg miranda <[email protected]>
Signed-off-by: B Hashemian <[email protected]>
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LGTM! Thanks @megnvidia for the improvements.
|
@megnvidia there is an issue with DCO, and it causes conflicts when I am trying to fix. I will fix this and merge. However, for the future PR, please don't forget to sign off all your commits using |
3 participants
Nvidia style guide edits to one readme file
Please add reviewers. I am learning the team and processes at this stage.
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