Error : EXCEPTION_ACCESS_VIOLATION

[JamesO2x]

I'm getting errors running this addon. It seems to produce 6 mp4 files as expected, but only one of them actually works. The other 5 appear corrupted, and cant be played in VLC. Also, the concatenate doesn't seem to be happening, maybe due to the errors?

I looked at Blender's logs and here's what I found:

Error   : EXCEPTION_ACCESS_VIOLATION
Address : 0x00007FF6D3298B7B
Module  : blender.exe
Thread  : 000032ac
Writing: C:\Users\USER\AppData\Local\Temp\Video_Edits_3.crash.txt
Append frame 5768
 Time: 00:00.16 (Saving: 00:00.03)

Its getting an access violation. I wonder why? I'm not running out of space or anything, and I don't think any of my files are locked or anything. I can send the crash.txt file if need be.

[JamesO2x]

Ok, there's a brief message before you press the "Parallel Render" button that says something about "unsaved changes" in the Blend file, and needing to create a TEMP directory. My guess is that the corrupted videos were due to unsaved changes. I made sure to save my BLEND file and redo the Parallel Render. It rendered all the parts no issue.

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EDIT: I think the issue is actually that all of the Blender threads are trying to access the CACHE at the same time, causing a file access violation. I tried using Parallel render on a new project, and I had to run it 3 times (which kind of defeats the point).

I'm not sure how to solve this issue yet.

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The CONCAT command still didn't work for some reason.

For anyone reading, you can manually concat using FFMPEG like this:

1. create a file called "vidlist.txt"
2. list all the parts of your video in that file like this:

file 'C:\VSE\part_01.mp4'
file 'C:\VSE\part_02.mp4'
file 'C:\VSE\part_03.mp4'
etc, etc.

3. then run this command (or use a batch file): ffmpeg -f concat -safe 0 -i vidlist.txt -c copy output.mp4

This will take all the videos in your list and concat them as "output.mp4".