simplified_streamer

Container formats (has video tracks and audio tracks)

• mpeg 4 | mp4 : apple stuff
• ogg opensource
• flash | adobe
• WebM | open source | tailored toward html5
• avi | microsoft simple time

video codec (code and decode)

• nowaday, video don't usually store frame by frame, but the differences from one frame to the next -> put more work on computation instead of storage -> higher compression rate -> smaller file size

lossless video is too big for the web. Focus on lossy video codecs -> information is being irretrivably loss during encoding.

video codec

• Theora - open source - ogg

• vp8 - google owned

audio codec

bandwidth is precious

tricking your ears into not noticing the parts that are missing

Need to make an encoding workflow

• 1 version of WebM (.webm)
• 1 versuib that uses H.264 baseline video and AAC low complexity audio in an MP4 container (.mp4)
• 1 version that uses Theora video and Vorbis audio in an Ogg container (.ogv) `
• link all 3 video files from a single

Example

See video infor

mplayer -vo null -ao null -identify -frames 0

or

ffprobe -v error -show_format -show_streams a.mp4

ffmpeg -i input.avi -c:v libx264 -crf 23 -c:a aac -movflags faststart output.mp4

Scratch area

Video router to a id tag instead of file path, look up on database and get the file path

Add tv series using folder and pattern matching

If video_player is focused, change the background for its container

batch proces

ls | sort -nt'(' -k2 sort -V