How to extract raw VP9 stream from WebM file?

Question

Is there a way to extract just the VP9 video stream from a WebM file? Just the raw VP9 encoded data? I mean the data you would usually use as the input to the VP9 decoder?

Which tool is the right one to do this? ffmpeg?

Answer 1

VP9 does not have a pure raw bitstream format. The closest thing is the lightweight IVF format - 32 byte global header + 12 byte header per frame .

Use

ffmpeg -i input.webm -c copy stream.ivf