[FFmpeg-devel] H.264 de-muxer replaces NALU units with sizes?

Kieran Kunhya kieran
Sun Jan 16 13:19:33 CET 2011

> When reading H264 encoded video in an FLV container, the
> muxer (ffmpeg
> > in this case) strips all NALU initialization headers
> and replaces them
> > with the size of the following information, in
> bytes.

They have it the wrong way round. In an FLV container the NALU
data doesn't have startcodes to begin with. They have "MP4 style"
lengths. FFmpeg doesn't do anything to the stream.

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