[Ffmpeg-devel] [PATCH] x264 avc encoding, movenc avcC, ctts

Erik Slagter erik
Sun Feb 19 19:20:49 CET 2006

On Sun, 2006-02-19 at 18:23 +0100, Baptiste COUDURIER wrote:
> Here is 4 patches:

Nice to see someone's working on it. You beat me on it, the book on mp4
is still not delivered :-(. Maybe it can be helpful later, to clear up
the details, it looks like the ffmpeg mp4 muxer still lacks quite a few

> movenc_ctts.patch
> which write ctts atom needed for AVC in mp4 files.

Is this the one for making b frames "work"?

> movenc_avc.patch
> which write avcC atom needed for AVC in mp4 files.

Okay, nice.

> x264_avc_nal_encode.patch
> which encodes nals correctly for AVC and write extradata for avcC atom.

Would this by any chance also fix the problem where MP4Box segfaults on
extracting raw h264 from mp4's muxed by ffmpeg? Can you check this

Do you have any means to check the validity of the stream produced by
ffmpeg, I guess something like Quicktime player? I don't have windows
nor macos, so for me it's going to get difficult to check, or

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