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

Erik Slagter erik
Sun Feb 19 19:56:51 CET 2006

On Sun, 2006-02-19 at 19:31 +0100, Baptiste COUDURIER wrote:
> >> movenc_ctts.patch
> >> which write ctts atom needed for AVC in mp4 files.
> > Is this the one for making b frames "work"?
> Yes it is.

Although it already worked with mplayer... Makes you wonder why it's
required in the first place, not?

> > 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
> > otherwise?
> MP4Box -hint test.mp4
>                                          acid at cassiopee #5973
> Hinting file with Path-MTU 1500 Bytes
> Hinting track ID 1 - Type "avc1:avc1" (H264) - BW 728 kbps
> Hinting track ID 2 - Type "mp4a:mp4a" (mpeg4-generic) - BW 63 kbps
> Saving test.mp4: 0.500 secs Interleaving
> Is that good ?

Don't know ;-)

I was actually referring to:

MP4Box -raw 1 <mp4-file-with-h264-video-from-ffmpeg>

Can you please check this? What version of gpac are you using? I am
using cvs from last week.

> > 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
> > suggestions?

> Exactly, mostly Apple stuff, FCP, Quicktime player. I based my efforts
> on samples produced by FCP.

Hmmm. It would be nice if there was some test suite or reference
"player". But at least if quicktime can play it, I guess most people
will be happy ;-)

I guess you already checked quicktime player, and it didn't play before
your patches and it did after your patches? Sorry to sound a bit
ungrateful here ;-)
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