[FFmpeg-user] Remuxing Into "aivx" MOV

[Bryce McLeod]

For 1) you can stop the mov muxer changing the time base by using its
-video_track_timescale option, eg for 24fps content:

ffmpeg -i in.mxf -vcodec copy -acodec copy -f mov -video_track_timescale 24
out.mov

Regards

On Wed, Mar 12, 2014 at 12:53 PM, Vincent Olivier <vincent at up4.com> wrote:

> Hi,
>
> Starting from Stefano Sabatini's remuxin.c, I'm trying to remux an XAVC
> video stream (AVC/H.264 High 4:2:2 Intra 10-bit) from a MXF file into a MOV
> file made to look like the output of FCPX's own remuxing of the same source
> file (codec tag "aivx"). Specifically, using the ffprobe -show_data
> -show_streams command. I can see that there are still a couple of important
> differences between what I can get with FFMPEG and the file produced by
> FCPX (Final Cut Pro X 10.1). No matter what I try, it seems that the MOV
> FFMPEG "format" remangles those values after I have specifically set them.
> Namely, all for the video stream:
>
> 1) time_base: I'm setting 1/24000 and I'm getting 1/12288
>
> 2) extradata: here, I'm getting something mangled beyond recognition after
> explicitly setting the target metadata to the source metadata with this
> code:
>
>         out_stream->codec->extradata = in_stream->codec->extradata;
>         out_stream->codec->extradata_size =
> in_stream->codec->extradata_size;
>
> The other values (avg_frame_rate, duration, duration_ts) all seem to be
> calculated from the time_base, so I will stick to those two for now. How to
> deterministically set those values for a AVC/H.264 video stream to be muxed
> into a MOV file with FFMPEG?
>
> Thanks!
>
> Vincent
>
> Here is the FFMPEG version I'm using on Mac OS X 10.9.2:
>
> ffmpeg version 2.1.git-ffb7d71
> built on Mar  4 2014 08:48:40 with Apple LLVM version 5.0 (clang-500.2.79)
> (based on LLVM 3.3svn)
> configuration: --prefix=/opt/local --enable-swscale --enable-avfilter
> --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus
> --enable-libtheora --enable-libschroedinger --enable-libopenjpeg
> --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass
> --enable-libbluray --enable-gnutls --enable-fontconfig --enable-libfreetype
> --disable-indev=jack --disable-outdev=xv --mandir=/opt/local/share/man
> --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64
> --enable-yasm --enable-gpl --enable-postproc --enable-libx264
> --enable-libxvid --enable-nonfree --enable-libfdk-aac --enable-libfaac
> libavutil      52. 66.100 / 52. 66.100
> libavcodec     55. 52.102 / 55. 52.102
> libavformat    55. 33.100 / 55. 33.100
> libavdevice    55. 10.100 / 55. 10.100
> libavfilter     4.  2.100 /  4.  2.100
> libavresample   1.  2.  0 /  1.  2.  0
> libswscale      2.  5.101 /  2.  5.101
> libswresample   0. 18.100 /  0. 18.100
> libpostproc    52.  3.100 / 52.  3.100
> _______________________________________________
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> ffmpeg-user at ffmpeg.org
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>
>


-- 
Bryce McLeod