[FFmpeg-user] Remuxing Into "aivx" MOV

[Vincent Olivier]

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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