[FFmpeg-user] Audio Stream Mapping issue

[Tim Nicholson]

According to http://ffmpeg.org/ffmpeg.html#Main-options
"ffmpeg -i INPUT -map 0 -c:v libx264 -c:a copy OUTPUT
encodes all video streams with libx264 and copies all audio streams"

However I have an mxf file with 1 video and 4 audio streams I am trying 
to rewrap as a mov where I seem unable to get more than a single audio 
stream copied.

I have tried the following command lines:-

ffmpeg -i in.mxf -vcodec copy -acodec copy tim2.mov

ffmpeg -i in.mxf -vcodec copy -acodec copy -ac 4 tim2.mov

ffmpeg -i in.mxf -vcodec copy -c:a copy tim2.mov

ffmpeg -i in.mxf -vcodec copy -c:a:0 copy -c:a:1 copy -c:a:2 copy -c:a:3 
copy  tim2.mov

fmpeg -i in.mxf -vcodec copy -ac 4 -c:a:0 copy -c:a:1 copy -c:a:2 copy 
-c:a:3 copy  tim2.mov

But all produce the same result:-

ffmpeg version N-34849-g07c7ffc-by_Tim, Copyright (c) 2000-2011 the 
FFmpeg developers
   built on Nov 14 2011 12:24:11 with gcc 4.5.1 20101208 [gcc-4_5-branch 
revision 167585]
   configuration: --extra-version=by_Tim --enable-static 
--disable-shared --enable-gpl --enable-nonfree --enable-version3 
--prefix=/mnt/store-0/tims/ffmpeg-tux/usr/local 
--enable-runtime-cpudetect --extra-cflags='-static 
-I/mnt/store-0/tims/ffmpeg-tux/usr/local/include' 
--extra-ldflags='-static -L/mnt/store-0/tims/ffmpeg-tux/usr/local/lib' 
--progs-suffix=STATIC --enable-libfaac --enable-libx264
   libavutil    51. 24. 1 / 51. 24. 1
   libavcodec   53. 33. 0 / 53. 33. 0
   libavformat  53. 20. 0 / 53. 20. 0
   libavdevice  53.  4. 0 / 53.  4. 0
   libavfilter   2. 48. 1 /  2. 48. 1
   libswscale    2.  1. 0 /  2.  1. 0
   libpostproc  51.  2. 0 / 51.  2. 0

Seems stream 0 codec frame rate differs from container frame rate: 50.00 
(50/1) -> 25.00 (50/2)
Input #0, mxf, from 'JH3-AVCi100.mxf':
   Duration: 00:00:31.96, start: 0.000000, bitrate: 117147 kb/s
     Stream #0:0: Video: h264 (High 4:2:2 Intra), yuv422p10le, 1920x1080 
[SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 50 tbc
     Stream #0:1: Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s
     Stream #0:2: Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s
     Stream #0:3: Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s
     Stream #0:4: Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s
Output #0, mov, to 'tim2.mov':
   Metadata:
     encoder         : Lavf53.20.0
     Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv422p10le, 
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbn, 25 tbc
     Stream #0:1: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 
channels, 768 kb/s
Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help

-- 
Tim

http://www.bbc.co.uk/
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