[FFmpeg-trac] #1806(FFmpeg:new): Audio/video stream order reversed in remuxed VOB files

[FFmpeg]

#1806: Audio/video stream order reversed in remuxed VOB files
-------------------------------------+-------------------------------------
             Reporter:  paulbu       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:  FFmpeg       |                  Version:
             Keywords:  stream VOB   |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
 Summary of the bug:
 I am using ffmpeg to edit and remultiplex unencrypted VOB files (from a HD
 recorder). When copying (ie not transcoding) the streams ffmpeg ALWAYS
 insists on making the audio stream ID 0 and video stream ID 1 even though
 the input file was the other way round and it reports itself as NOT doing
 this.

 Using the -map commands also seem to be ignored wherever they appear on
 the command line.

 (This is a problem because I am using dvdauthor on the files and it only
 seems to work with VOB files with video as the first stream. Fails with
 infamous ERR: Cannot infer pts for VOBU if there is no audio or video and
 it is the first VOBU.)

 How to reproduce (with any vob file 'input.vob'):
 % ffmpeg -i input.vob -target pal-dvd -codec copy output.vob
 ffmpeg version N-45279-g1a104bf Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Oct 10 2012 19:21:13 with gcc 4.7.2 (GCC)
 Input #0, mpeg, from 'input.vob':
   Duration: 00:01:28.15, start: 137.626044, bitrate: 2858 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 352x576 [SAR
 24:11 DAR 4:3], 3060 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
 Output #0, dvd, to 'output.vob':
   Metadata:
     encoder         : Lavf54.31.100
     Stream #0:0: Video: mpeg2video, yuv420p, 352x576 [SAR 24:11 DAR 4:3],
 q=2-31
 , 3060 kb/s, 25 fps, 90k tbn, 25 tbc
     Stream #0:1: Audio: ac3, 48000 Hz, stereo, 256 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)

 But running ffprobe on resulting 'output.vob':
 Input #0, mpeg, from 'output.vob':
   Duration: 00:01:28.15, start: 1.000000, bitrate: 2877 kb/s
     Stream #0:0[0x80]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p, 352x576 [SAR
 24:11 DAR 4:3], 3060 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc

 Streams swapped round!

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1806>
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