[FFmpeg-trac] #553(FFmpeg:new): ffmpeg fails to transcode VCD file

[FFmpeg]

#553: ffmpeg fails to transcode VCD file
----------------------------------+---------------------------------
               Reporter:  nostah  |                  Owner:  michael
                   Type:  defect  |                 Status:  new
               Priority:  normal  |              Component:  FFmpeg
                Version:  0.8.5   |               Keywords:
             Blocked By:          |               Blocking:
Reproduced by developer:  0       |  Analyzed by developer:  0
----------------------------------+---------------------------------
 I have a MPEG2 video file that is stored inside MPEG1 container. During
 transcoding ffmpeg fails with the following message:


 FFmpeg version SVN-r25838, Copyright (c) 2000-2010 the FFmpeg developers
   built on Oct  5 2011 13:59:08 with gcc 4.4.5
   configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g
 ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl
 --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid
 --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264
 --enable-libspeex --enable-nonfree --disable-stripping --enable-avfilter
 --enable-libdirac --disable-decoder=libdirac --enable-libschroedinger
 --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg
 --enable-libvpx --enable-librtmp --extra-libs=-lgcrypt --disable-altivec
 --disable-armv5te --disable-armv6 --disable-vis
   libavutil     50.33. 0 / 50.33. 0
   libavcore      0.14. 0 /  0.14. 0
   libavcodec    52.97. 2 / 52.97. 2
   libavformat   52.87. 1 / 52.87. 1
   libavdevice   52. 2. 2 / 52. 2. 2
   libavfilter    1.65. 0 /  1.65. 0
   libswscale     0.12. 0 /  0.12. 0
   libpostproc   51. 2. 0 / 51. 2. 0
 [mpeg2video @ 0x15f01f0] mpeg_decode_postinit() failure
     Last message repeated 13 times
 [mpeg @ 0x15ed760] max_analyze_duration reached
 Input #0, mpeg, from 'mpeg2_in_mpeg1.vcd':
   Duration: 00:00:32.99, start: 0.500000, bitrate: 2114 kb/s
     Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x480 [PAR 8:9 DAR
 4:3], 2000 kb/s, 32.57 fps, 29.97 tbr, 90k tbn, 59.94 tbc
     Stream #0.1[0x1c0]: Audio: mp2, 0 channels
 [buffer @ 0x15f4fc0] w:720 h:480 pixfmt:yuv420p
 [libfaac @ 0x15f4880] encoding 0 channel(s) is not allowed
 Output #0, mp4, to '/tmp/test.mp4':
     Stream #0.0: Video: mpeg4, yuv420p, 720x480 [PAR 8:9 DAR 4:3], q=2-31,
 200 kb/s, 90k tbn, 29.97 tbc
     Stream #0.1: Audio: libfaac, 0 channels, s16, 64 kb/s
 Stream mapping:
   Stream #0.0 -> #0.0
   Stream #0.1 -> #0.1
 Error while opening encoder for output stream #0.1 - maybe incorrect
 parameters such as bit_rate, rate, width or height


 I used this command:

 $ ffmpeg -i mpeg2_in_mpeg1.vcd -vcodec mpeg4 -acodec libfaac /tmp/test.mp4

 No matter what bitrates/width/height or other parameters I use, I always
 get this message. The only thing that can make ffmpeg to transcode is to
 disable audio with -an option. But this results in movie without audio
 track.

 It seems that ffmpeg/ffplay could not determine audio track parameters.
 I've tried ffmpeg versions 0.6.1, 0.8.4 and 0.8.5 from debian-multimedia
 packages.

 At the same time mediainfo recognizes properly the both audio and video
 tracks:


 General
 Complete name                            : mpeg2_in_mpeg1.vcd
 Format                                   : MPEG-PS
 File size                                : 8.32 MiB
 Duration                                 : 33s 144ms
 Overall bit rate                         : 2 105 Kbps

 Video
 ID                                       : 224 (0xE0)
 Format                                   : MPEG Video
 Format version                           : Version 2
 Format profile                           : Main at Main
 Format settings, BVOP                    : Yes
 Format settings, Matrix                  : Custom
 Format settings, GOP                     : M=3, N=15
 Duration                                 : 33s 33ms
 Bit rate                                 : 1 967 Kbps
 Maximum bit rate                         : 2 000 Kbps
 Width                                    : 720 pixels
 Height                                   : 480 pixels
 Display aspect ratio                     : 4:3
 Frame rate                               : 29.970 fps
 Standard                                 : NTSC
 Color space                              : YUV
 Chroma subsampling                       : 4:2:0
 Bit depth                                : 8 bits
 Scan type                                : Interlaced
 Scan order                               : Top Field First
 Compression mode                         : Lossy
 Bits/(Pixel*Frame)                       : 0.190
 Stream size                              : 7.75 MiB (93%)

 Audio
 ID                                       : 192 (0xC0)
 Format                                   : MPEG Audio
 Format version                           : Version 1
 Format profile                           : Layer 2
 Duration                                 : 33s 144ms
 Bit rate mode                            : Constant
 Bit rate                                 : 96.0 Kbps
 Channel(s)                               : 2 channels
 Sampling rate                            : 48.0 KHz
 Compression mode                         : Lossy
 Delay relative to video                  : 6s 167ms
 Stream size                              : 388 KiB (5%)


 Also VLC (linux) or Quicktime player (mac) plays this file with both audio
 and video.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/553>
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