No audio in output when the audio starts late in VOB file

[streamingguy]

Here are the details about the issue:

Source: .VOB file extracted from DVD decrypter (first chapter of the movie). This has one video stream, one audio stream (AC3 5.1).

Issue: When I try to encode into any format, it reports 0 channels in ac3 stream and there is no audio track in the output. I tried with directly copying the AC3 stream, encoding AC3 to AAC, using analyzeduration option etc.,

But, the same file is working fine when I use Handbrake, MEncoder.

Source to download: You can download .VOB file here: ​http://poacric.blob.core.windows.net/$root/TestClip.zip

Command Used: ffmpeg -i d:\testclip.vob -acodec copy d:\ffmpegout.mp4

Console output:

C:\ffmpeg>ffmpeg -i d:\testclip.vob -acode
c copy d:\ffmpegout.mp4
ffmpeg version N-35966-g1d0ae92, Copyright (c) 2000-2011 the FFmpeg developers
  built on Dec 19 2011 13:10:19 with gcc 4.6.2
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3
 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzli
b --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable
-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-l
ibrtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-li
bvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-l
ibx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil    51. 32. 0 / 51. 32. 0
  libavcodec   53. 46. 1 / 53. 46. 1
  libavformat  53. 27. 0 / 53. 27. 0
  libavdevice  53.  4. 0 / 53.  4. 0
  libavfilter   2. 53. 0 /  2. 53. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[mpeg @ 0000000000497FD0] max_analyze_duration 5000000 reached at 5004667

Seems stream 0 codec frame rate differs from container frame rate: 59.94 (60000/
1001) -> 59.94 (60000/1001)
Input #0, mpeg, from 'd:\testclip.vob':
  Duration: 00:04:51.99, start: 0.316978, bitrate: 4939 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 32:27 DA
R 16:9], 8000 kb/s, 23.98 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x80]: Audio: ac3, 0 channels
[buffer @ 00000000029E0BE0] w:720 h:480 pixfmt:yuv420p tb:1/1000000 sar:32/27 sw
s_param:
[libx264 @ 00000000027E0810] using SAR=32/27
[libx264 @ 00000000027E0810] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShu
ffle SSE4.2
[libx264 @ 00000000027E0810] profile High, level 3.1
[libx264 @ 00000000027E0810] 264 - core 119 r2106 07efeb4 - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 r
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pski
p=1 chroma_qp_offset=-2 threads=12 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 di
rect=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra
_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69
qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'd:\ffmpegout.mp4':
  Metadata:
    encoder         : Lavf53.27.0
    Stream #0:0: Video: h264 (![0][0][0] / 0x0021), yuv420p, 720x480 [SAR 32:27
DAR 16:9], q=-1--1, 60k tbn, 59.94 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video -> libx264)
Press [q] to stop, [?] for help
[mpeg2video @ 00000000004AB7C0] warning: first frame is no keyframe
    Last message repeated 1 times
frame=  117 fps=  0 q=31.0 size=     273kB time=00:00:00.98 bitrate=2273.2kbits/
frame=  205 fps=201 q=31.0 size=     602kB time=00:00:02.45 bitrate=2011.7kbits/
frame=  282 fps=183 q=31.0 size=     861kB time=00:00:03.73 bitrate=1887.4kbits/
frame=  367 fps=178 q=31.0 size=    1179kB time=00:00:05.15 bitrate=1874.1kbits/
frame=  466 fps=182 q=31.0 size=    1376kB time=00:00:06.80 bitrate=1655.8kbits/
frame=  475 fps=175 q=-1.0 Lsize=    1401kB time=00:00:07.89 bitrate=1454.6kbits
/s dup=273 drop=0
video:1396kB audio:0kB global headers:0kB muxing overhead 0.367020%
[libx264 @ 00000000027E0810] frame I:3     Avg QP:23.66  size: 48841
[libx264 @ 00000000027E0810] frame P:309   Avg QP:26.15  size:  4086
[libx264 @ 00000000027E0810] frame B:163   Avg QP:30.33  size:   122
[libx264 @ 00000000027E0810] consecutive B-frames: 49.5%  7.2% 21.5% 21.9%
[libx264 @ 00000000027E0810] mb I  I16..4: 25.5% 46.0% 28.5%
[libx264 @ 00000000027E0810] mb P  I16..4:  1.0%  0.6%  0.0%  P16..4: 22.2%  4.5
%  4.5%  0.0%  0.0%    skip:67.1%
[libx264 @ 00000000027E0810] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 11.1%  0.0
%  0.0%  direct: 0.0%  skip:88.9%  L0:57.4% L1:39.9% BI: 2.6%
[libx264 @ 00000000027E0810] 8x8 transform intra:40.0% inter:74.5%
[libx264 @ 00000000027E0810] coded y,uvDC,uvAC intra: 44.1% 49.2% 24.7% inter: 1
1.6% 4.2% 1.0%
[libx264 @ 00000000027E0810] i16 v,h,dc,p: 39% 42%  6% 13%
[libx264 @ 00000000027E0810] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 32% 37%  3%  2%
 2%  4%  3%  7%
[libx264 @ 00000000027E0810] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 64% 14%  2%  2%
 2%  3%  2%  5%
[libx264 @ 00000000027E0810] i8c dc,h,v,p: 40% 48% 10%  2%
[libx264 @ 00000000027E0810] Weighted P-Frames: Y:0.3% UV:0.3%
[libx264 @ 00000000027E0810] ref P L0: 67.2% 13.1% 10.0%  9.8%
[libx264 @ 00000000027E0810] ref B L0: 98.4%  1.3%  0.3%
[libx264 @ 00000000027E0810] ref B L1: 96.1%  3.9%
[libx264 @ 00000000027E0810] kb/s:1442.51
Received signal 2: terminating.

Please let me know, if you need any more information.

I have been searching for a proper encoder from past 2 months and couldn't find a working solution.

My requirement: I have several DVDs and want to convert them into MP4/M2TS/TS files with 2 audio streams (AC3 5.1 and AAC). Also, want to add watermark on the output. Tried different encoders, but nothing is working as per my requirement.

Thank you for your time!

[Carl Eugen Hoyos]

Please always provide current git head output on this bug tracker and I believe I suggested another, significantly better command line.

Do you think this is a regression?

[ski]

I'm having the same problem with late audio. When I try to convert next VOB file from the same DVD there is no problem with audio.

$ ffmpeg -i VTS_11_1.VOB test.mp4 
ffmpeg version git-2012-07-31-52bd9cb Copyright (c) 2000-2012 the FFmpeg developers
  built on Jul 31 2012 15:00:10 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --prefix=/home/test/20120731 --disable-doc --disable-network --disable-ffserver --enable-gpl --enable-version3 --enable-shared --enable-debug --disable-stripping --enable-pthreads --enable-runtime-cpudetect --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-libx264 --enable-libvpx
  libavutil      51. 66.100 / 51. 66.100
  libavcodec     54. 46.100 / 54. 46.100
  libavformat    54. 22.100 / 54. 22.100
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3.  5.101 /  3.  5.101
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[mpeg @ 0x170c240] max_analyze_duration 5000000 reached at 5000000
Input #0, mpeg, from 'VTS_11_1.VOB':
  Duration: 00:18:32.25, start: 0.287267, bitrate: 7722 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 9800 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x80]: Audio: ac3, 0 channels
    Stream #0:2[0x81]: Audio: ac3, 0 channels
    Stream #0:3[0x82]: Audio: ac3, 0 channels
    Stream #0:4[0x83]: Audio: ac3, 0 channels

Head:

commit 52bd9cb4d29bc086f45f239c56a6a3c63406a073
Author: Stefano Sabatini <stefasab@xxxxxxxxx>
Date:   Mon Jul 30 19:46:36 2012 +0200

[Cigaes]

Replying to ski:

[mpeg @ 0x170c240] max_analyze_duration 5000000 reached at 5000000

Try to raise analyzeduration to something much higher; do not forget to raise probesize too if it becomes the limitating factor. You may want to read this:
​http://www.ffmpeg.org/faq.html#Why-does-FFmpeg-not-see-the-subtitles-in-my-VOB-file_003f
Although this is about subtitles, I suspect this is a similar issue.

[Michael Niedermayer]

The url to download the VOB file seems not working (anymore?)

[streamingguy]

Hello Michael,

I have uploaded the same file to: ​http://poacric.blob.core.windows.net/ffmpeg/TestClip.zip

Let me know, if you need any other details.

Thanks

[Carl Eugen Hoyos]

The sample was already provided in ticket #386, now moved to samples/ffmpeg-bugs/trac/ticket948/

$ ffmpeg -probesize 9M -analyzeduration 21M -i tickets/ticket386/TestClip.VOB
ffmpeg version N-43846-g168ddcd Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 23 2012 23:35:40 with gcc 4.5.3 (GCC)
  configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc
  libavutil      51. 70.100 / 51. 70.100
  libavcodec     54. 54.100 / 54. 54.100
  libavformat    54. 25.104 / 54. 25.104
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3. 13.100 /  3. 13.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
[mpeg @ 0x147f420] max_analyze_duration 21000000 reached at 21003678
Input #0, mpeg, from 'tickets/ticket386/TestClip.VOB':
  Duration: 00:04:52.34, start: 0.316978, bitrate: 4933 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 32:27 DAR 16:9], 8000 kb/s, 27.25 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), s16, 448 kb/s
At least one output file must be specified