Re: [FFmpeg-user] VOB files convertion failed

Wed, 09 May 2018 02:11:24 -0700

On 2018-05-07 at 8:13 PM EDT, Jamenson Ferreira Espindula de Almeida Melo wrote: 
 From Jaboatão dos Guararapes, Pernambuco, Brazil.

Thank you for your response.

Below is the listing of a DVD movie disc. I want to convert these files
to one file. The files already are on my hard disk.

total 4,2G
-r--r--r-- 1 jamenson jamenson 124K fev  2  2010 video_ts.vob
-r--r--r-- 1 jamenson jamenson 320M fev  2  2010 vts_01_0.vob
-r--r--r-- 1 jamenson jamenson 1,0G fev  2  2010 vts_01_1.vob
-r--r--r-- 1 jamenson jamenson 1,0G fev  2  2010 vts_01_2.vob
-r--r--r-- 1 jamenson jamenson 1,0G fev  2  2010 vts_01_3.vob
-r--r--r-- 1 jamenson jamenson 735M fev  2  2010 vts_01_4.vob
-r--r--r-- 1 jamenson jamenson  11M fev  2  2010 vts_02_0.vob
-r--r--r-- 1 jamenson jamenson 8,0K fev  2  2010 vts_02_1.vob
-r--r--r-- 1 jamenson jamenson 8,0K fev  2  2010 vts_03_1.vob
-r--r--r-- 1 jamenson jamenson 159M fev  2  2010 vts_04_1.vob
-r--r--r-- 1 jamenson jamenson 8,0K fev  2  2010 vts_05_1.vob

So, first of all, I concatenate the eleven files to one file with this
command:


cat *vob > crepusculo.vob


Second I have analyze the contents of that file with this command:


ffprobe -hide_banner -analyzeduration 500M -probesize 500M -i \
crepusculo.vob


The output of that command was:


Input #0, mpeg, from '/tmp/crepusculo.vob':
   Duration: 00:01:43.71, start: 0.280633, bitrate: 347394 kb/s
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top \
     first), 720x480 [SAR 32:27 DAR 16:9], 8000 kb/s, 29.97 fps, 29.97 \
     tbr, 90k tbn, 59.94 tbc

     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:3[0x20]: Subtitle: dvd_subtitle
     Stream #0:4[0x21]: Subtitle: dvd_subtitle
     Stream #0:5[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Unsupported codec with id 100357 for input stream 0


ffmpeg -version output:


ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.2.0 (GCC)
configuration: --prefix=/usr --enable-gpl --enable-version3 \
--enable-nonfree --disable-static --enable-shared --disable-debug \
--enable-libass --enable-libfdk-aac --enable-libfreetype \
--enable-libmp3lame --enable-libopus --enable-libtheora \
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 \
--enable-openssl --docdir=/usr/share/doc/ffmpeg-3.3.3

libavutil      55. 58.100 / 55. 58.100
libavcodec     57. 89.100 / 57. 89.100
libavformat    57. 71.100 / 57. 71.100
libavdevice    57.  6.100 / 57.  6.100
libavfilter     6. 82.100 /  6. 82.100
libswscale      4.  6.100 /  4.  6.100
libswresample   2.  7.100 /  2.  7.100
libpostproc    54.  5.100 / 54.  5.100


First try: I tried the Matroska container. Below is the command:


ffmpeg -analyzeduration 500M -probesize 500M -i crepusculo.vob \
-map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 \
-metadata:s:a:0 language=eng -metadata:s:a:0 title="English stereo" \
-metadata:s:a:1 language=por -metadata:s:a:1 title="Português estereo" \
-metadata:s:s:0 language=eng -metadata:s:s:0 title="English" \
-metadata:s:s:1 language=por -metadata:s:s:1 title="Português" \
-codec:v copy -crf 20 -codec:a copy -qscale:a 2 -codec:s copy \
crepusculo.mkv


The command output was:


ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 7.2.0 (GCC)
   configuration: --prefix=/usr --enable-gpl --enable-version3 \
   --enable-nonfree --disable-static --enable-shared --disable-debug \
   --enable-libass --enable-libfdk-aac --enable-libfreetype \
   --enable-libmp3lame --enable-libopus --enable-libtheora \
   --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 \
   --enable-openssl --docdir=/usr/share/doc/ffmpeg-3.3.3

   libavutil      55. 58.100 / 55. 58.100
   libavcodec     57. 89.100 / 57. 89.100
   libavformat    57. 71.100 / 57. 71.100
   libavdevice    57.  6.100 / 57.  6.100
   libavfilter     6. 82.100 /  6. 82.100
   libswscale      4.  6.100 /  4.  6.100
   libswresample   2.  7.100 /  2.  7.100
   libpostproc    54.  5.100 / 54.  5.100
Input #0, mpeg, from 'crepusculo.vob':
   Duration: 00:01:43.71, start: 0.280633, bitrate: 347394 kb/s
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top \
     first), 720x480 [SAR 32:27 DAR 16:9], 8000 kb/s, 29.97 fps, 29.97 \
     tbr, 90k tbn, 59.94 tbc

     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:3[0x20]: Subtitle: dvd_subtitle
     Stream #0:4[0x21]: Subtitle: dvd_subtitle
     Stream #0:5[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Output #0, matroska, to 'crepusculo.mkv':
   Metadata:
     encoder         : Lavf57.71.100
     Stream #0:0: Video: mpeg2video (Main) (mpg2 / 0x3267706D), \
     yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], q=2-31, 8000 \
     kb/s, 29.97 fps, 29.97 tbr, 1k tbn, 90k tbc

     Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, \
     5.1(side), fltp, 448 kb/s

     Metadata:
       title           : English stereo
     Stream #0:2(eng): Subtitle: dvd_subtitle
     Metadata:
       title           : English
     Stream #0:3(por): Subtitle: dvd_subtitle
     Metadata:
       title           : Português
     Stream #0:4(por): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, \
     5.1(side), fltp, 448 kb/s

     Metadata:
       title           : Português estereo
Stream mapping:
   Stream #0:1 -> #0:0 (copy)
   Stream #0:2 -> #0:1 (copy)
   Stream #0:3 -> #0:2 (copy)
   Stream #0:4 -> #0:3 (copy)
   Stream #0:5 -> #0:4 (copy)
Press [q] to stop, [?] for help
[matroska @ 0xd5a240] Non-monotonous DTS in output stream 0:0; \
previous: 16, current: -33; changing to 16. This may result in \
incorrect timestamps in the output file.

[matroska @ 0xd5a240] Non-monotonous DTS in output stream 0:0; \
previous: 16, current: 0; changing to 16. This may result in \
incorrect timestamps in the output file.

[matroska @ 0xd5a240] Timestamps are unset in a packet for \
stream 0. This is deprecated and will stop working in the \
future. Fix your code to set the timestamps properly

[matroska @ 0xd5a240] Can't write packet with unknown timestamp
av_interleaved_write_frame(): Invalid argument

[matroska @ 0xd5a240] Can't write packet with unknown timestamp
Error writing trailer of crepusculo.mkv: Invalid argument

frame=  305 fps=0.0 q=-1.0 Lsize=     231kB time=00:00:10.07 \
bitrate= 187.4kbits/s speed= 321x

video:6008kB audio:154kB subtitle:0kB other streams:0kB global \
headers:0kB muxing overhead: unknown
Conversion failed!


Second try: I tried to change the container to mp4. The command line
looks like this:


ffmpeg -analyzeduration 500M -probesize 500M -i crepusculo.vob \
-map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 \
-metadata:s:a:0 language=eng -metadata:s:a:0 title="English stereo" \
-metadata:s:a:1 language=por -metadata:s:a:1 title="Português estereo" \
-metadata:s:s:0 language=eng -metadata:s:s:0 title="English" \
-metadata:s:s:1 language=por -metadata:s:s:1 title="Português" \
-codec:v copy -crf 20 -codec:a copy -qscale:a 2 -codec:s copy \
crepusculo.mp4


The command output was:


ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 7.2.0 (GCC)
   configuration: --prefix=/usr --enable-gpl --enable-version3 \
   --enable-nonfree --disable-static --enable-shared --disable-debug \
   --enable-libass --enable-libfdk-aac --enable-libfreetype \
   --enable-libmp3lame --enable-libopus --enable-libtheora \
   --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 \
   --enable-openssl --docdir=/usr/share/doc/ffmpeg-3.3.3

   libavutil      55. 58.100 / 55. 58.100
   libavcodec     57. 89.100 / 57. 89.100
   libavformat    57. 71.100 / 57. 71.100
   libavdevice    57.  6.100 / 57.  6.100
   libavfilter     6. 82.100 /  6. 82.100
   libswscale      4.  6.100 /  4.  6.100
   libswresample   2.  7.100 /  2.  7.100
   libpostproc    54.  5.100 / 54.  5.100
Input #0, mpeg, from 'crepusculo.vob':
   Duration: 00:01:43.71, start: 0.280633, bitrate: 347394 kb/s
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top \
     first), 720x480 [SAR 32:27 DAR 16:9], 8000 kb/s, 29.97 fps, 29.97 \
     tbr, 90k tbn, 59.94 tbc

     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:3[0x20]: Subtitle: dvd_subtitle
     Stream #0:4[0x21]: Subtitle: dvd_subtitle
     Stream #0:5[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
[mp4 @ 0x1079240] track 1: codec frame size is not set
[mp4 @ 0x1079240] track 4: codec frame size is not set
Output #0, mp4, to 'crepusculo.mp4':
   Metadata:
     encoder         : Lavf57.71.100
     Stream #0:0: Video: mpeg2video (Main) (a[0][0][0] / 0x0061), \
     yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], q=2-31, 8000 \
     kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc

     Stream #0:1(eng): Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, \
     5.1(side), fltp, 448 kb/s

     Metadata:
       title           : English stereo
     Stream #0:2(eng): Subtitle: dvd_subtitle ([224][0][0][0] / 0x00E0)
     Metadata:
       title           : English
     Stream #0:3(por): Subtitle: dvd_subtitle ([224][0][0][0] / 0x00E0)
     Metadata:
       title           : Português
     Stream #0:4(por): Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, \
     5.1(side), fltp, 448 kb/s

     Metadata:
       title           : Português estereo
Stream mapping:
   Stream #0:1 -> #0:0 (copy)
   Stream #0:2 -> #0:1 (copy)
   Stream #0:3 -> #0:2 (copy)
   Stream #0:4 -> #0:3 (copy)
   Stream #0:5 -> #0:4 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x1079240] Non-monotonous DTS in output stream 0:0; previous: \
1447, current: -3003; changing to 1448. This may result in incorrect \
timestamps in the output file.

[mp4 @ 0x1079240] Non-monotonous DTS in output stream 0:0; previous: \
1448, current: 0; changing to 1449. This may result in incorrect \
timestamps in the output file.

[mp4 @ 0x1079240] Timestamps are unset in a packet for stream 0. This \
is deprecated and will stop working in the future. Fix your code to \
set the timestamps properly

[mp4 @ 0x1079240] pts has no value
     Last message repeated 648 times
frame= 2722 fps=0.0 q=-1.0 size=   61241kB time=00:01:30.72 \
bitrate=5529.9kbits/s speed= 181x
[mp4 @ 0x1079240] pts has no \
value

     Last message repeated 655 times
frame= 5180 fps=5179 q=-1.0 size=  123840kB time=00:02:52.73 \
bitrate=5873.0kbits/s speed= 173x
[mp4 @ 0x1079240] pts has no \
value

     Last message repeated 503 times
[mp4 @ 0x1079240] Application provided invalid, non monotonically \
increasing dts to muxer in stream 2: 17129112 >= 16543527

av_interleaved_write_frame(): Invalid argument
[mp4 @ 0x1079240] pts has no value
     Last message repeated 79 times
frame= 7070 fps=5123 q=-1.0 Lsize=  179654kB time=00:03:55.81 \
bitrate=6241.0kbits/s speed= 171x

video:174140kB audio:5395kB subtitle:22kB other streams:0kB global \
headers:0kB muxing overhead: 0.054197%
Conversion failed!


What I should do to solve that?

Thank you.

Jamenson Ferreira Espindula de Almeida Melo
GNU/Linux user # 166197
https://linuxcounter.net/cert/166197.png

Key fingerprint:
234D 1914 4224 7C53 BD13  6855 2AE0 25C0 08A8 6180
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Hello Jamenson,

You cannot use cat (Unix utility) to concatenate .VOB files.
You cannot use the FFmpeg concat filter to concatenate ALL of the .VOB files, and you tried to do all of them. (This might work in extremely rare cases, but I doubt it ever does with a realistic DVD.)
The answer from Micael Silva hints at the problem with concatenating everything, but let me go more in depth: 

The video_ts.vob file is not really movie content, it is metadata.
The vts_xx_y.vob files may or may not be movie content, but they VERY often have different stream(s) in them. VTS stands for "Video Title Set". The xx, the 2-digit number, is the title. The feature film is one title (almost always). On your DVD, the feature film is vts_01_y.vob, so it is "title 01". The feature film is usually title 01 or title N, where N is the biggest number used on the disc.
Within a given title, such as vts_01_y.vob (the feature film on your DVD), there are up to 10 VOB files, with y from 0 to 9. The file vts_01_0.vob, with y == 0, may or may not be safe to concatenate with the rest of this title, it may or may not have the same streams. Yours is 320 megabytes, so it might be safe. If it was super small, then it would likely just be a menu.
The VOB files vts_01_y.vob for y from 0 or 1 to as high as it goes (y == 4, for your DVD) can be safely concatenated, and the result will be one title. In your DVD, this one title will be the feature film. vts_02_y.vob, vts_03_y.vob, and the other titles are likely special features, and they cannot be concatenated safely. They likely have different streams, and possibly even different resolution, frame rates, or all kinds of differences that will not fit inside a single MKV file.
SUMMARY: You only want to concatenate VOB files from the same title. The other titles (2 through 5, on your example DVD) are special features or something, they are not the movie itself. You also want to avoid the video_ts.vob file and you may need to avoid the vts_xx_0.vob file. 

More notes:
1. I don't think you can use -codec:v copy -crf 20. It doesn't seem like it should be allowed. -codec:v copy means "don't touch the bytes", but -crf 20 implies you want to use libx264 and you want that quality of output.
2. I don't think you can use -codec:a copy -qscale:a 2 for a similar reason, 'copy' means "don't touch the bytes".
3. You can maybe theoretically use -codec:s copy with the output being a .MKV file, but DVD subtitles are very user-unfriendly in MKV containers. If at all possible, I suggest using WebVTT or SubRip (filename.srt) format subtitles in your MKV file. The subtitles on the DVD are not actually text, they are images. They need to be processed by OCR and then converted into a text-based subtitle format such as WebVTT or SubRip (filename.srt).
4. The MP4 container file can't handle several of those things: It can't handle subtitles in that format, it can't handle audio in that format (edit: actually, it looks like VLC will play an MP4 file with AC-3 audio, but iTunes will not), and it may not be able to handle two full 5.1-channel audio streams, I forget. In fact, MP4 files almost don't handle subtitles at all, they support one format that is weird, if I recall correctly.
5. Depending on your goals, I'm not sure if FFmpeg is what you want to use to convert this DVD into a more user-friendly MKV or MP4 file. I might suggest HandBrake with the GUI interface, I suspect it may do what you want. FFmpeg is utterly impressive, it can do a huge array of things, but the HandBrake GUI application will find the names for the "titles" on the DVD (the feature film, the making of featurette, the deleted scenes), it will ignore vts_01_0.vob if it needs to but keep it if it should, stuff like that. You can select "MP4" from the drop-down menu and then it will tell you "I can't put AC-3 audio in an MP4 container, please use a MKV container or I might I suggest transcoding to AAC". It's not as awesome as FFmpeg, but given the VOB files you have and the MKV or MP4 you want to make, HandBrake can probably do it much less painfully. 

Good luck,

Zak

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