There are two DVDs that I'd like to combine and preferebly without re-encoding.
They seem to both be PAL, same FPS, same resolution, etc. only they won't truly merge.
That is, TMPGenc CAN do it, if I set it to "link clips", but then it wants to re-encode one of them.
Now, if that's the way it is, OK, I'll live.
But I am curious what the cause is though.
Can anyone shed light?
This is source 1:
And this is 2:General
Complete name : VTS_01_1.VOB
Format : MPEG-PS
File size : 90.5 MiB
Duration : 2 min 33 s
Overall bit rate mode : Variable
Overall bit rate : 4 948 kb/s
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings : BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=15
Format settings, picture structure : Frame
Duration : 2 min 33 s
Bit rate mode : Variable
Bit rate : 4 466 kb/s
Maximum bit rate : 8 250 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 FPS
Standard : PAL
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) : 0.431
Time code of first frame : 01:46:50:20
Time code source : Group of pictures header
GOP, Open/Closed : Closed
Stream size : 81.7 MiB (90%)
Audio #1
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : DVD-Video
Duration : 2 min 33 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Delay relative to video : -144 ms
Stream size : 3.51 MiB (4%)
Service kind : Complete Main
Audio #2
ID : 189 (0xBD)-129 (0x81)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : DVD-Video
Duration : 2 min 33 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Delay relative to video : -144 ms
Stream size : 3.51 MiB (4%)
Service kind : Complete Main
Menu
My only guess is, that it could be the GOP? (It's not the different number of audio tracks, I ruled that out.)General
Complete name : VTS_01_1.VOB
Format : MPEG-PS
File size : 222 MiB
Duration : 4 min 8 s
Overall bit rate mode : Variable
Overall bit rate : 7 517 kb/s
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings : BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=12
Format settings, picture structure : Frame
Duration : 4 min 8 s
Bit rate mode : Variable
Bit rate : 6 983 kb/s
Maximum bit rate : 8 000 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 4:3
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Bottom Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.674
Time code of first frame : 00:08:15:09
Time code source : Group of pictures header
GOP, Open/Closed : Closed
Stream size : 207 MiB (93%)
Audio #1
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : DVD-Video
Duration : 4 min 8 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Delay relative to video : -160 ms
Stream size : 5.68 MiB (3%)
Service kind : Complete Main
Audio #2
ID : 189 (0xBD)-129 (0x81)
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : DVD-Video
Duration : 4 min 8 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Delay relative to video : -160 ms
Stream size : 5.68 MiB (3%)
Service kind : Complete Main
Menu
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This is nøt å signåture.™
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Try demuxing to elementary streams, appending the elementary streams, then muxing back to VOB.
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If you want to make a new DVD just put them in two different titlesets and make the second one play after the first.
If you want to have one large MPG or VOB file for PC playback try as jagabo suggested.
Mixed field order is no problem in MPEG2 as every GOP has a sequence header which contains the TFF=true/false flag and thus it may change at GOP boundaries. Not sure if mixing within the same file (titleset) is DVD compliant, probably not. -
This is nøt å signåture.™
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VOB files aren't meant to be interpreted alone. The IFO files can contain important instructions on what frames to use/skip etc. The most foolproof method is to use VOB2MPG to parse the DVD files (IFO, BUP, VOB) and save the result as MPG file(s). Then work with those MPG files.
But sometimes you can work with the VOB files alone. I would use ffmpeg to demux, append, and mux. Here's a script that will append video1.vob and video2.vob to a new VOB called new.vob:
Code:REM demux the two source files: ffmpeg -i source1.vob -c copy source1.m2v -c copy source1.ac3 ffmpeg -i source2.vob -c copy source2.m2v -c copy source2.ac3 REM build lists for concat: echo file 'source1.m2v' >vid.txt echo file 'source2.m2v' >>vid.txt echo file 'source1.ac3' >aud.txt echo file 'source2.ac3' >>aud.txt REM concat video and audio streams ffmpeg -y -f concat -safe 0 -i vid.txt -c copy new.m2v ffmpeg -y -f concat -safe 0 -i aud.txt -c copy new.ac3 REM mux new video and audio streams: ffmpeg -r 25 -fflags +genpts -i new.m2v -i new.ac3 -c copy new.vob REM delete temp files: del source1.m2v del source1.ac3 del source2.m2v del source2.ac3 del vid.txt del aud.txt del new.m2v del new.ac3
Code:"C:\Program Files\ffmpeg\bin\ffmpeg.exe" -i source1.vob -c copy source1.m2v -c copy source1.ac3
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This is nøt å signåture.™
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Did you try jagabo's ffmpeg script?
Another way of combining (or how I would do it) is to demux using whatever does the job and then use Cuttermaran to join the elementary streams.Last edited by Skiller; 15th Dec 2021 at 08:58. Reason: typo
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gop problem m3n15 vs m3n12. not the same in any way. re-encoded both with the same encoder/settings. then combine.
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"a lot of people are better dead" - prisoner KSC2-303 -
GOP structures (length and P-B frame pattern) don't need to match... Actually, even each single GOP may have a different length and structure and it wouldn't matter.
The first file limits GOP length to 15 frames, which is the maximum for PAL DVD, and the second only uses 12 frames maximum.
I'm more worried about one being top field first and the other bottom field first. -
None are.
A VOB is a Video OBjects file, part of the DVD-Video structure. It's not a video file, it's a structure file with video.
These files can almost never simply be used as-is, be it an NLE, or sometimes even playback.
Very rarely it is possible, but only from certain very basic home DVD recorders.
Originally Posted by SkillerWant my help? Ask here! (not via PM!)
FAQs: Best Blank Discs • Best TBCs • Best VCRs for capture • Restore VHS -
@OP
You could try clever FFmpeg-GUI.
Load your first vob, click main, click multiplex, set ts as container, click multiplex.
If done, click change source file, click source file, select your second vob. Then multiplex it to ts container like above.
If done, click change source file, click source file, select the first converted ts file.
Click add file and add the second converted ts.
Then click join.
Done.
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