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rsa4046
l33t
Joined: 07 Feb 2005
Posts: 660
Location: The Big H, a bit SSW
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 Posted: Sun Jan 07, 2007 10:44 pm Post subject: dvdauthor fails on mpg file, why? [SOLVED] |
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I extracted the title from a DVD (no longer have the original) using mplayer -dumpstream, giving me a single 5.4 GB .vob file which plays perfectly using mplayer, xine, etc. After wasting much time due to A/V sync problems tried to shrink this file using mplex, I instead used vamps to produce a smaller (4344981504 byte) .mpg file. The audio and video streams of this file are in sync, and the file again plays pefectly in xine, mplayer, etc. In order to burn this back to a single layer DVD, I tried dvdauthor, using the following .xml | Code: | <dvdauthor>
<vmgm />
<titleset>
<titles>
<pgc>
<vob file="new.mpg"/>
</pgc>
</titles>
</titleset>
</dvdauthor> |
with the following unhappy result: | Code: | $ mkdir dvd
$ dvdauthor -o dvd -x dvd.xml
DVDAuthor::dvdauthor, version 0.6.11.
Build options: gnugetopt magick iconv freetype
Send bugs to <dvdauthor-users@lists.sourceforge.net>
INFO: Locale=en_US.utf8
INFO: Converting filenames to UTF-8
INFO: dvdauthor creating VTS
STAT: Picking VTS 01
STAT: Processing new.mpg...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
WARN: Skipping sector, waiting for first VOBU...
ERR: SCR moves backwards, remultiplex input. |
I don't seem to be able to get around this error, does anyone know why, and can anyone suggest a solution?
_________________
I love gentoo, but I am certainly no guru, despite what it says above.
Last edited by rsa4046 on Mon Jan 08, 2007 6:14 am; edited 1 time in total |
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rsa4046
l33t
Joined: 07 Feb 2005
Posts: 660
Location: The Big H, a bit SSW
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| Posted: Mon Jan 08, 2007 6:11 am Post subject: |
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OK, figured it out. Ended up demuxing and remuxing as described many times elsewhere in these forms, but thought I would log what I did, as following the innumerable threads is confusing. In my case, all I wanted to do was burn a single DVD title from an extant VOB, ripped previously using mplayer -dumpstream (~/video/source.vob, size = 5632798720 b). Here's the log of what I did | Code: | # first recover the video and audio streams
$ mplayer ~/video/source.vob -dumpvideo -dumpfile video.m2v
MPlayer 1.0rc1-4.1.1 (C) 2000-2006 MPlayer Team
CPU: Dual Core AMD Opteron(tm) Processor 265 (Family: 15, Model: 33, Stepping: 2)
MMX2 supported but disabled
3DNow supported but disabled
3DNowExt supported but disabled
CPUflags: MMX: 1 MMX2: 0 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Playing ~/video/source.vob.
MPEG-PS file format detected.
Core dumped ;)
Exiting... (End of file)
$ mplayer ~/video/source.vob -dumpaudio -dumpfile audio.ac3
<snip> |
The next part required some trial and error, as the initial trials at remux produced a significant loss of A/V synchronization, which, from reading numerous post, is not unexpected. To get a value for the time correction for resynchronizing the streams required repeating the following step a few times, making an initial guess as to the necessary correction (given in milliseconds) and finally converging on the correct value of 2 seconds (-O 2000): | Code: | $ mplex -f 8 -o sync-%d.mpg -O -2000 video.m2v audio.ac3
INFO: [mplex] mplex version 1.8.0 (2.2.4 $Date: 2005/08/28 17:50:54 $)
INFO: [mplex] File video.m2v looks like an MPEG Video stream.
INFO: [mplex] File audio.ac3 looks like a dts Audio stream.
INFO: [mplex] Video stream 0: profile 8 selected - ignoring non-standard options!
INFO: [mplex] Found 1 audio streams and 1 video streams
INFO: [mplex] Selecting dvdauthor DVD output profile
INFO: [mplex] Multiplexing video program stream!
INFO: [mplex] Scanning for header info: Video stream e0 (video.m2v)
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width : 720
INFO: [mplex] Frame height : 480
INFO: [mplex] Aspect ratio : 16:9 display
INFO: [mplex] Picture rate : 29.970 frames/sec
INFO: [mplex] Bit rate : 8000000 bits/sec
INFO: [mplex] Vbv buffer size : 229376 bytes
INFO: [mplex] CSPF : 0
INFO: [mplex] Scanning for header info: dts Audio stream 00 (audio.ac3)
INFO: [mplex] dts frame size = 1006
INFO: [mplex] dts AUDIO STREAM:
INFO: [mplex] Bit rate : 98304 bytes/sec (768 kbit/sec)
INFO: [mplex] Frequency : 48000 Hz
INFO: [mplex] SYSTEMS/PROGRAM stream:
INFO: [mplex] rough-guess multiplexed stream data rate : 8967800
INFO: [mplex] target data-rate specified : 10080000
INFO: [mplex] Setting specified specified data rate: 10080000
INFO: [mplex] Run-in Sectors = 89 Video delay = 13019 Audio delay = 196022
INFO: [mplex] New sequence commences...
INFO: [mplex] Video e0: buf= 0 frame=000000 sector=00000000
INFO: [mplex] Audio bd: buf= 0 frame=000000 sector=00000000
INFO: [mplex] Scanned to end AU 16
....
<snip>
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In my case I was lucky, as mplex produced 6 files (sync-1.mpg, sync-2.mpg, ..., sync-6.mpg) with a total size of 4596903936 bytes, i.e., just small enough to fit on a single-layer disk (otherwise I would have had to have done something like | Code: | | $ tcrequant -i video.m2v -o video-requant.m2v -f $FACTOR |
to reduce the size).
In order to get dvdauthor to work, rather than combine these mpegs files into one large one as described elsewhere, I just made the dvd.xml for dvdauthor to reflect this outcome, as one chapter from multiple source files:
| Code: | $ cat dvd.xml
<dvdauthor>
<vmgm />
<titleset>
<titles>
<pgc>
<vob file="sync-1.mpg" chapters="0"/>
<vob file="sync-2.mpg" />
<vob file="sync-3.mpg" />
<vob file="sync-4.mpg" />
<vob file="sync-5.mpg" />
<vob file="sync-6.mpg" />
</pgc>
</titles>
</titleset>
</dvdauthor>
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With that done, I just made a folder to hold the results and ran dvdauthor: | Code: |
$ mkdir DVD
$ dvdauthor -o DVD -x dvd.xml
DVDAuthor::dvdauthor, version 0.6.11.
Build options: gnugetopt magick iconv freetype
Send bugs to <dvdauthor-users@lists.sourceforge.net>
INFO: Locale=en_US.utf8
INFO: Converting filenames to UTF-8
INFO: dvdauthor creating VTS
STAT: Picking VTS 01
STAT: Processing sync-1.mpg...
INFO: Video pts = 0.178 .. 0.745
STAT: Processing sync-2.mpg...
INFO: Video pts = 0.178 .. 1.179
INFO: Audio[24] pts = 1.610 .. 1.760
STAT: Processing sync-3.mpg...
INFO: Video pts = 0.178 .. 0.745
STAT: Processing sync-4.mpg...
STAT: VOBU 6103 at 2180MB, 1 PGCS
INFO: Video pts = 0.178 .. 2928.436
INFO: Audio[24] pts = 0.213 .. 2928.426
STAT: Processing sync-5.mpg...
STAT: VOBU 12301 at 4381MB, 1 PGCS
INFO: Video pts = 0.194 .. 2954.179
INFO: Audio[24] pts = 0.195 .. 2953.965
STAT: Processing sync-6.mpg...
<snip> |
After testing the resulting AUDIO_TS/VIDEO_TS structure using mplayer: | Code: |
$ mplayer dvd://1 -dvd-device DVD |
then I made the iso and burned the dvd | Code: | $ mkisofs -R -o dvd.iso DVD
$ growisofs -dvd-compat -Z /dev/dvd=dvd.iso |
Done!  Hope this helps somebody--
_________________
I love gentoo, but I am certainly no guru, despite what it says above. |
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