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DVD & chapter stutter

Posted: Wed May 25, 2011 9:42 pm
by spinnybarr
Guys

Love the product, has much simplified the problem challenge around converting my DVD collection and am particularly keen on the mkv format.

However, I have a problem, the mkv's created, have all of the attributes, subtitles, the works, even the chapters.

I have noticed on movies (Bad Company - Region 1) where there is a very clear and obvious stutter on each of the chapter marks.

I've ripped quite a number of DVD's and some are ok, others are not, i'll look to get another few examples, but my guess is that something is up with the interpretation of the chapter markers as it seems that the video/audio pauses and moves back a few frames before continuing as normal.

Edit, the trace below shows that Im running Linux but I've recently switched from XP 32bit and had the same problem (and now face reripping some of 200+ dvds...)

Code: Select all

mkvinfo title03.mkv 
+ EBML head
|+ Doc type: matroska
|+ Doc type version: 2
|+ Doc type read version: 2
+ Segment, size 5503301638
|+ Seek head (subentries will be skipped)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: libmakemkv v1.6.8 (0.7.7/0.8.1) x86_64-linux-gnu
| + Writing application: MakeMKV v1.6.8 linux(x64-release)
| + Duration: 7001.911s (01:56:41.911)
| + Segment UID: 0x16 0x4f 0x4d 0xcf 0xeb 0xe6 0xc8 0x95 0x22 0x6f 0x40 0x91 0x82 0x53 0x9b 0x26
| + Date: Sun May 22 19:23:17 2011 UTC
|+ Segment tracks
| + A track
|  + Track number: 1
|  + Track UID: 1
|  + Track type: video
|  + Enabled: 1
|  + Default flag: 1
|  + Forced flag: 0
|  + Lacing flag: 0
|  + MinCache: 0
|  + Timecode scale: 1
|  + Max BlockAddition ID: 0
|  + Codec ID: V_MPEG2
|  + Codec decode all: 1
|  + CodecPrivate, length 160
|  + Default duration: 33.367ms (29.970 fps for a video track)
|  + Video track
|   + Pixel width: 720
|   + Pixel height: 480
|   + Interlaced: 0
|   + Display height: 480
|   + Display width: 853
|   + Display unit: 0 (pixels)
| + A track
|  + Track number: 2
|  + Track UID: 2
|  + Track type: audio
|  + Enabled: 1
|  + Default flag: 1
|  + Forced flag: 0
|  + Lacing flag: 1
|  + MinCache: 0
|  + Timecode scale: 1
|  + Max BlockAddition ID: 0
|  + Codec ID: A_AC3
|  + Codec decode all: 1
|  + Language: eng
|  + Default duration: 32.000ms (31.250 fps for a video track)
|  + Name: 3/2+1
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 6
| + A track
|  + Track number: 3
|  + Track UID: 3
|  + Track type: subtitles
|  + Enabled: 1
|  + Default flag: 1
|  + Forced flag: 0
|  + Lacing flag: 0
|  + MinCache: 0
|  + Timecode scale: 1
|  + Max BlockAddition ID: 0
|  + Codec ID: S_VOBSUB
|  + Codec decode all: 1
|  + Language: eng
|  + CodecPrivate, length 510
|+ Chapters
| + EditionEntry
|  + EditionFlagHidden: 0
|  + EditionFlagDefault: 1
|  + EditionUID: 717542253
|  + (Unknown element: EBMLVoid; ID: 0xec size: 41)
|  + ChapterAtom
|   + ChapterUID: 2
|   + ChapterTimeStart: 00:00:00.000000000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 01
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 3
|   + ChapterTimeStart: 00:07:38.016066666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 02
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 4
|   + ChapterTimeStart: 00:19:39.433100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 03
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 5
|   + ChapterTimeStart: 00:27:39.096900000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 04
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 6
|   + ChapterTimeStart: 00:35:54.643400000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 05
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 7
|   + ChapterTimeStart: 00:40:17.602733333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 06
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 8
|   + ChapterTimeStart: 00:45:46.971900000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 07
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 9
|   + ChapterTimeStart: 00:49:12.581300000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 08
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 10
|   + ChapterTimeStart: 00:53:38.032766666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 09
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 11
|   + ChapterTimeStart: 01:06:31.541433333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 10
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 12
|   + ChapterTimeStart: 01:15:01.749933333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 11
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 13
|   + ChapterTimeStart: 01:23:42.650600000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 12
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 14
|   + ChapterTimeStart: 01:27:03.214100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 13
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 15
|   + ChapterTimeStart: 01:31:59.052100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 14
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 16
|   + ChapterTimeStart: 01:38:08.484500000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 15
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 17
|   + ChapterTimeStart: 01:47:48.595066666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 16
|    + ChapterLanguage: eng
|+ Cluster
comparing the chapter info from the dvd using chaplin but that just confuses me more as the chapter markers dont match up and its not even as simple as time offsets.

Code: Select all

retrieved using lsdvd -x
Title: 19, Length: 01:56:32.100 Chapters: 17, Cells: 20, Audio streams: 03, Subpictures: 02
	VTS: 12, TTN: 01, FPS: 29.97, Format: NTSC, Aspect ratio: 16/9, Width: 720, Height: 480, DF: Letterbox
	Palette: 664c0a00 51f05a 108080 ea8080 5bbe6a 5bbe6a 5bbe6a ad404d 902236 cd6167 acad4e 8ec337 cc9668 61cfcf 99b8ab d08754 
	Number of Angles: 1
	Audio: 1, Language: en - English, Format: ac3, Frequency: 48000, Quantization: drc, Channels: 6, AP: 0, Content: Undefined, Stream id: 0x80
	Audio: 2, Language: en - English, Format: dts, Frequency: 48000, Quantization: drc, Channels: 6, AP: 0, Content: Undefined, Stream id: 0x89
	Audio: 3, Language: fr - Francais, Format: ac3, Frequency: 48000, Quantization: drc, Channels: 6, AP: 0, Content: Undefined, Stream id: 0x82
	Chapter: 01, Length: 00:07:37.043, Start Cell: 01
	Chapter: 02, Length: 00:12:00.176, Start Cell: 02
	Chapter: 03, Length: 00:07:58.320, Start Cell: 03
	Chapter: 04, Length: 00:08:14.186, Start Cell: 04
	Chapter: 05, Length: 00:04:22.176, Start Cell: 05
	Chapter: 06, Length: 00:05:28.186, Start Cell: 06
	Chapter: 07, Length: 00:03:25.200, Start Cell: 07
	Chapter: 08, Length: 00:04:24.320, Start Cell: 08
	Chapter: 09, Length: 00:12:51.363, Start Cell: 09
	Chapter: 10, Length: 00:08:29.176, Start Cell: 12
	Chapter: 11, Length: 00:08:40.166, Start Cell: 13
	Chapter: 12, Length: 00:03:20.166, Start Cell: 14
	Chapter: 13, Length: 00:04:55.010, Start Cell: 15
	Chapter: 14, Length: 00:06:08.220, Start Cell: 16
	Chapter: 15, Length: 00:09:38.196, Start Cell: 17
	Chapter: 16, Length: 00:08:52.153, Start Cell: 19
	Chapter: 17, Length: 00:00:00.276, Start Cell: 20
	Cell: 01, Length: 00:07:37.043
	Cell: 02, Length: 00:12:00.176
	Cell: 03, Length: 00:07:58.320
	Cell: 04, Length: 00:08:14.186
	Cell: 05, Length: 00:04:22.176
	Cell: 06, Length: 00:05:28.186
	Cell: 07, Length: 00:03:25.200
	Cell: 08, Length: 00:04:24.320
	Cell: 09, Length: 00:00:28.010
	Cell: 10, Length: 00:01:37.300
	Cell: 11, Length: 00:10:46.053
	Cell: 12, Length: 00:08:29.176
	Cell: 13, Length: 00:08:40.166
	Cell: 14, Length: 00:03:20.166
	Cell: 15, Length: 00:04:55.010
	Cell: 16, Length: 00:06:08.220
	Cell: 17, Length: 00:03:51.186
	Cell: 18, Length: 00:05:47.010
	Cell: 19, Length: 00:08:52.153
	Cell: 20, Length: 00:00:00.276
	Subtitle: 01, Language: en - English, Content: Undefined, Stream id: 0x20, 
	Subtitle: 02, Language: es - Espanol, Content: Undefined, Stream id: 0x21, 

Re: DVD & chapter stutter

Posted: Fri May 27, 2011 7:18 am
by twa000
I am sure more experienced people will add their thoughts, but you don't specify your PC hardware/software config.
In my limited experience, stuttering is either a bandwidth issue or a processor/software limitation/bottleneck.
My normal system is an HDI Dune linked to NAS boxes, and I originally saw stuttering originally due to problems on ethernet connectivity and the Dune firmware.
I also periodically check out the mkv movies on my PC (Win 7 64bit 3 GB RAM), before transferring to the NAS and have never seen issues.

Certainly if I can transfer mkv's from one end of the house to the other end by ethernet, you should not be getting issues on a suitably configured PC.

I think we need more config information.

Re: DVD & chapter stutter

Posted: Sat May 28, 2011 10:52 am
by spinnybarr
thanks for the reply

Running on a Xeon quad (W3580) on 12gb mem running ubuntu 64bit (11.04)

Just to be specific, this is not actually around playback or streaming, this is actually to do with the ripping process itself.

I am able to play the feature back perfectly well on the DVD (Bad Company in this example) but when I rip this using makemkv to local disk then the stutter happens.

Re: DVD & chapter stutter

Posted: Tue May 31, 2011 12:03 am
by Romansh
spinnybarr wrote:I am able to play the feature back perfectly well on the DVD (Bad Company in this example) but when I rip this using makemkv to local disk then the stutter happens.
With which player? Have you tried other players?

Re: DVD & chapter stutter

Posted: Tue May 31, 2011 12:09 am
by spinnybarr
Using vlc and ubuntu shipped movie player i can observe the stutter, always in the same spot.

I also use a WDTV and this exhibits exactly the same behaviour.

I have just noticed that vlc actually has a problem playing back the DVD on that specific point in the movie where the ubuntu movie player works perfectly with no noticable pause.

Re: DVD & chapter stutter

Posted: Sun Jun 05, 2011 9:51 pm
by spinnybarr
I have rechecked the information in the chapters, and I'm not convinced that it is a chapter problem per-se but it appears to be some kind of timing issue for sure.

According to lsdvd, chapter 4 should start at 00:35:49, where the makemkv output suggests that chapter 6 should start at 00:35:54 (which is where the stutter happens near as I can make it).

I think there may be a different bug on the calculation on the number of chapters in the movie also.

I have several hundred dvd's lined up to rip so I can put them away and let them gather dust but this is driving me bananas.

I'd really love to help and since Im using a linux workstation, if you have code suggestions or debugging line items to insert then please let me know

Mny thanks

Re: DVD & chapter stutter

Posted: Mon Jun 06, 2011 11:33 am
by mike admin
Chapters on DVD are position-based (as in "start of cell #5"), they point to specific offset in VOB; so all timings displayed by lsdvd are values taken from IFO files which are sort of informational and may or may not be accurate. Since chapters in MKV file are time-based, MakeMKV calculates an exact time of the frame located at specific position in VOB file. It's not uncommon for timings to be a bit off.

For the shutter, it's very likely an issue with layer break when two parts of the movie are encoded with different settings. My only guess is that's a specific combination of container/player that shows the issue or not. Your only practical choice for this disc is to reencode it with handbrake.

Re: DVD & chapter stutter

Posted: Mon Jun 06, 2011 12:48 pm
by spinnybarr
Hi Mike

Thanks for the reply, I can appreciate that it is difficult to diagnose without the actual raw data.

It also happens that it stutters at every chapter marker, not just the example I had picked out, is that consistent with layer switches? Is it likely that the dvd would be mastered to switch between layers at each chapter?

It appears to me that both the audio and video pause and whether its my eyes or not, it appears that the video takes a slight step back.

Is there an option where it could detect when the audio timing is inconsistent with a view to closing the gap?

My problem is that this is happening to so many of the movies I have already converted to mkv with your program and then compressed with handbrake.

Offer still stands if you want me to try out any additional diagnostics/debugging on linux.

Re: DVD & chapter stutter

Posted: Fri Jun 10, 2011 1:22 pm
by mike admin
spinnybarr wrote:It also happens that it stutters at every chapter marker, not just the example I had picked out, is that consistent with layer switches? Is it likely that the dvd would be mastered to switch between layers at each chapter?
This is very unlikely. To valideate one would need to look at ISO file.
spinnybarr wrote: My problem is that this is happening to so many of the movies I have already converted to mkv with your program and then compressed with handbrake.
Are you saying that you see the same problem after recompression with handbrake?

There is one simple test - please demux an MKV file with mkvextract or tsmuxer and then make an MKV file out of demuxed streams with mmg. Will you see any shutter in this case?

Re: DVD & chapter stutter

Posted: Sun Jun 12, 2011 8:27 pm
by spinnybarr
Mike, have to say, you are a bit of a genius!

Yes, I was experiencing this from the MakeMKV and handbrake files, both exhibited the same behaviour.

I took the MKV generated from MakeMKV, demuxed with mkvextract and then merged again with mmg.

The only output I got from mmg was:
Warning: Found one or more B frames without second reference in the first GOP. You may want to fix the MPEG2 video stream or use smart reencode before attempting to multiplex it.
I selected just the video and audio track and smooth as anything, no stutter.

Interestingly, the comparison of the original vs demux/remux output is different

Original (reripped with 1.6.10)

Code: Select all

+ EBML head
|+ EBML version: 1
|+ EBML read version: 1
|+ EBML maximum ID length: 4
|+ EBML maximum size length: 8
|+ Doc type: matroska
|+ Doc type version: 2
|+ Doc type read version: 2
+ Segment, size 5501894035
|+ Seek head (subentries will be skipped)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: libmakemkv v1.6.10 (1.2.0/1.1.0) x86_64-linux-gnu
| + Writing application: MakeMKV v1.6.10 linux(x64-release)
| + Duration: 7001.911s (01:56:41.911)
| + Segment UID: 0x57 0xa0 0x01 0x2e 0x0f 0xf5 0xc8 0x70 0x05 0x11 0x74 0xe0 0x19 0x3e 0xac 0x64
| + Date: Sun May 29 23:34:37 2011 UTC
|+ Segment tracks
| + A track
|  + Track number: 1
|  + Track UID: 1
|  + Track type: video
|  + Lacing flag: 0
|  + Codec ID: V_MPEG2
|  + CodecPrivate, length 160
|  + Default duration: 33.367ms (29.970 fps for a video track)
|  + Video track
|   + Pixel width: 720
|   + Pixel height: 480
|   + Display height: 480
|   + Display width: 853
| + A track
|  + Track number: 2
|  + Track UID: 2
|  + Track type: audio
|  + Codec ID: A_AC3
|  + Default duration: 32.000ms (31.250 fps for a video track)
|  + Name: 3/2+1
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 6
| + A track
|  + Track number: 3
|  + Track UID: 3
|  + Track type: subtitles
|  + Lacing flag: 0
|  + Codec ID: S_VOBSUB
|  + CodecPrivate, length 511
|+ Chapters
| + EditionEntry
|  + EditionFlagHidden: 0
|  + EditionFlagDefault: 1
|  + EditionUID: 1321748924
|  + (Unknown element: EBMLVoid; ID: 0xec size: 41)
|  + ChapterAtom
|   + ChapterUID: 2
|   + ChapterTimeStart: 00:00:00.000000000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 01
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 3
|   + ChapterTimeStart: 00:07:38.016066666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 02
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 4
|   + ChapterTimeStart: 00:19:39.433100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 03
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 5
|   + ChapterTimeStart: 00:27:39.096900000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 04
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 6
|   + ChapterTimeStart: 00:35:54.643400000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 05
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 7
|   + ChapterTimeStart: 00:40:17.602733333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 06
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 8
|   + ChapterTimeStart: 00:45:46.971900000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 07
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 9
|   + ChapterTimeStart: 00:49:12.581300000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 08
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 10
|   + ChapterTimeStart: 00:53:38.032766666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 09
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 11
|   + ChapterTimeStart: 01:06:31.541433333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 10
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 12
|   + ChapterTimeStart: 01:15:01.749933333
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 11
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 13
|   + ChapterTimeStart: 01:23:42.650600000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 12
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 14
|   + ChapterTimeStart: 01:27:03.214100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 13
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 15
|   + ChapterTimeStart: 01:31:59.052100000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 14
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 16
|   + ChapterTimeStart: 01:38:08.484500000
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 15
|    + ChapterLanguage: eng
|  + ChapterAtom
|   + ChapterUID: 17
|   + ChapterTimeStart: 01:47:48.595066666
|   + ChapterFlagHidden: 0
|   + ChapterFlagEnabled: 1
|   + ChapterDisplay
|    + ChapterString: Chapter 16
|    + ChapterLanguage: eng
|+ Cluster
Demux / Muxed

Code: Select all

+ EBML head
|+ EBML version: 1
|+ EBML read version: 1
|+ EBML maximum ID length: 4
|+ EBML maximum size length: 8
|+ Doc type: matroska
|+ Doc type version: 2
|+ Doc type read version: 2
|+ Segment, size 5500566851  <-- orig is + Segment, size 5501894035
|+ Seek head (subentries will be skipped)
|+ EbmlVoid (size: 4043)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: libebml v1.2.0 + libmatroska v1.1.0
| + Writing application: mkvmerge v4.5.0 ('Speed of Light') built on Feb 23 2011 01:17:16
| + Duration: 6998.474s (01:56:38.474) <-- orig is | + Duration: 7001.911s (01:56:41.911)
| + Date: Sun Jun 12 20:13:24 2011 UTC
| + Segment UID: 0xd2 0xe2 0x7b 0x3f 0x34 0xc4 0x4d 0xa8 0x01 0xf5 0x09 0xf1 0xb9 0xfe 0x9e 0x00
|+ Segment tracks
| + A track
|  + Track number: 1
|  + Track UID: 863359884
|  + Track type: video
|  + Lacing flag: 0
|  + MinCache: 2
|  + Codec ID: V_MPEG2
|  + Default duration: 16.683ms (59.940 fps for a video track) <-- orig is |  + Default duration: 33.367ms (29.970 fps for a video track)
|  + Language: und
|  + Video track
|   + Pixel width: 720
|   + Pixel height: 480
|   + Interlaced: 1
|   + Display width: 853
|   + Display height: 480
|  + CodecPrivate, length 160
| + A track
|  + Track number: 2
|  + Track UID: 3631064992
|  + Track type: audio
|  + Codec ID: A_AC3
|  + Default duration: 32.000ms (31.250 fps for a video track)
|  + Language: und
|  + Audio track
|   + Sampling frequency: 48000
|   + Channels: 6
|  + Content encodings
|   + Content encoding
|    + Content compression
|     + Algorithm: 3 (header removal)
|     + Settings: length 2, data:  0x0b 0x77
| + A track
|  + Track number: 3
|  + Track UID: 1592732987
|  + Track type: subtitles
|  + Lacing flag: 0
|  + Codec ID: S_VOBSUB
|  + CodecPrivate, length 258
|  + Content encodings
|   + Content encoding
|    + Content compression
|+ EbmlVoid (size: 980)
|+ Cluster