Double runtime?

[rw1954]

I'm trying to compile a DVD using DVD Lab Studio, and every time I remux the files the runtime doubles. The audio is fine, but the video is choppy and basically runs at half speed. What could be causing that, and how can I fix it?

[ProWo]

Post a mediainfo report of both files (video+audio, if separated) here.

[rw1954]

I downloaded and installed that program, and I opened the first file, but the program is not very intuitive, and I have no idea what to do next. Is there some information in particular you were interested in?

[jagabo]

Drag/Drop your video onto MediaInfo. Set View -> Text (if not already). Copy (Ctrl+C) / Paste (Ctrl+V) the text to a post here.

Also, MediaInfo probably set up a Shell command. You should be able to right click on a video and select MediaInfo from the context menu.

[rw1954]

Thanks for the help. I hope I did it right.

The original file is an MPG created with Video Redo, and it seems fine.

MPG file before compiling:
(Video Redo and DVD Lab both report runtime as 2:27)

General
Complete name : F:\DVD\4 - Projects\Dexter\Dex 1a ready.mpg
Format : MPEG-PS
File size : 4.63 GiB
Duration : 2 h 27 min
Overall bit rate mode : Variable
Overall bit rate : 4 484 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 : Variable
Format settings, picture structure : Frame
Duration : 2 h 27 min
Bit rate mode : Variable
Bit rate : 4 139 kb/s
Maximum bit rate : 5 000 kb/s
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 2.40:1
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
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) : 0.400
Time code of first frame : 00:00:00;00
Time code source : Group of pictures header
GOP, Open/Closed : Closed
Stream size : 4.28 GiB (92%)
Color primaries : BT.601 NTSC
Transfer characteristics : BT.601
Matrix coefficients : BT.601

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 2 h 27 min
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 271 MiB (6%)

Text
ID : 224 (0xE0)-CC3
Format : EIA-608
Muxing mode, more info : Muxed in Video #1
Duration : 2 h 27 min
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
CaptionServiceName : CC3


After DVD Lab Studio compiles the video, the resulting VOB files are out of synch, audio is normal, but video plays 1 sec, pauses 1 sec, repeatedly

VOB file after compiling:
(DVD Shrink reports full runtime as 4:52)

NOTE: This text is for VTS-01-1 (first segment) only

General
Complete name : F:\DVD\Dexter 1a compiled\VIDEO_TS\VTS_01_1.VOB
Format : MPEG-PS
File size : 1 023 MiB
Duration : 54 min 51 s
Overall bit rate mode : Variable
Overall bit rate : 2 607 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 : Variable
Duration : 54 min 51 s
Bit rate mode : Variable
Bit rate : 2 299 kb/s
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 2.40:1
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.222
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Closed
Stream size : 902 MiB (88%)
Color primaries : BT.601 NTSC
Transfer characteristics : BT.601
Matrix coefficients : BT.601

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 54 min 51 s
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 100 MiB (10%)

Text
ID : 224 (0xE0)-CC3
Format : EIA-608
Muxing mode, more info : Muxed in Video #1
Duration : 54 min 51 s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
CaptionServiceName : CC3

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[davexnet]

Can you provide the log from DVD Lab and post it here

Are you using double layer DVD's? Because the source looks like it's too big @ 4.63 GB

[hech54]

Is the original "DVD" from a DVD Recorder? Sometimes they author DVDs that point to the material twice.

[rw1954]

I would be happy to provide the "log" from DVD Lab, but I don't what it is or how to obtain it. The original files were not recorded, they were ripped from the commercial DVD using DVD Shrink in "reauthor" mode. The file seemed fine until I tried to compile it. I only use single-layer discs. I should also add that I've made over a hundred DVD compilations, and this never happened before. I was looking at the Mediainfo report, and I noticed that the bitrate changed during the compilation process. In fact it was cut in half, so I'm wondering if that has something to do with it. If so, how can I fix that? If not, what should I do next?

[davexnet]

What is your source from dvd shrink? Mpeg file?
Try Avstodvd instead of dvd-lab. If the source is already compliant, it will not re-encode it, just pass it to the authoring stage (muxman)

[rw1954]

Ripping with DVD Shrink creates VOB files. After I ripped the episodes I wanted, I joined them with Video Redo into a single MPG file. Then I compiled the MPG using DVD Lab, which converted it back to VOB files, ready for shrinking and burning. I've done this dozens of times, but this time the resulting VOB files are twice as big, the synch is off, the video stutters, and the bit rate is halved. I can't figure out why the process didn't work this time. Apparently the reduced bit rate causes the video to play, then freeze, then play, then freeze, doubling its runtime, but what causes the bitrate to change? I tried compiling the material without demuxing, but that created audio errors. Before I try a different program, I'd like to understand what's happening here and why. Any ideas?

[davexnet]

No because I'm not familiar with DVD-Lab at all. I installed it and I'm taking a look - if I spot anything
I'll add to the thread.

The bitrate is average. Unlikely the rate of any single VOB will match the source file.


You need somebody familiar with the quirks of this program to help you

Try this suggestion
http://forum.doom9.org/showthread.php?p=516162#post516162

[ProWo]

Ripping with DVD Shrink creates VOB files. After I ripped the episodes I wanted, I joined them with Video Redo into a single MPG file.

Maybe the single episodes are different. Post a mediainfo report from each single episode here.