VOB audio problems (sometimes)

[depaus]

Hello,

Some of my VOB files have stuttering (drops) in the audio, and some have not. I've googled quite a while, but did not find an answer, so maybe there's someone who could help me. I've recently upgrade from PS3MS to the latest UMS, the PS3MS had the same problems.

VOB info details from a file that gives problem and VOB info details from a file that plays well are attached. Has it something to do with the fps?

Thanks in advance!

AudioProblemVOBInfo.jpg (151.49 KiB) Viewed 9334 times

[Nadahar]

You should download MediaInfo to get some more information about the files. VLC doesn't show that much. Please note that the link I gave you is without a Windows installer. The reason is that the MediaInfo installer has adware in it that will be installed if you're not careful.

Also, following the red text above and "capture" playback of one of the troublesome files might be of help.

[depaus]

Thanks for the quick response

Hereby the info from MediaInfo

And what do you exactly mean with 'capture playback'?

[Nadahar]

Select view "text" or "tree" in MediaInfo to get full info. If you choose "text", you can easily paste the text here without having to do screenshots.

By "capturing" I mean to generate trace logs (as described in red above) while trying to play one of the files with issues, and then post the results here.

[depaus]

Thanks again,

I've attached a trace log in the original post, or isn't that one good?

In text, first the info of the problem vob:

General
Complete name : F:\VIDEO_TS\VTS_01_1.VOB
Format : MPEG-PS
File size : 1 024 MiB
Duration : 30mn 47s
Overall bit rate mode : Variable
Overall bit rate : 4 650 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : Variable
Duration : 30mn 47s
Bit rate mode : Variable
Bit rate : 4 109 Kbps
Maximum bit rate : 8 166 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 (24000/1001) fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Scan order : 2:3 Pulldown
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.496
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 905 MiB (88%)
Color primaries : BT.601 NTSC
Transfer characteristics : BT.601
Matrix coefficients : BT.601

Audio
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Muxing mode : DVD-Video
Duration : 30mn 46s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 spf)
Compression mode : Lossy
Stream size : 98.6 MiB (10%)

Text #1
ID : 189 (0xBD)-32 (0x20)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #2
ID : 189 (0xBD)-33 (0x21)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #3
ID : 189 (0xBD)-34 (0x22)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #4
ID : 189 (0xBD)-35 (0x23)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Menu


And of the good VOB:



General
Complete name : G:\VIDEO_TS\VTS_01_1.VOB
Format : MPEG-PS
File size : 1 024 MiB
Duration : 37mn 44s
Overall bit rate mode : Variable
Overall bit rate : 3 793 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : Variable
Duration : 37mn 44s
Bit rate mode : Variable
Bit rate : 3 269 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.315
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
Stream size : 883 MiB (86%)

Audio
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Muxing mode : DVD-Video
Duration : 37mn 43s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 31.250 fps (1536 spf)
Compression mode : Lossy
Delay relative to video : 600ms
Stream size : 121 MiB (12%)

Text #1
ID : 189 (0xBD)-41 (0x29)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video
Duration : 37mn 41s
Delay relative to video : 3s 280ms

Text #2
ID : 189 (0xBD)-42 (0x2A)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video
Duration : 37mn 36s
Delay relative to video : 5s 640ms

Text #3
ID : 189 (0xBD)-43 (0x2B)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video
Duration : 37mn 36s
Delay relative to video : 5s 640ms

Text #4
ID : 189 (0xBD)-44 (0x2C)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video
Duration : 37mn 36s
Delay relative to video : 5s 640ms

Text #5
ID : 189 (0xBD)-32 (0x20)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #6
ID : 189 (0xBD)-33 (0x21)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #7
ID : 189 (0xBD)-34 (0x22)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #8
ID : 189 (0xBD)-35 (0x23)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #9
ID : 189 (0xBD)-36 (0x24)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #10
ID : 189 (0xBD)-37 (0x25)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #11
ID : 189 (0xBD)-38 (0x26)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #12
ID : 189 (0xBD)-39 (0x27)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Text #13
ID : 189 (0xBD)-40 (0x28)
Format : RLE
Format/Info : Run-length encoding
Muxing mode : DVD-Video

Menu

[Nadahar]

Thanks again,

I've attached a trace log in the original post, or isn't that one good?

Yes, I just didn't see it between the images.

[Nadahar]

The only "obvious" difference I can see is that the trouble file is NTSC while the other is PAL. That means different framerate and resolution. I know virtually nothing about this, so somebody else should try to help, but you could check if the same is true for the other problem VOBs - if they are NTSC.

[depaus]

I will check it, and let you know...

Thanks again so far

[depaus]

I've tested 9 vob files, and 3 of them had audio problems. According to MediaInfo those 3 have no standard, like below...

(the 6 vob working are PAL...)

Any Idea's?

Thanks in advance

Code: Select all

General
Complete name                            : F:\VIDEO_TS\VTS_01_1.VOB
Format                                   : MPEG-PS
File size                                : 1 024 MiB
Duration                                 : 26mn 8s
Overall bit rate mode                    : Variable
Overall bit rate                         : 5 477 Kbps

Video
ID                                       : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Default
Format settings, GOP                     : M=3, N=12
Duration                                 : 26mn 8s
Bit rate mode                            : Variable
Bit rate                                 : 4 920 Kbps
Maximum bit rate                         : 9 360 Kbps
Width                                    : 720 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 16:9
Frame rate                               : 23.976 (24000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Scan order                               : 2:3 Pulldown
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.594
Time code of first frame                 : 00:00:00;00
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
Stream size                              : 920 MiB (90%)

Audio
ID                                       : 189 (0xBD)-128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Mode extension                           : CM (complete main)
Format settings, Endianness              : Big
Muxing mode                              : DVD-Video
Duration                                 : 26mn 8s
Bit rate mode                            : Constant
Bit rate                                 : 448 Kbps
Channel(s)                               : 6 channels
Channel positions                        : Front: L C R, Side: L R, LFE
Sampling rate                            : 48.0 KHz
Frame rate                               : 31.250 fps (1536 spf)
Compression mode                         : Lossy
Stream size                              : 83.7 MiB (8%)

Text
ID                                       : 189 (0xBD)-32 (0x20)
Format                                   : RLE
Format/Info                              : Run-length encoding
Muxing mode                              : DVD-Video
Duration                                 : 25mn 59s
Delay relative to video                  : 6s 546ms

Menu

[depaus]

After being pointed to probably related NTSC problems, I googled and found the following expert setting for Mencoder

container == vob :: -ofps 23.976 -noass
ncontainer == iso :: -ofps 23.976 -noass

The audio isn't stuttering anymore, but now it's way out of sync, like 50-60 seconds

Any idea's? More settings?