Wrong audio over video on vob file playback (vob for iphone)

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greasy
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Wrong audio over video on vob file playback (vob for iphone)

Post by greasy » Tue Jun 22, 2010 10:02 pm

Hi i am new to the mediacoder and i could do with some advice. i have recently extracted a vob file to be converted to the iphone, the problem is when i go to playback on iphone and mediacoder i have a running commentary although when i play the file through vlc player it plays as normal. Could anyone give me some pointers please. many thanks :?:

meRobs
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by meRobs » Thu Jun 24, 2010 8:12 am

Also, when converting a VOB don't be surprised if the audio is out of sync (see: viewtopic.php?f=17&t=8082&start=0).
Have you checked out the Tips & Guides for MediaCoder? Try: http://forum.mediacoderhq.com/viewtopic.php?f=17&t=8061
Also, get older builds at: http://www.videohelp.com/tools/MediaCoder/old-versions#download

greasy
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by greasy » Sun Jun 27, 2010 3:21 am

Hi i have looked at id setiings and i have changed them about with no success ihave notice that there 6 audio channles but dont know where to start any more help would be great. thanks

meRobs
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by meRobs » Tue Jun 29, 2010 10:14 am

I have a VOB that I had ripped and trimmed to 120 sec for testing MediaCoder.
It has three audio tracks, indicated in MC's Properties panel at right as:
Audio (128) AC3
.... Bitrate 384 kbps
.... Sample Rate 48000 Hz
....Channel 6
Audio (129) AC3
.... Bitrate 192 kbps
.... Sample Rate 48000 Hz
....Channel 2
Audio (130) AC3
.... Bitrate 192 kbps
.... Sample Rate 48000 Hz
....Channel 2

So, first of all, I will assume you realise that 'Channel: 6' means that this stream (ID 128) is 5.1 surround -- not that there are 6 channels!
Next: to identify which stream is which, I don't use the Play button, which in build 4682 plays only the first stream (ID128), so I opened the file in the software player "VLC" (free).
Then, I R-click on the playing video and select Audio > Audio Track > track 1, etc.
In my case, the streams (Track 1, 2 and 3) are English, French and Italian.

Hence in MediaCoder, they would be Audio ID 128, 129 and 130.
Then, on the Audio tab, I use the Audio ID drop-down menu to select 129 and after conversion, the file plays in French.
Of course, on the audio tab I had NOT seleected "Copy Audio".

Maybe, if the above fails, you had inadvertently set MediaCoder to accept only stereo for conversion (skipping the main 5.1 channels)?
If so, reset your tab values after a full Reset of all parameters/settings by clicking File > Revert All Settings.
Hope this helps.
Have you checked out the Tips & Guides for MediaCoder? Try: http://forum.mediacoderhq.com/viewtopic.php?f=17&t=8061
Also, get older builds at: http://www.videohelp.com/tools/MediaCoder/old-versions#download

greasy
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by greasy » Tue Jun 29, 2010 11:31 pm

hi me again, thanks for you info on this matter, i did what you said and found that in vlc player the voice over is in track 2 i have made sure that i have selected track one ( id128) in the drop down tabs but to no avail. here is a copy of the properties maybe this might help you to help me. many thanks.
General
Complete name : C:\Users\steve\Desktop\.vob
Format : MPEG-PS
File size : 6.52 GiB
Duration : 1h 22mn
Overall bit rate : 11.2 Mbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Duration : 305ms
Bit rate mode : Variable
Bit rate : 9 964 Kbps
Nominal bit rate : 9 800 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : Component
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.961
Stream size : 371 KiB (0%)

Audio #1
ID : 128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Duration : 1h 22mn
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
Stream size : 266 MiB (4%)

Audio #2
ID : 129 (0x81)
Format : AC-3
Format/Info : Audio Coding 3
Duration : 1h 22mn
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Stream size : 228 MiB (3%)

meRobs
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by meRobs » Wed Jun 30, 2010 4:53 pm

A quick comment:
1) the video duration is given as only 304 millisec, very much less than the 1 h 22 min of audio!!
2) the scan type is given as Progressive yet the scan order is TFF, which is for Interlaced (ie not progresssive)!

Hence, maybe the file is faulty?
Have you checked out the Tips & Guides for MediaCoder? Try: http://forum.mediacoderhq.com/viewtopic.php?f=17&t=8061
Also, get older builds at: http://www.videohelp.com/tools/MediaCoder/old-versions#download

meRobs
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Re: Wrong audio over video on vob file playback (vob for iphone)

Post by meRobs » Thu Jul 01, 2010 8:22 am

Also, I just noted in Note 2 of viewtopic.php?f=17&t=8624&p=26247#p26247 that the use of AviSynth in some builds of MediaCoder seem to skip the 6-ch streams of a VOB and use the 2-channel.
Have you checked out the Tips & Guides for MediaCoder? Try: http://forum.mediacoderhq.com/viewtopic.php?f=17&t=8061
Also, get older builds at: http://www.videohelp.com/tools/MediaCoder/old-versions#download

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