Sound out of sync in Avidemux

[Lambert]

When editing VOB in avidemux, the sound is often out of sync with the video. Would someone help me either fix that or find another free or inexpensive editor?

Thank you.

[poisondeathray]

What kind of editing? e.g. Simple cuts, or complex fades and transitions?

What is your desired format goal? (e.g. DVD, flash video etc...)

[Soopafresh]

If you can swing the $, VideoRedo is terrific.

[poisondeathray]

I'll second Soopa's suggestion.

That is one of the few programs that are worth the $ IMO. If you do any MPEG editing it's worth a look. It's frame accurate and only re-encodes around the cut site.

A freeware MPEG2 cutter alternative would be mpg2cut2

[hech54]

When editing VOB in avidemux, the sound is often out of sync with the video. Would someone help me either fix that or find another free or inexpensive editor?

Thank you.

If you are taking just one VOB from a full DVD rip then you need to know
that the audio from that DVD rip is "tied" to the next and/or previous VOB.
Sometimes this fact is painfully more obvious that other times. I have
not run across this problem is quite a while.
It's not the fault of AviDemux.
If I were you I would copy the VOB....then run that VOB through FixVTS
to attempt to repair the audio problem.....or run the entire DVD rip through FixVTS.
The audio sync tool in AviDemux is also simple and straight-forward.

Also if the audio "goes" out of sync gradually....just press stop then start again.
Most editors are pretty lousy "players".

[ZQX]

I'll second Soopa's suggestion.

That is one of the few programs that are worth the $ IMO. If you do any MPEG editing it's worth a look. It's frame accurate and only re-encodes around the cut site.

I'm pretty sure it uses the HC encoder nowadays for its re-encoding around the frame-accurate cut-site. It's a great piece of software. And its "quicksteam-fix" tool works wonders on problematic mpeg files.

Also don't forget the Womble MPEG Video Wizard DVD is on sale for ~US$35 until tomorrow!!! (One-year license).

(Here's the link!)

[Lambert]

Thank you for your suggestions, everyone., everyone.

I am doing simple cuts, by the way.

I'll try your suggestions.

[tinker]

I found that AviDemux has a problem with 29.97 (NTSC) frame rate, it gets worse with 2:3 pull down, specially when you import VOB file.
I use TMPGEnc Xpress to process file first and than to AviDemux, looks like it is OK after.

[calande]

Hi, I'm having an out-of-sync problem with Avidemux too. It only happens with a specific file. How could I solve the problem, please? Thanks.

[titigrom]

I often encountered this issue too. I record DVB shows but I always have to author the clips into DVD, in the same time I cut commercials. After that, I send the VOBs to Avidemux and convert them to divx/xvid.
When I open directly the files I recorded, there's always this out-of-sync problem. As hech54 said :

The audio sync tool in AviDemux is also simple and straight-forward.

DVB files look like this : audio packets are here not tied to video packets. These files always must be corrected. You can demux the Audio with DGMPGDec DGIndex and use the demuxed audio with Avidemux. But I regret that Avidemux does not recognize MPEG Audio files (.mpa, .mp2) others than .mp3

[GreyDeath]

AVIDemux I've found has an Audio Shift to adjust sync issues. Adjustments are in milliseconds and you may have to do a sample render to see which way to go.

[calande]

Where is it? I can't find it in the options of Avidemux...

[poisondeathray]

Where is it? I can't find it in the options of Avidemux...

look for the shift box and checkmark it, enter the shift value, press enter

[calande]

Cool, thanks. Other than that, do you also have a problem with audio being cut off every half second when you play a movie in Avidemux?

[poisondeathray]

i usually don't have that issue

what format is your video? use mediainfo if you don't know

[calande]

Thanks, great utility. Here's more info on my sample:

General
Complete name : C:\Users\Asus\Desktop\video.mpg
Format : MPEG-PS
File size : 516 KiB
Duration : 9s 411ms
Overall bit rate : 449 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : M=1, N=12
Duration : 8s 90ms
Bit rate mode : Variable
Bit rate : 376 Kbps
Nominal bit rate : 800 Kbps
Width : 544 pixels
Height : 576 pixels
Display aspect ratio : 2.2:1
Frame rate : 50.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.024
Stream size : 371 KiB (72%)

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 2
Format profile : Layer 3
Mode : Joint stereo
Mode extension : MS Stereo
Duration : 9s 411ms
Bit rate mode : Constant
Bit rate : 64.0 Kbps
Channel(s) : 2 channels
Sampling rate : 24.0 KHz
Video delay : -1s 251ms
Stream size : 73.5 KiB (14%)

[poisondeathray]

i'm not sure why

does it play normally in dedicated players (e.g. vlc, kmplayer, smplayer, mpchc) ?

[calande]

Yes it does, as expected. The problem only happens in Avidemux. I thought that happened with everybody else too :/

[poisondeathray]

your video isn't very standard ( a 50fps mpeg2 file ) , and has non standard dimensions, and very low bitrate

what is the source?

have you tried another avidemux build? perhaps a newer svn build?
http://avidemux.razorbyte.com.au/

perhaps if you upload a sample to the avidemux forum, the could have a look at it and "fix" any possible incompatibilities
http://avidemux.org/admForum/

[calande]

OK. The source is my DVB-T program. My videos are all TV movies or documentaries.

[Bonie81]

I always use AVIDemux in copy mode with default values but never faced such problem!
little-bit strange! it always worked well up till now!

[Bonie81]

@ poisondeathray

thanks for the links, i recently updated to 2.5.3 and found much better improved than 2.5.2
thanks a lot!