I tried to convert DivX AVI to MPEG1. All is OK but video/audio sync : at the end of 85 min video the difference between video and audio gets as much as 5-8 sec.

What is wrong ?


DivX AVI parameters (according to VirtualDub's "File Info") :

Frame size 512x384
FPS (us/frame) 24.031 (41613 us)
Decompressor DivX:) Low-Motion
# of frames 123211

Audio sampling rate 44100 Stereo
Conversion Fraunhofer IIS MPEG Layer3 Codec
Preload skew 8000 samples (0.18s)
# of frames 123200

TMPGEnc settings :

Video:
Stream type MPEG1 Video
Size 320x240
Aspect 1:1
Frame Rate : I tried 24 fps and 23.976 fps, no result
Rate control : CBR
Bitrate : 1150

Sound :
Stream type: MPEG1 Audio Layer II
Frequency : 44100
Mode : Stereo
Bitrate : 112

Codec info :
Fraunhofer IIS Layer3 codec (professional)
DivX MPEG4 Low motion (DivX 3.11)

THe problem is that whoever created your AVI has altered it in an attempt to sync the audio and video as it must have been out of sync originally.

There are two things which point to this. One, is the framerate has been changed to 24.031 fps to shorten the movie slightly (at a guess to try and make the audio and video the same lengths) and there has been a delay added to the audio of 0.18 secs, I know it's not much but believe me it DOES make a difference.

What you need to do is split the video and audio into two separate files, split the audio to a wav and change the framerate of the video to 23.976 fps before splitting then post back with the lengths of each one of the files here and I will advise you further how to fix it.


ASHY

ASHY, thank you.

OK, I did it using VirtualDub and WinAmp. Now I have video only DivX AVI, converted to 23.976 fps, and uncompressed WAV 44100x16x2.

AVI params (Virtual Dub "File info") :
fps 23.976 (41708 us)
# of frames 123211 (1:25:38)
File size 642 220 032

WAV params (MS Media Player (mplayer2.exe)) :

Media length 1:25:38
File size 906 513 452

Does equal durations means that I can start TMGEnc on these files and get well syncronysed .mpg ?

Just because they are same length it doesn't mean it will be in sync, this is the reason the creator of the AVI has changed the framerate and added the skew in the first place.

You can check the A/V sync quite easily with Virtualdub.

Load up your new AVI into Virtualdub and then click Audio>WAV audio... and find find your new wav.

Click the first play button at the bottom left and this will show you if the movie is in sync or not. Go right through to the end of the movie and see if it becomes async anywhere. My guess is it will. If it is in sync you should be able to encode no problem otherwise post back here for more info.

ASHY

Yes, you right, they are not in sync.

Things looks very strange :

VirtualDub, AVI converted to 24.0 fps + extracted audio : audio 4 s later at end
VirtualDub, AVI converted to 23.976 fps + extracted audio : audio 4 s later at end
VirtualDub, initial AVI w. audio : audio 4 s ahead at end

mplayer.exe (not DirectShow mplayer2), initial AVI w. audio : sync OK
TMPGEnc, initial AVI w. audio, "Source range" at end : sync §°§¬

Today is enough for my (I am at GMT +3). I guess the best solution is just to not encode this movie at all :)

Thank you. Bye.

Try this you may get lucky.
Stick with your original avi which is 24.031 and load that into TMPG. Now load your new wav as the audio and go to the source range filter and add 180 msecs to the audio gap correct now check your movie for sync.

ASHY

How do you use the batch encoding feature of TMPGENC ? Is there some documentation or help file somewhere ? I am trying to convert a bunch of quicktime files to MPEGs.

Thanks for any help !

Thanks,
--TP

Set up movie as if you were gonna encode, when your set go to File>save project.
Do this for each movie then when ready to encode click File>batch encode. In the box that pops up add all your projects then click run.

ASHY

To batch encode you just load in your files and do yer settings then go to "file" and save it as a project file, then repeat this for every file.Now go to "file" then to "batch encode" and a window will pop up and just load your project files into the window and you are ready to encode, that"s it.....

Hey Ashy ,I guess we answered at the same time ....HAHA

After all of the files are in the "batch box", do you have to hit ctrl+a to select all of the files before you hit RUN?
My machine stopped the batch process and exitied tmpg after 2 clips were converted....

Whatevers in the list should be converted.

ASHY

When editing a mpeg2 file in merge and cut, the picture is blocky and pixelated.It is though it is not decoded properly.This also is the case when using Nero's playback option,although when burnt to disk, the file plays perfectly on my standalone. This problem is really annoying when splitting files because some frames cannot be viewed due to the blocky output. I'm presuming this is down to a codec problem. TMPEGEnc loads the mpeg ok and the picture is fine when using the source range option. Could anyone please assist?

I have the same problem when I try to view it in the editing window and when I use media player it is a wash of colors, and I do think it could be a codec problem but I haven"t figured out which one it is, I don"t know of any good solution for this accept that you could use different editing software ,i use a capture program called "power vcr" it edits and joins mpeg files with out giveing me the distorted preview but it is a big program to have on your computer just for editing...

Thanks for the reply Minion. Working on the codec theory I have actually cured the problem now. Like you I also had the problem with Media player. The solution was a simple un-install/re-install of the mpeg2 codec.

I have encoded PAL .avi (DivX 5)and DVD PAL to PAL VCD using TMPG 2.54a.
The file and VCD disc play fine on the computer (audio synch ok).

When played on a standalone DVD player, after 7 minutes audio synch is lost. The video appears to speed up slightly, then go slow motion, then normal speed. It repeats this cycle. Audio synch is still lost.

I have encoded videos using other encoders eg Panasonic, without this problem. I thought you should know about this bug. Nero accepts the MPEG stream as being standard VCD. I have checked my standalone (its a new Daewoo DVD player) and it works ok with other PAL VCD's

Cheers
H

If it plays fine on your PC it isn't a bug of TMPG, it is NERO.
For some reason Nero isn't compatible with some players, this is usually due to using older versions of NERO which have this documented bug.

They corrected this in one of the versions a while back, but I cant remember from which version the bug was solved, so my advice is to go to the NERO site and download the new version.

If this doesn't solve your problem try another burning software such as 'VCDeasy' or apparantly this sort of problem has been solved when using 'Instant cd-dvd'.

ASHY

Thanks for taking the time to reply.

Actually I have a late version of Nero 5558 and it burns MPEG's ok from using the Panasonic Standalone encoder

(unfortunately the Panasonic encoder has a bug in the audio so I only use it to produce a .m1v file and multiplex the audio in TMPG. This then burns and plays fine)

Perhaps there is an incompatability somewhere in Nero's interpretation of the TMPG's stream?

OK so I have a work around solution using Panasonic and TMPG. For those users with this problem I use Panasonic Encoder 2.51 for video stream only as the audio produces a silent gap every second. I encode the audio separtely to a .mpa file then multiplex them in TMPG.

Good Luck!

Omega,

It is Possible that the audio of the movie is VBR in that case you should
load the movie Virtualdub (Virtualdub will tell you if this is the case!)and save the audio uncompressed PCM.

Load the audio and video as separate files into TMPGEnc.

(or frameserve loading the new audiofile in virtualdub)

Good luck,

Borgster.

Thanks for your suggestion :)
Audio already as .wav file because i thought it might be a problem

Thanks for your suggestion :)
Audio already as .wav file because i thought it might be a problem

Nero 5558? That's seems like an old version to me considering we are now on version 5582. There have been quite a few versions since 5558.

ASHY

After review the pre-messages, it still say unspport~~~

Thanks^.^

Download DIVX 3.11 and DIVX 4.12 and install both.

ASHY

I got a problem when ripping DVD. I use SmartRipper then DVD2AVI. After that I use TMPGEnc to convert it into NTSC-VCD format. However, for some songs in the CD, the program, TMPGEnc, suddenly closed by itself when the encoding get around 98-99%. Can anyone help?

Thanks

The abilty to read & import sequential VOB files automaticaly like DVD2AVI does.
Also repeat/loop and a fade in/out function for video would realy add a sweet touch to Custom Video.

I used to use tmpgenc with windows millenium and never had any problems but recently i changed to windows xp professional and now none of the files i wish to convert from avi to mpeg work, i get the message file can not open or file unsupported, as i said earlier, before i installed xp i didnt have any problem converting these type of files, does anybody know whether this software is compatible with windows xp professional? I downloaded the newest version of tmpgenc.

This is not problem between XP and TMPGEnc. On your XP system, you do not have codecs which you had in WinMe system.

>This is not problem between XP and TMPGEnc. On your XP system, you do not have codecs which you had in WinMe system.
>thanks, do you know which codecs i need?

Actually, you might try going into TMPGEnc's Environment settings and changing the priority of the DirectShow filters to 0 or 1. They probably reset to the default if you re-installed TMPGEnc after your upgrade.

Jeff

minioN..thanks dude for all ur help.really make these forums worth while posting in...im prety sure everyone thats posted here
feeels the same way,,
anyways...
keep up the good work dude..:)

yeah props to minion
he's like...some sort of godly god-like god of some sort

Hello

I just downloaded TMPGEnc using the wizard and converting from Divx to SVCD using the High Quality setting the video is not smooth about every 10 seconds, it seems to skip a frame or pause for a milisecond.

The file is being converted on a intel celeron 1.3ghz.

Are there any settings that can be changed to prevent this?
Does anyone know why this is happening?

Thanks

matty

Yes, don't change the framerate of the original movie.

ASHY

hi,

i 've downloaded and i am very satisfied with this proggy but i've a question .. i was converting a avi video into mpeg and my PC crashed during the operation ... now i have a mpeg file which is not completed ... is it possible to resume the conversion process from the frame where it was aborted ? it would save me a lot of time ...

thx & greez,
Jaffa Geronimo of Apophis

Sort of.
Load your unfinished MPEG into TMPG the click File>Preview and move the slider to the very end, click on the arrow a couple of times just to make sure it is the end and note the frame number.

Now load your AVI, click Setting>advanced and double click the 'Source range ' filter. Type the frame number you just got from your MPEG into the 'start frame' box then click the 'set start frame' button.
Do the same for the end frame and then encode your movie.
You will have only the part from where your PC crashed encoded. You then have to join the 2 parts together using the 'Merge&Cut' tool, go to File>MPEGtools.

ASHY

much thx for this hint .. i'll try it ..

greez,
Jaffa Geronimo of Apophis

Im following up on that illegal mpeg situation. I make my mpegs with vcd gear using the bin-cue - mpeg option. I installed that mpeg2 codec and this still didnt solve the issue. Cant demultiplex either cuz it says illegal mpeg no matter what i do. Please help! thanks again

VCD gear is your problem. This program is crap.
I have had many instances of VCD gear producing illegal MPEGs and MPEGs TMPG doesn't like and gave up using the program a long time ago.

What is the reason you are trying to extract the MPEG from an image anyway?

Anyway the best way I have found of extracting MPEGs from images is to use ISOBUSTER. http://www.smart-projects.net/isobuster/
This program will extract a usable MPG or .dat file from the image which you can then open in TMPG.
There is no need to convert .dat to MPEG as TMPG has no problem opening .dat files.

ASHY

the reason i have to do that is so i can do the trick to make my dvd player play the svcds. I make an mpeg and use tmpgenc to put a vcd header on it. So should i be able to take the mpegs that i have already made and make em work still with isobuster? I hope so cuz i have a lot of them. Thanks again for all the help. :)