Tmpeg Enc Problems

[bdawg0411]

I am having major audio problems whenever i encode with tmpeg enc, here is what i do:

I encode my original AVI files with tmpeg enc to standard dvd mpeg 2 format, but tmpeg cannot read the audio from the original avi's so i extract the audio from the files first with goldwave. After they are done the audio is almost always off on all the files, even if i use the source range option in tmpegenc the audio is good for the first few minutes then it just gets worse and worse. I think the audio is mpeg layer 3 or something like that on the original AVI's. Is there an encoder that can read the audio without me having to extract it, or is there some kinda add in for tmpegenc im missibg?!?!? plz help me!

All my HDD's are ntfs file system and i have windows xp home edition and windows NT installed on my computer, i always encode on windows xp.

[bugster]

Are you sure that the framerate settings in TmpGenc match those of the avi, getting this wrong is a major cause of progressive sync loss like you described.

[bdawg0411]

when you convert to dvd format you have to change the frate rate to 29.97 or whatever it is. So yeah, I do change the frame rate.

[bugster]

when you convert to dvd format you have to change the frate rate to 29.97 or whatever it is. So yeah, I do change the frame rate.

But if the framerate of the avi is 23.97, you should NOT change the framerate to 29.97. In TmpGenc, under settings->Video, set Encode Mode to 3:2 Pulldown when playback and Frame Rate to 23.976 (internall 29.976).

If the avi is 25fps (Pal) then encode to 25fps or learn how to do proper Pal to NTSC conversion.

[honorarybrutha]

1) install Odio Dekoda for ac3 audio
(http://www.moonlight.co.il/download/?dl=odiodekoda)

2) scan the source file in vdub mp3 freeze for bad frames and remove them, if any. then save as avi the repaired file

3) open the repaired file in gspot, note the audio and video info (type of audio, fps for video)

4) load the repaired file in tmpgenc, using the repaired file as the source for audio and video. using the tmpgenc template, match the source and output fps for the video

5) continue as you used to.

I have been using this method for SVCD's successfully for my last 40 to 50
projects without any audio sync problems

[bdawg0411]

when i try to open the file in virtual dub i get a "couldnt locate decompressor for format "DX50" (unknown)" error.

[jtommyj]

when i try to open the file in virtual dub i get a "couldnt locate decompressor for format "DX50" (unknown)" error.

That means it's looking for the Divx 5 codec. Do you have it installed ?

[bdawg0411]

yeah i downloaded the codec a few hours ago but i had to leave home, ill install it when i get back and see if it works out ok, when i test it ill post another message.

[bdawg0411]

how exactly do you scan the source file in vdub mp3 freeze?

[bdawg0411]

Bugster:

My version of tmpeg enc does not have the 23.whatever (29.97 internally) framerate option on it for some reason, i also could not find the 3:2 pulldown on it.

[bugster]

Bugster:

My version of tmpeg enc does not have the 23.whatever (29.97 internally) framerate option on it for some reason, i also could not find the 3:2 pulldown on it.

It does, (or should have) just maybe not in the wizard. Once on the main screen, before starting the encode, click the settings button in the bottom RH corner. Select the video tab of the dialog. Set EnCode mode to 3:2 Pulldown FIRST. The other setting will then become available under FrameRate.

[bdawg0411]

still have the same problem after encoding......audio sync progressivly gets worse

[bdawg0411]

before i encode i use vdub mp3 freeze to change the audio into wav format so tmpegenc can read it, is there a setting that i am missing which may be screwing me over from there?

[Laddydaddy]

bdawg0411
My suggestion would be to demux the avi file into two separate files, one audio (wav) and one video (avi). Load them both into vdub and start to play the files. If they are in sync stop playing and drag the bar at the bottom to the middle of the clip. Start playing again. If your film is still in sync repeat this. Drag the bar again until you are near the end of the movie. Start playing and if you are still in sync you should be able to encode the film without sync problems. If at any time the film goes out of sync, you probably have bad frames that are throwing the a/v interleave off. You will have to get rid of them before you can encode the film.

[bdawg0411]

what program should i use to demux my avi files? I've only been able to find mpeg demuxers.

[Laddydaddy]

Virtual Dub (try vdub mod). Load your avi (file>open video file) into it then choose the following;
1 audio>full process mode
2 file>save wav
Give the file a name and you will now have an aduio (wav) file. Then choose;
1 audio>no audio
2 video>direct stream copy
3 file>save as avi
Give the file a name and save it. You will now have demuxed the audio and the video. Your new avi file is a video file and your wav file is an audio file.

[bdawg0411]

when i save the wave it only plays the first second of the audio and is VERY small (maybe 200 kb)

[Laddydaddy]

Does this happen with the wave file created by goldwave, or with the wave file created by vdub?

[bdawg0411]

vdub

[nutstoyou]

Is it possible your avi was originally a lot of smaller files that have been joined? This could explain why extracting audio terminates early (and progressive your out of sync problem).

[bdawg0411]

im not sure, all i know is that the audio plays fine all through my source avi file.

[bdawg0411]

it only stops after 1 second on full processing mode, if i do direct stream copy it gets the whole thing. But i think full processing mode might have something to do with makin it work....

[Laddydaddy]

Use the wav you created in goldwave and the avi you created when you demuxed the original avi in vdub. This will let you use an avi that is not interleaved with an audio, as well as an audio that is not interleaved with a video.

[bdawg0411]

Did just what yiou said, tested it in vdub, video is in sync in the beginning then gets progressivly worse and worse. My source avi file is in sync all the way through.

[secretagent]

most likely you have variable bitrrate audio and you need to have constant bitrate audio for it to stay in sync. in vdub full processing mode for audio check to see if it is 8 bit. if so you will need to change this to 16 bit. also if you save the wav in goldwave make sure it is saved as constant bitrate 16 bit.

[bdawg0411]

i am not sure what the original audio is, this is what gspot said:

150 kb/s (75/ch, stereo) VBR Fs: 48000 Hz

im pretty sure its not cbr as the audio is vbr.

[bdawg0411]

I think the main problem is within the encoder itself. Is there a way Tmpegenc can read mpeg layer 3 audio from my source avi file, because it hasn't been able to. I think If i encoded the avi file un-dexmuxed i could get the sync problem fixed. So is there any MP3 plugin for tmpegenc anywhere on the internet? Thx a lot!

[honorarybrutha]

what codec does gspot say is needed for the audio? do you have it installed?

[bdawg0411]

it says 4 compatible codecs installed

[Laddydaddy]

Your audio is variable bit rate audio. When you converted in goldwave did you load your avi file into and choose save as wav? Also, did you make sure the wave you saved was 16 bit signed?