converted avi slow in dvd

[nic575]

Hi. I'm sure this will be an easy one for those of you who know what you're doing. I have been using tmpgenc for a while, mainly for ripped dvd files, I downloaded some .avi movies from the web and encoded them for VCD to play in my dvd. The conversion and everything goes just fine, and the ending MPEG file plays fine on my computer. I usually burn to CD using Unlead DVD. When I burn the converted .avi's they play in my DVD but seem to be slightly slow. Not slow motion really but like the frame rate is off or something, just a slight slowness, but it gets a little irritating when watching movies. Anyone know who to resolve this. Thanks for any help anyone can give.

[Craig Tucker]

Are you converting them to the same format as the source file. (the templates you load in TMPGEnc)

Generally there are 3 formats

NTSC 29.97fps
NTSCfilm 23.976fps and
PAL 25fps

Although some divx are encoded with lower framerates to reduce bitrate.

Craig

[nic575]

Hey Craig,

I am basically converting them all to NTSC 29.97fps. The only place I have found info on the source rate for the avi's is by checking the properties of the individual clips and most seem to be between 10-15 fps. It seemed that if I changed the frame rate in TMPGEnc, it would encode the file but then when I tried to burn in Unlead DVD it would tell me it was not a valid MPEG file.

[Craig Tucker]

Yes for it to be VCD compliant it has to be one of the 3 framerates I stated. I was thinking that if you had a pal source and were converting it to NTSC or vice versa. Try encoding to NTSCfilm as that is closest to your source framerate. With such low framerates though, high motion scenes are not going to look very smooth.

Craig

[nic575]

Thanks Craig, I will try the NTSC film setting and see what happens.

I am not familiar with VirtualDub, but have seen a lot of people mention it here, should I be using that at any point here, or is it mainly just a frame rate problem.

Again thanks for all your help.

Nicole

[Craig Tucker]

Virtualdub is used mainly for capturing and editing (cutting out commercials, applying filters, resizing etc), but if you have a divx file you want to encode it can be used to display the file information, framerate, codecs used etc. Check the file for bad frames which can then be removed, and save the audio as an uncompressed pcm wav file. Quite often the audio of a divx is compressed as an mp3 or 5 channel ac3 (this requires another piece of software called headac3he), this will cause you audio sync problem in the encoding process. Saving the audio as an uncompressed wav file and using that as your audio sorce in TMPGEnc is the solution to this problem.

Craig