Why does Tmpgenc Plus think my .avi is twice as long?

[stream]

I'm trying to convert a 67 minute .avi file to mpeg2, but tmpgenc thinks that it's 136 minutes long. Any ideas?

When I open the .avi file in virtualdub, I get some kind of strange bitrate error. It says the CBR bitrate isn't constant and that I need to reencode the .avi file. (Sorry, I'm at work so I can't give the exact error message)

But, virtualdub will play the .avi just fine, and the audio sounds great.

By the way, I read the Tmpgenc errors sticky thread and found the problem of incorrect runtimes and large amounts of blank video at the end of the mpeg2. It said to use the cropping feature to select what parts of the video you want to encode. But, I've tried that, and when I try to crop it, the video pops up as the correct length.

-Jesse

[jgandara]

You probably downloaded the movie from the web. Some of them have VBR audio.

What I usually do:
+ User virtualdub mp3 (go to virtualdub tools)
+ Open it and save the audio to wav
+ Usually the wav file is still compressed, so you need another tool to save it as uncompressed wav. I have an audigy card and i have a wave editor. Look for a free tool in the audio section
+ nce you have the was uncomporessed (from 600MB to 1G) , open the video and set the audio as wav source (option on the audio menu). Set Full processing and set the compression to whatever u want. For video set it to direct source copy. You can do the same for audio, but the file will be bigger.
+ Now you have a good movie file. Encode with tmpgenc.

So the problem is the audio. What you are doing is extracting it from the video, changing the variable rate to constant. The other thing you can do is separate the video and audio, convert the audio to mv2 (or something you can use in tempgenc) and do the conversion.

[coyote]

Its definately the sound (this has been covered many times in the forum)

Another option to virtual dub is this:

1. Open up the avi in goldwave
2. click save and choose a file name for the wav it makes
3. In tmpgenc for video choose the avi. Where it says audio browse to the wav file you made.

That's it....have fun

[MOVIEGEEK]

You can also do this in TMPGEnc,load the avi then go to File->Output To WAVE.For S/VCD use 16bit 44.1khz for DVD use 16bit 48khz.

[jgandara]

The only problem with virtualdub is that it outputs the wav file, but it's still compressed and encoded as mp3 vbr. Does goldwave or tmpgenc decompress the audio?

[soundforbjt]

The easiest way to do this is to;

1. Open the avi (in regular, not mp3) virtualdub,

2. Under video tab, select Direct stream copy

3. Under audio tab select Full processing mode

4. Then under file tab select Save as avi

5. Save to a new location (Note: your file will be about twice as large due to the unmcompressed audio, but the vbr sound is now a constant bitrate wav)

The file will then have uncompressed wav audio and you'll be able to convert it with TMPGEnc with no problems.

Hope this helps.

[stream]

Thanks guys :)

By the way, this is John Mayer's Austin City Limits performance...I'm making a personal DVD out of it. Boy is it nice ;)

-Jesse

[stream]

The easiest way to do this is to;

1. Open the avi (in regular, not mp3) virtualdub,

2. Under video tab, select Direct stream copy

3. Under audio tab select Full processing mode

4. Then under file tab select Save as avi

5. Save to a new location (Note: your file will be about twice as large due to the unmcompressed audio, but the vbr sound is now a constant bitrate wav)

The file will then have uncompressed wav audio and you'll be able to convert it with TMPGEnc with no problems.

Hope this helps.

Okay, I did this, then tried with TMPGEnc again, and it got the correct length and everything. I authored the resulting streams with IFOEdit, and throw it in my DVD player. It's great...for about 3 seconds. After that, the audio starts skipping and "clipping" horribly, and the video starts playing way too fast.

What's going on?

-Jesse

[jgandara]

try something else

[Ziffelpig]

Use the Audio decompressor from avi2vcd, its better than V-Dub for decompressing the audio, and is more compatible with TMPGEnc.

[ronnylov]

1) Use Virtualdubmod or AvimuxGUI and save the audio to mp3.

2) Open the mp3 in WinAmp but a version 2.xx (3.0 and higher can't do it). In winamp preferences set output to disc writer and set your destination path. Play the mp3 file and it will be saved as wav (it does it really fast, within one minute or so).

3) Load your avi again in virtualdubmod and select direct stream processing on video and wav audio using your decompressed wav as audio source and save to new avi.

4) Check that this avi plays the audio in synch. If not then adjust audio delay in virtualdub and make new avi.

5) Load the synched avi in tmpgenc and encode.

[stream]

Thanks for the extra suggestions, guys. I'll try that, Ronny.

-Jesse