Redrive the keyframes in Virtualdub

[davexnet]

Hello -
I downloaded a 6-part tv series. First 5 parts I was able
to convert to svcd pretty well. But part 6 is giving me a problem.

If I play the avi in mediaplayer it plays ok. I'm saving the WAV,
adjusting it (time stretch) by 104.27%, and reducing the frame
rate to 23.976 from 25fps. This procedure worked well on the
other episodes. (This how I'm doing PAL>NTSC)

In this episode, the sound is unsychronized.
It's not just out of synch in the mpg, the (new) avi is out of synch
as well. (by about two seconds)
Just for a laugh, I took the original avi and used the extended
open to "redrive" the keyframes. It finished normally, but the
new file only has 1 keyframe.

I'm pretty sure I could feed the original AVI into tmpgenc
and do PAL>NTSC, but the result will be a little jerky.
Any thoughts appreciated.
Dave

[setarip]

"the (new) avi is out of synch as well. (by about two seconds)"



A) If the difference between audio and video is constant throughout the video:

Load the file into VirtualDub or NanDub.
Set BOTH "Video" and "Audio" to "Direct Stream Copy".
From the "Audio" dropdown menu, select "Interleaving"
Under "Audio skew correction", set an appropriate number of milleseconds (positive or negative) in the box labelled "Delay audio track by"
Save with a new filename

B) If the difference increases as the movie plays:

From under the "Video" dropdown menu, select framerate - and select "Change so video and audio durations match"

Let us know of your success ;>}

[davexnet]

Hi Setarip,
the audio became worse (late) as the 30 minute show
progressed. Setting the durations the same did not help.
Weird, but true.
So I went back to the original AVI @ 25fps.
And in tmpgenc, I set the video source = the avi,
and for audio, pointed it to the extracted wav. (compresed,
directly from the avi)
I set the external mp2 tool (toolame) using tmpgencs
environment settings, and chose the wav as the audio source.

I selected the ntsc 352*480 template, 2400 avg, 2520 max
300 min with pad and it came out great.

*However* when I watch it on the TV, it is not quite as smooth
as the first 5 episodes that I was able to reduce the fps to 23.976
and successfully synch the sound before encoding inTMPG.
Dave