MKV audio to 25fps.?

[bagmand22]

Hi, I got some MKV files and its 24fps, and would like to turn it to 25fps.
With TSMUXER i can easily demux it and turn the video to 25 fps, but not the audio.
What program can do this with or without re-encoding, so the files are sync, and i then can mux it in TSMUXER.
The audio files are DTS and AC3.

[Bjs]

You may find what you need here

[bagmand22]

Ok, but how do i load the MKV or audio file in eac3to?
And where is the "change to 25fps" option?

[bagmand22]

Anybody?

[Baldrick]

Wait some DAYS before you bump/reply. And MKV files are NOT blu-ray ripping. Moving you.


Use the command line, from the start menu type

"c:\temp\eac3to.exe" "c:\temp\movie.dts" "c:\temp\movie.ac3" -448 -speedup

Replace the c:\temp with your folder location to your files.

[bagmand22]

Just another thing:
Why is it only possible to change fps in video without reencoding,
and not with audio. There i have to reencode.

[AlanHK]

Just another thing:
Why is it only possible to change fps in video without reencoding,
and not with audio. There i have to reencode.

Digital audio frames are unrelated to the video frame rate, and cannot be changed. So you have to resample.

However if it's AC3 audio, you can use "Audioscale" which changes length of AC3 audio by dropping or duplicating entire frames.

Good for small adjustments, not sure how it would sound for a 24/25 change.

[Xpenguin17]

It's possible to just set a sample rate without actually resampling. That way you can losslessly speedup/slowdown your audio. 'Dunno which media player supports this feature, and it's useless if you wanna maintain the pitch.

[jagabo]

As Xpenguin17 says, it's possible to change the sample rate flagged in the header of some containers and avoid reencoding the audio. But some devices may not be able to handle arbitrary sample rates. 48,000 Hz samples would have to change to 50,050 Hz to match the video speed up from NTSC film to PAL. And some formats may not support arbitrary sample rates. I don't know if AC3 does or not.