audio mux in mkv 720p

[loa-ash]

Hello, I'm trying to mux 25 fps audio on mkv with video at 23.976 fps. But I've a progressive desync after muxing. I'm using mkvtoolnix with timecode.txt:

# timecode format v1
Assume 25.000

So I've converted the video to 25fps and audio could be good, but I can't sync.... any ideas please?

[setarip_old]

Hi!any ideas please?Why don't you just use BOTH the video and audio from your original source material (Presumably DVD or similar)? They are certainly already at the same framerate...

[loa-ash]

video is HDTV 720p in x264 about Samantha who s01e01...the first 3.30 minutes are synced both with 25fps but after that I've a progressive and increase desync to the end, impossible to mux.
My audio is italian from DVB-S source...