Selur's Little Message Board

Hi Pros and Amateurs!

Need a little help here :
I have a movie in two different versions:

#1: 4K ,23.976 fps ,ac3 384 kbps
#2 : 1080p ,24 fps ,eac3 640 kbps

How can i mux the 640 kbps audio in the 4K mkv container?
I tried a simple mux-in and the audio gets desynced of course...
Any help would be nice!

Simple remux would only work if:
a. the length of both versions differs by a factor of 24/23.976, and
b. the content of both version (so no different cuts, etc.)
is the same.

Assuming that the content is the same, but the playback length differs by the 24/23.976 and you use .mkv as output container, one could do the remux using MKVToolnix GUI and adjust the length by settings a corresponding 'Strech by' info in the properties of the audio clip.

Assuming that the content is the same, but the playback length differs by the 24/23.976 and you do not use .mkv as output container, the only solution would be to reencode the audio while setting "Audio->Base->Filtering->Speed change" accordingly.

If the content isn't exaclty the same your only option is using a full fledget NLE and and start editing the audio,... (Hybrid can't help there)

Cu Selur

Thank you!
Will try ASAP!