Thank you, Manono.
I have this PAL audio which is shorter than the video I want to synchronize it with. The PAL audio is "21:15.960"
and the target video is film, and it audio is "22:21.415".
I have read that you need to convert the audio using a ratio of 104.271%, is that right? How would I do that using besweet?
The thing is I tried in Adobe Audition using the "stretch" effect with the 104.271% ratio and the PAL audio turned shorter instead of longer: 20:23.695.
So I looked for a solution and someone suggested using a 95.904 ratio. I wonder why this number as I had never seen it before (I did have seen 104.271%) but the thing is that the audio is now as long as the film audio.
Adobe Audition > Effects > Time/Pitch > Stretch:
The only settings I have edited these:
"Ratio" box: 95.904
Stretching mode > "Time stretch (preserves pitch)"