Doom9's Forum - View Single Post - audio and video 23.976fps to 25fps using mp4

manono · 31st May 2011, 05:40

Why speed up the video to match the PAL audio? Me, I would (and often do) slow the audio to match the 23.976fps video. Convert the audio to WAV first. I slow it using BeSweet, although there are other ways. It will also adjust the pitch in the process. Then reencode the audio to whatever you want.

If the video is 29.97fps, then what you do depends on what kind of 29.97fps video it is (interlaced or standards converted), and how the audio was converted to 25fps, or if it was created at 25fps. A comparison of the 2 lengths should clue you in. They might even be exactly the same length and nothing has to be done.

31st May 2011, 05:40	#2 \| Link
manono Moderator Join Date: Oct 2001 Location: Hawaii Posts: 7,406	Why speed up the video to match the PAL audio? Me, I would (and often do) slow the audio to match the 23.976fps video. Convert the audio to WAV first. I slow it using BeSweet, although there are other ways. It will also adjust the pitch in the process. Then reencode the audio to whatever you want. If the video is 29.97fps, then what you do depends on what kind of 29.97fps video it is (interlaced or standards converted), and how the audio was converted to 25fps, or if it was created at 25fps. A comparison of the 2 lengths should clue you in. They might even be exactly the same length and nothing has to be done.