changing frame rate from 29970 - 25000 (help)

[craigyd]

I have a video thats been encoded from 29970 - 25000 for pal

And now im converting the wav to mp2 and bringing the frame rate down to 25000 as well so the audio and visual are in sync, using besweet.

This is working when I play the finished mpg but the voices are in slow motion.

Text example: ttthhhiiisss iiisss wwworrrkkingg
hahahaha

What am I doing wrong

Hope you can help

[segfault]

I try to avoid PAL/NTSC frame rate conversions as much as possible, but when I do them I use a simple ConvertFPS(25) in my AVISynth script. That works very well and there is no need to resample the audio.... at least not in the conversions I have done. :rolleyes:

[Boulder]

Converting the audio in BeSweet means that it will slow it down or speed it up accordingly. When you go to 25 from 29.97, you'll need to slow the audio down quite seriously.

I use BeSweet for 23.976->25 conversions, but if I'll have to do 29.97->25, I'd go for GoldWave or CoolEdit. There are some filters that will stretch or shrink the audio without changing the pitch. You'll need to know the exact length of the video file (you can get this with VirtualDub for example) and then you'll change the length of the audio track to this length.

[htc10825]

for time adjust I always use WaveLab. Besweet & co. works not 100% reliable. In WaveLab you can set a time factor, such as 99.997% or 100.001%, very precise!
How the time factor for your case is, depends on how did you convert your video(avisynth script?) and the details of your source video.

[shinakuma8]

I just did a framerate conversion from NTSC to PAL. like someone said, just use ConvertFPS(25) in avisynth and there's no need to convert the audio track because as long as the film length is the same, you shouldn't mess with the sound. just multiplex with BBMpeg and you have a perfect FPS conversion.

[htc10825]

If you use the convertFPS function in avisynth you'll get many blended frames out of 100% clean movie pictures(as the output of IVTC). So the picture quality get lower(unsharp, need more bits for the same compression quality). This filter is not recommanded for film material. Only for 100% interlaced video.

For DVD/Film material all the expert in the world will recommand the speed-up/time adjusting method.