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Converting 29.97fps to 25fps?
919 9 7-29 07:55
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HGDC84
Captain
Finland
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Some time ago, I began shootng a document project with the Pocket 2. I am supposed to create an YouTube document with it. While thinking about the framerate, I thought I might be best off at 25fps, as that is the PAL region standard, and also works best with 1/50 shutter speed, which I decided to use as some fluorescent lamps and other artificial light sources caused a 'wavy flicker' at 1/60 which was eliminated when using 1/50.

However, I later noticed I had accidentally filmed a couple of scenes with 30fps (or, to be more accurate, 29.97fps) and thought that could cause a problem if not converted to 25fps.

I tried doing the conversion using DaVinci Resolve, where I directly changed the fps of both project and shot raw clips, and tried rendering them again. However, while the video playback didn't look bad, it turned out that the audio was out of sync.

So now I'd like to ask if there was some setting etc. at Resolve that could fix this issue, or if I should find some other tools to do the conversion.

Any feedback and ideas are welcome.

7-29 07:55
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DAFlys
Captain
Flight distance : 52404905 ft
United Kingdom
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Have you tried AviSynth?  http://avisynth.nl/index.php/Main_Page

A sample script to do it -



AVISource("sourcefile.ext")


# convert 30fps clip to 25fps


super = MSuper(pel=2)


backward_vec = MAnalyse(super, overlap=0, isb = true, truemotion=true, search=3)


forward_vec = MAnalyse(super, overlap=0, isb = false, truemotion=true, search=3)


MFlowFps(super, backward_vec, forward_vec, num=25,den=1,ml=100)


7-30 02:14
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Vincent Leclerc
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Singapore
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I've been using TunesKit AceMovi to change the frame rates for my videos. You won't notice video and audio out of sync issue after converting.
7-31 20:01
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HGDC84
Captain
Finland
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DAFlys Posted at 7-30 02:14
Have you tried AviSynth?  http://avisynth.nl/index.php/Main_Page

A sample script to do it -

Thanks for the tip, I'll try it out in the nearby future :-)
8-1 12:15
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HGDC84
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Finland
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Vincent Leclerc Posted at 7-31 20:01
I've been using TunesKit AceMovi to change the frame rates for my videos. You won't notice video and audio out of sync issue after converting.

Thanks for the tip, I'll consider your suggestion if needed and have money for the software. :-)
8-1 12:16
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HGDC84
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Finland
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DAFlys Posted at 7-30 02:14
Have you tried AviSynth?  http://avisynth.nl/index.php/Main_Page

A sample script to do it -

I assume the file must be converted to AVI first? Or will it work with MP4?
8-2 13:23
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HGDC84
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Finland
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DAFlys Posted at 7-30 02:14
Have you tried AviSynth?  http://avisynth.nl/index.php/Main_Page

A sample script to do it -

Also, I haven't got that much experience with scripts, so is there some kind of "for dummies"-kind of tutorial for this?

Tried with both the MP4 and converrted AVI versions, but got an error both times when attempting to run the script using GOM Player.
8-2 14:17
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DAFlys
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HGDC84 Posted at 8-2 13:23
I assume the file must be converted to AVI first? Or will it work with MP4?

It should load mp4 I believe.   

For something with a gui have you tried Handbrake?
8-2 22:25
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HGDC84
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Finland
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DAFlys Posted at 8-2 22:25
It should load mp4 I believe.   

For something with a gui have you tried Handbrake?

Tried that, and that seemed to do the trick. Thank you very much for the tip :-)
8-11 10:29
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DAFlys
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HGDC84 Posted at 8-11 10:29
Tried that, and that seemed to do the trick. Thank you very much for the tip :-)

Super HGDC84.  
8-11 23:15
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