Comments

rraud wrote on 12/24/2022, 9:46 AM

NTSC 59.94 is often refereed to as 60fps. The video speed differential is to match the 60Hz electrical system, since we cannot have part of a frame. Similar to 24fps film, when converted ro video it is 23.976 fps. NTSC 30 is 29.97 video. SMPTE timecode has a 'drop frame' mode to match real time duration. I'm sure MV @Musicvid can elaborate.

Musicvid wrote on 12/24/2022, 2:32 PM

@rraud has elaborated enough to answer your question.

A little of the math -- NTSC frame rates are derived like this:

60 x 1000/1001 ≈ 54.940

30 x 1000/1001 ≈ 29.970

24 x 1000/1991 ≈ 23.976

All irrational numbers, of course.

So if you put NTSC in a rational frame rate project or vice versa, every 1001st frame will be either a duplicate or drop, or nearly undetectable with optical flow resampling.

As far as your OBS settings, 60fps matches your refresh rate, and it will work best in a 60p project, unless you plan to deliver broadcasts or optical discs in the US (unlikely) ;?)

59.94p is generally referred to as 60p. MediaInfo can usually tell the difference if it is flagged correctly.

Rivas wrote on 12/24/2022, 2:47 PM

@rraud has elaborated enough to answer your question.

A little of the math -- NTSC frame rates are derived like this:

60 x 1000/1001 ≈ 54.940

30 x 1000/1001 ≈ 29.970

24 x 1000/1991 ≈ 23.976

All irrational numbers, of course.

So if you put NTSC in a rational frame rate project or vice versa, every 1001st frame will be either a duplicate or drop, or nearly undetectable with optical flow resampling.

As far as your OBS settings, 60fps matches your refresh rate, and it will work best in a 60p project, unless you plan to deliver broadcasts or optical discs in the US (unlikely) ;?)

Basically what I want is to record at 60fps in OBS, edit and render at 60fps. My question is whether this would bring me problems, but I believe based on your answer that no, my work is only about posting videos on youtube, so I believe I will not have problems with the files.

Musicvid wrote on 12/24/2022, 2:55 PM

No it won't cause problems and 60.000 is your optimal setting, at least in theory. I think you should re-gift "The Solution" to @rraud, as he responded first ;?)

Rivas wrote on 12/24/2022, 4:11 PM

Não, não vai causar problemas e 60.000 é a sua configuração ideal, pelo menos em teoria. Eu acho que você deve re-presentear "A Solução" para @rraud, como ele respondeu primeiro ;?)

hehehe, tudo bem, muito obrigado, eu sou novo aqui e eu realmente não sei como as coisas funcionam aqui no fórum, mas é isso!

Wiew wrote on 12/24/2022, 4:37 PM

@Musicvid  @rraud

Sorry, may I borrow this post for an additional question.

Something I've struggled/thinking /with for a long time
I live in Belgium so I film Pal.
50 fps or scaled down 25.
I read everywhere that if you want to create cinema effect the standard is 24 fps.
This means that if I want to get cinema effect in my movie , I have to downscale and render from 25 to 24 .
But won't I lose a frame every second ??
Won't this result in a movie that clips every second because a frame is missing ,
and a film that gets shorter in time, because every second there is 1 frame missing ??

Musicvid wrote on 12/24/2022, 5:10 PM

Standard film rate is 24fps. Beyond that, there is nothing special about the "cinema effect," other than for nostalgia buffs. I wouldn't alter your 50/25 video frame rate by 4% just for that placebo effect.

The opposite case, film-to-PAL optical disc, is traditionally handled by speeding up the film and audio slightly. Another way is to flag 24p as 25, and let the hardware player handle the playback conversion.

But with PAL video source as you have, there is really no need or advantage to change the frame rate.

DMT3 wrote on 12/24/2022, 5:44 PM

I must agree with Musicvid. I don't see any aesthetic gain going from 25 to 24fps. To NTSC viewers, PAL already has that film flicker. I think the idea of cinema look is overrated. Good lighting and a good camera can make video look like film without any frame rate nonsense.

Musicvid wrote on 12/24/2022, 9:14 PM

To NTSC viewers, PAL already has that film flicker.

😄😄

 

EricLNZ wrote on 12/24/2022, 9:16 PM

I think the idea of cinema look is overrated

+1001

bitman wrote on 12/25/2022, 2:43 AM

@Musicvid  @rraud

Sorry, may I borrow this post for an additional question.

Something I've struggled/thinking /with for a long time
I live in Belgium so I film Pal.
50 fps or scaled down 25.
I read everywhere that if you want to create cinema effect the standard is 24 fps.
This means that if I want to get cinema effect in my movie , I have to downscale and render from 25 to 24 .
But won't I lose a frame every second ??
Won't this result in a movie that clips every second because a frame is missing ,
and a film that gets shorter in time, because every second there is 1 frame missing ??

@Wiew

Same here, also in Belgium, do not be bothered with 24 fps, in our pal country, just use 25 or 50fps. I usually film in 25p 4K wildlife (birds usually) to down convert to 25p full HD as I do not have a 4K TV. Full HD has the benefit to zoom in further more (from the 600mm RX10M3 source) and to help with stabilization software to zoom in where needed!

Filming in 50fps 4K is not possible with my camera. In full HD it is possible if I plan for some slowmo scenes. Be aware that the higher framerate you shoot, the less light is available to your sensor, so there are benefits to keep the FPS low...

Quote "to NTSC viewers, PAL already has that film flicker." ==> yes, very funny, but 25fps vs 30fps 4K is also a bit less taxing in Vegas on your PC's hardware I presume, and gives us in Europe a better editing experience!

Last changed by bitman on 12/25/2022, 2:47 AM, changed a total of 1 times.

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