5 ms·

The traditional frame rate for film is 24fps, which is converted using 3:2 pulldown to 30 fps. 23.976 fps converts using 3:2 pulldown to 29.97 fps (23.976*30/24

The traditional frame rate for film is 24fps, which is converted using 3:2 pulldown to 30 fps. 23.976 fps converts using 3:2 pulldown to 29.97 fps (23.976*30/24=29.97).

Tempest1981 4y ago
While reading about 3:2 pulldown, I saw that for PAL (25 fps) there is 2:2:3:2:3 pulldown to 30 fps.
- dylan604 4y ago
  but rarely does anyone actually do this. normally, a 4% speed change is done to get the frame rate to match. as for the audio, it totally depends on how much effort someone put into it to correct the pitch so that the frequencies are the same in both frame rates. typically, nope. things sound higher pitched in 25fps than they do at the original 24 or 24000/1001 frame rates
  - anigbrowl 4y ago
    I remember living in the UK 20 years ago when my friend had got into Buffy the Vampire Slayer. He insisted I watch some episodes. But because the target demographic was 'nerdy night owls' on a non-prestige TV channel, they cheaped out on the conversion and by the end of each 45 minute episode the dialog had gone badly out of sync. My friend insisted I was just imagining it, but only one of us went on to have a career doing post-production in the US market. To be completely frank I've looked down on UK/EU broadcast techs a little ever since because being able to set everything to 25fps and forget about it is easy street.
    - dylan604 4y ago
      I've made a career of taking pull down sequences out of videos to prep for DVD->Blu-ray->streaming. Where others have failed, I have properly restored. "Others" for example are FAANG's streaming services. Everyone wants it to be a single button IVTC, "set it and forget it" like you said. Shot on 24fps film, edited at 29.97 with pull down where every edit is a break in cadence, 30i graphics/bumpers, and some shows (I'm looking at you The Shield) where they shot 30fps film for a special look/feel during certain scenes, and a set-it-forget IVTC will not do well at all.
    - ajanuary 4y ago
      > To be completely frank I've looked down on UK/EU broadcast techs a little ever since because being able to set everything to 25fps and forget about it is easy street. My experience has been the reverse. Because they can, people in UK/EU have historically cared much more about frame accuracy. It’s only in the last 10 years or so that people in North America have started caring about frame accuracy. In the past it’s been quite hard to do because of the non integer frame rate.
  - axiolite 4y ago
    Parent was obvious talking about converting 25fps PAL video to 30fs NTSC frame rate, which happens ALL THE TIME... NOT about converting from film to PAL. You are arguing with no-one.
    - dylan604 4y ago
      Yes, I have no idea what I'm talking about. I forget that sometimes. However, maybe you've forgotten that a lot of 25fps was shot progressive so 25psf more than 50i so that the video conversion was 25->24->29.97 which happens all the time as well. Glad to know there's an expert on the boards I can have second guess me though. I'll hit you up next time I might think I know something from 30 years of experience
      - axiolite 4y ago
        > Glad to know there's an expert on the boards I can have second guess me though. I'll hit you up next time I might think I know something from 30 years of experience I suggest you get over yourself. I am indeed a video expert with decades of IVTC experience. The first line of your reply was: "but rarely does anyone actually do this" That is factually incorrect, no matter how many years of experience you may have.

The traditional frame rate for film is 24fps, which is converted using 3:2 pulldown to 30 fps. 23.976 fps converts using 3:2 pulldown to 29.97 fps (23.976*30/24=29.97).

Tempest1981 4y ago

While reading about 3:2 pulldown, I saw that for PAL (25 fps) there is 2:2:3:2:3 pulldown to 30 fps.

dylan604 4y ago
but rarely does anyone actually do this. normally, a 4% speed change is done to get the frame rate to match. as for the audio, it totally depends on how much effort someone put into it to correct the pitch so that the frequencies are the same in both frame rates. typically, nope. things sound higher pitched in 25fps than they do at the original 24 or 24000/1001 frame rates
- anigbrowl 4y ago
  I remember living in the UK 20 years ago when my friend had got into Buffy the Vampire Slayer. He insisted I watch some episodes. But because the target demographic was 'nerdy night owls' on a non-prestige TV channel, they cheaped out on the conversion and by the end of each 45 minute episode the dialog had gone badly out of sync. My friend insisted I was just imagining it, but only one of us went on to have a career doing post-production in the US market. To be completely frank I've looked down on UK/EU broadcast techs a little ever since because being able to set everything to 25fps and forget about it is easy street.
  - dylan604 4y ago
    I've made a career of taking pull down sequences out of videos to prep for DVD->Blu-ray->streaming. Where others have failed, I have properly restored. "Others" for example are FAANG's streaming services. Everyone wants it to be a single button IVTC, "set it and forget it" like you said. Shot on 24fps film, edited at 29.97 with pull down where every edit is a break in cadence, 30i graphics/bumpers, and some shows (I'm looking at you The Shield) where they shot 30fps film for a special look/feel during certain scenes, and a set-it-forget IVTC will not do well at all.
  - ajanuary 4y ago
    > To be completely frank I've looked down on UK/EU broadcast techs a little ever since because being able to set everything to 25fps and forget about it is easy street. My experience has been the reverse. Because they can, people in UK/EU have historically cared much more about frame accuracy. It’s only in the last 10 years or so that people in North America have started caring about frame accuracy. In the past it’s been quite hard to do because of the non integer frame rate.
- axiolite 4y ago
  Parent was obvious talking about converting 25fps PAL video to 30fs NTSC frame rate, which happens ALL THE TIME... NOT about converting from film to PAL. You are arguing with no-one.
  - dylan604 4y ago
    Yes, I have no idea what I'm talking about. I forget that sometimes. However, maybe you've forgotten that a lot of 25fps was shot progressive so 25psf more than 50i so that the video conversion was 25->24->29.97 which happens all the time as well. Glad to know there's an expert on the boards I can have second guess me though. I'll hit you up next time I might think I know something from 30 years of experience
    - axiolite 4y ago
      > Glad to know there's an expert on the boards I can have second guess me though. I'll hit you up next time I might think I know something from 30 years of experience I suggest you get over yourself. I am indeed a video expert with decades of IVTC experience. The first line of your reply was: "but rarely does anyone actually do this" That is factually incorrect, no matter how many years of experience you may have.