Skip to main content
M
Markus_D
Participant
August 23, 2018
Answered

Premiere Pro export 10fps vs 25fps = lower file size?

  • August 23, 2018
  • 2 replies
  • 2300 views

I tried both, a source of 25fps and 10fps screen recording of slides exporting with H.264 in HD,
but when switching between 10fps and 25fps output there is no file size difference in the estimate
and only a marginal difference with the actual rendered files!

Shouldn't the file size be dramatically reduced?

I read elsewhere "If you cut the number of frames in half, the video file size will be cut in half".

Apart from choosing a lower video & audio bitrate to achieve that, I am hoping to achieve a smaller file size by going down to 10fps,

since a high frame rate is not required for slow-moving slides and other apps are able to save recordings to 50mb for about 1hr length instead of premiere 10x that!

Is AME really not that good with exporting lower fps or am I missing something?

This topic has been closed for replies.
Correct answer excited_Genie16B8

File size = bitrate x duration.  Parameters like codec, resolution, and frame rate will affect quality, but not file size.

2 replies

E
excited_Genie16B8Correct answer
Legend
August 24, 2018

File size = bitrate x duration.  Parameters like codec, resolution, and frame rate will affect quality, but not file size.

    R
    Community Expert
    Richard M KnightCommunity Expert
    Community Expert
    August 23, 2018

    Try dropping the bit rate, that and the programme length are the only things that affect file size.

    Do a forum search for 'file size'

    S
    SAFEHARBOR11
    Participating Frequently
    August 23, 2018

    "Try dropping the bit rate, that and the programme length are the only things that affect file size."

    I will add that if you lower the bit rate, also lowering the frame rate means there are less frames to compress and so 10fps at a low bit rate should look better than 25fps at same low bit rate. Each frame will have more data to work with when there are less frames.

    Thanks

    Jeff

      M
      Markus_DAuthor
      Participant
      August 24, 2018

      Please, everyone, let's try to stay on topic of the actual question, it's mainly about lower fps affecting file size ?!

      I know about changing the codec / bitrate settings (as well as the obvious of durations ) or lower resolution for a better quality.

      SAFEHARBOR11 are you saying that lower fps should not affect file size at all but only the quality?
      Meaning I can reduce bitrate even lower to achieve similar quality in comparison of 10fps vs 25/30fps rendered video?

      It seems even professionals struggle in this area from what I read and hear. I want to get to the bottom of how other apps are able to achieve much lower file size with yet a way-way better quality then Premiere Pro / AME.

      If I lower the bitrate too low you will see artefacts and banding issue. But I also notice that even though the frames are static for a very long time they have issues, pixelating/going out of focus in an out every second or so.

      The ultimate question is: What is the ideal setting for rendering source with static frames / power point slideshow screen recording to10fps to avoid any issues with acceptable bitrate settings for 720p?

      EDIT: I should have mentioned that my source is .mov h.264 perhaps this is another factor that Pr struggles with.

      I'm using OBS for screen recording which supports: flv, mp4, mov, mkv, ts, m3u8 - with different quality High, Indistinguishable to lossless where the latter is not practical.

      Terms & ConditionsAccessibility statement
      Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices