Participant

Question

25fps to 24fps

Forum|Forum|5 years ago
November 6, 2020
3 replies
3551 views

I am working with 25fps footage and putting it in a 23.976fps timeline and exporting the footage as 23.976fps. Does Premiere Pro do a good job of encoding the footage? Rather then interperting the footage, which I seem to to run into problems with at the moment.

I understand that it plays back 4% slower then it would at 25fps, but the export looks and sounds fine to me. There isn't much movement in the video, it's pretty static and I understand that movement can be jarring. Let me know if this is a good idea to do in general with an export.

This topic has been closed for replies.

S

Steve Griffiths

Inspiring

I don't have any additional thoughts over Richards good advice and don't know why it's not working for you in this case.

Perhaps as your original way of of dropping 25 into 23.976 timeline works then just stick with that?

If you need sync audio, that trumps anything else!

Though my next question is why do you need to export at 23.976?

M723552815Author

Participant

Hi Steve,

At my job all video is at exported at 23.976, to keep things consistent with all other videos.

I appreciate your help on this. After trying to mess with interpreting the footage and not getting the secondary audio match up, I've decided dropping 25fps in a 23.976 timeline (like I've been doing) works because I think it is the best solution in this situation.

Thanks again Steve!

R

Richard M Knight

Community Expert

The sample frequency of the audio, in this instance, does not matter. What you will have to do is change the length of the external sound track to match the video by using the 'rate stretch tool, shortcut 'R'

M723552815Author

Participant

I've never used the rate stretch tool, I'll check it out.

I should elaborate on the audio - the thing is there is audio with the video and then I have external audio as well that I am trying to match with the video and original audio. I'll try and use the rate stretch tool to see if I can match it to to the original audio as much as possible. Thanks for your help Richard.

S

Steve Griffiths

Inspiring

If as you say there's not much movement in the clips then dropping 25fps into a 23.976 timeline should be fine and Premiere Pro will handle it.

That said - in most cases - I would interpret the 25fps footage to 23.976 and live with the 4% slow down. You mention problems doing this - what problems have you seen when interpreting this way?

Another option is to drop 25fps into 23.976 timeline and apply 'optical flow' . Righ click a 25fps clip in the timeline > select Speed/Duration > leave at 100% but select 'optical flow' from the 'Time Interpolation' pull down. This will smooth out any frame jumps. The downside of this is significant render time.

Also you could consider dropping you clips into Media Encoder and changing the frame rate there.

Hope that helps.

M723552815Author

Participant

Hi Steve thank you so much for your response.

The problem I have with interpreting the footage to 23.976 is that have external audio I need to sync with the clip. The external audio is 32hz and no matter what I do the audio matches the timeline when I drop it in the 23.976 timeline. But once I interpret the footage the audio doesn't match. I tried making the audio 48hz and match it with interpreted footage but the audio becomes out of sync. Not sure how to match it. The original audio is 32hz so it should match even when interpreted I would think.

Let me know what you think I should do Steve. Thank you!

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