50fps source, 25fps timeline, 1/2 speed 25fps delivered??

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wildtypitch

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50fps source, 25fps timeline, 1/2 speed 25fps delivered??

PostWed Mar 21, 2018 12:32 pm

Having an issue trying to get Resolve to output 50 fps source footage at 25 fps without altering the speed. At the moment my timeline is set to 50fps playback so plays fine in edit, timeline is set to 25fps. But any delivered output is half speed. I'd rather it drop half the frames than stretch 50fps to 25. What am I missing?
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Uli Plank

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostWed Mar 21, 2018 5:02 pm

Make sure that your clip shows 50 fps under it's attributes, but set the TL to 25.
You footage should run at normal speed then.
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wildtypitch

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostWed Mar 21, 2018 5:47 pm

Uli Plank wrote:Make sure that your clip shows 50 fps under it's attributes, but set the TL to 25.
You footage should run at normal speed then.

Confirmed all clips are set to 50 and timeline is 25.
Still output is 25fps and half speed
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Dwaine Maggart

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostWed Mar 21, 2018 9:02 pm

Are you using Individual Clips or Single Clip render mode?
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wildtypitch

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostWed Mar 21, 2018 10:59 pm

Single clip output, in out range selected. Comprised of multiple 50fps clips.
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wildtypitch

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 2:03 am

Very strange, so the output clip is twice the intended length, The audio is the right length and finishes half way. the movie stops half way ( at the intended end) but having only played half the footage at half speed.
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Dwaine Maggart

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 4:18 am

Something seems wrong. If you leave the clip frame rate at it's native mode (50FPS), the clip should play at the correct speed on the 25 FPS timeline. Frames will be dropped to make that happen.

But you said you've set your playback rate to 50 FPS. That SHOULD make the clip play back at double speed. If it's playing back normally, then something is wrong somewhere.

Something is making the clip play at half speed. And that's why it's rendering at half speed.

If you had changed the clip attributes frame rate to 25 FPS, this is the exact behavior I would expect. Can you right click the clip in the Media Pool, select Clip Attributes, and make sure the Video Frame Rate is 50, and not 25?
Dwaine Maggart
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Andrew Kolakowski

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 10:21 am

As a test you can also try new project instead of doing it in existing one.
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wildtypitch

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 1:41 pm

Yes, can't try that now but I'm pretty sure everything is set up right. I have a being suspicion that I set this project up with the timeline in the wrong frame rate then changed it after inserting some clips in the timeline and doing some workaround solution to change it which likely has resulted in this problem. That's was a long time ago. Since have done a lot of work. Sounds like I'm going to have to start from scratch.
Last edited by wildtypitch on Fri Mar 23, 2018 10:42 am, edited 1 time in total.
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Ryan Payne

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 9:44 pm

Jumping in here to say ive had an issue with the same thing.

Created a premiere XML from the premiere project which had a timeline of 25p with some 50p footage conformed to play at 25 in slow motion but it also had some of the 50p footage play back at normal speed. It also had an interview shot at 25p.

I could not for the life of me figure out how to ensure each clip played back correctly, using each of the frame rate options when importing the XML (resolve, final cut etc.) Would cause some clips to show up as still frames, using none caused all of the footage that was 50p to play back/ render in slow motion.

The clip attributes had the fps set to 50 but greyed out and I was unable to change it. Having everything in slow motion moved each clip along it's in and out points.

In the end I just had to created a whole new project with the source clips shot at 50p to render them all at 50p, then relink them as offline media in premiere. This took ages, wasted a lot of time.

Surely there's a better way? But anyway ops issue may be caused because it came from an XML?
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Andrew Kolakowski

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 9:58 pm

Well, going over XML when you change speed, have different fps assets etc. is is asking for problems for sure. Often this doesn't work inside single app.
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Ryan Payne

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 11:02 pm

Andrew Kolakowski wrote:Well, going over XML when you change speed, have different fps assets etc. is is asking for problems for sure. Often this doesn't work inside single app.


Mm what would be the best way to tackle this in the future? It must be edited in premiere the come over to resolve.
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Andrew Kolakowski

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Re: 50fps source, 25fps timeline, 1/2 speed 25fps delivered?

PostThu Mar 22, 2018 11:22 pm

Shot end edit in native fps :D
Seriously - I don't think there is an easy and good solution for it.
FCP XML is not going to be interpreted by different apps in the same way as different apps do things differently. Even fairly simple things like fade don't translate well sometimes, so things like e.g. speed change will about never translate well. Maybe I'm to sceptic. Any fps change is always a huge problem- even halving fps is in reality problematic as motion blur is different.

Some solution- if you do use speed change etc. then normalise (by making new files, not by in-app interpretation) all clips to final fps and then edit and exchange over XML.

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