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Question

Dropping Frames on Export

Forum|Forum|5 years ago
October 24, 2020
4 replies
7938 views

My last couple of projects have had footage drop frames only on export. This is happening in 14.5 and the current beta also.

I'm on Windows 10 with a Radeon GPU. Latest GPU drivers.

Footage is 100% 1080p 29.97 from 3 different cameras. The dropped frames are not affecting ONE of the cameras. So 2 cameras are dropping frames randomly. Playback in the timeline is flawless.

I've tried exporting h.264, HEVC, CBR, Unchecking Maximum Render Quality and last night I tried the CPU Render. I've cleared caches. The dropped frames change places with each export attempt.

I'm frustrated beyond the pale!

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Averdahl

Community Expert

Footage is 100% 1080p 29.97 from 3 different cameras.

Dropping frames at export suggest to me that there is a mis-match somewhere. If you have 1080p 29.97 footage the sequence you edit the footage in must be set to 1080p 29.97 and you have to make sure that you export to 1080p 29.97. If you export 1080p 29.97 to 1080p 25 you will indeed see dropped frames. If you have cam 1 on one timeline, cam 2 on another timeline and cam 3 on another timeline that you bring down in a fourth timeline using the multi camera feature, make sure that all three timelines are set to 1080p 29.97. (And double check that the source footage really are 1080p 29.97. It is easy to set the camera wrong.)

Since only two cameras are dropping frames a mis-match may not be the cause, so i ask you: How and where do you determine that there are dropped frames? What do you see instead of the frame/s you expect to see?

And, from what camera are the footage, Iphone or ARRI Alexa, or?

EricLeslieAuthor

Participating Frequently

I just looked back over ALL of my clips and they are in fact all 1080 29.97 and I'm sure that I exported the same.
Dropped frames show up as black frames. The audio can still be heard.

As reported by MediaArea.net

Camera 1 is a Nikon Z6

24.3Mb/s 1920*1080 at 29.970 (30000/1001) FPS, AVC (High@L4.1) (2 REf Frames)

Camera 2 is a DJI Mavic Air 2

36.2Mb/s, 1920*1080 (16:9), at 29.970 (30000/1001) FPS, HEVC (Main@L4@Main)

Camera 3 is a GoPro Hero 8

42Mb/s, 1920*1080 (16:9), at 29.970 (30000/1001) FPS, HEVC (Main@L5.1@Main)

I will try using the Prores previews next.

Averdahl

Community Expert

Thanks.

It sems that you missed my answer earlier in this thread. Try it and report back:

"...the dropped frames just moved to new places...

Then this is what you need to do: FAQ: How to clear your cache in Premiere Pro 2019"

M

Michael Grenadier

Legend

Try using smart render. Change your preview format in your sequence settings to a high quality all i-frame format like prores 422(hq) and render your entire sequence. If it plays properly from the timeline, when you export make sure "use previews" is checked.

And if you want to track down the problem, please tell us the properties of your sources.

mediainfo is a useful tool to tell us frame rate, codec, etc.

https://mediaarea.net/en/MediaInfo/Download

Sounds like there may be an issue with 2 of your cameras. Might tell us the models of all 3 cameras

Ann Bens

Community Expert

Post compleet computer specs and setup.

EricLeslieAuthor

Participating Frequently

Ryzen 5 2600

32GB RAM

Radeon RX 480
Windows 10 Home

Editing from an m.2 SSD
Fresh install of windows. Latest drivers. Do you need anything else?

I changed the Renderer to Software in my previous testing. Is that different than changing hardware encoding to software in the h.264 settings?

I just exported it using the Software Encoding option, NOT the mercury software setting and there are not any dropped frames. Is this a bug or do I have to live with the performance penalty of choosing the software encoder?

EricLeslieAuthor

Participating Frequently

I take it back, I reviewed the edit and the dropped frames just moved to new places, so I had to watch through all the way to find them. The problem remains.

Peru Bob

Community Expert

Try turning off Hardware encoding in the export settings.

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