Import: Premiere seems to cut out frames

Forum|Forum|2 years ago
November 29, 2023
2 replies
1189 views

Hi there...
recently I was importing a video of a somehow lagging webpresentation. The imported video was significantly shorter than the original (frome 12:43 minutes down to 12:20). And the seperated audio file was out of sync, not from the beginning, but starting relatively early in the video.
I think Premiere somehow drops frames who appear to be multiple times the same, but in reality it was just a regular recording of a lagging presentation.
If that is the case, how can I prevent Premiere from doing this? Or is it something else?

Thanks BR Andre

Import

This topic has been closed for replies.

Correct answer R Neil Haugen

There is a high probability that this is a VFR issue ... variable frame rate, not unusual for web recordings and drones too. Simply transcoding though does not convert the media to CFR, constant frame rate. It's still VFR, just in a different codec.

Handbrake has a little 'radio' button you need to click called 'CFR' ... AND ... you also need to set a specific number framerate in the framerate option. Then it converts.

ShutterEncoder can also convert, but for some reason they've moved the convert to CFR option from the general settings to the Preferences for the app. So you need to find those, there's an icon sort of thingie upper left of the UI that is their Prefs. Then find the option to convert to CFR, which takes some scrollling.

R Neil HaugenCorrect answer

Legend

There is a high probability that this is a VFR issue ... variable frame rate, not unusual for web recordings and drones too. Simply transcoding though does not convert the media to CFR, constant frame rate. It's still VFR, just in a different codec.

Handbrake has a little 'radio' button you need to click called 'CFR' ... AND ... you also need to set a specific number framerate in the framerate option. Then it converts.

ShutterEncoder can also convert, but for some reason they've moved the convert to CFR option from the general settings to the Preferences for the app. So you need to find those, there's an icon sort of thingie upper left of the UI that is their Prefs. Then find the option to convert to CFR, which takes some scrollling.

Everyone's mileage always varies ...

Andre_27Author

Inspiring

cool thanks I'll check that out. sorry I'm a noob with premiere^^

Andre_27Author

Inspiring

sorry to say, but that didn't work...

B

Bill Sprague

Community Expert

Can you explain how you recorded the video? Can you post a description of the file including MediaInfo data?

Andre_27Author

Inspiring

well I received the severeral files from a client in order to cut them together. On one part (the lagging part) the mentinoned issue occured. Original file was webm, I tried different conversion apps, handbrake + webapps. Comparing actual webm with mp4 was fine, both same length. But after importing into Premiere the runtime was shorter (at the end of the video there are indeed black screens and what looks like stills (recorded lag of transmission), but throughout the video es well. Then I discovered the issue with the audio, which then lead to my assumption of missing frames. Theres pretty much no metadate attached.

Andre_27Author

Inspiring

oh and the results differ from using handbrake or converter app (web) for webm to mp4 after importing with the outcome of a few seconds.

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