Export Issue: Music / Video glitch back a few frames

[Joey-C]

I'm trying to export a video after finishing some edits with Premiere Pro. While exporting, however, the video or audio (with multiple attempts) glitch back one second. I'm running Premiere on MacBook Pro '21 M1 Chip. Tried running the software with Rosetta, didn't help. Tried disabling hardware accelerated encoding, didn't help. Tried multiple export formats, didn't help. Anyone knows what could be the issue?

[John V Knowles - WM]

Sorry to hear you're having issues!

Can you define what you mean by "glitch back one second" though? Do you mean it's out of sync?

[Joey-C]

Thanks for the reply!

If it's the audio, it jumps one second backward. For instance, the music plays to 00:26, and then it glitches back to 00:25, when the video is playing normally to 00:27. And then the music simply plays 2 seconds out of sync.

[Ishan Y]

Could you share your source file properties? (Project Panel > Right-click on source file > Properties). We need to check if the source file is in variable frame rate. If it is, please transcode the file using Handbrake.  

[Joey-C]

Here's all the clips / audios I used. It was just a quick fix on an existing video, so there' not many clips in there.

[Ishan Y]

Thanks for sharing the info. Your video doesn't seem to be in variable frame rate. Could you right-click on the audio clips on the timeline and select Render and Replace? Let us know if that helps.

[Joey-C]

Thanks for the reply!

I tried it out - didn't work. Or rather, it's now broken in another way.

Now the video STARTS with the video and audio out of sync. Half way through the video, however, it glitches FORWARD - and then the video and audio plays IN SYNC with no problem until the end.

[Joey-C]

Update: I exported again, now the video starts and ends in sync, but there is 20 seconds in the middle of the video when the video glitched forward first and then back. It is a full raw clip, not between clip transitions.

[John V Knowles - WM]

Also, try converting the Mp3s to WAV files using Media Encoder. Compressed audio is never a good option and sometimes Mp3s can cause glitchy behavior.

[Joey-C · Accepted solution]

I just figured it out with the hint from Ishan Y - for this video, at least. I'll see if this works with my later projects...

Render and Replace for audio does not do the job, but Render and Replace the clips solved the problem. What may be the most helpful is simply Render and Replace all clips and audio prior to export next time. A huge thank you to all who've helped!

[Ishan Y]

Glad to hear you found a workaround! Feel free to reach out to us again.