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J
Justin_M95
Participant
April 28, 2020
Question

Audio Out of Sync After Premiere Export? I've tried everything. HELP!!!!

  • April 28, 2020
  • 1 reply
  • 901 views

Hi Everyone,

 

This is kind of long, but please bear with me.

 

I just finished editing a music video, and when I playback the edit on my timeline, everything is perfect. But as soon as I export the video, the audio gets all out of sync. The audio is in sync for some of the clips, but out of sync for some of the others, and the gap becomes greater over time it seems. I cannot for the life of me figure out how to fix it.

 

Does it have to do with the latency during playback inside of premiere? Why are some clips synced and others not? Does it have anything to do with the bitrate settings? Frame rate settings? I have tried both constant and variable bit rates, and I have tried many different combinations of audio settings for the export (different KBPS and Hz). The export settings for framerate match those of the source media. 

 

Furthermore, the final export seems to realign with the audio on the second playback? As if my computer needed additonal time to process the file? I have a very powerful editing computer with an abundance of RAM and storage space so I do not belive this to be the issue. The second playback is only better on my desktop, which is Windows. When I transfer the file to my mac or to my iphone, the audio stays out of sync no matter how many times I play it back.

 

There are several nested clips and also after effects compositions used in the video. Would this have any impact on the export as opposed to just premiere clips? I have seriously run out of ideas here.

 

If anyone has any idea what might be causing this PLEASE let me know. The client is expecting the media this weekend. He has already seen the clip via playback inside of Premiere, but I cannot send him the exported file until I can fix the audio.

 

(Additional note, I use bluetooth speakers because my monitor does not have internal speakers. Would this add additional latency during editing? This still doesnt seem to make sense though because it even is out of wack when watching the exported clip with the same speakers...)

 

I will be forever greatful if someone can answer this for me!!!

 

This topic has been closed for replies.

1 reply

P
Community Expert
Phillip HarveyCommunity Expert
Community Expert
April 28, 2020

Can you tell us more about the media you are working with? The best way to see a lot of info about your media is from the tree view of Media Info. That being said, this sounds like exactly what happens with Variable Framerate media that you would get from footage coming from a Phone or from Screen Capture. I will provide some suggestions based on that assumption.

Here is Adobe's article on it and perhaps the VFR is subtle enough that the Premiere option will work for you: https://community.adobe.com/t5/premiere-pro/faq-how-to-work-with-variable-frame-rate-vfr-media-in-premiere-pro/td-p/10348229?page=1

 

(Note that Variable Frame Rate is not the same thing as Variable Bitrate).

 

For other info on VFR, including how you would transcode your media to a constant framerate prior to editing, check here: https://www.reddit.com/r/VideoEditing/wiki/faq/vfr

 

If it is indeed VFR that you're dealing with and it's severe enough that you need to deal with it outside of Premiere, you can transcode your problem clips to a constant framerate and then replace your footage inside your project with the new clips and they will update in your edit. Because the timing difference between everything, you may need to slip a few of your clips to retime the edit, but you wouldn't need to start from scratch.

    J
    Justin_M95Author
    Participant
    April 28, 2020

    The media was shot on a Lumix GH5. I dont belive is is VFR?  Most shots were shot at 29.7 FPS and a couple slow motion shots were shot at 93FPS (weird number I know), but the way the camera writes the media it plays back in 29.7fps? At least thats what the properties of the clip say (not my camera so im not entirely familiar with it). The audio is an MP3 file sent to me from the talent. I checked the properties of it, and it says it is 160kbps and 44100Hz which I made sure to match on the export settings. 

     

    I can post pictures of the actual properties windows in a second so you can look at them for yourself. 

     

    And also, I am using the most current version of Premiere to my knowledge.

    P
    Community Expert
    Phillip HarveyCommunity Expert
    Community Expert
    April 28, 2020

    Yeah you're probably not dealing with VFR issues then. That's good. It also means the culprit may be less obvious (at least to me).

    My mind does go to the sample rate: maybe making sure your sequence also matches the export sample rate - although I don't know that that's it. Going to research a little and hopefully some reinforcements jump in with other ideas 🙂

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