Audio/video sync issues

[damir_9980]

I tracked and mixed a drum playthrough for a drummer and we video-ed the process with a phone (samsung s22 ultra), which obviously has VFR.
When I sync the mixdown audio with video in Adobe Premiere or Davinci Resolve, it is spot on. Inside those projects it is synced without issues. However, once I export it and upload to Youtube I get visible out of sync result there, nothing like how it flows in the video editing software.
I exported the audio (through Studio One to 44.1khz 16bit) the way I would export my final audio mix for master.

[Ishan Y]

Hi damir_9980,

Sorry for the issue. Please try transcoding your VFR media using Handbrake (https://adobe.ly/3Z5ofAq) and replacing your project's source files. Let us know if the exported media plays back correctly.

Thanks,

Ishan

Please tag me (@) in your replies so that it notifies me and helps me respond promptly.

[maksh95923910]

Hi,

The issue likely comes from the Variable Frame Rate (VFR) footage from your phone. While it looks fine in Premiere or Resolve, VFR can cause desync issues after export, especially on platforms like YouTube.

Try these steps:

1. Convert to Constant Frame Rate (CFR): Use tools like HandBrake to convert the video before importing.
2. Match Audio to 48kHz: Export your audio at 48kHz, 16-bit, as YouTube prefers this over 44.1kHz.
3. Check Export Settings: Ensure frame rates and codecs match YouTube’s recommendations.

Let me know how it goes!

[damir_9980]

I tried with the handbreak a few days ago. I encoded the video to cfr and I even removed the original (phone) sound out of it. However, the only thing I accomplished is that the audio issue now became constant - ie it is equally delayed after the upload to youtube

[maksh95923910]

Just to clarify, when you export the video from Premiere Pro and play it on a video player (in Windows or Mac) before uploading to YouTube, does it work fine without any delayed or out-of-sync audio?

[damir_9980]

Yes, on my computer (win) it plays fine. As soon as it is uploaded on youtube, it goes out of sync.

[maksh95923910]

Thanks for the clarification! Since it works fine on your computer but goes out of sync after uploading to YouTube, it seems like the issue may be related to how YouTube processes the video.

Here are a few suggestions to try:

1. Double-check export settings:
   When exporting, ensure that you're using H.264 codec for video and AAC codec for audio, with a 48kHz sample rate for audio. These settings are YouTube's recommended export parameters.

2. Upload smaller segments:
   Try uploading a shorter test clip to see if the sync issue still happens. This can help determine whether the issue is file-related or something in the upload process.

3. Use YouTube Studio:
   Try uploading through YouTube Studio rather than directly through your browser. This may sometimes help with syncing issues.

4. Clear cache or try a different browser:
   Sometimes, browser issues or cached files can cause YouTube to process the video incorrectly. Clear your browser cache or try uploading using a different browser.
   
   

If none of these help, there might be something related to YouTube's processing itself. Sometimes it takes a while for their system to process and sync everything correctly. Keep me posted on how it goes!

[barat munji]

Try recompressing to CFR Prores with Apple Compressor, this seems to do the job better thatn adobe media encoder for iphone clips.