Importing mp4 with multiple audio tracks incorrectly shows V1 and A1 2 seconds shorter than A2, A3

[fusconed]

I'm recording gameplay with multiple audio tracks in OBS to MKV. I then use ffmpeg to convert to mp4 with 3 audio tracks.

When I import the resulting output file to Premiere Pro Version 24.3.0 (Build 59) and drag it onto my timeline, the V1 and A1 tracks are almost 2 seconds shorter, seemingly cutting off the first 2 seconds (or really 00:01:59). Ultimately that ends up causing V1 and A1 to be ahead by that amount compared to V2 and V3.

If I open the same file in Audacity, all 3 audio tracks are the same length and sync'd up correctly, or if I watch it in Windows Media Player and listen to each track individually they all sound sync'd up as well, so it appears to be just an issue with Premiere Pro.

Any ideas what I can do to resolve this? Is this some weird Premiere setting, or is it a bug?

[Peru Bob]

Try using Handbrake or Shutter Encoder to covert to mp4 instead of FFmpeg.

[Tom Nord]

MKV support is now in Premiere Pro Beta: https://community.adobe.com/t5/premiere-pro-beta-discussions/now-in-beta-support-for-h-264-in-mkv/m-...