Inquiry about issues with 60fps video interpolation in long videos, duration and audio sincronization

Dear hzwer,

First of all, I want to congratulate you on the amazing work you've done with the RIFE repository. The quality of the video interpolation is impressive and has been incredibly useful for several of my projects.

However, I've encountered some issues when working with long videos. While RIFE successfully converts videos to 60fps, I've noticed that the duration of the video doesn't remain the same, and even when I try to fix this using setpts in FFmpeg, the audio is not properly synchronized. I'm currently using Model 4.25, and I was wondering if you could recommend a different model that might handle these cases better.

Additionally, I wanted to ask if there's a way to use multiple GPUs when running RIFE. Right now, I can only use one GPU, and I'd love to take advantage of multiple GPUs to improve performance, especially when working with long videos.

I really appreciate your attention and any suggestions you might have. Thanks again for your incredible work!

Best regards,

The issue names no files, tests, or entry points. Start by reproducing long-video interpolation with Model 4.25 and the reported FFmpeg duration and audio-sync problems; separately investigate the request for multi-GPU support. Done would require a confirmed diagnosis and clearly scoped changes, but the stale thread provides no settled implementation path.