FFmpeg records A/V just a little out of sync

RetroArch Windows devices
#1

Hello,

RetroArch (mupen64plus core) FFmpeg records audio and video just a little out of sync. video came later than audio. but gameplay is fine. Do you have any solution?

RetroArch : v.1.0.0.2 libretro : mupen64plus command line : retroarch -L libretro/mupen64plus_libretro.dll --record records/record.mkv --recordconfig records/config.cfg “roms/n64/Wave Race 64 (J) [!].zip”

Added the following to default settings. [retroarch.cfg] video_gpu_record = “true”

[records/config.cfg] vcodec = libx264rgb acodec = flac sample_rate = 48000 threads = 0 video_preset = ultrafast

[.retroarch-core-options.cfg] mupen64-framerate = “fullspeed” (original: audio and video are not synchronized after recording.)

Thanks :slight_smile:

#2

Mupen might not be reporting the exact correct refresh rates. You might be able to remux the mkv with exact refresh rate to fix it, but dunno.

#3

Thank you for your reply :slight_smile:

I added approximately 333ms delay audio track during muxing. The results are that the problem this time has been resolved.