I use the Blender VSE for overlaying live video footage from a camcorder (with noisy audio from the camcorder) with good quality audio straight from the mixer, captured at a live event.
I need to manually align the two audio tracks, after which I remove the camcorders' original audio track.
However, after 10 minutes, there's a lag between the two. It slight, but annoying. After 20 minutes, it's symply out-of-sync.
Q: how can I avoid this difference?
Tried so far: -The problem appears in both the preview and in the rendering. (so it's not just down to the av-sync button) - The frame rate of Blender's rendering and the video match: 25 fps - The recording frequencies of both the audio-file and the video file are 48000 Hz - The video has a constant bit-rate
Camcorder track (video):
Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
Stream #0:0: Audio: pcm_s16le ( / 0x0001), 48000 Hz, 2 channels, s16, 1536 kb/s