I'm using ffmpeg to segment files for use in MSE. I've tried dozens of combinations of flags. No matter what I always get a frame rate that can't possibly be right, specifically 1k frames per second. Here's what I see when I inspect one of the resulting segments.
ffmpeg -i test000.webm
Input #0, matroska,webm, from 'test000.webm':
encoder : Lavf57.56.100
Duration: 00:00:09.01, start: 0.000000, bitrate: 1047 kb/s
Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv), 1920x1080, SAR 1:1 DAR 16:9,1k fps
, 29.97 tbr, 1k tbn, 1k tbc (default)
By the way, my source, my original, unsegmented webm file shows the fps as 29.97.
Why does it do this and how do I fix it?