Anton Khirnov f9657b7443 fftools/ffmpeg: simplify tracking -readrate start time
There is no point in having a per-stream wallclock start time, since
they are all computed at the same instant. Keep a per-file start time
instead, initialized when the demuxer thread starts.
2023-05-15 13:32:01 +02:00
..
2022-12-01 11:21:14 +01:00
2022-07-23 11:53:19 +02:00