measure/perf fails on mp4 streams

[dvrogozh]

media-delivery/tests/measure-perf.bats

Line 265 in 45999e5

@test "measure perf --skip-perf raw mp4" {

Started after 45999e5.

[dvrogozh]

media-delivery/measure/performance/MSPerf.py

Line 1418 in 45999e5

ffprobe_cmd = "ffprobe -hide_banner -loglevel panic -show_streams -i " + filepath + filename.rstrip() + " | grep -E '^height=|^r_frame_rate=|^codec_name=' " + " > " + ffprobe_dump

This happens because ffprobe will list all the sub-stream for mp4 including audio, subtitles, etc. And msperf will consider the last one actually which might not be video. I actually think this always was broken, but now it just got exposed.