ffmpeg failed to convert format

[ITtest1]

[hls @ 0x5559abe6e000] Could not find codec parameters for stream 0 (Video: bmp, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Output file #0 does not contain any stream
2021-12-19 12:39:11,186 ERROR run ffmpeg command failed: exitcode=1

link:https://b.baobuzz.com/m3u8/501961.m3u8?sign=2a6eecedd526ba4dd11cc5cf23f852fc