====== ffmpeg - Video bit rate ======

===== Get the bitrate of a video =====

<code bash>
ffprobe "0.mkv" 2>&1 | grep -E "bitrate|Video:"
</code>

returns:

<code>
  Duration: 00:23:30.34, start: 0.000000, bitrate: 4115 kb/s
  Stream #0:0(eng): Video: av1 (Main), yuv420p(tv, bt709/unknown/unknown, progressive), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn (default)
</code>

----

===== Set the bitrate of a video =====

To keep the same image details use the following formula to calculate the output video bit rate:

<code>
-b:v value = input_file_size_KB / duration_sec / 100
</code>

----

===== Example =====

<code>
460520KB / 120sec / 100 = 38.37
</code>

result:

<code>
-b:v 38M
</code>

----