We are developing ffmpeg processes monitor, in that , what is the best way to handle long running chunked post request.

from FFMPEG manpage:-
-progress url ( global )

Send program-friendly progress information to url.

Progress information is written approximately every second and at the end of the encoding process. It is made of “key=value” lines.

I captured HTTP request that ffmpeg performs for progress:

POST /progress.php HTTP/1.1
Transfer-Encoding: chunked
User-Agent: Lavf54.29.104
Accept: /
Connection: close
Host: localhost

8f
frame=91
fps=0.0
stream_0_0_q=23.0
total_size=205437
out_time_ms=4388571
out_time=00:00:04.388571
dup_frames=1
drop_frames=0
progress=continue

92
frame=210
fps=209.5
stream_0_0_q=11.0
total_size=569264
out_time_ms=9357642
out_time=00:00:09.357642
dup_frames=1
drop_frames=0
progress=continue

92
frame=368
fps=244.8
stream_0_0_q=4.0
total_size=814739
out_time_ms=15952109
out_time=00:00:15.952109
dup_frames=1
drop_frames=0
progress=continue

94
frame=440
fps=219.0
stream_0_0_q=10.0
total_size=1921815
out_time_ms=18924263
out_time=00:00:18.924263
dup_frames=1
drop_frames=0
progress=continue