Show various filtergraph stats.

With this filter one can debug complete filtergraph. Especially issues with links filling with queued frames.

The filter accepts the following options:

size, s

Set video output size. Default is hd720.

opacity, o

Set video opacity. Default is 0.9. Allowed range is from 0 to 1.

mode, m

Set output mode, can be fulll or compact. In compact mode only filters with some queued frames have displayed stats.

flags, f

Set flags which enable which stats are shown in video.

Available values for flags are:

queue

Display number of queued frames in each link.

frame_count_in

Display number of frames taken from filter.

frame_count_out

Display number of frames given out from filter.

pts

Display current filtered frame pts.

time

Display current filtered frame time.

timebase

Display time base for filter link.

format

Display used format for filter link.

size

Display video size or number of audio channels in case of audio used by filter link.

rate

Display video frame rate or sample rate in case of audio used by filter link.

rate, r

Set upper limit for video rate of output stream, Default value is 25. This guarantee that output video frame rate will not be higher than this value.