Show a line containing various information for each input video frame. The input video is not modified.

This filter supports the following options:

checksum

Calculate checksums of each plane. By default enabled.

The shown line contains a sequence of key/value pairs of the form key:value.

The following values are shown in the output:

n

The (sequential) number of the input frame, starting from 0.

pts

The Presentation TimeStamp of the input frame, expressed as a number of time base units. The time base unit depends on the filter input pad.

pts_time

The Presentation TimeStamp of the input frame, expressed as a number of seconds.

fmt

The pixel format name.

sar

The sample aspect ratio of the input frame, expressed in the form num/den.

s

The size of the input frame. For the syntax of this option, check the "Video size" section in the ffmpeg-utils manual.

i

The type of interlaced mode ("P" for "progressive", "T" for top field first, "B" for bottom field first).

iskey

This is 1 if the frame is a key frame, 0 otherwise.

type

The picture type of the input frame ("I" for an I-frame, "P" for a P-frame, "B" for a B-frame, or "?" for an unknown type). Also refer to the documentation of the AVPictureType enum and of the av_get_picture_type_char function defined in libavutil/avutil.h.

checksum

The Adler-32 checksum (printed in hexadecimal) of all the planes of the input frame.

plane_checksum

The Adler-32 checksum (printed in hexadecimal) of each plane of the input frame, expressed in the form "[c0c1c2c3]".

mean

The mean value of pixels in each plane of the input frame, expressed in the form "[mean0mean1mean2mean3]".

stdev

The standard deviation of pixel values in each plane of the input frame, expressed in the form "[stdev0stdev1stdev2stdev3]".