Checking keyframe interval?

Question

How can I check keyframe interval of a video file?

all I can see in ffmpeg output is:

  Metadata:
    metadatacreator : Yet Another Metadata Injector         


        

Answer 1

The following command will give you the offsets of all key Frames in the Video

ffprobe -show_frames -select_streams v:0 \
        -print_format csv Video.mov 2> /dev/null |
stdbuf -oL cut -d ',' -f4 |
grep -n 1 |
stdbuf -oL cut -d ':' -f1

Note that the command might respond a little late. Have patience :-)

The ffprobe command gives you the frame level details in CSV format. Rest is a smart combination of cut and grep commands.

cut -d ',' -f4

filters the fourth column - this refers to the 'key_frame' flag.

grep -n 1

filters the key-frames only, and shows their line numbers in the CSV feed.

The

stdbuf -oL

with the cut command manipulates the buffer of the cut command.