Get video frames information with ffmpeg

Question

How can I retrieve information from video about byte number from which every frame starts, with using ffmpeg or something else?

Answer 1

You can try ffprobe:

$ ffprobe -show_frames input.mkv
...
[FRAME]
media_type=video
key_frame=0
pkt_pts=3240
pkt_pts_time=3.240000
pkt_dts=N/A
pkt_dts_time=N/A
best_effort_timestamp=3240
best_effort_timestamp_time=3.240000
pkt_duration=40
pkt_duration_time=0.040000
pkt_pos=18009
pkt_size=480
width=320
height=240
pix_fmt=yuv444p
sample_aspect_ratio=1:1
pict_type=P
coded_picture_number=76
display_picture_number=0
interlaced_frame=0
top_field_first=0
repeat_pict=0
[/FRAME]

• pkt_pos may be what you're looking for.
• If you only want info from the video stream add -select_streams v:0.
• See FFprobe Documentation and FFmpeg Wiki: FFprobe Tips for more examples.