% ffprobe big_buck_bunny_1080p_h264.mov -select_streams v -show_frames -show_entries frame=frame_type,pkt_pts_time,pkt_dts_time,pict_type -of compact | head

frame|pkt_pts_time=0.000000|pkt_dts_time=-0.041667|pict_type=I
frame|pkt_pts_time=0.041667|pkt_dts_time=0.041667|pict_type=B
frame|pkt_pts_time=0.083333|pkt_dts_time=0.083333|pict_type=P
frame|pkt_pts_time=0.125000|pkt_dts_time=0.125000|pict_type=B
frame|pkt_pts_time=0.166667|pkt_dts_time=0.166667|pict_type=P
frame|pkt_pts_time=0.208333|pkt_dts_time=0.208333|pict_type=B
frame|pkt_pts_time=0.250000|pkt_dts_time=0.250000|pict_type=P
frame|pkt_pts_time=0.291667|pkt_dts_time=0.291667|pict_type=B
frame|pkt_pts_time=0.333333|pkt_dts_time=0.333333|pict_type=P
frame|pkt_pts_time=0.375000|pkt_dts_time=0.375000|pict_type=B

% ffmpeg -ss 0.5 -i big_buck_bunny_1080p_h264.mov -t 5 -c copy cut.mov

% ffprobe cut.mov -select_streams v -show_frames -show_entries frame=frame_type,pkt_pts_time,pkt_dts_time,pict_type -of compact | head

frame|pkt_pts_time=0.041667|pkt_dts_time=0.041667|pict_type=P
frame|pkt_pts_time=0.083333|pkt_dts_time=0.083333|pict_type=B
frame|pkt_pts_time=0.125000|pkt_dts_time=0.125000|pict_type=P
frame|pkt_pts_time=0.166667|pkt_dts_time=0.166667|pict_type=B
frame|pkt_pts_time=0.208333|pkt_dts_time=0.208333|pict_type=P
frame|pkt_pts_time=0.250000|pkt_dts_time=0.250000|pict_type=B
frame|pkt_pts_time=0.291667|pkt_dts_time=0.291667|pict_type=P
frame|pkt_pts_time=0.333333|pkt_dts_time=0.333333|pict_type=B
frame|pkt_pts_time=0.375000|pkt_dts_time=0.375000|pict_type=P
frame|pkt_pts_time=0.416667|pkt_dts_time=0.416667|pict_type=B