Hi, I'm trying to verify that the keyframes of videos we are using are properly aligned. I've found ffprobe to extract the some info but I'm not sure what data I should be comparing.
This is so that we can do some adaptive bitrate switching using an SMIL file for RTMP, HLS and eventually MPEG-DASH. I've been reading that they keyframes should be a constant 3 seconds apart. Hopefully someone has some experience in this. [FRAME] media_type=video key_frame=1 pkt_pts=0 pkt_pts_time=0.000000 pkt_dts=0 pkt_dts_time=0.000000 best_effort_timestamp=0 best_effort_timestamp_time=0.000000 pkt_duration=100 pkt_duration_time=0.033333 pkt_pos=48 pkt_size=2950 width=1280 height=720 pix_fmt=yuv420p sample_aspect_ratio=N/A pict_type=I coded_picture_number=0 display_picture_number=0 interlaced_frame=0 top_field_first=0 repeat_pict=0 [/FRAME] [FRAME] media_type=video key_frame=0 pkt_pts=100 pkt_pts_time=0.033333 pkt_dts=100 pkt_dts_time=0.033333 best_effort_timestamp=100 best_effort_timestamp_time=0.033333 pkt_duration=100 pkt_duration_time=0.033333 pkt_pos=3136 pkt_size=140 width=1280 height=720 pix_fmt=yuv420p sample_aspect_ratio=N/A pict_type=B coded_picture_number=2 display_picture_number=0 interlaced_frame=0 top_field_first=0 repeat_pict=0 [/FRAME] [FRAME] media_type=video key_frame=0 pkt_pts=200 pkt_pts_time=0.066667 pkt_dts=200 pkt_dts_time=0.066667 best_effort_timestamp=200 best_effort_timestamp_time=0.066667 pkt_duration=100 pkt_duration_time=0.033333 pkt_pos=2998 pkt_size=138 width=1280 height=720 pix_fmt=yuv420p sample_aspect_ratio=N/A pict_type=P coded_picture_number=1 display_picture_number=0 interlaced_frame=0 top_field_first=0 repeat_pict=0 [/FRAME] [FRAME] media_type=video key_frame=0 pkt_pts=300 pkt_pts_time=0.100000 pkt_dts=300 pkt_dts_time=0.100000 best_effort_timestamp=300 best_effort_timestamp_time=0.100000 pkt_duration=100 pkt_duration_time=0.033333 pkt_pos=3414 pkt_size=140 width=1280 height=720 pix_fmt=yuv420p sample_aspect_ratio=N/A pict_type=B coded_picture_number=4 display_picture_number=0 interlaced_frame=0 top_field_first=0 repeat_pict=0 [/FRAME] _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
