#7986: Initial EXT-X-PROGRAM-DATE-TIME rounded to integer -------------------------------------+------------------------------------- Reporter: pavelpi | Type: defect Status: new | Priority: normal Component: avformat | Version: git- Keywords: hls | master timestamp | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- '''Summary of the bug:''' recording in DASH format (HLS) outputs m3u8 where EXT-X-PROGRAM-DATE-TIME is always floored to seconds while millisecond digits are available in the timestamp. '''How to reproduce:''' {{{ ffmpeg -f v4l2 -framerate 25 -video_size 720x480 -standard pal -i /dev/video0 -vcodec libx264 -r 25 -preset medium -keyint_min 250 -g 250 -f hls -hls_flags +program_date_time -hls_segment_type fmp4 -hls_fmp4_init_filename now.mp4 -use_localtime 1 -hls_list_size 0 -hls_time 60 -hls_segment_filename %Y-%m-%d_%H-%M-%S.m4s /data/video0/now.m3u8 }}} ffmpeg version latest built on ubuntu 18.04 libavformat/hlsenc.h: {{{ if (hls->flags & HLS_PROGRAM_DATE_TIME) { time_t now0; time(&now0); vs->initial_prog_date_time = now0; } }}} time_t is integer and therefore one cannot get millisecond resolution. This causes up to 1s error. -- Ticket URL: <https://trac.ffmpeg.org/ticket/7986> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker