Dne 14.2.2017 v 09:33 Steven Liu napsal(a):
2017-02-14 16:30 GMT+08:00 Miroslav Slugeň <thunde...@email.cz>:
Dne 14.2.2017 v 04:59 Steven Liu napsal(a):
2017-02-13 21:15 GMT+08:00 Miroslav Slugeň <thunde...@email.cz>:
This patch will fix cutting hls segments into exactly same length. Because
it will intialize only on first ref_packet, which is video frame, not
audio
frame (old behavior)
Now it should be possible to create segments at exactly same length if we
use new -force_key_frames hls:time_in_seconds parameter.
This is required to support adaptive HLS.
This patch was splitted to two parts, this is first independent part
--
Miroslav Slugeň
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Patch can compile passed, but i cannot reproduce the problem before your
patch, can you send a reproduce step and test file?
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
I can provide you with sample. But this explanation should be enough:
When you use -copyts for long time audio/video sync when transcoding from
MPEGTS stream, audio comes always sooner than video (it is around 1-2 s),
so hlsenc is initialized with audio packet PTS instead of video packet PTS.
That is not correct if you wan't to have all segments with same length
-forced_keyframes to force keyframe at video position. Every other
calculations of hls_time is done only on ref_packets which is video. This
scenario is problematic when encoder is also inserting keyframes by its own
decision (libx264 default behavior).
command line please!
M.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
ffmpeg -i dvb_record.ts \
-map 0:v:0 -filter:v yadif -force_key_frames 'expr:gte(t,n_forced*10)'
-c:v libx264 -g 250 -b:v 500k \
-map 0:a:0 -ac 2 -ar 48000 -c:a libfdk_aac -b:a 128k \
-sn \
-copyts \
-r 25 \
-hls_time 10 -hls_list_size 10 -hls_allow_cache 1 -use_localtime 1
-hls_flags omit_endlist+discont_start \
-hls_segment_filename "segment-%Y%m%d-%s.ts" -f hls -y "playlist.m3u8"
But this will not work correctly until -force_key_frames is fixed for
copyts, or until you use -force_key_frames hls:10 from my patch "[PATCH]
ffmpeg: add new forced_keyframes option hls:time"
M.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
