Marton Balint <c...@passwd.hu> 于2020年4月30日周四 上午4:55写道： > > > > On Thu, 30 Apr 2020, Tao Zhang wrote: > > > Marton Balint <c...@passwd.hu> 于2020年4月30日周四 上午12:03写道： > >> > >> > >> > >> On Wed, 29 Apr 2020, leozhang wrote: > >> > >> > In some applications, it is required to add delay to live streaming. > >> > >> In what applications? And if you do this, why not run > >> > >> sleep 20; ffmpeg .... > > In live streaming applications, someone wouldn't want broadcast what's > > comming next immediately. > > Sleep 20 then ffmpeg is not ok, because the stream is still > > broadcasting immediately, and lost 20 seconds signal. > > So you want to buffer 20 seconds of input, and then start the output? yes > > >> > >> I don't see how this is useful at all. > >> > >> And what is -paced? What it is used for? Isn't it the same as using ffmpeg > >> -re? You really should better explain your use case. > > -re read the input, -paced write the output. > > But why do you want to delay every output packet? By default, ffmpeg will output packets as fast as possible. So I delay output every packet at native frame rate to simulate live stream. > > >> > >> Regards, > >> Marton > >> > >> > For example, you can add 20 seconds to rtmp stream with below command: > >> > ffmpeg -i your_input_stream_address -c copy -map 0:a -map 0:v -f fifo > >> > -paced 1 -queue_size 6000000 > >> > -output_delay 20000000 -fifo_format flv > >> > rtmp://example.com/live/delayed_stream_name > >> > > >> > leozhang (3): > >> > avformat/fifo: add option to delay output > >> > avformat/fifo: add option to write packets in paced way > >> > doc/muxers: add command example how to delay output live stream > >> > > >> > doc/muxers.texi | 17 +++++++++++++++++ > >> > libavformat/fifo.c | 26 ++++++++++++++++++++++++++ > >> > 2 files changed, 43 insertions(+) > >> > > >> > -- > >> > 1.8.3.1 > >> > > >> > _______________________________________________ > >> > ffmpeg-devel mailing list > >> > ffmpeg-devel@ffmpeg.org > >> > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >> > > >> > To unsubscribe, visit link above, or email > >> > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > >> _______________________________________________ > >> ffmpeg-devel mailing list > >> ffmpeg-devel@ffmpeg.org > >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >> > >> To unsubscribe, visit link above, or email > >> ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > > _______________________________________________ > > ffmpeg-devel mailing list > > ffmpeg-devel@ffmpeg.org > > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > > > To unsubscribe, visit link above, or email > > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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