Andreas Rheinhardt <[email protected]> 于2020年4月30日周四 下午4:23写道： > > Tao Zhang: > > Marton Balint <[email protected]> 于2020年4月30日周四 下午3:26写道： > >> > >> > >> > >> On Thu, 30 Apr 2020, Tao Zhang wrote: > >> > >>> Marton Balint <[email protected]> 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 <[email protected]> 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 > >> > >> Then your timing based approach is not the best way to do that. What you > >> want is a buffer fullness based approach. E.g. somewhere in the chain of > >> ffmpeg components you want to have a fixed buffer size of 20 seconds of > >> data, which is always kept filled. > > I don't think bitstream filter can have a buffer which is always > > filled with 20 seconds data, because bitstream filter don't handle > > timestamp or time base. > > Feel free to point out if I have wrong understanding about bitstream filter. > > Indeed you have. Your understanding seems to be based on the old > bitstream filter API, the one before > 33d18982fa03feb061c8f744a4f0a9175c1f63ab (from November 2013). Learned it. One question I met is the actual muxer (not fifo proxy muxer) write_header function should be called after the delay, seems that I can not achieve it by the bitstream filter in a clean way. > > - Andreas > _______________________________________________ > ffmpeg-devel mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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