Hi Pavel, I can confirm that there is a problem with the UDP packet engine in FFmpeg. FFmpeg has excessive jitter in it's UDP streaming output to the point where hardware decoders can't handle it. My solution was to buffer to disk and have my own program read and send the datagrams via a very tight event loop. While increasing the PCR period is not a bad thing, FFmpeg really should stream at a more consistant rate. Can someone explain the theory behind how the UDP rate control is currently implemented in FFmpeg? PCR sounds like a good way to tell when to send a packet, except not every packet contains one. If FFmpeg uses PCR to tell how long to wait to send a packet, then do the packets in between go at line speed? I plan on taking a look at the code that does this, but I would really appreciate it if someone who knows the code could explain the theory as I usually deal with a slightly different dev setup.
Zach On Mon, Nov 16, 2015 at 2:55 AM, Pavel Meshkov <pmesh...@kwikflixtv.com> wrote: > Good day. > We still need this feature. Can someone implement above functionality on > bounty base (up to $2000)? > > 12.11.2015 12:28, Pavel Meshkov пишет: > > Thanks for explanation. >> We will try to rewrite it with new knowledge. >> >> I need your suggestion. >> We are try to send constant udp stream from rtmp live stream with only >> repack it. >> >> I found "mpegts_write_packet_internal" function >> https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/mpegtsenc.c#L1402 >> is it right place to make changes? >> >> >> >> 2015-11-12 1:47 GMT+03:00 Kieran Kunhya <kier...@obe.tv>: >> >> On 11 November 2015 at 22:41, Kieran Kunhya <kier...@obe.tv> wrote: >>> >>>> On 11 Nov 2015 7:08 p.m., "Pavel Meshkov" <pmesh...@kwikflixtv.com> >>>> >>> wrote: >>> >>>> Trying to reattach patch >>>>> >>>>> 11.11.2015 22:01, Pavel Meshkov пишет: >>>>> >>>>>> We added UDP output constant bitrate functionality. >>>>>> Please review patch. >>>>>> >>>>>> P.S.: It's first patch we send. Please notify me if something made >>>>>> >>>>> wrong. >>> >>>> This an awful hack. >>>> Kieran >>>> >>> I have been asked to explain why this is bad. >>> You want to use FFmpeg to stream an mpegts - the only correct way to >>> do this is to index the ts like "multicat" does and then use the PCR >>> to schedule the output timing. >>> >>> Kieran >>> _______________________________________________ >>> 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-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
