Sorry for my late reply... I've tested different settings and different hardware (IP to ASI converter Dektec...) equipment and I found out problem is in ffmpeg. The problem is greater if picture is moving but if am sending still picture the problem is minor. Also I found out that some STBs are sensitive to this problem other are not sensitive at all. I think it is not a problem of packet loss - hardware is connected to PC, maybe it is a problem of PCR or audio bitrate changes.
2015-01-15 21:56 GMT+01:00 Roger Pack <rogerdpa...@gmail.com>: > On 1/15/15, Janez Miklavcic <svisla...@gmail.com> wrote: > > Thank you for your help! > > > > The fact is taht when using hardware encoder and you set mux rate to > > 20Mbit/s and video to 2Mbit/s the "space" between 2 Mbit and 20 Mbit/s > will > > be filled with null packets, this is not in this case. > > Now I reduced Mux rate and it is not exceeded by the tests I did with TS > > reader. But still this encoder doesn't behave like a hardware one, but no > > problem. > > Please note, that I use this multicast stream for input into the hardware > > multiplexer. > > > > The other problem that I have with the same video settings is when I add > > audio stream. When I add audio stream there are problems on sound all the > > time. > > If I use the same settings but without video input it works without a > > problem. > > The problem is only on hardware (all that I tested), it works on VLC with > > no problem. > > > > > > Here is commandline: > > > > f:/ffmpeg/bin/ffmpeg.exe -f dshow -video_size 720x576 -framerate 2 > > -pixel_format bgr24 -i video="VidBlaster VVD" -i udp://232.8.8.11:5002 > > -acodec mp2 -ar 48000 -b:a 192k -mpegts_service_id 0x002 -vcodec > mpeg2video > > -b:v 500k -minrate:v 500k -maxrate:v 500k -bufsize:v 1024k -s: 720x576 -f > > mpegts -r 10 -g 30 -muxrate 1.5M -mpegts_pmt_start_pid 0x3E8 > > -mpegts_start_pid 0x3E9 -metadata service_name="POLANC TV INFO" -metadata > > service_provider="SVISLAR telekom d.o.o." udp:// > > 232.8.8.8:55002?pkt_size=188&buffer_size=6M > > You're sending and receiving over udp, possibly packet loss explains > your problem somehow...is there a way to tell if the packet loss is > incoming or outgoing? > > > > > > 2015-01-15 13:17 GMT+01:00 Claudiu Rad-Lohanel <jazz...@misalpina.net>: > > > >> > >> On 1/15/2015 1:30 PM, Janez Miklavcic wrote: > >> > >>> f:/ffmpeg/bin/ffmpeg.exe -f dshow -video_size 720x576 -framerate 25 > >>> -pixel_format bgr24 -i video="VidBlaster VVD" -mpegts_service_id 0x002 > >>> -metadata service_name="POLANC TV INFO" -metadata > >>> service_provider="SVISLAR > >>> telekom d.o.o." -vcodec mpeg2video -b:v 2000k -minrate:v 2000k > >>> -maxrate:v > >>> 2000k -bufsize 200000k -q 3 -s: 720x576 -r 25 -g 50 -f mpegts > >>> -mpegts_pmt_start_pid 0x3E8 -mpegts_start_pid 0x3E9 -muxrate 20M udp:// > >>> 232.8.8.8:55002?pkt_size=188 > >>> > >> > >> what's this? what would you expect it to do if you tell it to go at > >> 20Mbit? > >> > >> -muxrate 20M > >> > >> > >> > >>> Although bitrate is set to 2Mbit/s it jumps to 20 Mbit/s. > >>> > >>> Thnaks, > >>> Janez > >>> > >>> 2015-01-15 12:03 GMT+01:00 Roger Pack <rogerdpa...@gmail.com>: > >>> > >>> On 1/14/15, Janez Miklavcic <svisla...@gmail.com> wrote: > >>>> > >>>>> Dear All, > >>>>> > >>>>> I've been trying to achive constant video bitrate for mpeg-2 with > >>>>> > >>>> different > >>>> > >>>>> settings of ffmpeg (windows) but no success. > >>>>> The source was dshow. > >>>>> I've been testing video bitrate with TS reader. > >>>>> Can you tell me if video CBR in MPEG-2 is possible or not and if yes > >>>>> can > >>>>> you send me the settings. > >>>>> > >>>> uncut command line and console output of failing example please? > >>>> _______________________________________________ > >>>> ffmpeg-user mailing list > >>>> ffmpeg-user@ffmpeg.org > >>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >>>> > >>>> _______________________________________________ > >>> ffmpeg-user mailing list > >>> ffmpeg-user@ffmpeg.org > >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >>> > >> > >> -- > >> jazzman > >> > >> > >> _______________________________________________ > >> ffmpeg-user mailing list > >> ffmpeg-user@ffmpeg.org > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> > > _______________________________________________ > > ffmpeg-user mailing list > > ffmpeg-user@ffmpeg.org > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
