Dear all, I try to retransmit multicast stream . I can partially manage to do it unfortunately some interruptions in the stream appear , Please help me to correctly calculate the parameters for the udp url (fifo_size , buffer_size,bitrate, pkt_size) i want to set video bitrate to 3M and i am not sure if i have to do muxrate. Command is here :
*ffmpeg -i "udp://@238.252.250.9:5000?overrun_nonfatal=1&fifo_size=350000&pkt_size=1316&buffer_size=10000000 <http://238.252.250.9:5000?overrun_nonfatal=1&fifo_size=350000&pkt_size=1316&buffer_size=10000000>" -vf scale=720:576 -b:v 3M -maxrate 4M -bufsize 8M -b:a 128k -muxrate 5M -f mpegts "udp://@239.253.251.13:5505?overrun_nonfatal=1&fifo_size=350000&pkt_size=188&&buffer_size=2000000&bitrate=5000000 <http://239.253.251.13:5505?overrun_nonfatal=1&fifo_size=350000&pkt_size=188&&buffer_size=2000000&bitrate=5000000>"* i have doubts about most of the udp parameters so please correct me if anything looks wrong to you. *Here is the input stream:* Input #0, mpegts, from 'udp://@238.252.250.9:5000': Duration: N/A, start: 31142.994278, bitrate: N/A Program 2002 Metadata: service_name : RT Doc HD service_provider: GLOBECAST Stream #0:0[0x7e5]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc Stream #0:1[0x7e6](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s Stream #0:2[0x7e7](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 192 kb/s * If i execute the command above it crashes after 5min with :* [h264 @ 0x6b52480] reference picture missing during reorder Last message repeated 1 times [h264 @ 0x6b52480] Missing reference picture, default is 65814 Last message repeated 1 times [h264 @ 0x6ad5380] reference picture missing during reorder [h264 @ 0x6ad5380] Missing reference picture, default is 65815 Output #0, mpegts, to 'udp://@ 239.253.251.13:5505?overrun_nonfatal=1&fifo_size=350000&pkt_size=188&&buffer_size=2000000&bitrate=4000000 ': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 3000 kb/s, 25 fps, 90k tbn, 25 tbc Metadata: encoder : Lavc58.91.100 mpeg2video Side data: cpb: bitrate max/min/avg: 4000000/0/3000000 buffer size: 2000000 vbv_delay: N/A Stream #0:1(eng): Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s Metadata: encoder : Lavc58.91.100 mp2 Stream #0:2(eng): Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s Metadata: encoder : Lavc58.91.100 mp2 av_interleaved_write_frame(): Cannot allocate memory:18.08 bitrate=4995.0kbits/s speed=1.01x Last message repeated 1 times Error writing trailer of udp://@ 239.253.251.13:5505?overrun_nonfatal=1&fifo_size=350000&pkt_size=188&&buffer_size=2000000&bitrate=4000000: Cannot allocate memory frame= 9427 fps= 25 q=2.8 Lsize= 230612kB time=00:06:18.24 bitrate=4994.6kbits/s speed=1.01x video:138661kB audio:11807kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 53.263130% [udp @ 0x682e200] Circular buffer overrun. Surviving due to overrun_nonfatal option Last message repeated 121516 times Conversion failed! _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
