Hi all, got this error when converting an rtsp stream from an IP camera to rtmp, it appears after 1 or 2 mns, you can notice that speed is increased from speed=0.972x to speed=14.2x. Using nginx as rtmp server. Here are the ouputs below. Thank you for you help. #ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i rtsp://xxx:xxx@yyy.camera.com:7070 -tune zerolatency -vcodec libx264 -pix_fmt + -c:v libx264 -c:a aac -strict experimental -f flv rtmp://localhost/myapp/mystream ffmpeg version N-85600-g9ef21a8 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 4.9.2 (Debian 4.9.2-10) configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-gpl --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree libavutil 55. 61.100 / 55. 61.100 libavcodec 57. 93.100 / 57. 93.100 libavformat 57. 72.101 / 57. 72.101 libavdevice 57. 7.100 / 57. 7.100 libavfilter 6. 85.100 / 6. 85.100 libswscale 4. 7.101 / 4. 7.101 libswresample 2. 8.100 / 2. 8.100 libpostproc 54. 6.100 / 54. 6.100 Input #0, lavfi, from 'anullsrc': Duration: N/A, start: 0.000000, bitrate: 705 kb/s Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s Input #1, rtsp, from 'rtsp://admin:papenoo2013@motu.camera.pf:7070': Metadata: title : Session streamed by RTP/RTSP server comment : ACTi.COM Streaming Media v Duration: N/A, start: 1.397744, bitrate: N/A Stream #1:0: Video: h264 (Baseline), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], 4.25 fps, 4.29 tbr, 90k tbn, 8.57 tbc [tcp @ 0x248ada0] Connection to tcp://localhost:1935 failed (Connection refused), trying next address Stream mapping: Stream #1:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native)) Press [q] to stop, [?] for help [rtsp @ 0x239bcc0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8) No pixel format specified, yuvj420p for H.264 encoding chosen. Use -pix_fmt yuv420p for compatibility with outdated media players. [libx264 @ 0x23b93e0] using SAR=1/1 [libx264 @ 0x23b93e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2 [libx264 @ 0x23b93e0] profile High, level 3.1 [libx264 @ 0x23b93e0] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=250 keyint_min=4 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, flv, to 'rtmp://localhost/myapp/mystream': Metadata: encoder : Lavf57.72.101 Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuvj420p(pc, progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 4.29 fps, 1k tbn, 4.29 tbc Metadata: encoder : Lavc57.93.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc57.93.100 aac Past duration 0.998894 too large Last message repeated 2 times Past duration 0.998894 too large 108kB time=00:00:00.70 bitrate=1268.1kbits/s dup=0 drop=5 speed=1.38x Last message repeated 5 times Past duration 0.998894 too large 252kB time=00:00:02.09 bitrate= 985.3kbits/s dup=0 drop=5 speed= 2x Last message repeated 5 times Past duration 0.998894 too large 378kB time=00:00:03.49 bitrate= 885.6kbits/s dup=0 drop=5 speed= 2.1x Last message repeated 7 times Past duration 0.998894 too large 538kB time=00:00:05.36 bitrate= 822.8kbits/s dup=0 drop=5 speed=2.35x Last message repeated 6 times Past duration 0.998894 too large 692kB time=00:00:06.99 bitrate= 810.8kbits/s dup=0 drop=5 speed=2.47x Last message repeated 3 times Past duration 0.998894 too large 804kB time=00:00:07.96 bitrate= 827.2kbits/s dup=0 drop=5 speed=2.39x Last message repeated 2 times Past duration 0.998894 too large 867kB time=00:00:08.62 bitrate= 823.5kbits/s dup=0 drop=5 speed= 2.2x Last message repeated 1 times Past duration 0.998894 too large 902kB time=00:00:09.08 bitrate= 812.9kbits/s dup=0 drop=5 speed=2.02x Last message repeated 2 times Past duration 0.998894 too large 1046kB time=00:00:09.78 bitrate= 875.7kbits/s dup=0 drop=5 speed=1.89x Last message repeated 1 times Past duration 0.998894 too large 1124kB time=00:00:10.25 bitrate= 898.0kbits/s dup=0 drop=5 speed=1.72x Last message repeated 1 times Past duration 0.998894 too large 1183kB time=00:00:10.71 bitrate= 904.5kbits/s dup=0 drop=5 speed=1.61x Last message repeated 1 times Past duration 0.998894 too large 1252kB time=00:00:11.18 bitrate= 916.7kbits/s dup=0 drop=5 speed=1.57x Last message repeated 2 times Past duration 0.998894 too large 1292kB time=00:00:11.88 bitrate= 890.8kbits/s dup=0 drop=5 speed=1.53x Last message repeated 3 times Past duration 0.998894 too large 1374kB time=00:00:12.81 bitrate= 878.4kbits/s dup=0 drop=5 speed=1.52x Last message repeated 2 times Past duration 0.998894 too large 1455kB time=00:00:13.53 bitrate= 880.5kbits/s dup=0 drop=5 speed=1.51x Last message repeated 2 times Past duration 0.998894 too large 1506kB time=00:00:14.21 bitrate= 867.9kbits/s dup=0 drop=5 speed=1.49x Last message repeated 1 times Past duration 0.998894 too large 1535kB time=00:00:14.68 bitrate= 856.7kbits/s dup=0 drop=5 speed=1.44x Last message repeated 2 times Past duration 0.998894 too large 1614kB time=00:00:15.41 bitrate= 857.7kbits/s dup=0 drop=5 speed=1.45x Last message repeated 1 times Past duration 0.998894 too large 1665kB time=00:00:15.88 bitrate= 858.6kbits/s dup=0 drop=5 speed=1.42x Last message repeated 1 times Past duration 0.998894 too large 1694kB time=00:00:16.34 bitrate= 848.8kbits/s dup=0 drop=5 speed= 1.4x Last message repeated 1 times Past duration 0.998894 too large 1743kB time=00:00:16.81 bitrate= 849.5kbits/s dup=0 drop=5 speed=1.38x Last message repeated 1 times Past duration 0.998894 too large 1772kB time=00:00:17.27 bitrate= 840.4kbits/s dup=0 drop=5 speed=1.31x Past duration 0.998894 too large 1772kB time=00:00:17.47 bitrate= 830.8kbits/s dup=0 drop=5 speed=1.27x Last message repeated 2 times Past duration 0.998894 too large 1852kB time=00:00:18.20 bitrate= 833.2kbits/s dup=0 drop=5 speed=1.28x Past duration 0.998894 too large 1852kB time=00:00:18.40 bitrate= 824.1kbits/s dup=0 drop=5 speed=1.24x Last message repeated 3 times Past duration 0.998894 too large 1932kB time=00:00:19.34 bitrate= 818.2kbits/s dup=0 drop=5 speed=1.26x Last message repeated 1 times Past duration 0.998894 too large 1983kB time=00:00:19.80 bitrate= 820.1kbits/s dup=0 drop=5 speed=1.24x Last message repeated 2 times Past duration 0.998894 too large 2077kB time=00:00:20.54 bitrate= 827.8kbits/s dup=0 drop=5 speed=1.21x Past duration 0.998894 too large 2077kB time=00:00:20.73 bitrate= 820.3kbits/s dup=0 drop=5 speed=1.18x Last message repeated 1 times Past duration 0.998894 too large 2128kB time=00:00:21.20 bitrate= 822.1kbits/s dup=0 drop=5 speed=1.16x Last message repeated 2 times Past duration 0.998894 too large 2220kB time=00:00:21.94 bitrate= 828.7kbits/s dup=0 drop=5 speed=1.17x Last message repeated 3 times Past duration 0.998894 too large 2310kB time=00:00:22.87 bitrate= 827.5kbits/s dup=0 drop=5 speed=1.19x Last message repeated 2 times Past duration 0.998894 too large 2383kB time=00:00:23.56 bitrate= 828.3kbits/s dup=0 drop=5 speed=1.19x Past duration 0.998894 too large 2400kB time=00:00:23.80 bitrate= 826.1kbits/s dup=0 drop=5 speed=1.17x Last message repeated 1 times Past duration 0.998894 too large 2440kB time=00:00:24.23 bitrate= 824.9kbits/s dup=0 drop=5 speed=1.17x Last message repeated 1 times Past duration 0.998894 too large 2492kB time=00:00:24.72 bitrate= 825.6kbits/s dup=0 drop=5 speed=1.16x Past duration 0.998894 too large 2492kB time=00:00:24.93 bitrate= 818.8kbits/s dup=0 drop=5 speed=1.14x Last message repeated 2 times Past duration 0.998894 too large 2582kB time=00:00:25.65 bitrate= 824.4kbits/s dup=0 drop=5 speed=1.15x Last message repeated 2 times Past duration 0.998894 too large 2635kB time=00:00:26.33 bitrate= 819.8kbits/s dup=0 drop=5 speed=1.15x Last message repeated 1 times Past duration 0.998894 too large 2672kB time=00:00:26.79 bitrate= 816.9kbits/s dup=0 drop=5 speed=1.15x Last message repeated 3 times Past duration 0.998894 too large 2763kB time=00:00:27.72 bitrate= 816.4kbits/s dup=0 drop=5 speed=1.16x Last message repeated 3 times Past duration 0.998894 too large 2894kB time=00:00:28.70 bitrate= 826.1kbits/s dup=0 drop=5 speed=1.17x Past duration 0.998894 too large 2908kB time=00:00:28.93 bitrate= 823.4kbits/s dup=0 drop=5 speed=1.16x Last message repeated 2 times Past duration 0.998894 too large 2945kB time=00:00:29.59 bitrate= 815.2kbits/s dup=0 drop=5 speed=1.16x Last message repeated 4 times Past duration 0.998894 too large 3051kB time=00:00:30.75 bitrate= 812.7kbits/s dup=0 drop=5 speed=1.18x Last message repeated 1 times Past duration 0.998894 too large 3132kB time=00:00:31.22 bitrate= 821.6kbits/s dup=0 drop=5 speed=1.17x Last message repeated 1 times Past duration 0.998894 too large 3204kB time=00:00:31.68 bitrate= 828.4kbits/s dup=0 drop=5 speed=1.16x Last message repeated 1 times Past duration 0.998894 too large 3257kB time=00:00:32.18 bitrate= 829.1kbits/s dup=0 drop=5 speed=1.16x Last message repeated 2 times Past duration 0.998894 too large 3321kB time=00:00:32.88 bitrate= 827.4kbits/s dup=0 drop=5 speed=1.16x Last message repeated 1 times Past duration 0.998894 too large 3336kB time=00:00:33.32 bitrate= 820.3kbits/s dup=0 drop=5 speed=1.15x Last message repeated 2 times Past duration 0.998894 too large 3415kB time=00:00:34.06 bitrate= 821.3kbits/s dup=0 drop=5 speed=1.16x Last message repeated 1 times Past duration 0.998894 too large 10645kB time=00:01:45.55 bitrate= 826.2kbits/s dup=0 drop=5 speed= 0.9x Past duration 0.998894 too large 10681kB time=00:01:45.81 bitrate= 826.9kbits/s dup=0 drop=5 speed=0.898x Last message repeated 1 times [h264 @ 0x23bb480] negative number of zero coeffs at 25 267 bitrate= 827.3kbits/s dup=0 drop=5 speed=0.876x [h264 @ 0x23bb480] error while decoding MB 25 26 [h264 @ 0x23bb480] concealing 1544 DC, 1544 AC, 1544 MV errors in P frame Past duration 0.998894 too large fame= 458 fps=2.9 q=17.0 size= 12605kB time=00:33:47.26 bitrate= 50.9kbits/s dup=0 drop=5 speed= 14.2x frame= 458 fps=2.9 q=17.0 size= 12633kB time=00:34:16.15 bitrate= 50.3kbits/s dup=0 drop=5 spee^Came= 458 fps=2.8 q=17.0 size= 13024kB time=00:40:58.94 bitrate= 43.4kbits/s dup=0 drop=5 speed= 15x frame= 458 fps=2.8 q=17.0 size= 13077kB time=00:41:53.74 bitrate= 42.6kbits/s dup=0 drop=5 spee^Came= 458 fps=2.7 q=17.0 size= 13185kB time=00:43:45.06 bitrate= 41.1kbits/s dup=0 drop=5 speed=15.7x frame= 458 fps=2.7 q=17.0 size= 13212kB time=00:44:12.85 bitrate= 40.8kbits/s dup=0 drop=5 speeframe= 458 fps=2.7 q=17.0 size= 13265kB time=00:45:07.88 bitrate= 40.1kbits/s dup=0 drop=5 speed=16.1x frame= 458 fps=2.6 q=17.0 size= 13615kB time=00:51:08.05 bitrate= 36.4kbits/s dup=0 drop=5 speeframe= 458 fps=2.6 q=17.0 size= 13664kB time=00:51:59.04 bitrate= 35.9kbits/s dup=0 drop=5 speed=17.7x