id summary reporter owner description type status priority component version resolution keywords cc blockedby blocking reproduced analyzed 1185 broken playback of rtsp streams - under windows at least kaptnole "This refers to or is the same bug as [https://ffmpeg.org/trac/ffmpeg/ticket/651] I am not able to properly decode any udp rtsp stream under windows with ffmpeg. It says ""RTP: missed n packets"" all the time and the display is corrupt. For some sources I was able to avoid the bug by switching to TCP transport (rtsp_transport=tcp) but unfortunately that is not possible on many of them. Tested various sources like a vlc-player generated stream, some internet sources and streams from several lan cameras. Verified that bug with windows versions of ffplay (downloaded from [http://ffmpeg.zeranoe.com/builds/], ffmpeg (less errors but they still exist) and my own implemantation of an ffmpeg based player compiled from the current source. 32 bit and 64 bit versions. I presume there is something wrong with the udp-rtsp protocol implementation in ffmpeg. Some problem with the ring buffer there or different buffer sizes under windows - dont know. Unfortunately I was not able to test a unix build yet. The fact that I get less errors with ffmpeg but with ffplay lets me believe that there is some connection to the frequency network read functions are called. This is the output from ffmpeg trying to decode the stream gAmeOver supplied in his bug report: I get all the same errors ""RTP: missed n packets"" (not always only 1 like in this case) with any rtsp stream I tried, also local ones. {{{ D:\Projekte\VideoTest>ffmpeg -v 9 -loglevel 99 -i rtsp://admin:dienstag14@192.16 8.0.226/VideoInput/1/h264/1 -an output.avi ffmpeg version N-39664-g6bfb304 Copyright (c) 2000-2012 the FFmpeg developers built on Apr 9 2012 20:29:24 with gcc 4.6.3 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable -libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libope njpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libth eora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable- libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --e nable-zlib libavutil 51. 46.100 / 51. 46.100 libavcodec 54. 14.101 / 54. 14.101 libavformat 54. 3.100 / 54. 3.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 67.101 / 2. 67.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 10.100 / 0. 10.100 libpostproc 52. 0.100 / 52. 0.100 [rtsp @ 02009cc0] SDP: v=0 o=- 14773669779663671777 14773669779664517885 IN IP4 192.168.0.226 s=Media Presentation c=IN IP4 0.0.0.0 b=AS:12064 t=0 0 m=video 0 RTP/AVP 100 b=AS:12000 a=framerate:25.0 a=quality:4 a=control:trackID=0 a=rtpmap:100 H264/90000 a=fmtp:100 profile-level-id=640028; Reso=1920:1080; Scanning=0; TVSystem=pal; Ca meraMode=hd; StreamID=0; BitRateMode=vbr; Gop=30; AspectRatio=16:9; packetizatio n-mode=1; sprop-parameter-sets=Z2QAKK0AzlAeAIn5cBEAAA4QAAK/IOAAAAX14QAADuayovfjA AADAC+vCAAAdzWVF78G0EQiUsA=,aP48sA==; m=data 0 RTP/AVP 111 a=rtpmap:111 octet-stream/1 a=fmtp:111 Mac=08007b88f5b8; Model=VCC-HD4600P; TargetBitRate=6000; FirmVer=0200 0300; CameraSeries=2; [rtsp @ 02009cc0] video codec set to: h264 [NULL @ 0200c7a0] RTP Profile IDC: 64 Profile IOP: 0 Level: 28 [NULL @ 0200c7a0] RTP Packetization Mode: 1 [NULL @ 0200c7a0] Extradata set to 0200cd60 (size: 68)!hello state=0 [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 0200c7a0] Missing reference picture [h264 @ 0200c7a0] decode_slice_header error [h264 @ 0200c7a0] concealing 8160 DC, 8160 AC, 8160 MV errors [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 0200c7a0] no picture [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 0200c7a0] no picture [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 0200c7a0] no picture [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 0200c7a0] no picture [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 20 times [rtsp @ 02009cc0] All info found [rtsp @ 02009cc0] Estimating duration from bitrate, this may be inaccurate Input #0, rtsp, from 'rtsp://admin:dienstag14@192.168.0.226/VideoInput/1/h264/1' : Metadata: title : Media Presentation Duration: N/A, start: 0.040000, bitrate: N/A Stream #0:0, 26, 1/90000: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DA R 16:9], 1/50, 25 fps, 25 tbr, 90k tbn, 50 tbc File 'output.avi' already exists. Overwrite ? [y/N] y w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:flags=2 [mpeg4 @ 04f8aaa0] detected 8 logical cores [mpeg4 @ 04f8aaa0] intra_quant_bias = 0 inter_quant_bias = -64 [h264 @ 0200c7a0] detected 8 logical cores Output #0, avi, to 'output.avi': Metadata: INAM : Media Presentation ISFT : Lavf54.3.100 Stream #0:0, 0, 1/25: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1920x1080 [ SAR 1:1 DAR 16:9], 1/25, q=2-31, 200 kb/s, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (h264 -> mpeg4) Press [q] to stop, [?] for help [h264 @ 04eb2040] Missing reference picture [h264 @ 04eb2040] decode_slice_header error [h264 @ 04eb2040] concealing 8160 DC, 8160 AC, 8160 MV errors [h264 @ 051feb40] no picture [h264 @ 03e98340] no picture [h264 @ 03e98920] no picture [h264 @ 03eae460] no picture [h264 @ 0200c7a0] RTP: missed 1565 packets [h264 @ 0200c7a0] RTP: missed 1566 packets [h264 @ 04f23de0] error while decoding MB 30 37, bytestream (-13) [h264 @ 04f23de0] concealing 3739 DC, 3739 AC, 3739 MV errors [h264 @ 0200c7a0] RTP: missed 1 packets [h264 @ 04eb2040] Frame num gap 14 9 [h264 @ 04eb2040] Frame num gap 14 10 [h264 @ 04eb2040] Frame num gap 14 11 [h264 @ 04eb2040] Frame num gap 14 12 [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 8 times frame= 13 fps=0.0 q=16.3 size= 156kB time=00:00:00.96 bitrate=1330.0kbits/ RTP: missed 1 packets [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 11 times frame= 26 fps= 25 q=31.0 size= 233kB time=00:00:04.40 bitrate= 433.7kbits/ RTP: missed 1 packets [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 11 times frame= 39 fps= 25 q=24.8 size= 353kB time=00:00:04.92 bitrate= 588.4kbits/ RTP: missed 1 packets [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 11 times frame= 52 fps= 25 q=31.0 size= 411kB time=00:00:05.44 bitrate= 618.2kbits/ RTP: missed 1 packets [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 11 times frame= 65 fps= 25 q=31.0 size= 460kB time=00:00:05.96 bitrate= 632.6kbits/ RTP: missed 1 packets [h264 @ 0200c7a0] RTP: missed 1 packets Last message repeated 9 times RTP: missed 1 packets frame= 89 fps= 28 q=31.0 Lsize= 559kB time=00:00:06.92 bitrate= 661.4kbits /s video:549kB audio:0kB global headers:0kB muxing overhead 1.775516% Received signal 2: terminating. }}} " defect new normal avformat git-master rtsp udp 0 0