Hi, I am pulling an RTSP stream from an Axis 4K IP camera. The stream from the camera is 30fps, but the resulting stream from ffmpeg is 29.97fps. Here is the command:
ffmpeg -rtsp_transport tcp -i rtsp://10.9.9.1:554/axis-media/media.amp -loglevel debug The rtsp log shows a framerate of 30: a=framerate:30.000000 The full log output is below. Is there a way to force the framerate to 30 fps? This video undergoes a second pass where it gets re-encoded, so we could adjust the frame rate there if necessary. But it would be preferable for it to be right at this step. Kind Regards, -Jonathan. ffmpeg version N-87616-g792b1629a8-static http://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.4.0 (Debian 6.4.0-7) 20170920 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg libavutil 55. 77.101 / 55. 77.101 libavcodec 57.106.104 / 57.106.104 libavformat 57. 82.102 / 57. 82.102 libavdevice 57. 9.101 / 57. 9.101 libavfilter 6.106.100 / 6.106.100 libswscale 4. 7.103 / 4. 7.103 libswresample 2. 8.100 / 2. 8.100 libpostproc 54. 6.100 / 54. 6.100 Splitting the commandline. Reading option '-rtsp_transport' ... matched as AVOption 'rtsp_transport' with argument 'tcp'. Reading option '-i' ... matched as input url with argument 'rtsp:// 10.9.9.1:554/axis-media/media.amp'. Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'. Finished splitting the commandline. Parsing a group of options: global . Applying option loglevel (set logging level) with argument debug. Successfully parsed a group of options. Parsing a group of options: input url rtsp:// 10.9.9.1:554/axis-media/media.amp. Successfully parsed a group of options. Opening an input file: rtsp://10.9.9.1:554/axis-media/media.amp. [tcp @ 0x40d2c00] No default whitelist set [rtsp @ 0x40d0d80] SDP: v=0 o=- 8374289283112756277 1 IN IP4 10.9.9.1 s=Session streamed with GStreamer i=rtsp-server t=0 0 a=tool:GStreamer a=type:broadcast a=range:npt=now- a=control:rtsp://10.9.9.1:554/axis-media/media.amp m=video 0 RTP/AVP 96 c=IN IP4 0.0.0.0 b=AS:240000 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1;profile-level-id=640033;sprop-parameter-sets=Z2QAM6w0yAPABD/8BbgICAoAAAfSAAHUwdDAAGP/gAAMf+Nd5caGAAMf/AAAY/8a7y4b04A=,aO48MA== a=control:rtsp://10.9.9.1:554/axis-media/media.amp/stream=0 a=framerate:30.000000 a=transform:1.000000,0.000000,0.000000;0.000000,1.000000,0.000000;0.000000,0.000000,1.000000 [rtsp @ 0x40d0d80] video codec set to: h264 [rtsp @ 0x40d0d80] RTP Packetization Mode: 1 [rtsp @ 0x40d0d80] RTP Profile IDC: 64 Profile IOP: 0 Level: 33 [rtsp @ 0x40d0d80] Extradata set to 0x40d2f80 (size: 65) [rtsp @ 0x40d0d80] setting jitter buffer size to 0 [rtsp @ 0x40d0d80] hello state=0 [h264 @ 0x40d4220] nal_unit_type: 7, nal_ref_idc: 3 [h264 @ 0x40d4220] nal_unit_type: 8, nal_ref_idc: 3 [h264 @ 0x40d4220] nal_unit_type: 7, nal_ref_idc: 3 [h264 @ 0x40d4220] nal_unit_type: 8, nal_ref_idc: 3 [h264 @ 0x40d4220] nal_unit_type: 5, nal_ref_idc: 3 [h264 @ 0x40d4220] Reinit context to 3840x2160, pix_fmt: yuvj420p [h264 @ 0x40d4220] no picture [rtsp @ 0x40d0d80] All info found [rtsp @ 0x40d0d80] rfps: 29.250000 0.019208 [rtsp @ 0x40d0d80] rfps: 29.333333 0.015021 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.416667 0.011348 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.500000 0.008189 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.583333 0.005544 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.666667 0.003414 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.750000 0.001797 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.833333 0.000695 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.916667 0.000107 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 30.000000 0.000033 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 60.000000 0.000130 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 120.000000 0.000522 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 240.000000 0.002087 Last message repeated 1 times [rtsp @ 0x40d0d80] rfps: 29.970030 0.000000 [rtsp @ 0x40d0d80] rfps: 59.940060 0.000000 Input #0, rtsp, from 'rtsp://10.9.9.1:554/axis-media/media.amp': Metadata: title : Session streamed with GStreamer comment : rtsp-server Duration: N/A, start: 0.033367, bitrate: N/A Stream #0:0, 23, 1/90000: Video: h264 (High), 1 reference frame, yuvj420p(pc, bt709, progressive, left), 3840x2160 [SAR 1:1 DAR 16:9], 0/1, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Successfully opened the file. 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