Recherche avancée

Sur d’autres sites (6075)

• ffmpeg droping framerate on capture device

  8 avril 2022, par Rudi

  i have a hdmi capture device which seems to drop frames every now and then :

  


  ffmpeg version 4.1.8-0+enter code heredeb10u1+rpt1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8 (Raspbian 8.3.0-6+rpi1)
  configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --libdir=/usr/lib/arm-linux-gnueabihf --cpu=arm1176jzf-s --arch=arm
  WARNING: library configuration mismatch
  avutil      configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  avcodec     configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  avformat    configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  avdevice    configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  avfilter    configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  avresample  configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  swscale     configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  swresample  configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  postproc    configuration: --prefix=/usr --extra-version=0+deb10u1+rpt1 --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-vout-drm --enable-v4l2-request --enable-libudev --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
[mjpeg @ 0x1067210] Found EOI before any SOF, ignoring
[mjpeg @ 0x1067210] No JPEG data found in image
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 6996.350004, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, 60 fps, 60 tbr, 1000k tbn, 1000k tbc
Output #0, mp4, to 'testfjfjfjf.mp4':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: mjpeg (mp4v / 0x7634706D), yuvj422p(pc, bt470bg/unknown/unknown), 1920x1080, q=2-31, 60 fps, 60 tbr, 15360 tbn, 30 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=   32 fps=0.0 q=-1.0 size=    3328kB time=00:00:00.51 bitrate=52814.3kbits/s speed=1.03x    
frame=   62 fps= 62 q=-1.0 size=    6400kB time=00:00:01.01 bitrate=51795.2kbits/s speed=1.01x    
frame=   93 fps= 61 q=-1.0 size=    9472kB time=00:00:01.53 bitrate=50639.8kbits/s speed=1.01x    
frame=  123 fps= 61 q=-1.0 size=   12800kB time=00:00:02.03 bitrate=51592.6kbits/s speed=1.01x    
frame=  153 fps= 61 q=-1.0 size=   15872kB time=00:00:02.53 bitrate=51342.3kbits/s speed=   1x    
frame=  184 fps= 61 q=-1.0 size=   18944kB time=00:00:03.04 bitrate=50905.7kbits/s speed=1.01x    
frame=  214 fps= 61 q=-1.0 size=   22784kB time=00:00:03.54 bitrate=52596.8kbits/s speed=   1x    
frame=  244 fps= 60 q=-1.0 size=   26880kB time=00:00:04.04 bitrate=54388.2kbits/s speed=   1x    
frame=  274 fps= 60 q=-1.0 size=   30720kB time=00:00:04.54 bitrate=55325.4kbits/s speed=   1x    
frame=  305 fps= 60 q=-1.0 size=   34816kB time=00:00:05.06 bitrate=56312.3kbits/s speed=   1x    
frame=  335 fps= 60 q=-1.0 size=   38656kB time=00:00:05.56 bitrate=56904.2kbits/s speed=   1x    
frame=  365 fps= 60 q=-1.0 size=   42496kB time=00:00:06.06 bitrate=57399.7kbits/s speed=   1x    
frame=  396 fps= 60 q=-1.0 size=   46848kB time=00:00:06.58 bitrate=58315.8kbits/s speed=   1x    
frame=  426 fps= 60 q=-1.0 size=   50944kB time=00:00:07.08 bitrate=58936.1kbits/s speed=   1x    
frame=  457 fps= 60 q=-1.0 size=   55296kB time=00:00:07.59 bitrate=59625.3kbits/s speed=   1x    
frame=  487 fps= 60 q=-1.0 size=   59904kB time=00:00:08.09 bitrate=60604.9kbits/s speed=   1x    
frame=  517 fps= 60 q=-1.0 size=   64768kB time=00:00:08.59 bitrate=61714.5kbits/s speed=   1x    
frame=  547 fps= 60 q=-1.0 size=   69376kB time=00:00:09.09 bitrate=62471.6kbits/s speed=   1x    
frame=  578 fps= 60 q=-1.0 size=   73984kB time=00:00:09.61 bitrate=63044.5kbits/s speed=   1x    
frame=  608 fps= 60 q=-1.0 size=   78848kB time=00:00:10.11 bitrate=63867.2kbits/s speed=   1x    
frame=  638 fps= 60 q=-1.0 size=   83456kB time=00:00:10.61 bitrate=64414.7kbits/s speed=   1x    
frame=  668 fps= 60 q=-1.0 size=   88064kB time=00:00:11.11 bitrate=64912.5kbits/s speed=   1x    
frame=  698 fps= 60 q=-1.0 size=   92672kB time=00:00:11.61 bitrate=65368.2kbits/s speed=   1x    
frame=  729 fps= 60 q=-1.0 size=   97280kB time=00:00:12.12 bitrate=65699.1kbits/s speed=   1x    
frame=  759 fps= 60 q=-1.0 size=  101888kB time=00:00:12.62 bitrate=66087.0kbits/s speed=   1x    
frame=  789 fps= 60 q=-1.0 size=  105984kB time=00:00:13.12 bitrate=66125.3kbits/s speed=   1x    
frame=  819 fps= 60 q=-1.0 size=  109312kB time=00:00:13.63 bitrate=65699.4kbits/s speed=   1x    
frame=  849 fps= 60 q=-1.0 size=  112640kB time=00:00:14.13 bitrate=65303.8kbits/s speed=   1x    
frame=  880 fps= 60 q=-1.0 size=  115968kB time=00:00:14.64 bitrate=64864.1kbits/s speed=   1x    
frame=  910 fps= 60 q=-1.0 size=  119296kB time=00:00:15.14 bitrate=64522.6kbits/s speed=   1x    
frame=  940 fps= 60 q=-1.0 size=  122624kB time=00:00:15.64 bitrate=64202.6kbits/s speed=   1x    
frame=  971 fps= 60 q=-1.0 size=  125952kB time=00:00:16.16 bitrate=63823.7kbits/s speed=   1x    
frame= 1001 fps= 60 q=-1.0 size=  130048kB time=00:00:16.66 bitrate=63922.0kbits/s speed=   1x    
frame= 1031 fps= 60 q=-1.0 size=  134144kB time=00:00:17.16 bitrate=64029.6kbits/s speed=   1x    
frame= 1061 fps= 60 q=-1.0 size=  138496kB time=00:00:17.66 bitrate=64235.0kbits/s speed=   1x    
frame= 1092 fps= 60 q=-1.0 size=  143104kB time=00:00:18.18 bitrate=64473.9kbits/s speed=   1x    
frame= 1122 fps= 60 q=-1.0 size=  147200kB time=00:00:18.68 bitrate=64544.2kbits/s speed=   1x    
frame= 1153 fps= 60 q=-1.0 size=  151808kB time=00:00:19.19 bitrate=64775.4kbits/s speed=   1x    
frame= 1183 fps= 60 q=-1.0 size=  155904kB time=00:00:19.69 bitrate=64834.4kbits/s speed=   1x    
frame= 1213 fps= 60 q=-1.0 size=  160256kB time=00:00:20.19 bitrate=64994.3kbits/s speed=   1x    
frame= 1243 fps= 60 q=-1.0 size=  164352kB time=00:00:20.69 bitrate=65045.2kbits/s speed=   1x    
frame= 1274 fps= 60 q=-1.0 size=  168704kB time=00:00:21.21 bitrate=65143.4kbits/s speed=   1x    
frame= 1304 fps= 60 q=-1.0 size=  172800kB time=00:00:21.71 bitrate=65188.4kbits/s speed=   1x    
frame= 1334 fps= 60 q=-1.0 size=  176896kB time=00:00:22.21 bitrate=65231.5kbits/s speed=   1x    
frame= 1364 fps= 60 q=-1.0 size=  180992kB time=00:00:22.71 bitrate=65272.6kbits/s speed=   1x    
frame= 1395 fps= 60 q=-1.0 size=  185088kB time=00:00:23.23 bitrate=65267.1kbits/s speed=   1x    
frame= 1425 fps= 60 q=-1.0 size=  189184kB time=00:00:23.73 bitrate=65305.6kbits/s speed=   1x    
frame= 1455 fps= 60 q=-1.0 size=  193024kB time=00:00:24.23 bitrate=65256.1kbits/s speed=   1x    
frame= 1486 fps= 60 q=-1.0 size=  197120kB time=00:00:24.74 bitrate=65251.1kbits/s speed=   1x    
frame= 1514 fps= 59 q=-1.0 size=  200704kB time=00:00:25.21 bitrate=65204.3kbits/s speed=0.985x    
frame= 1568 fps= 60 q=-1.0 size=  207616kB time=00:00:26.11 bitrate=65125.1kbits/s speed=   1x    
frame= 1598 fps= 60 q=-1.0 size=  211456kB time=00:00:26.61 bitrate=65083.4kbits/s speed=   1x    
frame= 1628 fps= 60 q=-1.0 size=  215296kB time=00:00:27.11 bitrate=65043.2kbits/s speed=   1x    
frame= 1658 fps= 60 q=-1.0 size=  219136kB time=00:00:27.61 bitrate=65004.5kbits/s speed=   1x    
frame= 1688 fps= 60 q=-1.0 size=  222976kB time=00:00:28.11 bitrate=64967.1kbits/s speed=   1x    
frame= 1718 fps= 60 q=-1.0 size=  226816kB time=00:00:28.61 bitrate=64931.1kbits/s speed=   1x    
frame= 1749 fps= 60 q=-1.0 size=  230912kB time=00:00:29.13 bitrate=64932.8kbits/s speed=   1x    
frame= 1779 fps= 60 q=-1.0 size=  234752kB time=00:00:29.63 bitrate=64898.7kbits/s speed=   1x    
frame= 1809 fps= 60 q=-1.0 size=  237056kB time=00:00:30.13 bitrate=64447.9kbits/s speed=   1x    
frame= 1839 fps= 60 q=-1.0 size=  239360kB time=00:00:30.63 bitrate=64011.8kbits/s speed=   1x    
frame= 1869 fps= 60 q=-1.0 size=  241664kB time=00:00:31.13 bitrate=63590.0kbits/s speed=   1x    
frame= 1900 fps= 60 q=-1.0 size=  243968kB time=00:00:31.64 bitrate=63149.5kbits/s speed=   1x    
frame= 1930 fps= 60 q=-1.0 size=  246272kB time=00:00:32.14 bitrate=62754.2kbits/s speed=   1x    
frame= 1961 fps= 60 q=-1.0 size=  248832kB time=00:00:32.66 bitrate=62404.8kbits/s speed=   1x    
frame= 1991 fps= 60 q=-1.0 size=  251136kB time=00:00:33.16 bitrate=62033.0kbits/s speed=   1x    
frame= 2021 fps= 60 q=-1.0 size=  253440kB time=00:00:33.66 bitrate=61672.2kbits/s speed=   1x    
frame= 2051 fps= 60 q=-1.0 size=  255744kB time=00:00:34.16 bitrate=61322.0kbits/s speed=   1x    
frame= 2082 fps= 60 q=-1.0 size=  258816kB time=00:00:34.68 bitrate=61135.1kbits/s speed=   1x    
frame= 2112 fps= 60 q=-1.0 size=  261376kB time=00:00:35.18 bitrate=60862.1kbits/s speed=   1x    
frame= 2142 fps= 60 q=-1.0 size=  263680kB time=00:00:35.68 bitrate=60538.2kbits/s speed=   1x    
frame= 2172 fps= 60 q=-1.0 size=  266240kB time=00:00:36.18 bitrate=60281.1kbits/s speed=   1x    
frame= 2203 fps= 60 q=-1.0 size=  269056kB time=00:00:36.69 bitrate=60062.0kbits/s speed=   1x    
frame= 2233 fps= 60 q=-1.0 size=  272896kB time=00:00:37.19 bitrate=60100.2kbits/s speed=   1x    
frame= 2263 fps= 60 q=-1.0 size=  276480kB time=00:00:37.69 bitrate=60081.8kbits/s speed=   1x    
frame= 2293 fps= 60 q=-1.0 size=  280064kB time=00:00:38.19 bitrate=60063.9kbits/s speed=   1x    
frame= 2323 fps= 60 q=-1.0 size=  283648kB time=00:00:38.69 bitrate=60046.4kbits/s speed=   1x    
frame= 2354 fps= 60 q=-1.0 size=  287488kB time=00:00:39.21 bitrate=60058.4kbits/s speed=   1x    
frame= 2384 fps= 60 q=-1.0 size=  290816kB time=00:00:39.71 bitrate=59988.6kbits/s speed=   1x    
frame= 2414 fps= 60 q=-1.0 size=  293376kB time=00:00:40.21 bitrate=59764.2kbits/s speed=   1x    
frame= 2444 fps= 60 q=-1.0 size=  296192kB time=00:00:40.71 bitrate=59596.7kbits/s speed=   1x    
frame= 2475 fps= 60 q=-1.0 size=  299008kB time=00:00:41.22 bitrate=59410.2kbits/s speed=   1x    
frame= 2505 fps= 60 q=-1.0 size=  301312kB time=00:00:41.72 bitrate=59150.6kbits/s speed=   1x    
frame= 2535 fps= 60 q=-1.0 size=  304128kB time=00:00:42.22 bitrate=58996.4kbits/s speed=   1x    
frame= 2565 fps= 60 q=-1.0 size=  306688kB time=00:00:42.73 bitrate=58796.7kbits/s speed=   1x    
frame= 2596 fps= 60 q=-1.0 size=  309504kB time=00:00:43.25 bitrate=58623.1kbits/s speed=   1x    
frame= 2626 fps= 60 q=-1.0 size=  312576kB time=00:00:43.75 bitrate=58528.3kbits/s speed=   1x    
frame= 2656 fps= 60 q=-1.0 size=  315648kB time=00:00:44.24 bitrate=58440.8kbits/s speed=   1x    
frame= 2686 fps= 60 q=-1.0 size=  318720kB time=00:00:44.74 bitrate=58350.0kbits/s speed=   1x    
frame= 2717 fps= 60 q=-1.0 size=  321792kB time=00:00:45.26 bitrate=58235.7kbits/s speed=   1x    
frame= 2747 fps= 60 q=-1.0 size=  324864kB time=00:00:45.76 bitrate=58149.3kbits/s speed=   1x    
frame= 2777 fps= 60 q=-1.0 size=  327936kB time=00:00:46.26 bitrate=58064.8kbits/s speed=   1x    
frame= 2808 fps= 60 q=-1.0 size=  331008kB time=00:00:46.78 bitrate=57962.1kbits/s speed=   1x    
frame= 2838 fps= 60 q=-1.0 size=  333824kB time=00:00:47.28 bitrate=57837.0kbits/s speed=   1x    
frame= 2868 fps= 60 q=-1.0 size=  336640kB time=00:00:47.78 bitrate=57714.5kbits/s speed=   1x    
frame= 2875 fps= 59 q=-1.0 size=  337408kB time=00:00:47.89 bitrate=57706.0kbits/s speed=0.989x    
frame= 2935 fps= 60 q=-1.0 size=  343296kB time=00:00:48.96 bitrate=57432.3kbits/s speed=   1x    
frame= 2965 fps= 60 q=-1.0 size=  346112kB time=00:00:49.46 bitrate=57318.0kbits/s speed=   1x    
frame= 2968 fps= 59 q=-1.0 size=  346368kB time=00:00:49.51 bitrate=57304.8kbits/s speed=0.984x    
frame= 3027 fps= 60 q=-1.0 size=  351488kB time=00:00:50.83 bitrate=56646.1kbits/s speed=   1x    
frame= 3058 fps= 60 q=-1.0 size=  354560kB time=00:00:51.34 bitrate=56566.9kbits/s speed=   1x    
frame= 3088 fps= 60 q=-1.0 size=  357632kB time=00:00:51.84 bitrate=56506.8kbits/s speed=   1x    
frame= 3118 fps= 60 q=-1.0 size=  360704kB time=00:00:52.34 bitrate=56447.7kbits/s speed=   1x    
frame= 3149 fps= 60 q=-1.0 size=  363520kB time=00:00:52.86 bitrate=56333.0kbits/s speed=   1x    
frame= 3179 fps= 60 q=-1.0 size=  366592kB time=00:00:53.36 bitrate=56276.7kbits/s speed=   1x    
frame= 3209 fps= 60 q=-1.0 size=  369664kB time=00:00:53.86 bitrate=56221.4kbits/s speed=   1x    
frame= 3239 fps= 60 q=-1.0 size=  372480kB time=00:00:54.36 bitrate=56128.6kbits/s speed=   1x    
frame= 3270 fps= 60 q=-1.0 size=  374784kB time=00:00:54.87 bitrate=55944.7kbits/s speed=   1x    
frame= 3300 fps= 60 q=-1.0 size=  377088kB time=00:00:55.37 bitrate=55780.3kbits/s speed=   1x    
frame= 3331 fps= 60 q=-1.0 size=  379392kB time=00:00:55.89 bitrate=55599.0kbits/s speed=   1x    
frame= 3361 fps= 60 q=-1.0 size=  381696kB time=00:00:56.39 bitrate=55440.7kbits/s speed=   1x    
frame= 3392 fps= 60 q=-1.0 size=  384256kB time=00:00:56.91 bitrate=55306.6kbits/s speed=   1x    
frame= 3422 fps= 60 q=-1.0 size=  386560kB time=00:00:57.41 bitrate=55153.6kbits/s speed=   1x    
frame= 3452 fps= 60 q=-1.0 size=  388864kB time=00:00:57.91 bitrate=55003.2kbits/s speed=   1x    
frame= 3482 fps= 60 q=-1.0 size=  391168kB time=00:00:58.41 bitrate=54855.5kbits/s speed=   1x    
frame= 3512 fps= 60 q=-1.0 size=  393472kB time=00:00:58.91 bitrate=54710.2kbits/s speed=   1x    
frame= 3543 fps= 60 q=-1.0 size=  395776kB time=00:00:59.43 bitrate=54552.7kbits/s speed=   1x    
frame= 3556 fps= 59 q=-1.0 size=  396800kB time=00:00:59.64 bitrate=54495.9kbits/s speed=0.991x    
frame= 3616 fps= 60 q=-1.0 size=  401408kB time=00:01:00.71 bitrate=54158.8kbits/s speed=   1x    
frame= 3646 fps= 60 q=-1.0 size=  403712kB time=00:01:01.21 bitrate=54024.8kbits/s speed=   1x    
frame= 3677 fps= 60 q=-1.0 size=  406016kB time=00:01:01.73 bitrate=53878.8kbits/s speed=   1x    
frame= 3707 fps= 60 q=-1.0 size=  408320kB time=00:01:02.23 bitrate=53749.2kbits/s speed=   1x    
frame= 3738 fps= 60 q=-1.0 size=  410880kB time=00:01:02.74 bitrate=53641.3kbits/s speed=   1x    
frame= 3768 fps= 60 q=-1.0 size=  413184kB time=00:01:03.24 bitrate=53515.6kbits/s speed=   1x    
frame= 3799 fps= 60 q=-1.0 size=  415488kB time=00:01:03.76 bitrate=53378.4kbits/s speed=   1x    
frame= 3829 fps= 60 q=-1.0 size=  417792kB time=00:01:04.26 bitrate=53256.9kbits/s speed=   1x    
frame= 3859 fps= 60 q=-1.0 size=  420096kB time=00:01:04.76 bitrate=53137.1kbits/s speed=   1x    
frame= 3890 fps= 60 q=-1.0 size=  422400kB time=00:01:05.28 bitrate=53006.0kbits/s speed=   1x    
frame= 3920 fps= 60 q=-1.0 size=  424704kB time=00:01:05.78 bitrate=52890.1kbits/s speed=   1x    
frame= 3922 fps= 60 q=-1.0 Lsize=  425098kB time=00:01:05.81 bitrate=52913.4kbits/s speed=   1x    
video:425055kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.010058%
Exiting normally, received signal 2.


  


  in my opinion this shouldn't be much of a problem but when i play back the file it has some pretty good "cuts" in there as if the video skips for half of a second. But on a framerate of 60 there must have been a framedrop of 30 frames to achieve this or am i wrong ?

  


  my record script :

  


  ffmpeg -r 60 -loglevel quiet -an -i /dev/video0 -preset ultrafast -vcodec copy test.mp4


  


  is there a way to "smoothen" the loss of frames as seen in the logfile ?

  


  or is there a way to determine what causes the framedrops ? If it is ffmpeg, heavy CPU load or the capture device itself ?

  


  thanks a lot cheers Rudi

  


• How to Use Web Analytics to Improve SEO

  5 janvier 2022, par erin — Analytics Tips

  Everyone wants their website to rank highly in Google — and that’s exactly why the world of SEO is so competitive.

  In order to succeed in such a crowded space, it’s essential to equip yourself with the right tools and processes to ensure your website is maximally optimised for search engines.

  If you’d like to improve your website’s SEO rankings, leveraging web analytics is one of the best places to start. Web analytics provides valuable insights to help you assess performance, user behaviour and optimisation opportunities.

  In this blog, we’ll cover :

  The basics of SEO and web analytics

  Before we discuss how to use web analytics for SEO, let’s start with a quick explanation of both.

  SEO (Search Engine Optimisation) encompasses a broad set of activities aimed at increasing a website’s position in search engine results pages (SERPs). When a user enters a query (e.g. ‘marketing agencies in Dallas’) in a search engine, the websites that appear near the top of the page are optimised for search engines and therefore ranking for that particular term. 

  Web analytics refers to the monitoring/assessment of metrics that track traffic sources and user behaviour on a website. This involves the use of a web analytics tool to collect, aggregate, organise and visualise website data so that meaningful conclusions can be drawn.

  The importance of website analytics for SEO

  SEO revolves around search engine algorithms – a set of rules that dictates a website’s ranking for a given search query (i.e. keyword). The algorithm takes numerous factors into account to determine a particular site’s SERP ranking. So, to achieve strong SEO, your website needs to exhibit qualities that the algorithm deems important. That’s where web analytics comes into play.

  Web analytics allows you to track key metrics and data points that affect how the algorithm ranks your website. For example, how much time do users spend on your site ? Which external links are referring traffic to your site ? How do your site’s Core Web Vitals stack up ? 

  Understanding this data will supply you with the insights needed to make positive adjustments, ultimately improving your website’s SEO. 

  How do you analyse a website for SEO ?

  The SEO analysis of a website needs to be focused on relevant data that’s applicable to search engine rankings. When conducting your website SEO analysis, here are some notable metrics and data fields to pay attention to :

  1. Bounce rate and dwell time

  These metrics denote how much time users spend on your website. If users frequently exit your site after only a few seconds, Google may view this as a negative indicator. To reduce bounce rate and increase dwell time, you should work towards making your site’s content more captivating and ensuring that there aren’t any technical issues with your site (e.g. pages taking too long to load or not optimised for mobile).

  

  2. Broken/dead links

  Perform a technical analysis to scan your website for faulty links. If your site contains broken links that lead to 404 pages, this can detract from your website’s SEO rankings. Redirect those links to a related page or remove them.

  

  Matomo’s Crawling Errors report can give you instant access to this technical information so you can resolve it before it begins to impact your ranking.

  3. Scroll depth

  Measuring scroll depth (how far users scroll down the page) can help you gauge the quality of your content — and this goes hand-in-hand with bounce rate and dwell time. To assess scroll depth, you can use a Tag Manager to track the specific scroll percentage on your site’s pages.

  4. Transitions

  Studying how users transition from page to page within your site can help you understand their behaviour more holistically. Which pages do they tend to gravitate towards ? Are there CTAs on your blog that aren’t driving many click-throughs ? Optimising user journeys will, in turn, elevate the overall user experience on your site.

  

  5. Internal site search

  You can use site search tracking and reporting to learn what your audience is looking for. If you notice a trend (e.g. the majority of searches are for pricing because your pricing page isn’t in the navigation menu), this can inform both site architecture and content planning.

  

  Ecommerce sites in particular should be monitoring branded queries, especially in regards to brand misspellings that could be causing users to bounce off the site.

  6. Segments

  Separating your visitors into distinct segments can produce granular insights that paint a more accurate picture.

  For example, perhaps you notice that your bounce rate is far higher on mobile, or with users from the UK. In both cases, this knowledge will provide clarity on where to focus your optimisation efforts (e.g. mobile responsiveness, UK-specific content/landing pages, etc.).

  

  7. Acquisition channels

  It’s crucial to analyse where your website traffic is coming from. Among other things, reviewing your acquisition metrics will reveal which external websites are referring the most traffic to your website. 

  Links from external sites (also known as backlinks) are one of the most important ranking factors because this tells Google that your site is reputable and credible. So, you may choose to cultivate a relationship with these sites (or similar sites) by offering guest blogging and other link building initiatives.

  

  In addition to the above, you should also be monitoring your Core Web Vitals — which leads us to our next section.

  What are Core Web Vitals and why are they important ?

  Core Web Vitals are a set of 3 primary metrics that reflect the general user experience of a website. These metrics are load time, interactivity and stability. 

  1. Load time (LCP) refers to the amount of time it takes for your website’s text and images to load.
  2. Interactivity (FID) refers to the amount of time it takes for user input areas (buttons, form fields, etc.) to become functional.
  3. Stability (CLS) refers to the visual/spatial integrity of your website. If text, images, and other elements tend to suddenly shift position when a user is viewing the site, this will hurt your CLS score.

  

  So, why are these Core Web Vitals metrics important for SEO ? Generally speaking, Google prioritises user experience — and Core Web Vitals affect users’ satisfaction with a website. Furthermore, Google has confirmed that Core Web Vitals are, indeed, a ranking factor.

  Matomo enables you to track metrics for Core Web Vitals which we refer to as SEO Web Vitals.

  How to measure and track keyword performance

  We can’t talk about SEO and analytics without touching on keywords. Keywords (the words/phrases that users type in a search engine) are arguably the most cardinal component of SEO. So, outside of website performance, it’s also necessary to track the keywords your website is ranking for. 

  Recall from above that SEO is all about ranking highly on SERPs for certain search queries (i.e. keywords). To assess your Search Engine Keyword Performance, you can use an analytics tool to view Keyword reports for your website. These reports will show you which keywords your site ranks for, the average SERP position your site achieves for each keyword, the amount of traffic you receive from each keyword, and more.

  

  Digging into your keyword performance can help you identify valuable keyword opportunities and improvement goals.

  For example, upon reviewing your highest-traffic keywords, you may choose to create more blog content around those keywords to bolster your success. Or, perhaps you notice that your average position for a high-intent keyword is quite low. In that case, you could implement a targeted link building campaign to help boost your ranking for that keyword. 

  Final thoughts

  In this article, we’ve discussed the benefits of web analytics — particularly in regards to SEO. When it comes to selecting a web analytics tool, Google Analytics is by far the most popular choice. But that doesn’t make it the best.

  At Matomo, we’re committed to providing a superior alternative to Google Analytics. Matomo is a powerful, open-source web analytics platform that gives you 100% data ownership — protecting both your data and your customers’ privacy.

  Try our live demo or start a free 21-day trial now – no credit card required.

• Condition to check if a command printed something to stdout

  3 août 2021, par Jesse Hix

  I am trying to create a loop that will return pass or fail if something is printed to stdout using the command below. The command will print info to the screen if a video has audio and it will print nothing if it doesn't. Currently the loop only prints pass on both the audio and non audio files. Is there a way to set the condition to stdout and determine if something was printed ?

  


  ffprobe -i INPUT -show_streams -select_streams a -loglevel error >/dev/null
if [ $? == 0 ]
then    
    echo pass
else
    echo fail
fi