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• configure : Include the armcc build number in the compiler identification

  28 juillet 2014, par Martin Storsjö

  configure : Include the armcc build number in the compiler identification
  This tries to find the most expressive part of the output of
  
  armcc —vsn to include, giving a compiler identification of
  
  "ARM Compiler 5.04 update 2 (build 82)" instead of just
  
  "ARM Compiler 5.04" for armcc 5.0.
  4.x versions of armcc output the following, for "armcc —vsn" :
  
  ARM C/C++ Compiler, RVCT4.0 [Build 925]
  
  For evaluation purposes only
  
  Software supplied by : ARM Limited
  ARM C/C++ Compiler, 4.1 [Build 894]
  
  For evaluation purposes only
  
  Software supplied by : ARM Limited
  5.0 versions output this :
  
  Product : ARM Compiler 5.04
  
  Component : ARM Compiler 5.04 update 2 (build 82)
  
  Tool : armcc [5040081]
  
  For evaluation purposes only
  
  Software supplied by : ARM Limited
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] configure

• Webcam recording with FFmpeg through USB over UTP

  13 septembre 2021, par z32a7ul

  I'm trying to record my webcam with FFmpeg.

  


  I listed the devices with this line :

  


  ffmpeg -list_devices true -f dshow -i dummy


  


  And I test the settings with this one :

  


  ffplay -loglevel verbose -f dshow -rtbufsize 100M -video_size 1280x720 -framerate 60 -video_device_number 0 -audio_device_number 0 -i video="C922 Pro Stream Webcam":audio="Microphone (C922 Pro Stream Web"


  


  The first command outputs this :

  


  ffmpeg version n4.4-10-g75c3969292 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[dshow @ 000000000035a000] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000035a000]  "C922 Pro Stream Webcam"
[dshow @ 000000000035a000]     Alternative name "@device_pnp_\\?\usb#vid_046d&pid_085c&mi_00#9&1da24ac&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000000000035a000] DirectShow audio devices
[dshow @ 000000000035a000]  "Microphone (C922 Pro Stream Web"
[dshow @ 000000000035a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (C922 Pro Stream Web"
[dshow @ 000000000035a000]  "Microphone (Realtek High Defini"
[dshow @ 000000000035a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (Realtek High Defini"
dummy: Immediate exit requested


  


  And the second one this :

  


  ffplay version n4.4-10-g75c3969292 Copyright (c) 2003-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Initialized direct3d renderer.
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   170103 timestamp 2074640340000 orig timestamp 2074640336004 graph timestamp 2074640340000 diff 3996 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   166381 timestamp 2074640500000 orig timestamp 2074640502670 graph timestamp 2074640500000 diff -2670 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
dshow passing through packet of type video size   173348 timestamp 2074640820000 orig timestamp 2074640816017 graph timestamp 2074640820000 diff 3983 C922 Pro Stream Webcam
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   
...


  


  However, if I use a USB cable extender (USB over UTP - This thing consist of two parts : the first one has a male, the second one a female USB A, and they are linked through RJ45 sockets and a Cat5e UTP cable), it does not work at all. The first command prints the same :

  


  ffmpeg version n4.4-10-g75c3969292 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
[dshow @ 000000000039a000] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000000000039a000]  "C922 Pro Stream Webcam"
[dshow @ 000000000039a000]     Alternative name "@device_pnp_\\?\usb#vid_046d&pid_085c&mi_00#9&1da24ac&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000000000039a000] DirectShow audio devices
[dshow @ 000000000039a000]  "Microphone (C922 Pro Stream Web"
[dshow @ 000000000039a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (C922 Pro Stream Web"
[dshow @ 000000000039a000]  "Microphone (Realtek High Defini"
[dshow @ 000000000039a000]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (Realtek High Defini"
dummy: Immediate exit requested


  


  But the second fails with "Could not set video options" :

  


  ffplay version n4.4-10-g75c3969292 Copyright (c) 2003-2021 the FFmpeg developers
  built with gcc 10-win32 (GCC) 20210408
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --enable-libvmaf --enable-vulkan --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec --enable-cuda-llvm --enable-libglslang --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Initialized direct3d renderer.
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   

[dshow @ 00000000004de180] Could not set video options
video=C922 Pro Stream Webcam:audio=Microphone (C922 Pro Stream Web: I/O error


  


  What can be the problem ? Is it the extender cable ? What are FFmpeg's requirement on USB cables (and extenders) ?

  


• Introducing Matomo SEO Web Vitals

  13 septembre 2021, par Ben Erskine — About, Analytics Tips, Plugins

  SEO Web Vitals track your critical website performance metrics and are a core element of SEO best practice. 

  Start using Matomo SEO Web Vitals to monitor your website performance, optimise your visitor experience, improve your search result rankings, and see how your site compares to your competitors.

  

  What are SEO Web Vitals ?

  Web Vitals are made up of a number of important metrics, such as your website’s page speed and loading performance, these metrics all play an important role in search engine optimisation. 

  The more technical terms for these metrics are Page Speed Score, First Contentful Paint (FCP), Final Input Delay (FID), Last Contentful Paint (LCP) and Cumulative Layout Shift (CLS).

  Why should you use SEO Web Vitals ?

  SEO Web Vitals are being used more and more by search engines such as Google to rank websites so they help ensure a great page experience for users who arrive via links from their search results. 

  By monitoring your SEO Web Vitals you can see how good or bad a single page performs and then prioritise the optimisation of strategically important pages to help improve the ranking position within search engine results.

  For ease of use you can receive regular reports in your email inbox and you can configure custom alerts to automatically notify you when a page score changes significantly. This saves time by not having to check page performance scores manually while ensuring you will be notified should there be any important change that needs to be actioned.

  You should use SEO Web Vitals to understand how your site performance is impacting your overall visitor experience.

  Four key benefits of using SEO Web Vitals :

  Improve your search result rankings

  • SEO Web Vitals are a core element of SEO best practice and directly impact your search rankings.
  • Pages that load quickly and are more stable deliver a better user experience, so they’re ranked higher by search engines.

  Optimise your website visitor experience

  • Know how quickly pages on your website load to ensure you deliver an optimal visitor experience.
  • Identify page stability issues and implement the changes needed to enhance your visitor experience.

  Automate your website performance monitoring

  • Have peace of mind knowing if your metrics decrease, you can find and fix the root cause quickly.
  • Configure performance alerts and get automated reports sent to you.

  Incorporate website performance into your competitor analysis

  • These performance metrics are essentially open for anyone to inspect, so you can measure and benchmark your site against competitors. 

  How can I improve my SEO Web Vitals ?

  There are so many ways to improve these performance metrics, here are five of the common contributing factors.

  1. Your page speed score is a weighted average of your other performance metrics, so focus on improving the underlying metrics that contribute to this score.
  2. Ensure you use a high quality web host with an appropriate plan for your level of traffic to help improve your FCP time.
  3. Try removing large elements that aren’t required on your page to improve your LCP time.
  4. Optimise against Total Blocking Time to Improve your FID score.
  5. Consider using a Layout Shift Debugger to improve Your CLS Score

  Guide to Matomo SEO Web Vitals

  For more information and to learn how to configure SEO Web Vitals in Matomo, check out our full guide to SEO Web Vitals.

  You will learn :

  • What’s required to measure your SEO Web Vitals
  • How to configure SEO Web Vitals
  • How to analyse your SEO Web Vitals
  • How to understanding SEO Web Vitals metrics
  • How to analyse your page’s SEO Web Vitals over time
  • How to improve your SEO Web Vitals
  • How to monitor changes in your scores with custom alerts

  Need more resources ?

  Matomo Plugin SEO Web Vitals

  Matomo SEO Web Vitals FAQs