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Médias (1)

Mot : - Tags -/lev manovitch

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  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • Déploiements possibles

    31 janvier 2010, par

    Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
    L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
    Version mono serveur
    La version mono serveur consiste à n’utiliser qu’une (...)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

Sur d’autres sites (3756)

  • 10 Proven Ways Heatmaps Improve Website Conversions

    20 septembre 2021, par Ben Erskine — Analytics Tips, Plugins, Heatmap

    Heatmap analytics are critical in improving website conversions. Why ? Because they provide customer-centric insights. 

    In the online market, businesses that are customer-centric are 60% more profitable than businesses that are not.

    Using heatmaps to track factors such as usability, compare A/B landing pages and content engagement across channels optimises online conversions by addressing issues faced by real users. 

    How heatmaps benefit your customers

    Customer experience is one of the most important factors in business success. 

    Website heatmap software like Matomo offers unique insights into customer behaviour that is then used to improve their experience, usability and engagement. 

    Data analysis captures information on how many people complete a sales funnel or bounce from a website. Behavioural analytics like heatmaps can show you why they bounce.

    This benefits your customers (and therefore your bottom line) because it puts the focus on them and their needs.

    10 ways heatmap analytics help increase website conversions

    #1. Improve UX/Usability 

    Heatmap analytics improve usability by identifying where you are losing customers on your website.

    Forrester research indicates that improving user experience can improve conversions by up to 400%, and on average every $1 spent on UX has a return of $100

    For example, you may have a CTA button but customers never click it to reach the payment page. 

    Heatmaps show you how customers interact with your website naturally so that you can adjust it according to their needs.

    Using heatmap analytics to improve usability boosts conversions because it improves customer experiences. 88% of online consumers say that they wouldn’t even bother returning to a website after a bad experience. 

    #2. Website design and content structure 

    Another way that heatmaps can improve conversions is to analyse your website design and content structure. 

    You might be wondering how often a specific ad or a banner was displayed and viewed by your visitors on any of your pages and how often a visitor actually interacted with them. These two parts of the analysis are called content impression and content interaction.

    Ideally, your website elements such as banners, listings, buttons and thumbnails will entice customers to click and find out more. 

    Heatmaps and click maps analyse

    1. How many impressions the content has (e.g. a banner), and
    2. What percent of users that see the content click on it 

    For example, you may have a banner with high impressions but low click-through rates. Tracking content interactions optimises your website by showing which elements or CTAs need more visibility. 

    #3. A/B testing

    Heatmaps provide invaluable data on which landing pages are converting the best. Not only that, but session recordings and heatmap data can show you exactly why one is converting better so that you can replicate the results to increase conversions on other landing pages.

    Tracking heatmap updates on different versions of the same sales page will help confirm creative solutions faster than feedback alone. 

    Ultimately this kind of comparison increases your ROI faster because you are not guessing why some customers are converting and others are not. 

    #4. Conversion Funnel

    Using heatmap software in sales funnels lets you visualise user behaviour at each stage of the conversion process. 

    For example, if many customers are dropping off a payment page, heatmaps can indicate whether it is a usability issue such as pop ups, lack of clarity with payment buttons or something web developers haven’t seen from the back end. 

    These analytics improve conversions by reducing friction in sales funnels as much as possible. 

    #5. Content engagement across channels 

    Optimising websites across all channels is now expected for online businesses. 

    Bad mobile optimisation annoys 48% of online shoppers, and if your web page takes longer than 3 seconds to load, 53% of visitors will simply click away. 

    You can use heatmaps to improve engagement by tracking mouse activity, clicks and scrolling. This helps improve conversions by confirming 

    • How invested a user is in the page 
    • How easy it is to navigate your website and content on different devices 
    • What is your most viewed content and what to push more of 
    • How users generally move through your website on different devices 
    • How clear your messaging is (e.g. high click through rate but low engagement could indicate they aren’t finding what they’re looking for once they click on a CTA)

    #6. Above the fold analysis 

    Although a well-used web development term, above the fold is still one of the most important factors in heatmap analysis. 

    Above the fold analysis gives you insight into a customer’s first impression of a page. 

    An example of above-the-fold heatmaps in action could be a page with a video explanation. Say you have a landing page with a video below the fold that explains why someone should buy and has a CTA button underneath. If there are a lot of page visitors but very few people scrolling below the fold, you can see why hardly any visitors are watching the video or engaging with the CTA button. 

    Insights like this would inform further development such as including important video content above the fold or updating header copy to encourage visitors to scroll down the page more often.

    #7. Session recording

    Recording features go hand in hand with heatmap visualisations. Recording features like Session Recording shows the flow of each user’s time on your website. 

    For example, a session recording replays all clicks, mouse movements, scrolls, window resizes, form interactions, and page changes (e.g. when a popup appears).

    #8. Scroll heatmap 

    A scroll heatmap shows the percentage of people that have seen a part of the page. 

    For example, the top of a website page will be the “hottest” in a scroll heatmap, and it naturally gets “colder” further down.

    Tracking this shows whether customers are staying on the page, whether they are only seeing information above the fold, and whether sales pages are engaging. 

    It is an effective strategy for improving sales pages because it shows where customers are losing interest and which elements receive the most engagement.

    #9. Records clicks 

    With a click heatmap, you can find out what your visitors think is clickable on a webpage.

    This improves conversions in two ways. 

    Firstly, it shows whether customers are clicking where you expect them to. For example, if you create a “buy now” or “free trial” button but nobody ever pushes it, it informs your back end developers that it needs an upgrade. 

    Secondly, it indicates any user experience issues. If there are a lot of clicks on an element that doesn’t link anywhere, it shows that it either needs to be changed or have a link included because customers are trying to engage with it. 

    For even more accurate data, combine click maps with hover maps. This shows where users are paying attention but not clicking through. 

    #10. Records mouse movement/hovering

    Is your website distracting users from the ultimate goal of converting ? Does your website have a logical flow and next step ? Recording mouse movement and attention will help you answer questions like these. 

    Mouse move and hover heatmaps identify where your website visitors engage on the page. Are they naturally drawn to your CTAs ? Is the sidebar taking their attention away from the primary content ? 

    This data increases the likelihood of conversions because it shows where you need to remove distractions or draw their attention in. 

    Matomo's heatmaps feature

    Final thoughts on heatmap analytics 

    Heatmap analytics benefit both you and your customers. By identifying issues that stop them from buying and optimise their engagement, you’ll have happy customers and happy stakeholders. 

    Next, check out these guides on heatmap software and using user behaviour analytics to increase conversions and improve customer experience !

    The Ultimate Guide to Heatmap Software

    Heatmap Video

    Session Recording Video

  • 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) ?

    


  • ffmpeg Output file #0 does not contain any stream during the extraction of audio from a .webm file

    17 mai 2023, par Leo

    my objective is to extract frames and corresponding audio from a .webm file.

    


    The problem comes when I am extracting the audio from the .webm file.

    


    When I try to extract the audio from the .webm. ffmpeg -i _5rNOD1nsDg.webm -vn -y -ar 44100 -ac 2 output.wav

    


    I get something like below and there is not any .wav file generated.
 ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 11 (Ubuntu 11.2.0-19ubuntu1) configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --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-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared 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 Input #0, matroska,webm, from '_5rNOD1nsDg.webm': Metadata: encoder         : google/video-file Duration: 00:10:08.96, start: 0.000000, bitrate: 18219 kb/s Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 3840x2160, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Output #0, wav, to 'output.wav': Output file #0 does not contain any stream