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• Anomalie #4569 (Nouveau) : Accessibilité, boutons et javascript

  5 octobre 2020

  Il y a 2 types de boutons qui ne répondent peut-être pas aux critères d’accessibilité, à vérifier.

  Bouton « Détails » dans le modèle document_desc¶

  Ce bouton sert à afficher ou masquer les détails complets d’un document.
  Actuellement c’est juste un lien <a></a> sans href et du javascript inline :

  <span class="CodeRay"><span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">lien_details bouton link</span><span class="delimiter">"</span></span> 
  
      <span class="attribute-name">onClick</span>=<span class="string"><span class="delimiter">"</span><span class="predefined">$</span>(<span class="local-variable">this</span>).parent().next(<span class="string"><span class="delimiter">'</span><span class="content">.detaillees</span><span class="delimiter">'</span></span>).toggle(); <span class="keyword">return</span> <span class="predefined-constant">true</span>;<span class="delimiter">"</span></span> 
  
      <span class="attribute-name">title</span>=<span class="string"><span class="delimiter">"</span><span class="content">&lt;:medias:details_document_afficher_masquer|attribut_html:</span></span><span class="error">></span>"<span class="error">></span><span class="tag">&lt;:medias:details_document:></span><span class="tag"></span>
  
  </span></span>

  Boutons pour changer le mode d’affichage¶

  Il s’agit des 3 boutons ajoutés en javascript qui permettent de changer le mode d’affichage de la liste des documents liés.
  Ils sont générés en javascript dans gestion_listes_documents.js.
  Là il s’agit d’un simple <span></span>. Un clic dessus toggle des classes sur une cible.

  <span class="CodeRay">
  
  <span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">affichages</span><span class="delimiter">"</span></span><span class="tag">></span>
  
    <span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">icone grand on</span><span class="delimiter">"</span></span> <span class="attribute-name">title</span>=<span class="string"><span class="delimiter">"</span><span class="content">Affichage en grand</span><span class="delimiter">"</span></span><span class="tag">></span><span class="tag"></span></span>
  
    <span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">icone cases</span><span class="delimiter">"</span></span> <span class="attribute-name">title</span>=<span class="string"><span class="delimiter">"</span><span class="content">Affichage en cases</span><span class="delimiter">"</span></span><span class="tag">></span><span class="tag"></span></span>
  
    <span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">icone liste</span><span class="delimiter">"</span></span> <span class="attribute-name">title</span>=<span class="string"><span class="delimiter">"</span><span class="content">Affichage en liste compacte</span><span class="delimiter">"</span></span><span class="tag">></span><span class="tag"></span></span>
  
  <span class="tag"></span>
  
  </span></span>

• Where can I find ffmpeg codecs for Windows Chromium (h.264, AAC, mp3..) ?

  21 décembre 2013, par masfrost

  In previous version you could copy files from google Chrome's folders and paste them into the Chromium files, but that doesn't work anymore. Apparently all the files have been replaced by 1 file ffmpegsumo.dll, copying that from Chrome changes nothing.

  I downloaded codecs for Chromium on linux, but I find it weird that there's no way to get them for Windows.

  Why don't they just add h.264 to chromium now that cisco made it royalty free ?

• FPS from RTSP stream info does not match actual framerate

  17 mai 2021, par Krapow

  I have a 25FPS RTSP stream coming from an IP-camera. I can successfully display the video stream. But when analyzing the stream with ffmpeg (ffprobe actually), I observe fewer frames per second rate :

  


  $ ffprobe -rtsp_transport tcp -i rtsp://camera_ip:554/stream -select_streams v:0 -show_frames -show_entries frame=coded_picture_number,pkt_pts_time -of csv=p=0
Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 640x480, 25 fps, 25 tbr, 90k tbn, 50 tbc
0.400000,0
0.080000,1
0.120000,2
0.200000,3
0.240000,4
0.320000,5
0.360000,6
0.440000,7
0.480000,8
0.560000,9
0.600000,10
0.680000,11
0.720000,12
0.800000,13
0.840000,14
0.920000,15
0.960000,16
1.040000,17
1.080000,18
1.160000,19
1.200000,20
1.280000,21
1.320000,22
1.400000,23
1.440000,24
1.520000,25
1.560000,26
1.640000,27
1.680000,28
1.760000,29
1.800000,30
1.880000,31
1.920000,32
2.000000,33


  


  We can clearly see the 80ms gap between some of the frames, resulting in a 16fps stream.

  


  I have observed the same framerate issue with GStreamer (printing information in the rtpjitterbuffer indicates the frame gap is sometimes 80ms and sometimes 40ms). But the weird thing is, I encountered the same issue with an HDMI-RJ45 decoder, and I doubt the same issue comes from 2 different devices.
I didn't get much more informations using -loglevel debug or trace.
Does anybody have an idea about what is going wrong in the stream ?

  


  (I used ffprobe 4.2.3 and the last "2021-05-09-git-8649f5dca6-full_build-www.gyan.dev" with the same results, and GStreamer 1.16.2 with a pipeline like "urisourcebin ! h264depay ! h264parse ! fakesink")

  


  EDIT : The camera skipping of frames was caused by the activation of a third stream in the options. I find it really weird that it skips exactly the same frames every seconds. However, I still haven't found the cause of the downrate on my RTSP encoder.
Anyway, this was actually hardware related and not software related.