Recherche avancée

Sur d’autres sites (6162)

• Anomalie #3181 (Nouveau) : mots et groupes - API d’édition des objets

  7 mars 2014, par Sylvain Lesage

  Les fonctions d’action du plugin mots ne semblent pas suivre les mêmes règles que l’API d’édition des objets, ce qui en permet pas d’utiliser ces fonctions génériques pour les mots ou les groupes de mots (me semble-t-il). Est-il envisageable de les adapter au format défini par l’API ?

  Insertion¶

  API : objet_inserer

   bool | int objet_inserer( string $objet , int $id_parent = null , array | null $set = null ) 
  

  Mot : mot_inserer

   int | bool mot_inserer( int $id_groupe ) 
  

  Groupe de mots : groupemots_inserer

   int | bool groupemots_inserer( string $table = ’’ ) 
  

  Modification¶

  API : objet_modifier

   mixed | string objet_modifier( string $objet , int $id , array | null $set = null ) 
  

  Mot : mot_modifier

   string | null mot_modifier( int $id_mot , array | null $set = null ) 
  

  Groupe mots : groupemots_modifier

   string | null groupemots_modifier( int $id_groupe , array | null $set = null ) 
  

• Use an IP-camera with webRTC

  11 avril 2016, par Minz

  I want to use an IP camera with webrtc. However webrtc seems to support only webcams. So I try to convert the IP camera’s stream to a virtual webcam.

  I found software like IP Camera Adapter, but they don’t work well (2-3 frames per second and delay of 2 seconds) and they work only on Windows, I prefer use Linux (if possible).

  I try ffmpeg/avconv :

  • firstly, I created a virtual device with v4l2loopback (the command was : sudo modprobe v4l2loopback). The virtual device is detected and can be feed with a video (.avi) with a command like : ffmpeg -re -i testsrc.avi -f v4l2 /dev/video1

  • the stream from the IP camera is available with : rtsp://IP/play2.sdp for a Dlink DCS-5222L camera. This stream can be captured by ffmpeg.

  My problem is to make the link between these two steps (receive the rstp stream and write it to the virtual webcam). I tried ffmpeg -re -i rtsp://192.168.1.16/play2.sdp -f video4linux2 -input_format mjpeg -i /dev/video0 but there is an error with v4l2 (v4l2 not found).

  Does anyones has an idea how to use an IP camera with webRTC ?

• How to convert from AV_PIX_FMT_BGRA to PIX_FMT_PAL8 ?

  29 juillet 2014, par Jona

  I’m having a hard time converting my images from AV_PIX_FMT_BGRA to PIX_FMT_PAL8. Unfortunately sws_getCachedContext doesn’t support the conversion to PIX_FMT_PAL8.

  What I’m trying to do is convert my images into a GIF video with higher quality output. It seems that PIX_FMT_PAL8 could potentially provide the higher quality output I’m looking for.

  According to this documentation I need to palettize the pixel data, but I have no clue how to do that.

  When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
  image data is stored in AVFrame.data[0]. The palette is transported in
  AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
  formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
  also endian-specific). Note also that the individual RGB palette
  components stored in AVFrame.data[1] should be in the range 0..255.
  This is important as many custom PAL8 video codecs that were designed
  to run on the IBM VGA graphics adapter use 6-bit palette components.

  Any help or direction would be appreciated.