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• FFMPEG Wrapping a raw video stream with OGG (or another wrapper)

  9 juillet 2014, par Cykon

  I’m building an application which takes in a rawvideo stream (piped in from an ffmpeg instance), manipulates and reads the raw video data, and pipes the output to another ffmpeg instance for encoding. Everything works great, however I’ve been trying to think of a solution which would allow audio to be sent into my program as well.

  The Ogg container seems to have a great C library, and it appears as if there has been some movement to add support for raw video https://wiki.xiph.org/OggRGB

  My plan was to pipe in a stream formatted for Ogg, use libogg to demux it, after parsing through the video data and manipulating it... use libogg again to encode and pipe out.

  Unfortunately, FFMPEG throws an "Unsupported codec id in stream 0" error when asked to output OGG with rawvideo.

  My test ffmpeg command is as follows :

  ffmpeg.exe -i fs0.mp4 -f ogg -c:v rawvideo -pix_fmt rgb24 -s 192x144 -

  Any solutions, or alternative solutions are welcome. As a side note, my program has the ability to take in multiple videos at once and outputs a combination of the inputs.

• Evolution #4496 (En cours) : [Cohérence d’interface] Harmonisation de la gestion des doc/logos en 3.3

  25 mai 2020

  Bonjour,

  Contexte¶

  Je viens de tester la migration de 2 sites en mutualisation facile de 3.2.7 SVN à 3.3 SVN.
  Nickel, ça marche.
  J’ai pu vérifier que les logos étaient bien déplacés dans sites/nomdedomaine/IMG/logo/

  Mais, j’avais cru comprendre que les logos devenaient des documents comme les autres, ce qui permettrait de les réutiliser via la bibliothèque.

  Constat¶

  Et là, c’est le drame.
  Les logos ne sont pas listés dans la bibliothèque.

  Réciproquement, l’upload des logos est identique aux versions précédentes de SPIP.
  Donc, ne permet :

  • ni d’aller chercher un logo dans la bibliothèque
  • ni de modifier un logo (il faut comme avant le supprimer, ce qui pose problème quand on veut modifier le logo normal et qu’il y a un logo de survol).

  Bref, c’est peut-être un chantier pour 3.4, mais en l’état, cette conversion des logos en documents ne me semble rien apporter pour l’utilisateur final.

  Comportements attendus¶

  • téléversement des logos utilisant les mêmes mécanismes que ceux des documents/images
  • boite d’édition d’un logo semblable à celle des documents, permettant entre autre de changer le fichiers du logo
  • logos listés dans la médiathèque
  • logos utilisable comme images dans les articles

• FFmpeg MSVC Compilation stuck

  10 mai 2017, par Earinor

  For several days now I try to build the FFmpeg Libraries. I’m using Windows7 64 Bit and MSVC2010. I followed this guide : https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

  I got rid of a view errors and configure is working finally. But when I try make, it runs for like half an hour and then gets stuck. It won’t proceed, I kept it running over night and nothing happend. I also tried different compiler options but it gets stuck every time at the same point.

  ffv1dec.o_converted.c
  
  d:\cpplibraries\ffmpeg-master\libavcodec\get_bits.h(308) : warning C4101: 're_cache' : unreferenced local variable
  
  d:\cpplibraries\ffmpeg-master\libavcodec\golomb.h(360) : warning C4245: '=' : conversion from 'int' to 'unsigned int', signed/unsigned mismatch

  I also tried setting up a minGW64 Msys2 Environment but have the same issue there.
  I also tried another setup but when I get rid of some errors I always get stuck at the exact same position.

  The cl.exe is running and is using memory but nothing happens.

  I also get a ton of warnings like conversions from int to unsigned int, Makro redefinitions, etc.

  I have no idea where to look to fix this, so I would appreciate some help.