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• Anomalie #3860 : Non prise en compte de la balise `genie` d’un paquet.xml lors du vidage de cache

  9 novembre 2016, par marcimat ☺☮☯♫

  Je pensais bien déplacer plus haut le chargement des chemins et options (le point B que j’indiquais).
  Mais. Cela pourrait potentiellement impacter des plugins qui attendent d’avoir dans leur fichier d’option un ’spip_pipeline’ un peu rempli.

  Mais je vois 1 plugin (1 seul sur la zone il me semble) que ma pourrait impacter : Fastcache. (En fait non car Mutualisation déclare son pipeline dans son fichier d’option aussi donc, ça ne s’applique pas pour lui) mais je le mets pour l’exemple : si je remonte un peu le chargement des fichiers d’options, la globale ’spip_pipeline’ ne sera pas remplie par les pipelines déclarés dans les plugin.xml ou paquet.xml des plugins à activer.
  Or, dans Fastcache on a cette écriture :
  

  # s’inserer au *debut* du pipeline affichage_final pour etre avant f_surligne etc
  # mais de preference apres mutualisation_url_img_courtes pour qu’il s’applique
  $GLOBALS[’spip_pipeline’][’affichage_final’] = preg_replace(
      ’,|mutualisation_url_img_courtes|^,
      ’,’\0|Fastcache_affichage_final’, 
      $GLOBALS[’spip_pipeline’][’affichage_final’]
  ) ;
  

  On peut peut être du coup supposer que d’autres plugins dans la nature font de même ?
  Ça se mord un peu la queue tout de même, vu que le fichier de chargement des pipelines (tmp/cache/charger_pipelines) pourrait aussi avoir besoin d’infos qui sont chargées dans les fichiers d’options de plugins. En tout cas là pour cette balise <genie></genie> tel que c’est codé il en a besoin (des chemins au moins).

  Cependant je serai d’avis tout de même de recharger les chemins et options plus tôt (spip_pipeline sera presque vide dans les fichiers d’options), en considérant que le fichier d’option sert à remplir justement ce fichier de pipeline, pas à modifier des fonctions qu’ont demandé d’autres plugins.

  Voici un patch, pour voir ce que j’indique en B donc, en pièce jointe.

• Convert H.264 Annex B to MPEG-TS

  24 octobre 2019, par Lane

  SO...

  I have RAW H.264 video data captured via RTSP in a local file and I am attempting to playback the video in a Java FX application. In order to do this, I need to use Http Live Streaming.

  I have successfully prototyped a Java FX architecture that can play a video via HLS with a local server using a local folder containing a .m3u8 (HLS index) file and collection of .ts (MPEG-TS) files. The last piece for me is to replace the .ts files with .264 / .h264 files and in the local server, perform the conversion / wrapping of the H.264 Annex B data into MPEG-TS.

  I am having trouble figuring out what is required to get H.264 Annex B into MPEG-TS. I have found the following information...

  "Annex B is commonly used in live and streaming formats such as
  transport streams..."

  szatmary.org/blog/25

  "Annex B of of the document specifies one such format, which wraps NAL
  units in a format resembling a traditional MPEG video elementary
  stream, thus making it suitable for use with containers like MPEG
  PS/TS unable to provide the required framing..."

  wiki.multimedia.cx/ ?title=H.264

  "Java FX supports a number of different media types. A media type is
  considered to be the combination of a container format and one or more
  encodings. In some cases the container format might simply be an
  elementary stream containing the encoded data."

  docs.oracle.com/javafx/2/api/javafx/scene/media/package-summary.html

  "Use the CODECS attribute of the EXT-X-STREAM-INF tag. When this
  attribute is present, it must include all codecs and profiles required
  to play back the stream..."

  developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/FrequentlyAskedQuestions/FrequentlyAskedQuestions.html

  It seems like I am missing something simple around Elementary and Transport Streams. I have used ffmpeg to convert my H.264 file into a TS file and try to understand the differences. I have an idea of the approximate format differences, but I am still lacking on the details to do it. Does anyone have a link showcasing this or know something simple about how to serve H.264 Annex B data over MPEG-TS ?

  I am not looking to use a tool, I need to have a custom file format locally where I parse out the H.264 Annex B data and perform the format change in memory, on the fly. I know of a way to use ffmpeg with pipes to accomplish this, but I do not want to have any dependencies and performance is important.

• Convert H.264 Annex B to MPEG-TS

  4 juin 2014, par Lane

  SO...

  I have RAW H.264 video data captured via RTSP in a local file and I am attempting to playback the video in a Java FX application. In order to do this, I need to use Http Live Streaming.

  I have successfully prototyped a Java FX architecture that can play a video via HLS with a local server using a local folder containing a .m3u8 (HLS index) file and collection of .ts (MPEG-TS) files. The last piece for me is to replace the .ts files with .264 / .h264 files and in the local server, perform the conversion / wrapping of the H.264 Annex B data into MPEG-TS.

  I am having trouble figuring out what is required to get H.264 Annex B into MPEG-TS. I have found the following information...

  "Annex B is commonly used in live and streaming formats such as
  transport streams..."

  szatmary.org/blog/25

  "Annex B of of the document specifies one such format, which wraps NAL
  units in a format resembling a traditional MPEG video elementary
  stream, thus making it suitable for use with containers like MPEG
  PS/TS unable to provide the required framing..."

  wiki.multimedia.cx/ ?title=H.264

  "Java FX supports a number of different media types. A media type is
  considered to be the combination of a container format and one or more
  encodings. In some cases the container format might simply be an
  elementary stream containing the encoded data."

  docs.oracle.com/javafx/2/api/javafx/scene/media/package-summary.html

  "Use the CODECS attribute of the EXT-X-STREAM-INF tag. When this
  attribute is present, it must include all codecs and profiles required
  to play back the stream..."

  developer.apple.com/library/ios/documentation/networkinginternet/conceptual/streamingmediaguide/FrequentlyAskedQuestions/FrequentlyAskedQuestions.html

  It seems like I am missing something simple around Elementary and Transport Streams. I have used ffmpeg to convert my H.264 file into a TS file and try to understand the differences. I have an idea of the approximate format differences, but I am still lacking on the details to do it. Does anyone have a link showcasing this or know something simple about how to serve H.264 Annex B data over MPEG-TS ?

  I am not looking to use a tool, I need to have a custom file format locally where I parse out the H.264 Annex B data and perform the format change in memory, on the fly. I know of a way to use ffmpeg with pipes to accomplish this, but I do not want to have any dependencies and performance is important.