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• Anomalie #2988 (Nouveau) : Bug squelette liste des messages internes

  30 avril 2013, par Eric Camus

  Bonjour,

  Avec SPIP 3.0.8 de base mais en retirant le plugin-dist "breves" (Windows + IIS 6 + PHP 5.2.17).

  Attention : dans l’interface d’administration.

  Il y a une erreur dans la page "ecrire/index.php ?exec=controler_forum&type_message=interne" qui fait appel au modèle "prive/modeles/forum.html" sur les ligne 25 et 26 qui sont des boucles sur les objets "breves" et "sites" qui peuvent avoir étés supprimés (ou surtout pas installé au départ -> pas de tables dans la base).

  De plus quand on est sur un message général, apparait un lien sur le titre du message qui est en 404 !!

  J’ai pour ma part remplacer les ligne 23 à 31 par :

  [(#OBJET|oui)
  

  #OBJET : [(#TITRE| ?#TITRE,#NOM)]
  #SETvoir,’

  ’
  ]

  Mais c’est juste une proposition qui affiche quelque chose de non satisfaisant au niveau de l’écriture (juste le nom de l’objet, non traduit aussi) mais qui n’affiche rien pour les messages généraux.

  Nota : il y a d’autres références a des boucles (id) "breves" et "sites" dans ce plugin ...(futur bug de nécessité).

• uploading video to ftp while transcoding with Xuggler

  27 novembre 2013, par Holly

  I'm trying to transcode a video on a client PC (Win, Linux, IOS - x32 or x64 - all 6) and write the output directly to a ftp server using Xuggler. With pure ffmpeg it would look like this :

  ffmpeg -i "local.mp4" -ftp-write-seekable 0 -c:v libx264 -crf 25 -f flv ftp://user:pass@server.net:1234/uploaded.flv

  I'm assuming that it must be possible since ffmpeg can do it and Xuggler is supposed to be a wrapper for ffmpeg. I got it working using exec("ffmeg") but it needs to work on all 6 OS mentioned above.

  I tried to addapt this example : https://groups.google.com/forum/# !msg/xuggler-users/QeFTxqgc8Bg/0j1ntsl3tI0J by just using a ftp://user:pass@server.net:1234/uploaded.flvas the url but that does not work. Xuggler is unable to create a container based on such an url.

  I guess I should be able to write into an OutputStream and have ftp4j read from that stream and write to ftp. What would I need to consider for that ?

  Failing all else I could write into a temp file and upload that, but I really don't like that as a solution.

  1. Can someone please provide me with a code example of how to make Xuggler write to ftp directly ?

  2. As a side question. I'm still looking into how to best capture data for displaying the progress in the GUI. So far I found : IMediaListener onWritePacket(IWritePacketEvent event) which I would register to the writer. However I'm not sure how to get the details ffmped reports (current compression, output size so far). The only useful info I found so far is the TimeStamp. Any help on that would also be most welcome.

• FFMPEG libavformat internal buffering

  4 octobre 2013, par Theodor

  I'm using FFMPEG for a C++ audio streaming and playback application.

  I use the avformat_open_input function to open an URL to an external compressed audio file and then I step through to stream using av_read_frame. Then for each packet i directly decode the data and queue it in the audio buffer using OpenAL.

  My question is if FFMPEG internally prebuffers compressed data from the external URL ?

  Does FFMPEG keep downloading data in the background even if I don't call av_read_frame ?

  Or is it my responsibility to maintain a intermediate buffer where I download as many packets as possible ahead of time to avoid starving the audio-playback ?

  If so, how much does it buffer/download internally ? Can I configure this ?

  I have been looking through the documentation but have not found any information on this.

  Thanks.

  Update :
  According to this thread http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=15&t=376 libav should by default prebuffer about 5MB depending on AVFormatContext::max_analyze_duration. However I haven't noticed this behavior and it doesn't seem to change if I alter max_analyze_duration.

  If I monitor the memory consumption of my process it doesn't increase after I call avformat_open_input and if I simulate slow-network, av_read_frame directly stops working like if it didn't have any packets buffered.