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Autres articles (58)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (11235)

  • How do I reduce the video size captured by the default camera using FFMPEG in Android ?

    12 octobre 2011, par Krishnendu

    I am trying to reduce the video size captured by the default camera (it's generating high resolution video) in Android. Does FFMPEG have a property to encode a video with given resolution ? I tried to Google, but all examples are using command line mode for FFMPEG.

    My questions are :

    1. Can we use ffmpeg command line in Android ?
    2. If not then how we will achieve it ?
    3. Can we able record a video directly using ffmpeg in Android ?
    4. Is there any other solution for this ?

  • Encoding a group of images with ffmpeg or mencoder

    5 novembre 2011, par user846400

    I have a group of H.264 images (I-frames only) that I want to encode into JPEG with a single command. For a single image encoding, I can use the following (ffmpeg) :

    ffmpeg -i raw_image image.jpg

    It works fine. What about a list of images ? I have tried the following, but it doesn't work :

    ffmpeg -i raw_image%d image%d.jpg

    I need a solution either in ffmpeg or mencoder. Any help will be appreciated.

  • Decoding RIMM streaming file format

    10 septembre 2011, par Thomas

    I want to decode the video (visual) frames within a Blackberry RIMM file. So far I have a parser, and some corresponding container documentation from RIM. 

    The video codec is H264 and is explicitly set on the device using one of the video.encodings properties. However, FFMPEG is not able to decode the frames and this is driving me nuts.

    Edit 1 : The issues seems to be lack of SPS and PPS in the frames, and artificially inserting them have proven unsuccessful so far (all grey image). Blackberry 9700 sends

    0x00 0x00 0x ?? 0x ?? 0xType

    where Type is according to table 7-1 in the H264 spec (I and P frames). We believe the 0x ?? 0x ?? represent the size of the frame, however the size does not always correspond to the size found by the parser (the parser seems to be working correctly).

    I have a windows decoder codec from blackberry, called mc_demux_mp2_ds.ax, and can play some MPEG-4 files captured the same way, but it is a binary for windows. And the H264 files will not play either way. I am aware of previous attempts. The capture url for javax.microedition.media.Manager is

    encoding=video-3gpp_width=176_height=144_video_codec=H264_audio_codec=AAC

    and I am writing to an output stream. Some example files here.

    Edit 2 :Turns out that about 3-4 of the 12-15 available video capture modes are flat out failing and refusing to output data, even in the simplest of test applications. So any working solution should implement MPEG-4, H264 and H263 in both AMR and AAC, in so getting fallback alternatives when one sound codec and/or resolution fails. Reboots, hangs and what not litters the Blackberry video implementation and vary from firmware to firmware ; total suckage.

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