Recherche avancée

Médias (21)

Mot : - Tags -/Nine Inch Nails

Autres articles (103)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (12738)

  • ffmpeg volumedetect returns unstable result

    8 février 2018, par Eric Stdlib

    I am using ffmpeg to calculate the volume of my audio file, but I find that ffmpeg returns different values for different containers (like mp3 v.s. ogg)

    Here is an example. I am using an ogg file from Wikimedia Commons, and converting it to mp3, then analyze the volume of both files. For ogg file, I get -3.0 dB for mean volume, but for mp3 file, I get -3.4 dB. When I use other files, I also get different max volume and histogram.

    [user@localhost tmp]$ wget https://upload.wikimedia.org/wikipedia/commons/b/b9/Audio_Frequency_tone%2C_Middle_C%2C_C4%2C_261.63hz.ogg -O a.ogg 2> /dev/null
    
[user@localhost tmp]$ ffmpeg -i a.ogg a.mp3 2> /dev/null
    
[user@localhost tmp]$ ffmpeg -i a.ogg -af volumedetect tmp.ogg 2>&1 | grep volumedetect
    
[Parsed_volumedetect_0 @ 0x555f69f3f4a0] n_samples: 88768
    
[Parsed_volumedetect_0 @ 0x555f69f3f4a0] mean_volume: -3.0 dB
    
[Parsed_volumedetect_0 @ 0x555f69f3f4a0] max_volume: 0.0 dB
    
[Parsed_volumedetect_0 @ 0x555f69f3f4a0] histogram_0db: 27541
    
[user@localhost tmp]$ ffmpeg -i a.mp3 -af volumedetect tmp.mp3 2>&1 | grep volumedetect
    
[Parsed_volumedetect_0 @ 0x55fd62be4740] n_samples: 88768
    
[Parsed_volumedetect_0 @ 0x55fd62be4740] mean_volume: -3.4 dB
    
[Parsed_volumedetect_0 @ 0x55fd62be4740] max_volume: -0.0 dB
    
[Parsed_volumedetect_0 @ 0x55fd62be4740] histogram_0db: 21340
    
[user@localhost tmp]$

    Why is this bug happening ? Which one should I believe ?

  • aarch64 : vp9 : use alternative returns in the core loop filter function

    9 janvier 2017, par Janne Grunau
    aarch64 : vp9 : use alternative returns in the core loop filter function

    Since aarch64 has enough free general purpose registers use them to
    
branch to the appropiate storage code. 1-2 cycles faster for the
    
functions using loop_filter 8/16, ... on a cortex-a53. Mixed results
    
(up to 2 cycles faster/slower) on a cortex-a57.
    

    This is cherrypicked from libav commit
    
d7595de0b25e7064fd9e06dea5d0425536cef6dc.
    

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/aarch64/vp9lpf_neon.S

  • avfilter/vf_framerate : do not calculate scene change score multiple times for the...

    10 décembre 2017, par Marton Balint
    avfilter/vf_framerate : do not calculate scene change score multiple times for the same frame

    This speeds up the filter, and also fixes scene change detection score which is
    
reduced based on the difference of the current MAFD to the preivous MAFD.
    
Obviously if we compare two frames twice, the difference will be 0...
    

    Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavfilter/vf_framerate.c

Navigation