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  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

  • Menus personnalisés

    14 novembre 2010, par

    MediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
    Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
    Menus créés à l’initialisation du site
    Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...)

  • Déploiements possibles

    31 janvier 2010, par

    Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
    L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
    Version mono serveur
    La version mono serveur consiste à n’utiliser qu’une (...)

Sur d’autres sites (12368)

  • aacenc : Add support for Perceptual Noise Substitution energy values

    12 avril 2015, par Rostislav Pehlivanov
    aacenc : Add support for Perceptual Noise Substitution energy values

    This commit implements support for writing the noise energy values used in PNS.
    
The difference between regular scalefactors and noise energy values is that the latter
    
require a small preamble (NOISE_PRE + energy_value_diff) to be written as the first
    
noise-containing band. Any following noise energy values use the previous one to
    
base their "diff" on. Ordinary scalefactors remain unchanged other than that they ignore the noise values.
    

    This commit should not change anything by itself, the following commits will bring it in use.
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/aac.h
    • [DH] libavcodec/aacenc.c

  • Gstreamer AAC encoding no more supported ?

    22 juillet 2016, par Gianks

    i’d like to include AAC as one of the compatible formats in my app but i’m having troubles with its encoding.
    FAAC seems to be missing in GStreamer-1.0 Debian-derived packages (see Ubuntu) and the main reason for that (if i got it correctly) is the presence of avenc_aac (Lunchpad bugreport) as a replacement.

    I’ve tried the following :

    gst-launch-1.0 filesrc location="src.avi" ! tee name=t  t.! queue ! decodebin ! progressreport ! x264enc ! mux. t.! queue ! decodebin ! audioconvert ! audioresample ! avenc_aac compliance=-2 ! mux. avmux_mpegts name=mux ! filesink location=/tmp/test.avi

    It hangs prerolling with :

    ERROR libav :0:: AAC bitstream not in ADTS format and extradata missing

    Using mpegtsmux instead of avmux_mpegts seems to work since the file is created but it results with no working audio (with some players it’s completely unplayable).

    This is the trace of mplayer :

    Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
    
[aac @ 0x7f2860d6c3c0]channel element 3.15 is not allocated
    
[aac @ 0x7f2860d6c3c0]Sample rate index in program config element does not match the sample rate index configured by the container.
    
[aac @ 0x7f2860d6c3c0]Inconsistent channel configuration.
    
[aac @ 0x7f2860d6c3c0]get_buffer() failed
    
[aac @ 0x7f2860d6c3c0]Assuming an incorrectly encoded 7.1 channel layout instead of a spec-compliant 7.1(wide) layout, use -strict 1 to decode according to the specification instead.
    
[aac @ 0x7f2860d6c3c0]Reserved bit set.
    
[aac @ 0x7f2860d6c3c0]Number of bands (20) exceeds limit (14).
    
[aac @ 0x7f2860d6c3c0]invalid band type
    
[aac @ 0x7f2860d6c3c0]More than one AAC RDB per ADTS frame is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
    
[aac @ 0x7f2860d6c3c0]Reserved bit set.
    
[aac @ 0x7f2860d6c3c0]Number of bands (45) exceeds limit (28).
    
Unknown/missing audio format -> no sound
    
ADecoder init failed :(
    
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
    
FAAD: compressed input bitrate missing, assuming 128kbit/s!
    
AUDIO: 44100 Hz, 2 ch, floatle, 128.0 kbit/9.07% (ratio: 16000->176400)
    
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio))
    
==========================================================================
    
AO: [pulse] 44100Hz 2ch floatle (4 bytes per sample)
    
Starting playback...
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Channel coupling not yet implemented, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: Failed to decode frame: Bitstream value not allowed by specification 
    
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
    
VO: [vdpau] 640x480 => 640x480 Planar YV12 
    
A:3602.2 V:3600.0 A-V:  2.143 ct:  0.000   3/  3 ??% ??% ??,?% 0 0 
    
FAAD: error: Array index out of range, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Unexpected fill element with SBR data, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Bitstream value not allowed by specification, trying to resync!
    
FAAD: error: Channel coupling not yet implemented, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: error: PCE shall be the first element in a frame, trying to resync!
    
FAAD: error: Invalid number of channels, trying to resync!
    
FAAD: Failed to decode frame: Invalid number of channels 
    
A:3602.2 V:3600.1 A-V:  2.063 ct:  0.000   4/  4 ??% ??% ??,?% 0 0

    These the messages produced by VLC (10 seconds of playback) :

    ts info: MPEG-4 descriptor not found for pid 0x42 type 0xf
    
core error: option sub-original-fps does not exist
    
subtitle warning: failed to recognize subtitle type
    
core error: no suitable demux module for `file/subtitle:///tmp//test.avi.idx'
    
avcodec info: Using NVIDIA VDPAU Driver Shared Library 361.42 Tue Mar 22 17:29:16 PDT 2016 for hardware decoding.
    
core warning: VoutDisplayEvent 'pictures invalid'
    
core warning: VoutDisplayEvent 'pictures invalid'
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio warning: ADTS CRC not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: ADTS CRC not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio warning: Invalid ADTS header
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported
    
packetizer_mpeg4audio error: Multiple blocks per frame in ADTS not supported

    Using the error of the hanging pipeline I’ve finally discovered that avenc_aac should be told in such way to output the data NOT in RAW AAC but in ADTS AAC, the point is that i’ve no idea how to do that with Gstreamer. See here, bottom of the page : FFMPEG Ticket

    At this point since i’ve found no documentation seems right to say we have no support for AAC encoding in GStreamer... which isn’t true, i guess ! (IMHO anyway seems strange the missing of FAAC if AVENC_AAC requires all the time to be set in experimental mode)

    Can someone propose a working pipeline for this ?

    UPDATE

    After some more research i’ve found (via gst-inspect on avenc_aac) what i’m probably looking for but i don’t know how to setup it as needed.
    Have a look at stream-format :

    Pad Templates:
    
  SRC template: 'src'
    
    Availability: Always
    
    Capabilities:
    
      audio/mpeg
    
               channels: [ 1, 6 ]
    
                   rate: [ 4000, 96000 ]
    
            mpegversion: 4
    
          stream-format: raw
    
        base-profile: lc

    Thanks

  • h264 : do not return an error when NAL parsing of extradata failed

    7 mai 2016, par Hendrik Leppkes
    h264 : do not return an error when NAL parsing of extradata failed

    Fixes AnnexB samples with broken extradata, but proper in-band parameter sets
    

    Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
    • [DH] libavcodec/h264.c

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