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  • Organiser par catégorie

    17 mai 2013, par

    Dans MédiaSPIP, une rubrique a 2 noms : catégorie et rubrique.
    Les différents documents stockés dans MédiaSPIP peuvent être rangés dans différentes catégories. On peut créer une catégorie en cliquant sur "publier une catégorie" dans le menu publier en haut à droite ( après authentification ). Une catégorie peut être rangée dans une autre catégorie aussi ce qui fait qu’on peut construire une arborescence de catégories.
    Lors de la publication prochaine d’un document, la nouvelle catégorie créée sera proposée (...)

  • Récupération d’informations sur le site maître à l’installation d’une instance

    26 novembre 2010, par

    Utilité
    Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
    Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

Sur d’autres sites (5153)

  • Sound in videos is full of static

    13 avril 2015, par banshee_walk_sly

    I’m trying to play sound from an FFMpegFrameGrabber by getting the Frame and sending the audio samples to a SourceDataLine. Here’s what I have so far :

    Creating the SourceDataLine :

    int channels = _grabber.getAudioChannels();
    
int format = _grabber.getSampleFormat();
    
AudioFormat fmt = new AudioFormat(_grabber.getSampleRate(), format, channels, true, true);
    
_sourceDataLine=(SourceDataLine)AudioSystem.getLine(new DataLine.Info(SourceDataLine.class, fmt));
    
_sourceDataLine.open(fmt);
    
_sourceDataLine.start();

    Attempting to play sound (images are handled in the else block) :

    org.bytedeco.javacv.Frame f = _grabber.grabFrame();
    

    
if (f.samples != null && f.samples.length > 0)
    
{
    
    byte[] bytes = new byte[4096];
    
    for (Buffer buffer : f.samples)
    
    {
    
        FloatBuffer floatBuffer = (FloatBuffer) buffer;
    
        ByteBuffer byteBuffer = ByteBuffer.allocate(floatBuffer.capacity() * 4);
    
        byteBuffer.asFloatBuffer().put(floatBuffer);
    
        byteBuffer.rewind();
    
        byteBuffer.get(bytes);
    
        _sourceDataLine.write(bytes, 0, bytes.length);
    
    }
    
}

    (Note : I tried a few different versions of this and they all have static. The versions I tried included combining the buffers into one large buffer, only trying to play one sample instead of each channel, and changing the audio format to many different permutations.)

    The problem is the sound is full of static, and almost completely unintelligible. This is my first time doing any audio programming, so I’m sure I’m doing something completely ridiculous.

    I appreciate any help. Thank you.

    EDIT

    In response to Radiodef, I tried a number of AudioFormats, and I couldn’t find one that worked for PCM_FLOAT. I found an example that used this :

    fmt = new AudioFormat(AudioFormat.Encoding.PCM_FLOAT, _grabber.getSampleRate(), format, channels, channels, _grabber.getSampleRate(), true);

    Note : I tried a few different values for the framesize from examples : channels * format / 8, channels * 8 with a hardcoded samplerate of 64, channels * 4 with a hardcoded samplerate of 32, and any combinations of those

    But it give me this exception :

    java.lang.IllegalArgumentException: No line matching interface SourceDataLine supporting format PCM_FLOAT 44100.0 Hz, 8 bit, stereo, 2 bytes/frame,  is supported.
    
    at javax.sound.sampled.AudioSystem.getLine(Unknown Source)
    
    at com.enplug.player.video.Video.<init>(Video.java:52) &lt;- where I get the SourceDataLine
    
    ...
    
</init>

    EDIT 2

    Sorry for the delay. I appreciate all the help Radiodef.

    Here is some output from the FFMpegGrabber that is automatically output.

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Shawn\AppData\Roaming\Enplug Display\Download\Resource\c7cb496d-96ea-4be8-a238-5ffd50955a3e.mp4':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 0
    
    compatible_brands: qt
    
    creation_time   : 2014-10-02 07:14:38
    
  Duration: 00:00:31.13, start: 0.000000, bitrate: 2412 kb/s
    
    Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 246 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-10-02 07:14:38
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 2157 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-10-02 07:14:38
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264

    I have two videos I’m testing with, and the first one (which is the one in the example above) has the following :

    Bit rate: 247 kbps
    
Channels: 2 (stereo)
    
Audio sample rate: 44 kHz

    And the second is :

    Bit rate: 161 kbps
    
Channels: 2 (stereo)
    
Audio sample rate: 48 kHz

    They’re both mp4s, and I can provide any details about the video itself if needed.

    As for the library, yeah I’m pretty locked into JavaCV. We already have videos running without sound, but we’re now trying to add sound to our program.

    When I run the sample program from your JSR link I get :

    PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian

  • Sound in videos is full of static

    15 octobre 2017, par Shawn Blakesley

    I’m trying to play sound from an FFMpegFrameGrabber by getting the Frame and sending the audio samples to a SourceDataLine. Here’s what I have so far :

    Creating the SourceDataLine :

    int channels = _grabber.getAudioChannels();
    
int format = _grabber.getSampleFormat();
    
AudioFormat fmt = new AudioFormat(_grabber.getSampleRate(), format, channels, true, true);
    
_sourceDataLine=(SourceDataLine)AudioSystem.getLine(new DataLine.Info(SourceDataLine.class, fmt));
    
_sourceDataLine.open(fmt);
    
_sourceDataLine.start();

    Attempting to play sound (images are handled in the else block) :

    org.bytedeco.javacv.Frame f = _grabber.grabFrame();
    

    
if (f.samples != null &amp;&amp; f.samples.length > 0)
    
{
    
    byte[] bytes = new byte[4096];
    
    for (Buffer buffer : f.samples)
    
    {
    
        FloatBuffer floatBuffer = (FloatBuffer) buffer;
    
        ByteBuffer byteBuffer = ByteBuffer.allocate(floatBuffer.capacity() * 4);
    
        byteBuffer.asFloatBuffer().put(floatBuffer);
    
        byteBuffer.rewind();
    
        byteBuffer.get(bytes);
    
        _sourceDataLine.write(bytes, 0, bytes.length);
    
    }
    
}

    (Note : I tried a few different versions of this and they all have static. The versions I tried included combining the buffers into one large buffer, only trying to play one sample instead of each channel, and changing the audio format to many different permutations.)

    The problem is the sound is full of static, and almost completely unintelligible. This is my first time doing any audio programming, so I’m sure I’m doing something completely ridiculous.

    I appreciate any help. Thank you.

    EDIT

    In response to Radiodef, I tried a number of AudioFormats, and I couldn’t find one that worked for PCM_FLOAT. I found an example that used this :

    fmt = new AudioFormat(AudioFormat.Encoding.PCM_FLOAT, _grabber.getSampleRate(), format, channels, channels, _grabber.getSampleRate(), true);

    Note : I tried a few different values for the framesize from examples : channels * format / 8, channels * 8 with a hardcoded samplerate of 64, channels * 4 with a hardcoded samplerate of 32, and any combinations of those

    But it give me this exception :

    java.lang.IllegalArgumentException: No line matching interface SourceDataLine supporting format PCM_FLOAT 44100.0 Hz, 8 bit, stereo, 2 bytes/frame,  is supported.
    
    at javax.sound.sampled.AudioSystem.getLine(Unknown Source)
    
    at com.enplug.player.video.Video.<init>(Video.java:52) &lt;- where I get the SourceDataLine
    
    ...
    
</init>

    EDIT 2

    Sorry for the delay. I appreciate all the help Radiodef.

    Here is some output from the FFMpegGrabber that is automatically output.

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Shawn\AppData\Roaming\Enplug Display\Download\Resource\c7cb496d-96ea-4be8-a238-5ffd50955a3e.mp4':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 0
    
    compatible_brands: qt
    
    creation_time   : 2014-10-02 07:14:38
    
  Duration: 00:00:31.13, start: 0.000000, bitrate: 2412 kb/s
    
    Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 246 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-10-02 07:14:38
    
      handler_name    : Core Media Data Handler
    
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720, 2157 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      creation_time   : 2014-10-02 07:14:38
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264

    I have two videos I’m testing with, and the first one (which is the one in the example above) has the following :

    Bit rate: 247 kbps
    
Channels: 2 (stereo)
    
Audio sample rate: 44 kHz

    And the second is :

    Bit rate: 161 kbps
    
Channels: 2 (stereo)
    
Audio sample rate: 48 kHz

    They’re both mp4s, and I can provide any details about the video itself if needed.

    As for the library, yeah I’m pretty locked into JavaCV. We already have videos running without sound, but we’re now trying to add sound to our program.

    When I run the sample program from your JSR link I get :

    PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, mono, 1 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, mono, 2 bytes/frame, big-endian
    
PCM_UNSIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 8 bit, stereo, 2 bytes/frame,
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, little-endian
    
PCM_SIGNED unknown sample rate, 16 bit, stereo, 4 bytes/frame, big-endian

  • How to play sound from G.711 raw data file [on hold]

    19 mai 2014, par vdm

    I have raw data file with G.711 MULAW audio frames withoud any headers. All additional info i know :

    FormatTag: 0x0007
    
Channels: 2
    
SamplesPerSec: 8000
    
BitPerSample: 8
    
BlockAlign: 1
    
AvgBytesPerSec: 8000

    How i can play the file ?

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