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Autres articles (74)

  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
    Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)

Sur d’autres sites (13522)

  • ffmpeg from .mp3 to .al appears to slow and deepen the audio

    6 juillet 2020, par Darpeh

    I have an mp3 input file that is 22050Hz and 48kb/s. I need to convert it to a .al file in order to stream it to a camera on my network for output.

    


    ffmpeg -i file.mp3 file.al 


    


    creates a file that does play but the bitrate of the output is 176kb/s and it clearly slower/deeper sounding. I have tried -b:a 48k and -filter:a without success but I could be doing it wrong.

    


    Documentation states that this is the format I need : PCM ADPCM G.711A G.711.Mu G.726 G.729 MPEG2 AMR AAC

    


  • Live Video Encoding and Streaming on a Webpage

    15 juin 2018, par Ockhius

    I am trying to show live webcam video stream on webpage and I have a working draft. However, I am not satisfied with the performance and looking for a better way to do the job.

    I have a webcam connected to Raspberry PI and a web server which is a simple python-Flask server. Webcam images are captured by using OpenCV and formatted as JPEG. Later, those JPEGs are sent to one of the server’s UDP ports. What I did up to this point is something like a homemade MJPEG(motion-jpeg) streaming.

    At the server-side I have a simple python script that continuously reads UDP port and put JPEG image in the HTML5 canvas. That is fast enough to create a perception of a live stream.

    Problems :

    • This compress the video very little. Actually it does not compress the video. It only decreases the size of a frame by formatting as JPEG.

    • FPS is low and also quality of the stream is not that good.

    • It is not a major point for now but UDP is not a secure way to stream video.

    • Server is busy with image picking from UDP. Needs threaded server design.

    Alternatives :

    • I have used FFMPEG before to convert video formats and also stream pre-recorded video. I guess, it is possible to encode(let say H.264) and stream WebCam live video using ffmpeg or avconv. (Encoding)

    Is this applicable on Raspberry PI ?

    • VLC is able to play live videos streamed on network. (Stream)

    Is there any Media Player to embed on HTML/Javascript to handle
    network stream like the VLC does ?

    • I have read about HLS (HTTP Live Stream) and MPEG-DASH.

    Does these apply for this case ? If it does,how should I use them ?

    Is there any other way to show live stream on webpage ?

    • RTSP is a secure protocol.

    What is the best practice for transport layer protocol in video
    streaming ?

  • Live Video Encoding and Streaming on a Webpage

    9 mars 2016, par Ockhius

    I am trying to show live webcam video stream on webpage and I have a working draft. However, I am not satisfied with the performance and looking for a better way to do the job.

    I have a webcam connected to Raspberry PI and a web server which is a simple python-Flask server. Webcam images are captured by using OpenCV and formatted as JPEG. Later, those JPEGs are sent to one of the server’s UDP ports. What I did up to this point is something like a homemade MJPEG(motion-jpeg) streaming.

    At the server-side I have a simple python script that continuously reads UDP port and put JPEG image in the HTML5 canvas. That is fast enough to create a perception of a live stream.

    Problems :

    • This compress the video very little. Actually it does not compress the video. It only decreases the size of a frame by formatting as JPEG.

    • FPS is low and also quality of the stream is not that good.

    • It is not a major point for now but UDP is not a secure way to stream video.

    • Server is busy with image picking from UDP. Needs threaded server design.

    Alternatives :

    • I have used FFMPEG before to convert video formats and also stream pre-recorded video. I guess, it is possible to encode(let say H.264) and stream WebCam live video using ffmpeg or avconv. (Encoding)

    Is this applicable on Raspberry PI ?

    • VLC is able to play live videos streamed on network. (Stream)

    Is there any Media Player to embed on HTML/Javascript to handle
    network stream like the VLC does ?

    • I have read about HLS (HTTP Live Stream) and MPEG-DASH.

    Does these apply for this case ? If it does,how should I use them ?

    Is there any other way to show live stream on webpage ?

    • RTSP is a secure protocol.

    What is the best practice for transport layer protocol in video
    streaming ?

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