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  • Publier sur MédiaSpip

    13 June 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

  • Contribute to documentation

    13 April 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including: critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Submit bugs and patches

    13 April 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information: the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

On other websites (13342)

  • ffmpeg "Stream maping" taking a long time to load

    29 August 2022, by Bambi2k21

    I am using ffmpeg to speed up and slow down parts where the talker is talking and being silent.
To do this I run something like this(the code below[more exactly the filter part, the rest is the same] is an example, not my exact code):
    cmd /c ffmpeg -i Soon.mp4 -filter_complex "[0:v]trim=0:2,setpts=PTS-STARTPTS[v1];[0:v]trim=2:5,setpts=2*(PTS-STARTPTS)[v2];[0:v]trim=5:6,setpts=PTS-STARTPTS[v3];[0:a]atrim=0:2,asetpts=PTS-STARTPTS[a1];[0:a]atrim=2:5,asetpts=PTS-STARTPTS,atempo=0.5[a2];[0:a]atrim=5:6,asetpts=PTS-STARTPTS[a3];[v1][a1][v2][a2][v3][a3]concat=n=3:v=1:a=1" -vcodec libx264 -crf 10 -preset ultrafast -profile:v baseline -shortest -tune:v stillimage -pix_fmt yuv420p -colorspace:v "bt709" -color_primaries:v "bt709" -color_trc:v "bt709" -color_range:v "tv" output.mp4
    I added some optimisations to make it faster and they do work, but the amount of time needed for "Stream mapping" does not change. My problem with it is not the amount of time it takes but the fact that it gets progressively slower as each iterations of codes like this are run. At start it takes 20 secs but towards the end it takes close to a minute, I thought maybe it gets cluttered so I added "cmd /c" to pretty much restart the console, but no change. How do I change this?

    
How stream mapping looks in one of the iterations.

    


    Stream mapping:
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:0 (h264) -> trim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  Stream #0:1 (aac) -> atrim:default
  concat -> Stream #0:0 (libx264)
  concat -> Stream #0:1 (aac)
Press [q] to stop, [?] for help```


    


  • Problems using Cuda for video transcoding [closed]

    19 August 2022, by Jay Adlard

    I just bought a new pc as my faithful old windows 7 i7 laptop died. Now the laptop had both intel and nvidea gtx660m chips. When I transcoded video with handbrake the intel graphics managed 8fps when I changed over to the nvidia it managed 80fps and the graphics card got nice and hot so was obviously working.

    


    The new machine i bought is a i9 with an nvidea gtx780 running windows 10. When I tried to transcode some video hoping for it to use the cpu and Gpu but no joy,the card stays cool power usage is only a handful of watts higher than it running something simple.I had been using handbrake but I read it doesn’t support Cuda so why the laptop speeded up I don’t know. A friend of mine that is into ffmpeg came round found that ffmpeg reports no Cuda yet the card works fine in every other respect. Unlike the rest of the machine the graphics card wasn’t new but it looked like new…

    


    One thing to note I am not talking about nvenc as the quality is rather poor, no point in capturing uncompressed files cleaning them up and not using an encoder that will do 2 pass and an exhaustive search.
Can anyone recommend a reasonably priced encoder that will use the Cuda cores?

    


    Has anyone got any idea what the problem is?

    


  • ffmpeg Node Screen recording does not have audio

    8 April 2024, by user2500558

    I am building a screen recording application using fluent-ffmpeg.

    


    let command = ffmpeg({ source: '1:0' })
command.inputFormat('avfoundation')
command.fps(60)
command.videoCodec('libx264')
command.audioBitrate('320k')
command.audioCodec('libmp3lame')
command.addOption('-pix_fmt', 'yuv420p')
command.save('output.mp4')


    


    I am able to record the screen, but the audio of the screen is not being recorded. For example: When I play a YouTube clip and record my screen, the video will be there but the audio from the YouTube clip not.

    


    Am I missing an option in ffmpeg? I cant get the screen audio (I am not talking about a microphone).

    


    Edit: I want to use ffmpeg instead of Electrons desktopCapture as ffmpeg has more options and is more powerful.

    


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