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Autres articles (35)

  • Publier sur MédiaSpip

    13 juin 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

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (6889)

  • Make sound settings created by ffmpeg apply to entire Windows applications [closed]

    7 septembre 2023, par rabeh koo

    The recording sound of my microphone is weak, so I resorted to using ffmpeg to add a volume increase effect and some other effects. I created a simple batch file and recorded the sound with it, and it works very well.
This is the batch file code :

    


    ffmpeg -f dshow -i audio="Microphone (USBAudio2.0)" -channels 1 -af " stereotools=level_in=2 , afftdn=nf=-25 , volume=10 " Output.wav


    


      

    • But the problem occurs when I want to make calls or use the microphone in Windows applications, the recording is very weak. Is there a way to make the ffmpeg effects that are in the batch file apply to all system applications, and how can that be done ?

      • 


    


    I searched and found that I have to create a virtual microphone device with some programs and make it the main microphone for the system. I tried these programs, but there was no option to add ffmpeg codes or pass the audio through the batch file that I created earlier.

    


  • FFmpeg synthesizes multiple videos, the final result is only sound, no picture display

    6 juillet 2023, par Halifax

    1、I first converted mp4 to ts：

    


    -i MyVideo.mp4 -vcodec copy -acodec aac -b:v 10000k MyVideo.ts


    


    2、Then scale the ts and fill the empty space：

    


    -i MyVideo.ts -vf pad=width=iw:height=ih:x=-1:y=0:color='White' -b:v 10000k MyVideo_transform.ts


    


    3、Finally use concat to merge into mp4 files：

    


    -i "concat:MyVideo_transform1.ts|MyVideo_transform2.ts" -acodec copy -vcodec copy -absf aac_adtstoasc -b:v 10000k $outputFilePath"


    


    Finally use concat to merge into mp4 files。

    


    I hope that the final merged result can see the video picture。

    


  • fftools/sync_queue : make sure non-limiting streams are not used as queue head

    23 mai 2023, par Anton Khirnov
    fftools/sync_queue : make sure non-limiting streams are not used as queue head

    A non-limiting stream could mistakenly end up being the queue head,
    
which would then produce incorrect synchronization, seen e.g. in
    
fate-matroska-flac-extradata-update for certain number of frame threads
    
(e.g. 5).
    

    Found-By : James Almer
    • [DH] fftools/sync_queue.c

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