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Autres articles (105)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • 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.

  • 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 ;

Sur d’autres sites (18399)

  • How do I reliably find the frame count of a video in less than a few seconds ?

    2 août 2022, par nmkd

    I need a fast and reliable way to get the total frame count of a video.

    


    Here are the following methods that I have tried and their flaws :

    


      


    1. ffprobe (fast way)

      


      ffprobe -select_streams v:0 -show_entries stream=nb_frames -of default=noprint_wrappers=1 input.mp4

      


      2. 


    


    Problem : Often returns N/A, not reliable.

    


      


    1. ffprobe (slow way)

      


      ffprobe -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 input.mp4

      


      2. 


    


    Problem : Pretty slow, can take a minute for longer videos.

    


      


    1. ffmpeg (fast way)

      


      ffmpeg -i input.mp4 -map 0:v:0 -c copy -f null -

      


      2. 


    


    Problem : Needs to fully decode video once, which is rather slow

    


    I know that what I'm looking for is possible because certain software (like Topaz Video Enhance) can do it. But I don't know how I can achieve this in my C# project or ffmpeg.

    


  • Showfreqs and showwaves over background image ?

    11 octobre 2017, par Jeremy

    I’m wanting to get FFMPEG to export my podcast audio to a file I can upload to youtube that is visually interesting.

    currently I am using the following piece of code, which I don’t fully grasp :

    ffmpeg -i E04_ProphetsPrey.wav -filter_complex \
    
"    [0:a]showfreqs=mode=line:ascale=log:fscale=rlog:s=1280x518,pad=1280:720[vs]; \
    
 [0:a]showfreqs=mode=line:ascale=log:fscale=rlog:s=1x1[ss]; \
    
 [0:a]showwaves=s=1280x202:mode=p2p[sw]; \
    
 [vs][ss]overlay=w[bg]; \
    
 [bg][sw]overlay=0:H-h,drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf:fontcolor=white:x=10:y=10:text='\"Rated80s Prophets Prey\" by Comics On Film'[out]" \
    
-map "[out]" -map 0:a -c:v libx264 -preset fast -crf 18 -c:a copy -threads 0 output.mkv

    what I would like to do is set a (branded) background image, and have showfreqs render over it on the top half and showwaves render over it on the bottom half.

    Is that possible, and if so could you provide me a detailed example ?

    (I’m on arch linux)

  • Convert TIFF images sequence to lossless movie FFMPEG

    9 janvier 2016, par Rarez

    I would like use a h265 codec(FPS must be equal to 25) to save loseless wideo from sequence of TIFF images. I have a problem with save it. I supose that it is little mistake. I tried many combinactions of commands here is last one :

    ffmpeg -f image2 -r $FRAMERATE -i IMG_%03d.tif -vcodec libx265 -x265-params lossless movie.mp4

    And output :

    [libx265 @ 0x2bcaf40] 4:2:2 and 4:4:4 support is not fully defined for HEVC yet. Set -strict experimental to encode anyway.
    
Output #0, mp4, to 'movie.mp4':
    
    Stream #0:0: Video: hevc, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 25 fps
    
    Metadata:
    
      encoder         : Lavc57.20.100 libx265
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (tiff (native) -> hevc (libx265))
    
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    I will be very glad for any help. Thanks

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