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Autres articles (58)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (8927)

  • hevc_nvenc HQ settings collection

    28 décembre 2017, par Luca Malavasi

    I would like to collect the reasonably best HQ settings related to codec "hevc_nvenc" for FFmpeg application.
    I saw that for 10xx series it should take from 15 min to 30 minutes for a Blu-Ray processing,
    so it would not a big deal try to implement best settings possible (AKA Quality vs disk size).

    Here are my test-sample experience, considering that unluckily this codec doesn’t support -crf option

    -1-SD-h264=
    ffmpeg -i input -gpu 0 -vcodec hevc_nvenc -aspect 16:9 -strict -2 -b:v 2000k -minrate 2000k -maxrate 2000k -tier high -profile:2 -preset:llhq -2pass 1 -acodec copy output

    -2-HD-h264=
    ffmpeg -i input -gpu 0 -vcodec -b:v 9000k -minrate 9000k -maxrate 9000k -tier high -profile:2 -preset:llhq -2pass 1 -acodec copy output

    -3-HD-h265=
    ffmpeg -i input -vcodec hevc_nvenc -b:v 5000k -minrate 5000k -maxrate 5000k -tier high -profile:2 -preset:llhq -2pass 1 -acodec copy output

    Is anybody suggesting some more improving setting for 1,2,3 options ?
    Thanks to all contributors.
    Cheers
    Luca

  • How to let ffmpeg encode image to h264 video in realtime using h264_videotoolbox encoder

    2 novembre 2020, par SolskGaer

    I am using h264_videotoolbox encoder to encode an image stream to h264 video, but the generated video is about one second slower than the input, the command I am using is ffmpeg -f mjpeg -r 20 -i pipe:0 -vf scale=600:-2 -vcodec h264_videotoolbox -realtime true -profile:v baseline -b:v 3000k -r 20 -f h264 - , the input and output is handled by my golang program. I also tried libx264 to do the same thing, under -tune zerolatency -profile:v baseline settings I can get exactually what I want, I think with gpu acceleration, the encoding speed should be faster, what did I do wrong ?

    


  • use ffmpeg to set start_time equal in audio and video elementary streams

    13 août 2018, par sajad

    I am using ffmpeg tool for offline transcoding of some input files to MPEG-TS format. I use ffprobe to analyze the output. I need the output video to have equal values for start_time for both video and audio elementary streams. This is necessary for streaming by Perception streamer server. My desired output is like this :

    <streams>        
    
    <stream index="0"></stream>..../ codec_type="video" /.../ start_pts="YYY" start_time="XXX" /..../
    
        
    
        <stream index="1"></stream>..../ codec_type="audio" /.../ start_pts="YYY" start_time="XXX" /..../
    
        
    
    </streams>

    I use this profile for transcoding :

    -ss 0 -y -vcodec libx264 -vb 3404k -acodec libfdk_aac -profile:a aac_he -strict experimental -ar 48k -f adts -ab 96k -r 25 -g 50 -force_key_frames 'expr:gte(t,n_forced*2)' -x264-params keyint=50:min-keyint=50:scenecut=-1:force-cfr=1:nal-hrd=cbr -vsync 1 -async 1 -profile:v main -level 4.0 -s 1920x1080 -aspect 16:9 -avoid_negative_ts make_zero -strict experimental -muxdelay 0 -muxpreload 0 -output_ts_offset 0 -initial_offset 0 -start_at_zero -bufsize 3500K -minrate 3500K -maxrate 3500K -f mpegts

    How can I set start_time and start_pts like I explained ?

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