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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Contribute to documentation

    13 avril 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 (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

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  • dts to m4a (aac) ffmpeg to qaac output issue

    10 avril 2014, par user8979

    Looking to encode 2 dts 5.1 audio sources (Sonic Landscape and The Digital Experience) to m4a (aac) 5.1 with qaac 2.35. Input piped to qaac using :

    ffmpeg -report -loglevel verbose -i "input.file" -vn -f wav -codec:a pcm_f32le - | qaac --cvbr 160 --quality 2 --rate=keep --ignorelength --no-delay - -o "output.m4a"

    • Sonic Landscape duration : 18.848s, qaac output duration : 18.859s

      • output .m4a duration mismatch
      • mediainfo reports output is 2ch while mediatab and ffmpeg report output is 5.1ch (lfe)

    • The Digital Experience duration : 32.875s, qaac output duration : 32.875s

      • mediainfo reports output is 2ch while mediatab and ffmpeg report output is 5.1ch (lfe)

    1. what caused the duration mismatch in the first one ? how can it be fixed ?
    2. is the output 2ch or 5.1ch ?
      • if it is 2ch, what qaac option(s) leave the channels in output same as input ?
      • if the output is 5.1ch, does qaac then always preserve channels unless explicitly told otherwise ?

  • Combining two FFMPEG filters into single command

    31 mai 2022, par shawn

    I would like to combine two filters and commands to a single ffmpeg command. What I want to achieve is overlay a static image on the video and draw a 90 degree rotated text as well.

    


    Can anyone help with this ?

    


    ffmpeg -y -i input.mp4 -i line.png -filter_complex "[0:v][1:v] overlay=105:625" -c:a copy output_video.mp4


    


    ffmpeg -y -i input.mp4 -i line.png -filter_complex "color=black:100x100[c];[c][0]scale2ref[ct][mv];[ct]setsar=1,split=2[t1][t2];


[t1]drawtext=fontfile=/Library/Fonts/GenerisSansW01Heavy.ttf:
text=$TITLE:line_spacing=10:fontsize=23:fontcolor=white,split[text1][alpha1];
[text1][alpha1]alphamerge,rotate=270*PI/180:ow=rotw(270*PI/180):oh=roth(270*PI/180):c=black@0[txta1]; 

[t2]drawtext=fontfile=/Library/Fonts/GenerisSansW01Heavy.ttf:
text=$CONTENTS:line_spacing=0.5:fontsize=18:fontcolor=white,split[text2][alpha2];
[text2][alpha2]alphamerge,rotate=270*PI/180:ow=rotw(270*PI/180):oh=roth(270*PI/180):c=black@0[txta2]; 


[mv][txta1]overlay=x='min(0,-H*sin(270*PI/180))+40':y='min(0,W*sin(270*PI/180))+751':shortest=1[mv1]; 
[mv1][txta2]overlay=x='min(0,-H*sin(270*PI/180))+138':y='min(0,W*sin(270*PI/180))+752':shortest=1" -c:a copy output_video.mp4


    


  • Extract part of a video using ffmpeg_extract_subclip - get a clip longer than expected

    4 juin 2020, par rightly0716

    I'm trying to extract a part of a video and find the solution on this page very helpful : 
Extract part of a video using ffmpeg_extract_subclip - black frames

    



    The function write_videofile helps get what I need exactly but a bit slow. The ffmpeg_extract_subclip function is indeed very fast, but somehow generates a weird clip that is slightly longer than what I need. For example, if I use the cmd below (no matter with or without -copyinkf),

    



    ffmpeg -y -ss 218.00 -i input.mp4 -t 7.00 -vcodec copy -acodec copy output.mp4


    



    My output.mp4 will be 9 second long, with the last two seconds frozen with no audio. Anyone saw a similar issue before ? Thanks a lot !

    


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