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Autres articles (41)

  • 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 (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (11859)

  • Create and combine a blank video stream with a subtitle steam

    10 décembre 2014, par CPO

    I have a live .ts stream that contains a video stream, audio stream and subtitle stream. What I want to do is to display the video in full, eg video and audio and subtitles, but in parallel take the same stream and ’blank’ the video to black, but allow the subtitle stream to be rendered into that video stream for display separately from the fully displayed streams. The reason for this is to allow the subtitles to be displayed separately and cropped,from a second projector, but to have a black backgroung to avoid distractions when there is no subtitle present. I believe this can be achieved using FFMPEG but my limited experience with this utility rather limits my progress. I believe that the blanked video stream needs to be the same frame rate and resolution as the original in order that the rendered subtitles stay in synch with the original video stream. Any help or suggestions warmly welcomed. Thank you

  • Audio/Video drop when merging 3 FFmpeg commands which includes scale, pad, filter complex

    21 novembre 2018, par Mayank

    I am trying to scale 2 videos to h=240 resolution keeping the same aspect ration. Then I am merging the audio and video of these 2 videos to form a single mp4 file. I have 3 commands in total and the final result is good.

    However, I want to combine these 3 commands and get the same result in one single command. Can someone please help me in combing these commands ? Thanks in advance.

    First Command :

    ffmpeg -i 01_v.mp4 -vf "[0]scale=-1:240[scaled_240]; [scaled_240]pad=width=320:height=240:x=(320-in_w)/2:y=(240-in_h)/2:color=black" -preset ultrafast -y -r pal "1_v.mp4"

    Second Command :

    ffmpeg -i 02_v.mp4 -vf "[0]scale=-1:240[scaled_240]; [scaled_240]pad=width=320:height=240:x=(320-in_w)/2:y=(240-in_h)/2:color=black" -preset ultrafast -y -r pal "2_v.mp4"

    Third Command :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024181 -i 1_v.mp4 -itsoffset 0.113192 -i 2_v.mp4 -filter_complex "[1:a]adelay=15726.168|15726.168[a1]; [0:a][a1]amix; [3:v]trim=0:15.726168,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v]fifo[2v]; [2v][3_v_silence]hstack[out_v]; [out_v]pad=width=640:height=480:x=(640-in_w)/2:y=(480-in_h)/2:color=black" -crf 40 -preset ultrafast -y -r pal "out.mp4"

    I have tried to combine the above 3 commands and formed a single command. However, the result is not good with muted audio for few seconds in the middle of playback, also the 2nd video gets over few seconds earlier. Hence ending up in messing up the audio/video sync.

    This is my single command which doesn’t produce the desired result :

    ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024181 -i 01_v.webm -itsoffset 0.113192 -i 02_v.webm -filter_complex "[1:a]adelay=15726.168|15726.168[a1]; [0:a][a1]amix; [3:v]trim=0:15.726168,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v]scale=-1:240[2v_scaled_240]; [2v_scaled_240]pad=width=320:height=240:x=(320-in_w)/2:y=(240-in_h)/2:color=black[2v_padded]; [3_v_silence]scale=-1:240[3v_scaled_240]; [3v_scaled_240]pad=width=320:height=240:x=(320-in_w)/2:y=(240-in_h)/2:color=black[3v_padded]; [2v_padded]fifo[2v]; [2v][3v_padded]hstack[out_v]; [out_v]pad=width=640:height=480:x=(640-in_w)/2:y=(480-in_h)/2:color=black" -crf 40 -preset ultrafast -y -r pal out.mp4

  • FFMpeg - Freeze First Frame for X seconds

    13 mars 2021, par John Doe

    I need to pause/freeze the first frame of the video for 2 seconds before proceeding to the scroll effect. Here's what I have :

    


    ffmpeg -y -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -loop 1 -i "temp.jpg" -i "floating.png" -filter_complex "[1:v]fps=fps=30,crop=1280:720:0:'t*(ih-oh)/120',overlay,scale=1280x720,drawtext=fontfile='font.ttf':text='text here':x=20:y=675:fontsize=60:fontcolor=white:shadowcolor=black:shadowx=2:shadowy=2,drawtext=fontfile='font.ttf':text='more text':x=w-tw-20:y=670:fontsize=70:fontcolor=white:shadowcolor=black:shadowx=2:shadowy=2[out]" -t 10 -map "[out]" -map "0:a" -shortest -c:v h264_qsv -c:a aac -ac 2 -ar 44100 -vb 30M -r 30 "video.mp4"


    


    Any ideas ?

    


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