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  • 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.
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Sur d’autres sites (9247)

  • ffmpeg create 2 videos from images with a consistent (exact same) duration

    3 septembre 2021, par danday74

    I have exactly 1500 jpg's named rgb_00000.jpg rgb_00001.jpg etc. Each image has dimensions 1920 x 1440 (aspect ratio 4:3). These images are sequential and represent someone filming a car.

    


    I have exactly 1500 png's named depth_00000.png depth_00001.png etc
Each image has dimensions 256 x 192 (aspect ratio 4:3). These images are sequential and represent a depth visual for the first set of images.

    


    From these 2 sets of images I want to create 2 videos with the exact same length. The user will then be able to flip between videos.

    


    So I ran this command to generate the first video

    


    cat depth_*.png | ffmpeg -y -f image2pipe -framerate 30 -i - -pix_fmt yuv420p -c:v libx264 depth.mp4


    


    Video created with success. Then I ran this command to output duration information

    


    ffprobe -v quiet -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 depth.mp4


    


    The duration was 51.534

    


    I then repeated these exact same commands on the jpg set of images. Again video was created with success. But this time the duration is 51.905

    


    Why is the duration different given an identical frame rate and image count ? How can I make it so that the duration is identical for both videos (to support jumping between them) ?

    


    Note : I don't want to just truncate the videos to the same length since then they would not be parallel and flipping / jumping between the videos would not be smooth

    


    Many thanks

    


  • Need someone to write a batch shell script to watermark videos via ffmpeg [closed]

    21 janvier 2021, par Shiv Nandan

    I am using a batch shell script on windows server to watermark videos

    


    for %%a in ("X:\input older\*.mp4") do ffmpeg -i "%%a" -vf "movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" "X:\output folder\%%~na.mp4"
pause


    


    It converts all videos from input folder to output folder. I want to...

    


      

    1. Change watermark location after every 10 seconds in video for all videos.

      2. 


    2. Water mark size is perfect when video resolution is 19201080 but its different for low resolution video for example : 1280720 its large, and for 640*360 extra large. So I want to keep the water mark size fixed.

      3. 


    


  • How to write batch shell script to watermark videos via ffmpeg [closed]

    25 janvier 2021, par Shiv Nandan

    I am using a batch shell script on windows server to watermark videos

    


    for %%a in ("X:\input older\*.mp4") do ffmpeg -i "%%a" -vf "movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" "X:\output folder\%%~na.mp4"
pause


    


    It converts all videos from input folder to output folder. I want to...

    


      

    1. Change watermark location after every 10 seconds in video for all videos.

      2. 


    2. Water mark size is perfect when video resolution is 19201080 but its different for low resolution video for example : 1280720 its large, and for 640*360 extra large. So I want to keep the water mark size fixed.

      3. 


    


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