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Sur d’autres sites (10972)

  • How to draw a text with perspective using ffmpeg

    18 novembre 2022, par Facundo

    I need to add a text to a video using ffmpeg and it needs to be with perspective like in the image.

    


    img

    


    i have tried with perspective but i get perspective into the whole video not only the text.

    


    How can i do this ?

    


  • How to create a sliding text in a video with ffmpeg

    12 avril 2014, par NickName

    I am trying to put a line from right to left in a video with ffmpeg but it is not working.

    My command is :

    ffmpeg -i input.avi -vf drawtext="fontfile=C\\:/Windows/Fonts/arial.ttf:text='YOUR TEXT HERE':fontcolor=white@1.0:fontsize=40:y=h-h/2:x=t*50" -y output.avi

  • Changing Text on Slideshow with ffmpeg

    16 avril 2018, par Hauke

    I have a directory full of *.jpg images which I want to concatenate to a video. This works fine with the concat-video filter :

    ffmpeg -f concat -safe 0 -i files.txt -c:v libx264 -pix_fmt yuv420p out.mp4

    The file.txt contains the list of absolute pathnames of the images. This list is created by the find-command on linux bash.

    Now I want to add a text overlay, where every image shows a text representing the creation date.

    I found the drawtext video-filter like in this answer : Text on video ffmpeg

    However, I think I cannot set a video-filter per file when using the concat filter ; I understand I can only set one filter for the whole ffmpeg-call.

    Is there any other way to concatenate the files to a video and add text individually to each image ?

    EDIT : A trivial solution is to add the text to the images first by iterting the images. This would either irreversably change the images or create copies and thus double the disk space requirement even temporarily. It would be preferable to add the text on-the-fly for each frame so that there is no additional disk space required.

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