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    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
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Sur d’autres sites (6628)

  • FFmpeg is slowing down a video in output and I cannot figure out why

    23 août 2020, par S M

    I'm making a python program that uses FFmpeg for I/O. Right now the problem I'm getting is an input video is 3s but output is 9s. Both line up if I stretch them out manually in premiere pro but I want to fix this with ffmpeg. I know my array is 223 frames and I only give FFmpeg the argument "-r 60", but when the command is run and the video is made, it repeats every frame about 3 times, making the resulting video much longer. I can't just add command to make it play video 3 times faster because its not exactly 3 (I don't know what the exact multiplier for difference is). Is there anything I can do to make it not repeat frames ?

    


    Edit : I'm using skvideo.vwrite so I'm not really sure what's happening with FFmpeg but this is the code I have :
    
skvideo.io.vwrite("out.mp4", arr, outputdict = '-r' :'60')
    
Where arr has shape (854, 256, 256, 3)

    


  • I am trying to add draggable text view on video

    24 septembre 2021, par Naveed

    I am trying to add draggable textview on video but unable to get
cordinates of textview according to the video I am using ffmpeg for
adding text to video.

    


    val xPos = width?.let {
           (binding.edtXPos.text.toString().toFloat().times(it)).div(100)
      }
val yPos = height?.let {
          (binding.edtYPos.text.toString().toFloat().times(it)).div(100)
     }
Log.e(TAG, "addTextProcess: x=$xPos and y=$yPos", )


    


    I entering percentage of x and y axis to put but I want to get position of dragable textview cordinated according to video pixels.

    


  • ffmpeg mp4 cut from correct point | without encode

    3 mars 2018, par sword1st

    I’m using this this command for cut my mp4 video :

    ffmpeg -i clip.mp4 -ss 00:00:25 -to 00:01:20 -c copy cutted.mp4

    But there is a problem with this code. My "cutted" clip has black video for a couple seconds and it’s have sync problem on editing software. When i tweak the first parameter -ss like 00:00:24 ... 00:00:23 .... 00:00:26 etc when i found the right position it doesn’t have any black frame or sync problem. I want to learn how can i learn all of this correct times for my video ? I don’t know what should i call these points. Gop or anything else. Is there any solution built-in ffmpeg to learn this times so i can cut them without any corruption ? Thanks !

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