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• FFmpeg remove background of video with no black outline

  26 février 2024, par Duc Pham The

  Im using this ffmpeg command to overlay a video on video(with remove black background)

  


  ffmpeg -i /home/ducpt/bunny.mp4 -i overlay_video.mp4 -filter_complex "[1:v]colorkey=0x000000:0.1:0.1[ckout];[0:v][ckout]overlay=enable='between(t,0, 4)':format=rgb[out]" -map '[out]' output.mp4


  


  I used filter_complex "colorkey 0x000000:0.1:0.1" to remove background of overlay video but result have a black outline.

  


  This is screenshot of video overlay original


  


  And this is result

  


  

  


  I tried to use unpremultiply=inplace=1 to remove black outline but not working

  


  ffmpeg -i /home/ducpt/bunny.mp4 -i overlay_video.mp4 -filter_complex "[1:v]colorkey=0x000000:0.1:0.1[ckout];[ckout]unpremultiply=inplace=1 [ckout2];[0:v][ckout2]overlay=enable='between(t,0, 4)':format=rgb[out]" -map '[out]' output.mp4


  


  Please help me remove black outline :(

  


  Sorry for my bad English !

  


• Simplest way to download m3u8 video and convert to mp4 in Android [on hold]

  26 novembre 2018, par jeffin george

  I’m looking for the simplest way to download m3u8 video and convert to mp4 without FFmpeg because it’s very huge it expands my apk size, anybody please tells me a good solution for this problems, any libraries better than ffmpeg ? or any other solution that can apply in server-side like that ?
  Thank you

• Download a part of youtube video using a powershell script

  26 octobre 2024, par Nguyễn Đức Minh

  I'm writing this Powershell script :

  


  $URL = "https://www.youtube.com/watch?v=KbuwueqEJL0"
$from = 00:06:15
$to = 00:09:17

$cmdOutput = (youtube-dl --get-url $URL) 

ffmpeg -ss $from -to $to -i  -ss $from -to $to -i  output.mkv


  


  This script's purpose is to download a part of a Youtube video. I've set the variable $URL to specify the Youtube URL, while $from and $to is the start and end time of the part I want to download.

  


  $cmdOutput is used to output the stream URL. The output would have two lines : the first one is the URL for the video stream, while the second one is the audio stream URL.

  


  Currently, I don't know how to use the output as a variable and specify the line number of $cmdOutput to put it into the correct stream. I guess and would be replaced by something like $cmdOutput[line 1], and $cmdOutput[line 2], though I know that those are incorrect.

  


  I've consulted this answer, and it is handy for me to write this script. I've also read Boris Lipschitz's answer on how to do the same thing with Python, but his answer does not work.

  


  In that script, the -ss flag inputs the seeking point, and the -t <duration></duration> flag tells FFmpeg to stop encoding after the specified duration. For example, if the start time is 00:02:00 and the duration is 00:03:00, FFmpeg would download from 00:02:00 to 00:05:00, which is not the expected outcome. For some reason, his Python script skips the first 5 seconds of output, even if I replace the -t flag with -to . I've tried to edit his script, but it does not work unless you explicitly specify the time for both video and audio stream, as well as their respective stream URL.