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• Is there a way to utilize FFMpeg in .NET MAUI for editing videos ?

  9 février 2024, par D Eatchel

  I've tried to find all the information I can about utilizing FFMpeg inside of .NET MAUI (iOS & Android) to easily edit videos on the device, but it seems like there is very little information on how to accomplish this.

  


  FFMpeg is widely used in the video industry, and I believe a FFMpeg plugin for .NET MAUI would be hugely beneficial to the MAUI community.

  


  It looks like you can use dependency injection to get interfaces for each OS with their own binaries, but I personally haven't been able to get this to work.

  


• Combine/Concatenate 3 videos with crossfade

  29 septembre 2016, par Zalon

  I wan’t to combine 3 videos using ffmpeg, and have a crossfade between the videos. I’ve been able to do this with 2 videos using the code below.

  What I would like to do is have a end result like this :

  intro
  
  <crossfade>
  
  video
  
  <crossfade>
  
  outro
  
  </crossfade></crossfade>

  Can someone help me convert this code to be used with 3 videos ?

  ffmpeg -i intro.mp4 -i video.mp4 -an \
  
  -filter_complex \
  
  "   [0:v]trim=start=0:end=9,setpts=PTS-STARTPTS[firstclip];
  
      [1:v]trim=start=1,setpts=PTS-STARTPTS[secondclip];
  
      [0:v]trim=start=9:end=10,setpts=PTS-STARTPTS[fadeoutsrc];
  
      [1:v]trim=start=0:end=1,setpts=PTS-STARTPTS[fadeinsrc];
  
      [fadeinsrc]format=pix_fmts=yuva420p,
  
                  fade=t=in:st=0:d=1:alpha=1[fadein];
  
      [fadeoutsrc]format=pix_fmts=yuva420p,
  
                  fade=t=out:st=0:d=1:alpha=1[fadeout];
  
      [fadein]fifo[fadeinfifo];
  
      [fadeout]fifo[fadeoutfifo];
  
      [fadeoutfifo][fadeinfifo]overlay[crossfade];
  
      [firstclip][crossfade][secondclip]concat=n=3[output];
  
      [0:a][1:a] acrossfade=d=1 [audio]
  
  " \
  
  -map "[output]" -map "[audio]" result.mp4

• FFmpeg transcoding stretches Vertically recorded videos

  28 juin 2017, par oteamm

  Hi I am having an issue with the Transcoder (FFmpeg) .

  Problem Details :
  Vertically recorded videos are appearing stretched (widened) upon transcode.

  For videos which are recorded vertically (height is more than width), the transcoded video generated does shrink vertically. If we change the aspect ratio for such files it will ruin the other video transcodes for which the transcode is generating correctly.

  Expected Behaviour :
  should not shrink/stretch vertically recorded videos

  Impact :
  we are seeing a distorted version of video, stretched horizontally

  Notes :
  Version of FFmpeg Software that you’re is used : - ffmpeg-2.8.6-win64
  (default Settings used)

  Request :
  Need to a way to correct this as if we change the aspect ratio for such files it will ruin the other video proxies for which the proxy is generating correctly.
  Please suggest, if there is any way to AUTO select the aspect ratio of original file and generate transcode accordingly. Thanks !