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• Speed Up Video Processing time FFMPEG while adding multiple images to Video

  5 mars 2019, par Vivek Faldu

  I am trying to overlay multiple images to the video at certain time interval...
  but the processing time is too much for a video length of 1 minute.
  I used VideoKit Library for it.
  Here is my code for adding multiple images to Video.

   String[] command = {"-i", inputPath, 
  
                  "-i", imagePath1,"-i", imagePath2,"-i",imagePath3,
  
                  "-filter_complex",
  
                  "[0][1]overlay=y=H-h:enable='between(t,2,10)'[v1];
  
                   [v1][2]overlay=y=H-h:enable='between(t,10,20)'[v2];
  
                   [v2][3]overlay=y=H-h:enable='between(t,20,30)'[v3]",
  
                  "-map", "[v3]",  outputPath};

  Is there any faster processing library for video processing.

• Video file is hanging after concatenating video files and drawtext to output

  12 avril 2019, par elzix88

  I’m trying to concat 3 video files and add text to output using ffmpeg.
  Each part is 10 sec long.

  I’ve end up with this code :

  ffmpeg -i output3.mp4 -i output2.mp4 -i output1.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0][2:v:0][2:a:0]concat=n=3:v=1:a=1[v][a]; [0:v:0]drawtext=fontfile=tahoma.ttf:text=Sample text:fontcolor=white:fontsize=40:box=1:boxcolor=black@0.7:boxborderw=5:x=100:y=100" -map "[v]" -map "[a]" output.mp4

  The result video has 30 seconds but it hangs after 1st part (10s). When I remove drawtext filter part (just concat), then video is fine, but without text...
  Anyone can help ?

• What do big video companies use to transcode video ? [on hold]

  26 juin 2013, par jays

  I'm reading about video transcoders, and it seems that every open source project out there uses ffmpeg as a backend.

  I'm curious as to what big companies like youtube and justin.tv use to transcode video on such a large scale, since ffmpeg can be a bit of a CPU/memory hog. Or is ffmpeg about as good performance as you can get ?