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• how to set effect on video in android programmatically ?

  12 mai 2016, par Mayank Sugandhi

  I have video which is save in sdcard, now i want to apply the effect like black and white and etc. it’s functionality like editing in video which is already in photo editor or video editor applications.

  now i want to that functionality in android programmatically ? when user choose black and white color in option then it should be response very quickly and change the effect of our video and save it sdcard.

  i have find some solution for this like,

  https://github.com/krazykira/VidEffects 

  but it has not save functionality of video and if i go through in
  "FFMPEG" library then it is not responding very quickly ?

  how can i change the effect of video and save this video in sdcard ?

  Thank You

• ffmpeg Fade-in stuck at first frame

  14 janvier 2017, par Pradeep Varadharajan

  I am trying to apply a fade-in effect at the start of a video and a fade-out effect at the end of a video.

  The fade-out effect works as I expect. However the fade-in doesn’t. I am noticing that at the starting, when the video is supposed to be black before fading in, the initial frame shows up vaguely and is stuck till the fade duration ends. The Audio fade-in seems to work correctly however.

  ffmpeg -i infile.mp4 -strict experimental -y -vf "fade=t=out:st=28:d=2, fade=t=in:st=2:d=2" -af "afade=t=out:st=28:d=2, afade=t=in:st=2:d=2" fade_in.mp4

  Can someone please help me understand what I am doing wrong here ?

  According to ffmpeg documentation for this filter, the below example is supposed to make the first 5.5 seconds black, then fade in for 0.5 seconds :

  fade=t=in:st=5.5:d=0.5

• FFMPEG : Creating video using drawtext along with word wrap and padding

  11 octobre 2022, par Chaitanya Sai

  I'm working to create a video from text with drawtext filter. Output video i can see the text is overflowing instead of coming in new line.

  



  Is there any way i can archive word wrapping and also set the internal padding to video ?

  



  Below is the snippet I'm using to generate video from text

  



  ffmpeg.exe -f lavfi -i color=c=white:s=640x480:d=5.396 -vf "[in] drawtext=fontfile=font.ttf:fontsize=20:fontcolor=black:x=0+0*print(tw):y=0+0*print(th):text='this is new whiteboard te':enable='between(t,6.634,6.818)',drawtext=fontfile=font.ttf:fontsize=20:fontcolor=black:x=0+0*print(tw):y=0+0*print(th):text='this is new whiteboard testing':enable='between(t,0.0,2.032)',drawtext=fontfile=font.ttf:fontsize=20:fontcolor=black:x=0+0*print(tw):y=0+0*print(th):text='this is new whiteboard testing no padding and the text is overflowing from the video frame check this  need to acheve word wrapping':enable='between(t,2.032,5.396)'"[out] -c:v libx264 -t 30 -crf 30 ../output.mp4


  



  Output looks like this