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• Is there a way to save a matplotlib animation as a video (with ffmpeg) so that the last frame is held for N seconds ?

  2 décembre 2020, par janluke

  I'm using FFMpegWriter to save a matplotlib animation as a video. I'd like to hold the last frame for some seconds at the end of the video.

  


  As a workaround, one could modify the animation itself by repeating the last frame for a number of extra steps. This number of steps can be computed as a function of the desired "hold duration" and the interval/fps of the animation.

  


  Nonetheless, I'd like to know if there's a cleaner way to do the same without artificially modifying the animation itself and using instead some extra arguments for the writer (which uses ffmpeg in my case). Unfortunately I don't know much of ffmpeg so I'd like to have some help.

  


  Thank you.

  


• What's the best FFMPEG Minterpolate settings for animation ?

  1er décembre 2020, par DefyEnjoy

  So, I've been searching for minterpolate settings that fit best, or is the closest to DAIN, but I can't really find some that fit best to how DAIN works.
  
Usually, this is the minterpolate code I use :
  

  


  ffmpeg -i inputfile.mp4 -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=120:me=fss'" outputfile.mp4


  


  I've searched again and again multiple times, but my search just keeps coming back to this line of code being the best settings for what's I'm looking for.
  
But, does anybody here have any better suggestions for ones that look closest to DAIN, or is the best settings for animation ?
  
Thanks !

  


• Crossfade Animation with multiple Images using Ffmpeg

  15 avril 2022, par Vivek Thummar

  I'm creating video with Multiple images using Ffmpeg and i'm using given link -

  


  (Remember most important thing is All the images have different sizes)

  


  https://superuser.com/a/834035/1243959

  


  Now First of all i'm creating video with fade in/out animation and for that i'm using 3rd code with title For input images with varying or arbitrary sizes and it works well -

  


  ffmpeg \
-loop 1 -t 5 -i input0.png \
-loop 1 -t 5 -i input1.png \
-loop 1 -t 5 -i input2.png \
-loop 1 -t 5 -i input3.png \
-loop 1 -t 5 -i input4.png \
-filter_complex \
"[0:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=out:st=4:d=1[v0]; \
 [1:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v1]; \
 [2:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v2]; \
 [3:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v3]; \
 [4:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=in:st=0:d=1,fade=t=out:st=4:d=1[v4]; \
 [v0][v1][v2][v3][v4]concat=n=5:v=1:a=0,format=yuv420p[v]" -map "[v]" out.mp4


  


  but when i want to create Cross Fade animation using given command with the title MP4 output in Cross fade section,in output video,portrait images are fits into video,but square and landscape images are getting cropped (@llogan has specified that if images have different sizes than we have to use same command which is used for fade in/out) -

  


  ffmpeg \
-loop 1 -t 5 -i 1.png \
-loop 1 -t 5 -i 2.png \
-loop 1 -t 5 -i 3.png \
-loop 1 -t 5 -i 4.png \
-loop 1 -t 5 -i 5.png \
-filter_complex \
"[1]format=yuva444p,fade=d=1:t=in:alpha=1,setpts=PTS-STARTPTS+4/TB[f0]; \
 [2]format=yuva444p,fade=d=1:t=in:alpha=1,setpts=PTS-STARTPTS+8/TB[f1]; \
 [3]format=yuva444p,fade=d=1:t=in:alpha=1,setpts=PTS-STARTPTS+12/TB[f2]; \
 [4]format=yuva444p,fade=d=1:t=in:alpha=1,setpts=PTS-STARTPTS+16/TB[f3]; \
 [0][f0]overlay[bg1];[bg1][f1]overlay[bg2];[bg2][f2]overlay[bg3]; \
 [bg3][f3]overlay,format=yuv420p[v]" -map "[v]" -movflags +faststart out.mp4


  


  But I don't know exactly what to do and I think I have to first fit the images in a certain ratio like 1280 * 720, by which all the images will be of same size and then the animation should be applied to those images and may be different solution can work too but right now I'm confused about what to do because I've tried a lot of solutions like scaling images and some other attempts and not a single solution worked (maybe I didn't even try right)..

  


  if SAR and DAR can help than they are as below
(I don't know difference between these variables) :

  


  SAR 1:1 / DAR 197:295
SAR 1:1 / DAR 2:3
SAR 96:96 / DAR 16:9
SAR 1:1 DAR / 540:961
SAR 1:1 DAR / 2567:3113


  


  Any help will be appreciated..Thank you !