Sur d’autres sites (1203)

• What's filter needed when covert gif to mp4

  23 juillet 2018, par CoXier

  I am using below command to convert gif to mp4.

  ffmpeg -i test.gif -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -pix_fmt yuv420p -y  output.mp4

  I know there are many filters in FFmpeg but which filters are need here ?

  I think scale is needed.

  EDIT

  I am sorry that I have not made my question clear.

  In fact, I wan to only configure specific filters when I build ffmpeg. So I want to know when convert gif to mp4, which filters are needed.

• ffmpeg - overlay multiple fading texts with different colors

  18 novembre 2017, par Abc123

  I have problem with this ffmpeg command, it works fine if the fading text is in white font color, but if I change the fontcolor to something else (for example black), the fading text will not appear, any ideas ?

  ffmpeg -i ./based_video/480/clip3.mp4 -filter_complex "color=black:100x100[c]; [c][0]scale2ref[ct][mv0]; \
  
  [ct]setsar=1,split=3[t1][t2][t3]; \
  
  [t1]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text1][alpha1]; \
  
  [text1][alpha1]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta1]; \
  
  [t2]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text2][alpha2]; \
  
  [text2][alpha2]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta2]; \
  
  [t3]drawtext=fontfile=/usr/share/fonts/truetype/roboto/Roboto-Bold.ttf:text='\$30,000.0':fontsize=40:fontcolor=white,split[text3][alpha3]; \
  
  [text3][alpha3]alphamerge,fade=t=in:st=1:d=1:alpha=1,fade=t=out:st=5:d=1:alpha=1[txta3]; \
  
  [mv0][txta1]overlay=x='100':y='200':shortest=1[mv1]; \
  
  [mv1][txta2]overlay=x='300':y='200':shortest=1[mv2]; \
  
  [mv2][txta3]overlay=x='500':y='200':shortest=1" \
  
  -c:v libx264 -c:a copy ./output_video/testnew-clip3-output.mp4

  full log is here :
  https://docs.google.com/document/d/1y9Dnn0Df75J8P_hZ6LjHTX2dk-8z97UnTjlX8dnc0v0/edit?usp=sharing

  Thanks in advance

• Insert easing to a video

  25 octobre 2015, par Nicos Karalis

  I’m using ffmpeg to create a video from a sequence of images, using the command :

  ffmpeg -r 1/5 -i e%02d.jpg -c:v libx264 -r 30 -pix_fmt yuv420p outputVideo.mp4

  Is it possible to add a ease-in-out to the video ?

  EDIT

  To the "unclear vote" : This command makes a slideshow, each image will have the same screen time, I want to make the firsts and the lasts images with more screen time.

  Its now more clear ?