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• FFmpeg filter_complex concat gives only first input on crop

  20 septembre 2018, par Alex Bakanov

  I’ve encoutered problem when using concat and crop with multiple inputs and multiple outputs. Here’s

  ffmpeg -y \
  
  -i input_1.mp4 \
  
  -i input_2.mp4 \
  
  -i input_3.mp4 \
  
  -i input_4.mp4 \
  
  -filter_complex "[0:v][1:v][2:v][3:v]concat=n=4:v=1:a=0[v];\
  
  [v]crop=3840:1080:960:0[center];\
  
  [v]crop=960:1080:0:0[left];\
  
  [v]crop=960:1080:4800:0[right]" \
  
  -map "[center]" -c:v libx264 -preset faster -b:v 20000k -an -pix_fmt yuv420p -tune zerolatency -tune fastdecode "Output_Center.mp4" \
  
  -map "[left]" -c:v libx264 -preset faster -b:v 20000k -an -pix_fmt yuv420p -tune zerolatency -tune fastdecode "Output_Left.mp4" \
  
  -map "[right]" -c:v libx264 -preset faster -b:v 20000k -an -pix_fmt yuv420p -tune zerolatency -tune fastdecode "Output_Right.mp4"

  So there I concatenate 4 inputs into 1 stream [v], then I crop certain parts to [center], [left] and [right]

  For first output (center) it works as expected, output video duration is right (1 + 2 + 3 + 4 input durations), but for left and right outputs duration completely match duration of the first input.

  I’ve also tried use [v1] as output of concat, that didn’t help

• Moviepy swap text mid video

  22 mai 2022, par Runeater DaWizKid

  I want to write text to a video and have it change mid playback, this is what I've tried but it overlays each text on eachother and only displays the text for 5 seconds ?

  


  def generateVideo(initial_text, secondary_text, tertiary_text):
    text_clip = TextClip(txt=initial_text, color='AntiqueWhite1', font='Arial-Bold', fontsize=100)
    text_clip = text_clip.set_position('center').set_duration(5)

    text_clip_secondary = TextClip(txt=secondary_text, color='AntiqueWhite1', font='Arial-Bold', fontsize=100)
    text_clip_secondary = text_clip_secondary.set_position('center').set_duration(10).cutout(0, 5)

    text_clip_tertiary = TextClip(txt=tertiary_text, color='AntiqueWhite1', font='Arial-Bold', fontsize=100)
    text_clip_tertiary = text_clip_tertiary.set_position('center').set_duration(15).cutout(0, 10)
    
    new_video = ColorClip(size=(1920, 1080), color=(0,0,0), duration=15)
    new_video.fps = 24
    
    new_video = CompositeVideoClip([new_video, text_clip, text_clip_secondary, text_clip_tertiary])

    new_video.write_videofile(codec='mpeg4', filename="test.mp4")
    new_video.close()


  


  Anyone see what im doing wrong ?

  


  Edit :
I've also tried the appropriate calls to subclip(pos1, pos2), ie

  


  text_clip_secondary = text_clip_secondary.set_position('center').set_duration(15).subclip(5, 10)


  


  With the same results

  


• Anomalie #4721 : cadre trop petit au moment d’une nouvelle installation, installation impossble

  12 avril 2021

  Je disais, (j’ai supprimé le mauvais commentaire !)

  Que la solution peut être :

  <span class="CodeRay">
  <span class="line comment">@media (min-width: 640px) {</span>
  <span class="line delete"><span class="delete">-</span>    body { display: flex; padding: 2em; flex-direction: column; justify-content: center; align-items: center;}</span>
  <span class="line insert"><span class="insert">+</span>    body { display: flex; padding: 2em; flex-direction: column; justify-content: center; align-items: center;<span class="eyecatcher"> height: auto; min-height: 100%;</span>}</span>
      #minipres { margin: 6em auto; width: 580px;border: 1px solid #DB1762;border-radius: 8px;padding: 2em 2em 1.5em 2em;overflow: hidden;}
      #minipres h1 {margin-top: -2em;margin-left: -2em;margin-right: -2em;padding: 0.8em;font-size: 1.1em;color: white;background: #DB1762;}
  <span class="line comment">}</span>
  </span>
  Télécharger