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Sur d’autres sites (6685)

  • drawtext japanese language by ffmpeg !!! plz help me

    26 juillet 2021, par Callum McGrath

    I use drawtext command to write text on video, I succeeded in English but when I use Japanese, the video output shows a square.... I can't edit it here is my code

    


    ffmpeg -y -i "{input}.*" -vf "drawtext="textfile=1.txt:fontfile=/path/to/HGRSMP.ttf:y=20:x=w-t*150:fontcolor=red:fontsize=50"" -codec:a copy "{output}123.*"


    


    File 1.txt :

    


    


    どのように私に約束をしましたか
Plz help me !

    


    


  • How create a circular video (transparent area on top of video) effect without applying image mask to video

    26 septembre 2024, par Arina Lubimova

    Basically i googled a lot and solutions suggests apply some PNG mask or do not provide needed solution.

    


    What i've found.

    


    ffmpeg -i main.mkv -i facecloseup.mkv
 -filter_complex "[1]trim=end_frame=1,
  geq='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),pow(min(W/2,H/2),2)),255,0)':128:128,
  loop=-1:1,setpts=N/FRAME_RATE/TB[mask];
  [1][mask]alphamerge[cutout];
  [0][cutout]overlay=x=W-w:y=0[v];
  [0][1]amix=2[a]"
 -map "[v]" -map "[a]"  out.mp4


    


    command = "-i " + this.video1Path.getPath() + " -i " + this.video2Path.getPath() + " -filter_complex [1]trim=end_frame=1,geq=lum_expr='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3)," + (this.mZoomLayout.getZoomedWidth()/2) + "*" + (this.mZoomLayout.getZoomedWidth()/2) + "),255,0)':128:128,format=gray,loop=-1:1,setpts=N/FRAME_RATE/TB[mask];[1][mask]alphamerge,format=rgba,lutrgb=a=if(gte(val\\,16)\\,val)[cutout];[0][cutout]overlay=" + this.mZoomLayout.getCircleX() + ":" + this.mZoomLayout.getCircleY() + ":enable='between(t,0," + this.videoTwoDuration + ") -c:v libx264 -crf 24 -preset ultrafast " + videoPath.getPath(); 


    


    So i tried to extract needed things from them, but i don't understand how exactly i need to do that, i did this :

    


    ffmpeg -i video.mp4 -filter_complex "[0]geq='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),pow(min(W/2,H/2),2)),255,0)':H:W; [0:v][mask]alphamerge" out.mp4


    


    [mov,mp4,m4a,3gp,3g2,mj2 @ 000001f761dd8e40] Invalid stream specifier: mask.
    Last message repeated 1 times
Stream specifier 'mask' in filtergraph description [0]geq='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),pow(min(W/2,H/2),2)),255,0)':H:W; [0:v][mask]alphamerge matches no streams.


    


    ffmpeg -i video.mp4 -filter_complex "[0]geq=lum_expr='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),pow(min(W/2,H/2),2)),255,0)':H:W; [0:v][mask]alphamerge" out.mp4


    


    [mov,mp4,m4a,3gp,3g2,mj2 @ 000001bfd9218e80] Invalid stream specifier: mask.
    Last message repeated 1 times
Stream specifier 'mask' in filtergraph description [0]geq=lum_expr='st(3,pow(X-(W/2),2)+pow(Y-(H/2),2));if(lte(ld(3),pow(min(W/2,H/2),2)),255,0)':H:W; [0:v][mask]alphamerge matches no streams.


    


    And one more time, guys, if you are going to post some "prepared image mask" solution - just leave, the question is about creating mask on air.

    


    So, let's say we have red square (yes, ratio is static, always 1:1), yes, i can't post it because i dont have 10 rep. (...).

    


    https://i.sstatic.net/MsL71.png - red square.

    


    https://i.sstatic.net/aIFEV.png - circle

    


    https://i.sstatic.net/R8EAx.png - result

    


    https://i.sstatic.net/WtqQg.png - final result

    


    I actually want to get the answer from @Gyan or @llogan because i searched a lot and only these two guys do understand how to make things programmatically.

    


    More tech details :
Aspect ratio is constant - 1:1, width and height should be taken from the video in auto way, we need to create a white square with transparent circle inside it, the end result must contain "rounded" video with white background.

    


  • scaling and cutting a portion of video using ffmpeg

    19 août 2014, par Dnaso

    I am trying to upload a video that is 640 x 480. Using FFmpeg I am trying to resize to a square but I am having much difficulty.

    if i use s=320x320 in my command or scale 320x320

        ->setVideoScale(320, 320)

    the image is distored.

    If i change the aspect ratio 1:1 i get black bars.

    is there a way to actually just cut a RECT in the video. IE i want to be able to re save the video and it only capture

       x 0 to 320
    
   y 0 to 320  

    or whatever bounds I pick.

    Basically I do not want to re-size I just want to be able to re record a certain portion of the video. is this possible ?

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