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• Next drawtext clears the previous one ffmpeg

  27 août 2021, par Макс Шульдинер

  ffmpeg.exe -i ffmpeg_inputs/zheltiy_chelik.mp4  -vf "[in]drawtext=fonts/Temporarium.otf:text='r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+0:y=0:enable='between(t,0, 11)', drawtext =fonts/Temporarium.otf:text = 'r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+20:y=0:enable='between(t,11, 22)', drawtext =fonts/Temporarium.otf:text = 'r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+40:y=0:enable='between(t,22, 33)'[out]" ffmpeg_outputs/test2.mp4 -y 


  


  There is such a ffmpeg line. Its meaning is to draw a letter 20 pixels to the right of the current position of the word every 11 seconds, and in this way "write the word". But here's the problem - when the second letter starts to render, it overwrites the first, and the third, respectively, overwrites the second. The string seems to have prescribed [in] and [out] but does not help, maybe someone has ideas

  


• Use palette when using FFMpeg overlay

  16 avril 2017, par nbrogi

  I’m trying to add an overlay to an animated GIF with FFMpeg.

  It works, but the quality is pretty dismal. Basically, I’m unable to use the palette that I generate, and that leads to a lot of dither. The main GIF (meaning, not the overlay) is also very low resolution.

  I would also like to apply opacity to the watermark (and at one point that worked, too), but that’s a plus.

  This is what I have :

  ffmpeg -v error -i image.gif -vf 'palettegen' palette.png -y;
  
  ffmpeg -v error -i image.gif -i watermark.gif -i palette.png -filter_complex '[1:v]scale=80:30, [0:v]overlay=(main_w-overlay_w) - main_h/30:(main_h-overlay_h) - main_h/30, paletteuse' -an image-watermark.gif -y

  At one point I was able to use the palette for the main GIF, so its quality improved. However, the watermark looked pretty bad. It’s pretty obvious that I have to do the overlay, and then the palette, so that the palette include the colors present in the watermark. However, I have no idea how to do that.

  Can someone point me in the right direction ?

• How to Fix Problem Drawer Text and Join with FFmpeg

  13 août 2019, par Marcos QP

  I have two short videos with good state (input1.mp4, input2.mp4).
  I use ffmpeg to edit videos.

  Part 1
  I combine two videos, it works correctly

  Part 2
  I draw text on input1.mp4, result output1.mp4, it works correctly.
  I join two videos (output1.mp4, input2.mp4), its join success. But result video is corrupt.

  ------------------------------------------------------------------

  I use these comands ffmpeg

  Combine Videos
  ffmpeg -y -f concat -safe 0 -i list.txt -c copy merged.mp4

  Draw Text on Video
  ffmpeg -y -i input1.mp4 -vf "drawtext=fontfile=/Windows/fonts/arialbd.ttf : text=’Some Text’ : fontcolor=white : fontsize=50 : box=1 : boxcolor=black@0.5 : boxborderw=5 : x=(w-text_w)/2 : y=(h-text_h/2)" -codec:a copy output1.mp4

  ------------------------------------------------------------------
  

  Please i need your help to drawer text and join.
  Sorry my bad english. I am still learning.
  Thanks.