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• Mathematical formula to always center text along X and Y axis ffmpeg python ?

  18 février 2023, par Sixtus Anyanwu

  I am trying to center a text horizontally and vertically with ffmpeg python but I can't seem to get it right. The mid point shifts depending on the amount of characters in the text.

  


  How do I always center the text to the centre of the screen no matter the length of the text ?

  


  Here is my code.

  


  
v_width = 1080

v_height = 1633

def create_video():

    overlay1 = ffmpeg.input("sukuna.gif").filter("scale", 1080, -1, height = 1633 / 2)

    overlay2 = ffmpeg.input("akaza_long.mp4").filter("scale", 1080, -1, height = 1633 / 2 )

    (

    ffmpeg.input('letsgo.mp4')

    .overlay(overlay1)

    .overlay(overlay2, x = 0, y = v_height / 2)

    .drawtext(textfile = "char_names.txt", fontfile = "/storage/emulated/0/PyFiles/Helvetica-Bold.ttf", fontcolor = "yellow", bordercolor = "black", escape_text = True, start_number = 0, fontsize = "80", x = (v_width / 2) - 40, y = (v_height / 2) - 40, borderw = 4, line_spacing = 3)

    .output("newVideo.mp4")

    .run()

    )


  


  The - 40 is for adding some extra padding to the text.

  


  How do I go about this ?

  


  I want the below position always no matter how big or amount of characters in the text.
Centred text

  


  Already tried adding a couple of offset to the text but once the text gets longer, it loses its alignment.

  


• movtextdec : Add support for automatic text wrapping

  14 août 2015, par Niklesh

  movtextdec : Add support for automatic text wrapping
  The value of wrap_flag in the Text Wrap Box specifies if the text is to
  
  be wrapped or not. Uses ’end of line wrap’ amongst the wrap styles
  
  supported by ASS if the text is to be wrapped, i.e ; fill as much text
  
  in a line as possible, then break to next line.
  The 3GPP spec has no provision for smart wrapping.
  Signed-off-by : Niklesh <niklesh.lalwani@iitb.ac.in>
  

  • [DH] libavcodec/movtextdec.c

• 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.