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• avcodec/motion_est : Attempt to fix "short data segment overflowed" on IA64

  15 janvier 2016, par Michael Niedermayer

  avcodec/motion_est : Attempt to fix "short data segment overflowed" on IA64
  This decreases the MV related encoding table sizes
  
  This should have little effect on real world video encoding performance
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/motion_est.h

• ffmpeg drawtext Arabic fonts doesn't render correctly [closed]

  11 février 2024, par Mahmoud Abdellatief

  what i'm trying to achieve :
loop an image into a video and overlay Arabic Text from the Qur'an on it including the text diacritical mark, using a custom font.

  


  example of the text to be rendered :

  


  بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ


  


  the font used :
https://fonts.qurancomplex.gov.sa/wp02/wp-content/uploads/2024/01/UthmanicHafs_v22.zip

  


  font's unicode module :

  


  Unicode Module 
 
The Research and Development Unit in the Computer Department at King Fahd Glorious Qur’an Printing Complex relied on the unicode system unicode to create (Hafs) font in the Uthmanic Script, because this system is followed globally among computer and systems manufacturing companies in the world.

Unicode organization is a global code group that is used to define all codes and letters used in most of the world's languages and gathered in one code to facilitate the presentation and delivery on information despite of the language used. This global coding uses 1 to 4 bytes (byte = 8 bits) to encode letters, and so far only a third of the number available in Unicode organization to encode the letters of these languages.

Taking into account Hafs font with the Uthmanic Script, which was built entirely on the unicode system. We can explore the basic letters that were formed according to the following figure:

Whereas the font was developed starting from code (0600 ) to code (066FF ) Taking into account there are several encoded letters that haven't been used at all so it was replaces with the code []. The displayed copy above is the one that is been developed from the basic Arabic coding (0600-06FF) which was updated by Unicode organization in 2009.


  


  expected result :
exported video with correctly rendered text using the given font.

  


  actual result :
the text rendered contains only the diacritical marks ( which are the accents on top of the letters ) without the actual letters.


  


  what i tried :
this is my test command which exports just an image for faster results :

  


  Ffmpeg -loop 1  -i "image-2.jpg" -vf "drawtext=text='بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ':fontsize=124:fontcolor=white:fontfile='UthmanicHafsV22.ttf':x=(w-text_w)/2:y=(h-text_h)/2" -frames:v 1  "output.png"


  


  

  • tried adding ft_load_flags , almost tried all of them

  


  • tried text_shaping=1 , with no success

  


  • tried textfile instead of text

  


  • tried changing the font, any font i try with it always have different problems, either some squares instead of the diacritical mark

  


  


  p.s im having same results on both latest ffmpeg compiled by myself on macos terminal with all required libraries enabled , and also on flutter ffmpeg kit full gpl

  


• How do I get videoshow (or any other js package) to merge image and sound files to the length I specify rather than a constant length of 5 seconds ?

  5 décembre 2023, par Bragon

  I’m trying to take an image file and a sound file and merge them together into an mp4 file. To this end, I use videoshow.js which is basically a wrapper for fluent-ffmpeg.js. For some reason, videoshow always sets the duration of the output file to 5 seconds regardless of what I set the loop parameter to. And to top it all off, it fades out the sound towards the end of the clip.

  


  I’m happy for any solution to this even if it doesn’t include the use of videoshow or fluent-ffmpeg.

  


  const url = require('url');
const { smartLog } = require('../services/smart-log');
const { getFile, getDuration } = require('../services/file-service');
const videoshow = require('videoshow');
const path = require('path');
const FFmpeg = require('fluent-ffmpeg');
const fs = require('fs');

const imgToMP4 = (caption, sound, image, duration, output) => {
  smartLog('info', `Converting ${image}`);
  const images = [image];

  const videoOptions = {
    fps: 10,
    loop: duration,
    transition: false,
    videoBitrate: 1024,
    videoCodec: 'libx264',
    size: '640x?',
    audioBitrate: '128k',
    audioChannels: 2,
    format: 'mp4',
    pixelFormat: 'yuv420p',
  };

  videoshow([
    {
      path: image,
    },
  ])
    .audio(sound)
    .save(output)
    .on('start', function (command) {
      smartLog('info', `ffmpeg process started: ${image}`);
    })
    .on('error', function (err) {
      smartLog('error', err);
    })
    .on('end', function (output) {
      smartLog('info', `Video created: ${output}`);
    });
};