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• How to subtitle text area coordinates in high resolution images

  18 mars 2015, par Vinay

  I have high resolution images(1920x1080) for subtitles. It is taking more time to display these images as subtitles in the media player we are developing. Once I load the image data into a buffer I need to know if there is standard technique to find the text area where subtitle occurs in the image,say like coordinates (a,b,c,d) inside this area subtitle occurs.How to approach this problem. Using c++,Qt,ff mpeg in our project.

• Audio to text is slow and words are getting dropped

  8 mars 2019, par Madhur Yadav

  I have a code which takes videos from an input folder, converts it into audio file(.wav) using ffmpeg.
  It then converts the audio file to text by recording 30 seconds audio (dura=30) and converting it to text using google translate api.

  The problem is that the code takes a lot of time to convert video to text and it drops first two words and some words after every 30 seconds.

  import speech_recognition as sr
  
  import sys
  
  import shutil
  
  from googletrans import Translator
  
  from pathlib import Path
  
  import os
  
  import wave
  
  def audio_to_text(self,video_lst,deploy_path,video_path,audio_path):
  
      try:
  
          txt_lst=[]
  
          for video_file in video_lst:
  
              file_part=video_file.split('.')
  
              audio_path_mod = audio_path +'/'+ '.'.join(file_part[:-1])
  
              dir_path=video_path+'.'.join(file_part[:-1])
  
              self.createDirectory(audio_path_mod)
  
              audio_file='.'.join(file_part[:-1])+'.wav'
  
              command_ffmpeg='set PATH=%PATH%;'+deploy_path.replace('config','script')+'audio_video/ffmpeg/bin/'
  
              command='ffmpeg -i '+video_path+'/'+video_file+' '+audio_path_mod+'/'+audio_file
  
              os.system(command_ffmpeg)
  
              os.system(command)
  
              r=sr.Recognizer()
  
              dura=30
  
              lang='en'
  
              wav_filename=audio_path_mod+'/'+audio_file
  
  
  
              f = wave.open(wav_filename, 'r')
  
              frames = f.getnframes()
  
              rate = f.getframerate()
  
              audio_duration = frames / float(rate)
  
              final_text_lst=[]
  
              counter=0
  
  
  
              with sr.AudioFile(wav_filename) as source:
  
                  while countercode>

  Any help/suggestion would be valuable. Thanks in advance.

• React Native alternatives to ffmpeg-kit-react-native for adding text overlays to videos ?

  3 avril, par Sanjay Kalal

  I’m developing a React Native app where I need to add text overlays to videos. I was using ffmpeg-kit-react-native, but this library is deprecated, I am looking for efficient alternative and add overlay text on video and then share it with overlay text.

  


  Are there any React Native libraries or native integrations that can efficiently add text overlays to videos without using ffmpeg ?