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• How to extract certain frames from a .yuv video file and create a new video using FFmpeg, OpenCV and python ?

  8 avril 2020, par Ann Baiju

  I have a .yuv video file and a list containing some frame numbers. I need to make a new video with the frame numbers in the list and another video with the frame numbers that are not on the list. How can I do this using FFmpeg and subprocess module in python ? I'm also using OpenCV in the program. I need the new videos in both .yuv and .avi formats.

  


• Convert one image + one video's audio to video with ffmpeg

  5 septembre 2019, par intrlocutr

  I’m trying to convert one video file (flv) and one image file (jpg) to one mp4 video, with the video’s audio sample rate increased, and the image overlayed on top of the audio.

  Right now I’m using this command :

  ffmpeg -i video.flv -loop 1 -i photo.jpg -y -filter:a "asetrate=55786.5‬" -vcodec png -filter:v "pad=ceil(iw/2)*2:ceil(ih/2)*2" -map 1:0 -map 0:1 -y -tune stillimage finalvideo.mp4

  It produces an mp4 that plays just fine in VLC, but will not upload to YouTube, which is what I eventually want to do. I could convert the flv to an mp3 and then to an mp4, with two separate ffmpeg commands, however I’m running this in an environment where time and resources are limited, so I’d like to avoid that if at all possible.

• HTML5 video source video type codecs parameter with ffmpeg [duplicate]

  25 juin 2016, par Matt Joiner

  This question already has an answer here :

  • html5 video tag codecs attribute
    
    2 answers
    

  I’m programmatically adding source tags to a HTML5 video tag. I’m using ffmpeg to generate the content for the source tags. How can I get the appropriate codec value for the source type attribute ?

  <video>
  
      <source src="{{.StreamURL}}" type="video/mp4; codecs=?">
  
  <video>
  
  </video></source></video>