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• ffmpeg javacv audio - integrate audio into video javacv

  16 juillet 2014, par Cyril Lequeux

  I’ve looked for this issue since a while but I didn’t find out any solution...
  I want to create a video from pictures with javacv (great, it works). But now I want to put in a sync way audio into my video. I heard I had to make a byte array with the sound data and then record() according to the audiobitrate/8 = audiobyterate but i didn’t find a simple sample...I’m not the first asking this question but all the same questions are still unanswered

      IplImage Image = cvLoadImage("data/photo.jpg");
  
      FrameRecorder recorder = FFmpegFrameRecorder.createDefault("out.avi", 1920, 1080);
  
      recorder.setVideoCodec(AV_CODEC_ID_MPEG4);
  
      recorder.setFrameRate(30);
  
      recorder.setFormat("avi");
  
      recorder.start();
  
          for(int s=0; s<10; s++){
  
              for(int i=0; i<30; i++){
  
                  recorder.record(Image);
  
  //Here I want to record my music.mp3 stream
  
              }
  
          }
  
          recorder.stop();

  Please help me, I’m desesperate :p
  Ps : I’m using javacv 0.3 FFMPEG 1.06 OpenCv 2.4.3

• ffmpeg : How to add an image to the end of a video, freeze framing the last frame and using a fade

  26 novembre 2019, par Jeremy Thomerson

  (I’ve looked at a number of other similar questions, but can’t find any with an answer that actually works)

  I often need to combine a short video clip with in image. Typically, the video clip is a short explanation of a concept, followed by an image that helps the user visualize the concept. Rarely do the frame sizes / resolution of the video and image match. Typically, I need every second of the video clip to display, so even though I would like a cross-fade between the video and image, I’d like to freeze-frame the final frame of the video, and then cross-fade between that frozen frame and the following image.

  I’d like both the video and image, despite the disparity in their resolutions, to "fit to frame", such that I get an output that’s either a) the size of the larger asset, or b) some fixed size (like 720p), and in either case, both the image and video are scaled to fit into those dimensions, while maintaining their original aspect ratio.

  For example, given the following two assets (video and image), how could I accomplish what’s described above ? (Note : these assets are just ones I found that are available for examples, and not the actual type of content I’d be using ; however, they do accurately represent the disparity in resolution and aspect ratio I’d often have between video and image file).

  • https://file-examples.com/wp-content/uploads/2017/04/file_example_MP4_640_3MG.mp4
  • https://upload.wikimedia.org/wikipedia/commons/e/e8/World_blank_map_countries.PNG

  Bonus : At times, I’d like to :

  1. Reverse the order (image, and then video), or
  2. Have a video and then multiple images, one after the other, faded between each, or
  3. Video, fade to image, then more video

  Note : I’m running ffmpeg on Mac / OSX, installed via brew

  Thanks so much if you can help !

• Play RTP stream in android

  28 mai 2014, par AndroidOptimist

  I know this question is asked several times, but still i didn’t find complete answer for this.

  I would like to play RTP streams in android. From my search i understand that android does not support playing RTP stram and using ffmpeg i can play RTP videos. So, i browsed for good ffmpeg tutorial for playing RTP videos but still i didn’t find anything relevant to my search. I tried like

  ffmpeg play

  rtp using ffmpeg

  and so on.

  but still i don’t know how t play. I googled but couldn’t find. Can anyone please tell me

  1) how to play rtp streamed videos in android using ffmpeg.

  2) please suggest me some good examples or tutorials for the same.

  Thanks in advance.