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• Error : avformat_open_input : Protocol not found : -1330794744

  27 octobre 2015, par Lin Juan

  I am building an android stream player using Vitamio.
  Here is my codes :

      mVideoView = (VideoView) findViewById(R.id.videoView);
  
  
  
      path = "https://www.youtube.com/watch?v=vic5gj2qXKg";
  
      mVideoView.setVideoPath(path);
  
  
  
      mVideoView.setMediaController(new MediaController(this));
  
      mVideoView.requestFocus();
  
  
  
      mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
  
          @Override
  
          public void onPrepared(MediaPlayer mediaPlayer) {
  
              mediaPlayer.setPlaybackSpeed(1.0f);
  
          }
  
      });

  But it returns ERROR :

  avformat_open_input : Protocol not found : -1330794744
  error (1, -1330794744)

  I think this error is related to FFMpeg for Vitamio.
  Who can solve this problem ?
  Thank you.

• ffmpeg selects shortest movie but leaves full length audio

  26 octobre 2015, par Stan James

  I’ve created a tool to create a grid of movies, like in the Brady Bunch opening. It’s a cool, funny effect.

  Here’s a sample movie showing the grid.

  

  The problem is that ffmpeg is choosing the shortest movie to determine the maximum length of overlaid videos, but still using the full length of the first audio track to determine the overall output movie length.

  So all my videos stop moving when the shortest one ends, but the audio plays on for full length of the first movie.

  How can I either (1) set the length of the output movie to the longest input movie or (2) match the audio length to the shortest movie length as well ?

  Gist of my script.

  Based on this ffmpeg example usage which exhibits the same audio problem :

  ffmpeg
  
      -i 1.avi -i 2.avi -i 3.avi -i 4.avi
  
      -filter_complex "
  
          nullsrc=size=640x480 [base];
  
          [0:v] setpts=PTS-STARTPTS, scale=320x240 [upperleft];
  
          [1:v] setpts=PTS-STARTPTS, scale=320x240 [upperright];
  
          [2:v] setpts=PTS-STARTPTS, scale=320x240 [lowerleft];
  
          [3:v] setpts=PTS-STARTPTS, scale=320x240 [lowerright];
  
          [base][upperleft] overlay=shortest=1 [tmp1];
  
          [tmp1][upperright] overlay=shortest=1:x=320 [tmp2];
  
          [tmp2][lowerleft] overlay=shortest=1:y=240 [tmp3];
  
          [tmp3][lowerright] overlay=shortest=1:x=320:y=240
  
      "
  
      -c:v libx264 output.mkv

• (IOS) Streaming raw h.264 video from and iphone to a RTSP

  10 octobre 2015, par Eric Jovenitti

  Ok so i’m new to video encoding and decoding and RTSP, but I need to take a third party component video stream i.e. (A quad copter drone) and output that stream to a RTSP. The stream is in raw h.264. The stream comes from the drones sdk i.e.,

  -(void) camera:(DJICamera*)camera didReceivedVideoData:(uint8_t*)videoBuffer length:(int)length{
  
  uint8_t* pBuffer = (uint8_t*)malloc(length);
  
  memcpy(pBuffer, videoBuffer, length);
  
  [[[VideoPreviewer instance] dataQueue] push:pBuffer length:length];

  }

  As you can see the raw video comes in from camera in the uint8_t.
  To my understanding this a decoded raw h.264 stream with Nalu’s an a IDR frame.

  So I want to stream this video to a RTSP so it can be watch on VLC .

  Does anyone know of tutorials or demo code to stream this video via a RTSP ?

  Additionally I found this demo : http://www.gdcl.co.uk/2013/02/20/iOS-Video-Encoding.html

  This sends the iphone camera’s video out to a RTSP and it work well.
  But i can’t figure out how to inject the drones streaming video into this demo RTSP app.

  This demo uses
  AVCaptureDevice to capture the cameras streaming data.

  So my questions from this demo are :
  Is there anyway to make my drones stream an AVCAptureDevice ?
  If not, can i just inject the drones raw data into the where the iphones camera data would be and just use the same properties that the iphome camera already configured ?

  if i can’t do those options can I just use the demos RTSP part ?
  If that’s possible, i can that the iphone camera data is being encoded. Does this mean i would need to encode the drones stream ? if so, how would i go about doing this ? The drones SKD uses FFmpeg to output the video so it can be seen in real time on the iphones screen.

  Thanks so much for the help !