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• VLC: Unable to open SDP file for H265 using FFMPEG

  18 September 2015, by Anakooter

  I am streaming live video using rtp and ffmpeg using this command:

  ffmpeg -re -f v4l2 -framerate 30 -video_size 640x480 -i /dev/video0 -c:v libx265 -tune zerolatency -s 320x240 -preset ultrafast -pix_fmt yuv420p -r 10 -strict experimental -f rtp rtp://127.0.0.1:49170 > ffmpeg.sdp

  The generated sdp file is:
  

  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 127.0.0.1
  
  t=0 0
  
  a=tool:libavformat 56.36.100
  
  m=video 49170 RTP/AVP 96
  
  a=rtpmap:96 H265/9000

  Vlc gives the following error:

  The format of ’file:///home/username/ffmpeg.sdp’ cannot be detected. Have a look at the log for details.

  Terminal gives the following error:
  

  [0xaf801010] ps demux error: cannot peek
  
  [0xaf801010] mjpeg demux error: cannot peek
  
  [0xaf801010] mpgv demux error: cannot peek
  
  [0xaf801010] ps demux error: cannot peek
  
  [0xb6d00618] main input error: no suitable demux module for `file/:///home/username/ffmpeg.sdp'

  If I simply change libx265 -> libx264 in the command and H265 -> H264 the stream runs perfectly fine.

  However I need to stream on H265. Any Suggestions?

• How to open .mp4 file using JavaCV's FFmpegGrabber in Android?

  20 August 2015, by 7bitex

  I’m using JavaCV’s FFmpegFrameGrabber to open an mp4 file and grab frames for processing later. The mp4 file is chosen with an ACTION_GET_CONTENT intent which returns a file URI. Here is my code:

  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(mFileUri.getPath());
  
  grabber.setFormat("mp4");
  
  
  
  AndroidFrameConverter converter = new AndroidFrameConverter();
  
  try {
  
      grabber.start();
  
      Frame frame;
  
      while ((frame = grabber.grabFrame()) != null) {
  
          mImageResult.setImageBitmap(converter.convert(frame));
  
      }
  
  
  
      grabber.stop();
  
  } catch (FrameGrabber.Exception ex) {
  
      Log.e("Detector", ex.getLocalizedMessage());
  
  }

  But an error occurs saying avformat_open_input() error -13: Could not open input "/storage/emulated/0/DCIM/Camera/VID_20150820_152542.mp4". (Has setFormat() been called?). So where is wrong with my code?

• Unable to open mp4 video file with VideoCapture with OpenCV 3.0 before and after recompiling with ffmpeg

  19 August 2015, by ricardo_8990

  When running

  VideoCapture cap;
  
  cap.open("GOPR3252.mp4");
  
  
  
  if(!cap.isOpened())
  
  {
  
      return -1;
  
  }

  I couldn’t open the video, even though I tried to manually add the codec CV_FOURCC(’A’, ’V’, ’C’, ’1’). I read that this may be due to the link with ffmpeg. So I compiled and installed ffmpeg using this guide and this one.

  Later, I uninstalled OpenCV, downloaded and compiled using CMake as:

  cmake -D CMAKE_SHARED_LINKER_FLAGS=-Wl,-Bsymbolic -D WITH_FFMPEG=ON -D WITH_QT=ON -D BUILD_EXAMPLES=ON CMAKE_BUILD_TYPE=Release /route_to_software/opencv/

  However, all the time I get this in the resume at the video section:

  --   Video I/O:
  
  --     DC1394 1.x:                  NO
  
  --     DC1394 2.x:                  NO
  
  --     FFMPEG:                      NO
  
  --       codec:                     NO
  
  --       format:                    NO
  
  --       util:                      NO
  
  --       swscale:                   NO
  
  --       resample:                  NO
  
  --       gentoo-style:              NO
  
  --     GStreamer:                   NO
  
  --     OpenNI:                      NO
  
  --     OpenNI PrimeSensor Modules:  NO
  
  --     OpenNI2:                     NO
  
  --     PvAPI:                       NO
  
  --     GigEVisionSDK:               NO
  
  --     UniCap:                      NO
  
  --     UniCap ucil:                 NO
  
  --     V4L/V4L2:                    NO/YES
  
  --     XIMEA:                       NO
  
  --     Xine:                        NO
  
  --     gPhoto2:                     NO
  
  --

  I have no problem making and installing OpenCV, but I still can’t open that video.

  Then, I tried to convert the video from mp4 to avi and got this error when reading the video file:

  Unexpected list type. Expected: hdrl. Got: movi.

  I tried with different formats as 3gp, wmv with any luck.

  I am running out of ideas. Any clue what I am doing wrong?

  EDIT
  After uninstalling again ffmpeg and OpenCV. Then I installed ffmpeg from the packman repositories with libffmpeg-dev, compile and install OpenCV. I can play the video in the avi format but I still get this message:

  Unexpected list type. Expected: hdrl. Got: movi.

  I am using OpenSUSE 13.2

  Thanks in advance,