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• How to convert raw camera Android data into usual mpeg4 by ffmpeg ?

  12 octobre 2014, par trololo

  I can recieve raw camera data :

   fos = new FileOutputStream (new File(Environment.getExternalStorageDirectory().getPath() + "/video_raw.raw"));
  
  _.mCamera.setPreviewCallback(new Camera.PreviewCallback() {
  
        public synchronized void onPreviewFrame(byte[] data, Camera camera) {
  
  
  
              try {
  
                  if (fos != null)
  
                      fos.write(data);//I can save data to a file
  
  //Environment.getExternalStorageDirectory().getPath() + "/video_raw.raw"
  
                  } catch (IOException e1) {
  
                  // TODO Auto-generated catch block
  
                  e1.printStackTrace();
  
              }
  
  
  
            try{
  
                camera.addCallbackBuffer(data);
  
            }catch (Exception e) {
  
                Log.e("CameraTest", "addCallbackBuffer error");
  
                return;
  
            }
  
            return;
  
        }
  
    });

  and trying to use this library to manipulate with video(audio)-data

  File dir =  new File(_.mediaFile).getParentFile();
  
              FfmpegController fc = new FfmpegController(this, dir);
  
              Clip clip_in = new Clip(Environment.getExternalStorageDirectory().getPath() + "/video_raw.raw");
  
              clip_in.height = 480;
  
              clip_in.width = 720;
  
              clip_in.videoCodec = "rawvideo";
  
              clip_in.videoFilter= "rawvideo";
  
              Clip clip_out = new Clip(Environment.getExternalStorageDirectory().getPath() + "/video15a.mp4");
  
               //put flags in clip
  
              clip_out.videoFps = "30";
  
              clip_out.width = 480;
  
              clip_out.height = 320;
  
              clip_out.videoCodec = "libx264";
  
              clip_out.audioCodec = "copy";
  
              fc.processVideo(clip_in, clip_out, false, new ShellUtils.ShellCallback() {
  
              @Override
  
              public void shellOut(String shellLine) {
  
                  System.out.println("MIX> " + shellLine);
  
              }
  
  
  
              @Override
  
              public void processComplete(int exitValue) {
  
  
  
                  if (exitValue != 0) {
  
                      System.err.println("concat non-zero exit: " + exitValue);
  
                      Log.d("ffmpeg","Compilation error. FFmpeg failed");
  
                      Toast.makeText(AMain.this, "result: ffmpeg failed", Toast.LENGTH_LONG).show();
  
                  } else {
  
                  }
  
              }
  
          });

  Link to the project :
  https://github.com/guardianproject/android-ffmpeg-java

  This code works correctly for any videofile which created before (the other apps). BUt this oce doesn’t work in my case. How to fix it ?

• FFmpeg RTSP to mp4 recording speed raises to x60 when camera microphone is ON

  20 juin 2022, par przemoch

  I'm working with some kind of recorder that uses FFmpeg to capture RTSP stream from various IP cameras. It used to work fine on every camera I tried. That were cameras from various manufacturers, but the configuration was pretty the same.
1080p, ~10 fps, H.264, ~12000 kbps, microphone OFF

  


  Recently, I faced a problem with recording process on some Dahua cameras, when I turned the microphone ON.

  


  Normally I use segment argument to get 60 s video clips, and when microphone is ON, speed parameter grows up to x60 what causes saving clip almost every 1 s. This problem is even stranger as I don't capture audio (-an option), and it occurs only on some Dahua models and doesn't show up on other models.

  


  My command is

  


  ffmpeg -rtsp_transport tcp -i &#x27;rtsp://<user>:<password>@&#x27; -vcodec copy -an -dn -y -segment_time 60 -strftime 1 -reset_timestamps 1 -f segment %Y-%m-%d-%H-%M.mp4&#xA;</password></user>

  


  This problem starts in 2-5 minutes since I change camera settings event if the recording process is already running.
The log from ffmpeg when problem shows up is following :

  


  frame=  609 fps= 10 q=-1.0 size=N/A time=01:01:01.64 bitrate=N/A speed=  63x
frame=  609 fps= 10 q=-1.0 size=N/A time=01:01:01.64 bitrate=N/A speed=  63x
frame=  625 fps= 10 q=-1.0 size=N/A time=01:01:03.24 bitrate=N/A speed=61.4x
frame=  625 fps= 10 q=-1.0 size=N/A time=01:01:03.24 bitrate=N/A speed=61.4x
frame=  630 fps= 10 q=-1.0 size=N/A time=01:01:03.76 bitrate=N/A speed=60.8x
frame=  630 fps= 10 q=-1.0 size=N/A time=01:01:03.76 bitrate=N/A speed=60.8x
frame=  641 fps= 10 q=-1.0 size=N/A time=01:01:04.85 bitrate=N/A speed=59.8x
frame=  641 fps= 10 q=-1.0 size=N/A time=01:01:04.85 bitrate=N/A speed=59.8x


  


  I've tried all audio codecs available for this camera


  


  Camera model is Dahua IPC-EW5541-AS. The same problem is on Dahua IPC-HDBW4231F-AS, but IPC-HDW4433C-A works just normal.

  


  I'm trying to understand what can be wrong here, and how to resolve this issue. It would be really useful for me to be able to turn on microphone and record audio stream in parallel (with other script)

  


  Do you have any idea ?

  


• Ubuntu 16.04 + OpenCV + FFMPEG + CUDA don't open default camera

  20 juillet 2018, par Newton Pasqualini Filho

  I am trying to work with accelerated OpenCV using my own build of FFMPEG with CUDA support for GPU video processing using Python.

  My application must support any kind of video devices, including USB and IP cameras.

  I have a config file parsed with ConfigParser that loads the camera device path, as described in OpenCV documentation we can access usb camera by index number and for IP camera we use RTSP protocol so the path could be sometimes 0 or rtsp://192.168.1.2/0.

  To force the use of FFMPEG behind OpenCV I am trying to open the video capture stream like bellow :

  video_capture = cv.VideoCapture()
  
  stream_opened = video_capture.open(camera_path, cv.CAP_FFMPEG)

  The problem is when I try to open the default USB camera camera_path = 0 the video_capture.open method always returns false, but when it is a RTSP like camera_path = "rtsp://192.168.1.2/1" it open the video capture stream ok.

  When I let OpenCV decide what backend will be used it calls to GStreammer and it opens the capture stream like this :

  video_capture = cv.VideoCapture(camera_path)

  I suspect that FFMPEG does not have any support for capture video from a USB camera, does it ? Is there some missing feature to my ffmpeg build ?

  ffmpeg version N-91487-g1809f1c Copyright (c) 2000-2018 the FFmpeg developers
  
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
  configuration: --prefix=/usr --pkg-config-flags=--static --enable-cuda-sdk --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --nvccflags='-gencode arch=compute_61,code=sm_61 -O2' --enable-gpl --enable-libass --enable-libfdk-aac --enable-libx264 --extra-libs=-lpthread --enable-libx265 --enable-nvenc --enable-nonfree
  
  libavutil      56. 18.102 / 56. 18.102
  
  libavcodec     58. 21.105 / 58. 21.105
  
  libavformat    58. 17.101 / 58. 17.101
  
  libavdevice    58.  4.101 / 58.  4.101
  
  libavfilter     7. 26.100 /  7. 26.100
  
  libswscale      5.  2.100 /  5.  2.100
  
  libswresample   3.  2.100 /  3.  2.100
  
  libpostproc    55.  2.100 / 55.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...