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• How to set dateTime over captured video in android ?

  3 février 2016, par Anish Kumar

  I’m developing a project with camera activity. I need to set current date and Time to the video which I captured and compress and save it in SD Card. I searched a lot in Google, but I am unable to achieve this.

  Here is my Code

  private void recordVideo() {
  
      Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
  
  
  
      fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);
  
  
  
      // set video quality
  
      intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
  
     intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT,10);
  
      intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file
  
      // name
  
  
  
      // start the video capture Intent
  
      startActivityForResult(intent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE);
  
  }
  
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  
      if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) {
  
          if (resultCode == RESULT_OK) {
  
  
  
              pass=fileUri;
  
  
  
              try
  
              {
  
                  b = ThumbnailUtils.createVideoThumbnail(fileUri.getPath(), MediaStore.Video.Thumbnails.MICRO_KIND);
  
              }
  
              catch (Exception e)
  
              {
  
                  Log.e("EXX",e.getMessage());
  
                  Toast.makeText(getApplicationContext(),"Uri is empty", Toast.LENGTH_SHORT).show();
  
              }
  
          if (b == null)
  
          {
  
              cvideo.setImageResource(R.drawable.video);
  
              ipreview.setVisibility(View.INVISIBLE);
  
              Toast.makeText(getApplicationContext(),
  
                      "Unable to set Thumbnail ", Toast.LENGTH_SHORT)
  
                      .show();
  
  
  
          } else {
  
              cvideo.setImageBitmap(b);
  
              LoadJNI vk = new LoadJNI();
  
              try {
  
                  String workFolder = getApplicationContext().getFilesDir().getAbsolutePath();
  
                  String[] complexCommand = {"ffmpeg","-i", fileUri.getPath()};
  
                  vk.run(complexCommand, workFolder, getApplicationContext());
  
                  Log.i("test", "ffmpeg4android finished successfully");
  
              } catch (Throwable e) {
  
                  Log.e("test", "vk run exception.", e);
  
              }
  
             tphoto.setImageResource(R.drawable.camera1);
  
              ipreview.setVisibility(View.VISIBLE);
  
              //flag=1;
  
          }
  
          } else if (resultCode == RESULT_CANCELED) {
  
              // user cancelled recording
  
              Toast.makeText(getApplicationContext(),
  
                      "User cancelled video recording", Toast.LENGTH_SHORT)
  
                      .show();
  
          } else {
  
              // failed to record video
  
              Toast.makeText(getApplicationContext(),
  
                      "Sorry! Failed to record video", Toast.LENGTH_SHORT)
  
                      .show();
  
          }
  
      }

  I did the same concept in Captured Image, I used Canvas to draw date Time over image and saved in SD Card. But I don’t know how to perform this task.

• FFMPEG & OPENGL - RAW Frames

  27 mars 2015, par Marco Reisacher

  I’m building a recorder using a BlackMagic DeckLink Card.
  The program is using OpenGL to display the Frames and FFMPEG (with the glReadPixels() method) to record them.
  I’m setting the viewport in my program to apply a automatic letter-/pillarbox whether the Image/Monitor is 16:9/4:3.
  The problem with that ist that when i capture these frames of this viewport they get of course recorded in the resolution my viewport is (i.e. Full Hd source -> viewport due to monitor with 1600x1200 resolution -> letterbox down to 1600x900) and so FFMPEG records those 1600x1200 with black bars at the top/bottom.

  Is there any possibility to grab the RAW Frame before it gets passed trough the setViewport function and all the rescaling stuff ?

• FFMPEG & HW Acceleration Unable to find a suitable output format for 'cuda' ?

  10 juillet 2022, par user2522885

  I'm curious about FFMPEG and GPU hardware acceleration. My Windows 10 system uses the Asus / nVidia GTX 760 graphics card and Intel i5-2500K CPU. My graphics card claims to be of the Kepler architecture with CUDA 3.0 as shown here.

  


  Instead of going through the hassles of compiling FFMPEG with hw acceleration support i downloaded a pre-compiled binary from here and here.

  


  Next, i tried running a test with hw acceleration options as recommended here :

  


  ffmpeg -y -vsync 0 -i "input.mkv" -hwaccel cuda -hwaccel_output_format cuda -c:a copy -c:v h264_nvenc "output.mp4"


  


  I then received the error message :

  


  


  [NULL @ 000002257f4af540] Unable to find a suitable output format for 'cuda'

  


  cuda : Invalid argument

  


  


  What am i doing wrong ? For the record i install the CUDA setup file but it made no difference. I am using the latest nVidia drivers.

  


  UPDATE

  


  I modified the line to :

  


  ffmpeg -y -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i "input.mkv" -c:a copy -c:v h264_nvenc "output.mp4" 


  


  The new error message is :

  


  


  [h264_nvenc @ 00000191f5c8d400] Lossless encoding not supported

  


  [h264_nvenc @ 00000191f5c8d400] Provided device doesn't support required NVENC features Error initializing output stream 0:0 — Error
while opening encoder for output stream #0:0 - maybe incorrect
parameters such as bit_rate, rate, width or height