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• avcodec/nvenc : add UHQ to AV1 for NVENC

  8 janvier, par Diego de Souza

  avcodec/nvenc : add UHQ to AV1 for NVENC
  This commit adds support for Ultra High Quality mode for AV1 on
  
  NVIDIA GPUs.
  Signed-off-by : Diego de Souza <ddesouza@nvidia.com>
  
  Signed-off-by : Timo Rothenpieler <timo@rothenpieler.org>
  

  • [DH] libavcodec/nvenc.h
  • [DH] libavcodec/nvenc_av1.c

• ffmpeg livestream from static image and audio

  23 mai 2017, par boygiandi

  I’m trying to livestream by ffmpeg using static image and audio file. The ffmpeg command like this

  ffmpeg -re -loop 1 -f image2 -i ’/tmp/11.jpg’ -f lavfi -i amovie=/tmp/5117.mp3:loop=999 -video_size 600x480 -c:v libx264 -x264-params keyint=60 -bufsize 500k -c:a aac -ar 44100 -b:a 128k -r 30 -g 60 -pix_fmt yuv420p -f flv "rtmp ://"

  /tmp/11.jpg was generated by another process and keep updated twice per second. The ffmpeg command doesn’t look right, first, it show status like this

  frame= 85 fps=9.4 q=29.0 size= 2261kB time=00:02:24.19 bitrate= 128.4kbits/s speed= 16x

  As you see, 16x is not good, 1x is the right value for livestream. Then, after a while, it show many warning log like this

  [flv @ 0x322bd60] Non-monotonous DTS in output stream 0:1 ; previous : 335993, current : 297752 ; changing to 335993. This may result in incorrect timestamps in the output file.

  Please help to fix it.

• How to convert video file to audio file by using FFMPEG ?

  15 janvier 2020, par Aamir Naseer

  I’m making video to audio converter app but need help to convert video to audio using ffmpeg. I checked many answers and websites but their answers are not easy to understand and I’m confused with command that is used to convert. What is the proper command to convert video to audio and is I’m executing the command in right way ?

  public class VideoConvertActivity extends AppCompatActivity {
  
  
  
      private VideoView videoView;
  
      private Button convertButton;
  
      private String filePath;
  
      private FFmpeg ffmpeg;
  
  
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_video_convert);
  
  
  
          videoView = findViewById(R.id.videoviewID);
  
          convertButton = findViewById(R.id.convertbuttonID);
  
  
  
          ffmpeg = FFmpeg.getInstance(VideoConvertActivity.this);
  
  
  
  // in variable video i'm getting the path of video path from previous activity through intent and that video will have to convert to audio file
  
          Intent extras = getIntent();
  
          final String video = extras.getStringExtra("video");
  
  
  
          videoView.setVideoPath(video);
  
          videoView.start();
  
  
  
          convertButton.setOnClickListener(new View.OnClickListener() {
  
              @Override
  
              public void onClick(View v) {
  
  
  
                  try {
  
  
  
                      File moviesDir = Environment.getExternalStoragePublicDirectory(
  
                              Environment.DIRECTORY_MUSIC
  
                      );
  
  
  
                      String filePrefix = "convert_audio";
  
                      String fileExtn = ".mp3";
  
                      File dest = new File(moviesDir, filePrefix + fileExtn);
  
  
  
                      int fileNo = 0;
  
                      while (dest.exists()) {
  
                          fileNo++;
  
                          dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
  
                      }
  
                      filePath = dest.getAbsolutePath();
  
  
  
                      // to execute "ffmpeg -version" command you just need to pass "-version"
  
                      String[] command = {"-y", "-i", video, "-vn", "-ar", "44100", "-ac", "2", "-b:a", "256k", "-f", "mp3", filePath};
  
                      ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
  
  
                          @Override
  
                          public void onStart() {
  
                              Toast.makeText(VideoConvertActivity.this,"Started",Toast.LENGTH_LONG).show();
  
                          }
  
  
  
                          @Override
  
                          public void onProgress(String message) {
  
                              Toast.makeText(VideoConvertActivity.this,"Progress",Toast.LENGTH_LONG).show();
  
                          }
  
  
  
                          @Override
  
                          public void onFailure(String message) {
  
                              Toast.makeText(VideoConvertActivity.this,"Failed",Toast.LENGTH_LONG).show();
  
                          }
  
  
  
                          @Override
  
                          public void onSuccess(String message) {
  
                              Toast.makeText(VideoConvertActivity.this,"Succeed",Toast.LENGTH_LONG).show();
  
                          }
  
  
  
                          @Override
  
                          public void onFinish() {
  
                              Toast.makeText(VideoConvertActivity.this,"Finished",Toast.LENGTH_LONG).show();
  
                          }
  
                      });
  
                  } catch (FFmpegCommandAlreadyRunningException e) {
  
                      // Handle if FFmpeg is already running
  
                  }
  
  
  
                   Toast.makeText(VideoConvertActivity.this,"Converted Successfully",Toast.LENGTH_SHORT).show();
  
  
  
              }
  
          });
  
  
  
      }
  
  
  
  }