Recherche avancée

Sur d’autres sites (5348)

• Video out of LinkedList sequence

  14 janvier 2020, par Marks Gniteckis

  I just started working on a side project to learn JavaFX 13 and the idea is to play a sequence of frames like a video without saving the actual video or frames in temp folders. I’d like to buffer images and output them onto ImageView at 30fps. Here is what I’ve got so far :

  The method that buffers images -

  @FXML void takeVideo(ActionEvent event)
  
              throws InterruptedException {
  
          model.purgeBufferedVideo();
  
          Timer timer = new Timer();
  
          long startedAt = System.currentTimeMillis();
  
          TimerTask task = new TimerTask() {
  
              @Override public void run() {
  
                  while (System.currentTimeMillis() < startedAt + (1000 * Long.parseLong(s.getText()))) {
  
                      generateVideo(new Rectangle(Toolkit.getDefaultToolkit()
  
                              .getScreenSize()));
  
                      System.out.println(System.currentTimeMillis() != startedAt + (1000 * Long
  
                              .parseLong(s.getText())));
  
                  }
  
                  cancel();
  
                  System.out.println("Video buffered");
  
              }
  
          };
  
          timer.schedule(task, 0L);
  
      }

  Method to output images onto ImageView -

  @FXML void playVideo(ActionEvent event) {
  
          model.getBufferedVideo().forEach(i -> {
  
  
  
              try {
  
                  preview.setImage(i);
  
                  Thread.sleep((60000 / Long.parseLong(s.getText()))/30);
  
                  preview.setImage(i);
  
              } catch (InterruptedException e) {
  
                  e.printStackTrace();
  
              }
  
          });
  
      }

  List population is working but only last image in the list is displayed in the ImageView and I can’t really get my head around why... Thanks in advance to everyone !

• How to export audio from a iPhone video file with FFmpeg ?

  11 janvier 2020, par DanScripter

  UPDATE 1 the problem resides in the input read-stream. (check below)

  I am using fluent-ffmpeg (version : 2.1.2) to get a .mp3 file out of a video file that I input as a stream .createReadStream(). I output the file as a .pipe to a remoteWriteStream.

  ffmpeg -i pipe:0 -vn -f mp3 -acodec mp3 -movflags frag_keyframe+empty_moov pipe:1

  This works fine with .mp4, .webm and .mov (codec : prores) files.

  But it somehow does not want to work with a .mov out of an iPhone 11. FFmpeg is not giving me any error when running above code. It creates the .mp3 file but the size is just 152 B and it is not playable.

  I ffprobed the iPhone .mov files it returns this :

  "{ streams: 
  
     [ { index: 0,
  
         codec_name: 'hevc',
  
         codec_long_name: 'H.265 / HEVC (High Efficiency Video Coding)',
  
         profile: 'Main',
  
         codec_type: 'video',
  
         codec_time_base: '1111/33300',
  
         codec_tag_string: 'hvc1',
  
         codec_tag: '0x31637668',
  
         width: 1920,
  
         height: 1080,
  
         coded_width: 1920,
  
         coded_height: 1088,
  
         has_b_frames: 2,
  
         sample_aspect_ratio: '0:1',
  
         display_aspect_ratio: '0:1',
  
         pix_fmt: 'yuv420p',
  
         level: 120,
  
         color_range: 'tv',
  
         color_space: 'bt709',
  
         color_transfer: 'bt709',
  
         color_primaries: 'bt709',
  
         chroma_location: 'unspecified',
  
         field_order: 'unknown',
  
         timecode: 'N/A',
  
         refs: 1,
  
         id: 'N/A',
  
         r_frame_rate: '30000/1001',
  
         avg_frame_rate: '33300/1111',
  
         time_base: '1/600',
  
         start_pts: 'N/A',
  
         start_time: 'N/A',
  
         duration_ts: 6666,
  
         duration: 11.11,
  
         bit_rate: 7611708,
  
         max_bit_rate: 'N/A',
  
         bits_per_raw_sample: 'N/A',
  
         nb_frames: 333,
  
         nb_read_frames: 'N/A',
  
         nb_read_packets: 'N/A',
  
         tags: [Object],
  
         disposition: [Object] },
  
       { index: 1,
  
         codec_name: 'aac',
  
         codec_long_name: 'AAC (Advanced Audio Coding)',
  
         profile: 'unknown',
  
         codec_type: 'audio',
  
         codec_time_base: '1/44100',
  
         codec_tag_string: 'mp4a',
  
         codec_tag: '0x6134706d',
  
         sample_fmt: 'fltp',
  
         sample_rate: 44100,
  
         channels: 2,
  
         channel_layout: 'stereo',
  
         bits_per_sample: 0,
  
         id: 'N/A',
  
         r_frame_rate: '0/0',
  
         avg_frame_rate: '0/0',
  
         time_base: '1/44100',
  
         start_pts: 'N/A',
  
         start_time: 'N/A',
  
         duration_ts: 489951,
  
         duration: 11.11,
  
         bit_rate: 135091,
  
         max_bit_rate: 192000,
  
         bits_per_raw_sample: 'N/A',
  
         nb_frames: 481,
  
         nb_read_frames: 'N/A',
  
         nb_read_packets: 'N/A',
  
         tags: [Object],
  
         disposition: [Object] },
  
       { index: 2,
  
         codec_name: 'unknown',
  
         codec_long_name: 'unknown',
  
         profile: 'unknown',
  
         codec_type: 'data',
  
         codec_tag_string: 'mebx',
  
         codec_tag: '0x7862656d',
  
         id: 'N/A',
  
         r_frame_rate: '0/0',
  
         avg_frame_rate: '0/0',
  
         time_base: '1/600',
  
         start_pts: 'N/A',
  
         start_time: 'N/A',
  
         duration_ts: 6666,
  
         duration: 11.11,
  
         bit_rate: 2670,
  
         max_bit_rate: 'N/A',
  
         bits_per_raw_sample: 'N/A',
  
         nb_frames: 38,
  
         nb_read_frames: 'N/A',
  
         nb_read_packets: 'N/A',
  
         tags: [Object],
  
         disposition: [Object] },
  
       { index: 3,
  
         codec_name: 'unknown',
  
         codec_long_name: 'unknown',
  
         profile: 'unknown',
  
         codec_type: 'data',
  
         codec_tag_string: 'mebx',
  
         codec_tag: '0x7862656d',
  
         id: 'N/A',
  
         r_frame_rate: '0/0',
  
         avg_frame_rate: '0/0',
  
         time_base: '1/600',
  
         start_pts: 'N/A',
  
         start_time: 'N/A',
  
         duration_ts: 6666,
  
         duration: 11.11,
  
         bit_rate: 7,
  
         max_bit_rate: 'N/A',
  
         bits_per_raw_sample: 'N/A',
  
         nb_frames: 1,
  
         nb_read_frames: 'N/A',
  
         nb_read_packets: 'N/A',
  
         tags: [Object],
  
         disposition: [Object] },
  
       { index: 4,
  
         codec_name: 'unknown',
  
         codec_long_name: 'unknown',
  
         profile: 'unknown',
  
         codec_type: 'data',
  
         codec_tag_string: 'mebx',
  
         codec_tag: '0x7862656d',
  
         id: 'N/A',
  
         r_frame_rate: '0/0',
  
         avg_frame_rate: '0/0',
  
         time_base: '1/600',
  
         start_pts: 'N/A',
  
         start_time: 'N/A',
  
         duration_ts: 6666,
  
         duration: 11.11,
  
         bit_rate: 18117,
  
         max_bit_rate: 'N/A',
  
         bits_per_raw_sample: 'N/A',
  
         nb_frames: 333,
  
         nb_read_frames: 'N/A',
  
         nb_read_packets: 'N/A',
  
         tags: [Object],
  
         disposition: [Object] } ],
  
    format: 
  
     { filename: 'pipe:0',
  
       nb_streams: 5,
  
       nb_programs: 0,
  
       format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
  
       format_long_name: 'QuickTime / MOV',
  
       start_time: 'N/A',
  
       duration: 11.11,
  
       size: 'N/A',
  
       bit_rate: 'N/A',
  
       probe_score: 100,
  
       tags: 
  
        { major_brand: 'qt  ',
  
          minor_version: '0',
  
          compatible_brands: 'qt  ',
  
          creation_time: '2020-01-11T12:33:36.000000Z',
  
          'com.apple.quicktime.make': 'Apple',
  
          'com.apple.quicktime.model': 'iPhone 11',
  
          'com.apple.quicktime.software': '13.3',
  
          'com.apple.quicktime.creationdate': '2020-01-11T13:33:36+0100' } },
  
    chapters: [] }" 

  The created .mp3 file results in a undefined.

  I already tried to take the .mov re-encode it to an .mp4 via ffmpeg and then try the above code to get the .mp3 - still does not work.

  Any advice how I can make this work ?

  thanks !

  ---

  UPDATE 1
  The problem resides in the input stream ! When I download the file to the local machine and input it as as a local file, not as a read stream, it works perfectly.

  I am creating the stream from a google cloud bucket like this :

  const myBucket = storage.bucket('myBucket');
  
  const remoteReadStream = myBucket.file(file).createReadStream();

  Since this code is perfectly working with all other codecs, what maybe the issue while creating the read stream from the google cloud from a h265 file ?

• vf_dnn_processing : remove parameter 'fmt'

  27 décembre 2019, par Guo, Yejun

  vf_dnn_processing : remove parameter 'fmt'
  do not request AVFrame's format in vf_ddn_processing with 'fmt',
  
  but to add another filter for the format.
  command examples :
  
  ./ffmpeg -i input.jpg -vf format=bgr24,dnn_processing=model=halve_first_channel.model:input=dnn_in:output=dnn_out:dnn_backend=native -y out.native.png
  
  ./ffmpeg -i input.jpg -vf format=rgb24,dnn_processing=model=halve_first_channel.model:input=dnn_in:output=dnn_out:dnn_backend=native -y out.native.png
  Signed-off-by : Guo, Yejun <yejun.guo@intel.com>
  
  Signed-off-by : Pedro Arthur <bygrandao@gmail.com>
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/vf_dnn_processing.c