Recherche avancée

Sur d’autres sites (11963)

• How to buffer videojs so preload won't show ?

  9 septembre 2015, par toy

  I’m building video cutting tool using videojs. In order to give the feedback to user right away instead of using ffmpeg to merge the video right away. I just swap the videos instead. However, during the swapping you would see the loading icon when the second video is being loaded. Is there any tricks that would tell videojs to load the video before so when the video plays it would just play right away.

  http://jsfiddle.net/noppanit/odwqqoss/2/

  Here’s my code

  <div>
  
      <video preload="auto" class="vjs-tech" src="http://www.w3schools.com/html/mov_bbb.mp4">
  
          <source src="http://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4">
  
      </source></video>
  
  </div>
  
  <div>
  
      <div>
  
          <label>From</label>
  
          <input type="text" class="start-time" />
  
      </div>
  
      <div>
  
          <label>To</label>
  
          <input type="text" class="stop-time" />
  
      </div>
  
      <div>
  
          <input type="button" value="Select" />
  
      </div>
  
  </div>
  
  <div>
  
      <video preload="auto" class="vjs-tech" src="http://www.w3schools.com/html/mov_bbb.mp4">
  
          <source src="http://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4">
  
      </source></video>
  
  </div>
  
  <div>
  
      <div>
  
          <label>From</label>
  
          <input type="text" class="start-time-video1" />
  
      </div>
  
      <div>
  
          <label>To</label>
  
          <input type="text" class="stop-time-video1" />
  
      </div>
  
      <div>
  
          <input type="button" value="Select" />
  
      </div>
  
  </div>
  
  <div>
  
      <input type="button" value="Cut!" />
  
  </div>
  
  <div></div>
  
  
  
  
  
  
  
  
  
      (function ($) {
  
      $('#cut-video').on('click', function () {
  
          var video = videojs("example_video_1");
  
          var startTime = $('.start-time');
  
          var stopTime = $('.stop-time');
  
          video.currentTime(startTime.val());
  
          video.play();
  
          video.on('timeupdate', function (e) {
  
              if (video.currentTime() >= stopTime.val()) {
  
                  video.pause();
  
              }
  
          });
  
  
  
      });
  
  
  
      $('#cut-video1').on('click', function () {
  
          var video = videojs("example_video_2");
  
          var startTime = $('.start-time-video1');
  
          var stopTime = $('.stop-time-video1');
  
          video.currentTime(startTime.val());
  
          video.play();
  
          video.on('timeupdate', function (e) {
  
              if (video.currentTime() >= stopTime.val()) {
  
                  video.pause();
  
              }
  
          });
  
      });
  
  
  
      $('#cut').on('click', function () {
  
          var video = $('<video></video>');
  
          video.attr('id', 'result1');
  
          video.addClass('video-js vjs-default-skin');
  
          video.attr('width', 300);
  
  
  
          var source = $('<source></source>');
  
          source.attr('src', 'http://www.w3schools.com/html/mov_bbb.mp4');
  
          source.attr('type', 'video/mp4');
  
  
  
          video.append(source);
  
          $('#result').append(video);
  
  
  
          var player = videojs("result1");
  
          var startTime = $('.start-time');
  
          var stopTime = $('.stop-time');
  
  
  
          player.currentTime(startTime.val());
  
          player.play();
  
  
  
          player.on('timeupdate', function (e) {
  
              if (player.currentTime() >= stopTime.val()) {
  
                  player.src({
  
                      "type": "video/mp4",
  
                      src: 'http://www.w3schools.com/html/mov_bbb.mp4'
  
                  });
  
                  var startTime1 = $('.start-time-video1');
  
                  var stopTime1 = $('.stop-time-video1');
  
  
  
                  player.currentTime(startTime1.val());
  
                  player.play();
  
                  player.on('timeupdate', function (e1) {
  
                      if (player.currentTime() >= stopTime1.val()) {
  
                          player.pause();
  
                      }
  
                  });
  
              }
  
          });
  
  
  
  
  
  
  
  
  
      });
  
  
  
  })(jQuery);

• x264 Downsides of a high CRF (22) intermediary codec between conversions instead of lossless

  18 décembre 2019, par bobtheencoder

  I have a huge collection of video files that are in the range of CRF 16-20 taking up TB’s of space. The only need I have for these originals is that I have to encode them from time to time but the CRF of these final encodes is very low (CRF 26-28).

  I understand that a lossy to lossy converstion ALWAYS results in some quality loss but my question is what if the intermediate file is almost visually lossless compared to the final output.

  So to sum up, what quality difference should I expect from the following routes ?

  CRF 18 (original) -----> CRF 28 (final)
  
  CRF 18 (original) -----> CRF 22 (long-term storage) -----> Lossy  CRF 28 (final)

• Issue in FFmpegAndroid library when i compress video it convert video time into 1 or 2 second

  25 mai 2017, par Fateh Singh Saini

  Used this dependencies :
  compile ’com.writingminds:FFmpegAndroid:0.3.2’

  I used blow code for video compress
  public static final String VIDEOCODEC = "-vcodec" ;
  public static final String AUDIOCODEC = "-acodec" ;

  public static final String VIDEOBITSTREAMFILTER = "-vbsf";
  
  public static final String AUDIOBITSTREAMFILTER = "-absf";
  
  
  
  public static final String VERBOSITY = "-v";
  
  public static final String FILE_INPUT = "-i";
  
  public static final String SIZE = "-s";
  
  public static final String FRAMERATE = "-r";
  
  public static final String FORMAT = "-f";
  
  public static final String BITRATE_VIDEO = "-b:v";
  
  
  
  public static final String BITRATE_AUDIO = "-b:a";
  
  public static final String CHANNELS_AUDIO = "-ac";
  
  public static final String FREQ_AUDIO = "-ar";

  String[] complexCommand = "-y", FILE_INPUT, yourRealPath, SIZE, "480x360", FRAMERATE, "25", VIDEOCODEC, "mpeg4", BITRATE_VIDEO, "150k", BITRATE_AUDIO, "48000", CHANNELS_AUDIO, "2", FREQ_AUDIO, "22050", filePath ;

  /**
  
   * Executing ffmpeg binary
  
   */
  
  private static String execFFmpegBinary(final String[] command) {
  
  
  
  
  
      try {
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
              @Override
  
              public void onFailure(String s) {
  
                  Log.d(TAG, "FAILED with output : " + s);
  
              }
  
  
  
              @Override
  
              public void onSuccess(String s) {
  
                  Log.d(TAG, "SUCCESS with output : " + s);
  
              }
  
  
  
              @Override
  
              public void onProgress(String s) {
  
                  Log.d(TAG, "Started command : ffmpeg " + command);
  
                  Log.d(TAG, "progress : " + s);
  
              }
  
  
  
              @Override
  
              public void onStart() {
  
                  Log.d(TAG, "Started command : ffmpeg " + command);
  
              }
  
  
  
              @Override
  
              public void onFinish() {
  
                  Log.d(TAG, "Finished command : ffmpeg " + command);
  
  
  
              }
  
          });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
          // do nothing for now
  
      }
  
      return filePath;
  
  }