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• Merge commit ’8ddfa5ae5ef64a25dd087d74954ebdb9081f0d67’

  31 mars 2017, par James Almer

  Merge commit ’8ddfa5ae5ef64a25dd087d74954ebdb9081f0d67’
  * commit ’8ddfa5ae5ef64a25dd087d74954ebdb9081f0d67’ :
  
    vf_drawtext : Drop wrong void* cast
  This commit is a noop, see 4c96985af1b8870482b6b6ef9120960633f62cee
  Merged-by : James Almer <jamrial@gmail.com>
  

• Headless Selenium not Recording Video

  12 mai 2015, par TIMBERings

  I’m using the Headless gem to create a headless session using xvfb and to record the session using ffmpeg. I’m not able to save the video created by the headless gem. I’m including the relevant snippets of my code and the output.

  Code

  $LOGGER.info("----------Starting test: #{@test_name}----------")
  
  
  
  if Utilities.linux? && ENV['DRIVER'] != 'sauce'
  
    @headless = Headless.new ({dimension: '1600x1200x16',
  
                      pid_file_path: "#{Utilities.get_root_directory}/tmp/headless_ffmpeg_#{@display}.pid",
  
                      tmp_file_path: "#{Utilities.get_root_directory}/tmp/headless_ffmpeg_#{@display}.mov",
  
                      log_file_path: "#{Utilities.get_root_directory}/tmp/headless_ffmpeg_#{@display}.txt"})
  
    @headless.start
  
    @headless.video.start_capture
  
    $LOGGER.info 'Creating headless session.'
  
  end
  
  $browser = DefaultWatir.initiate_browser(@test_name)
  
  
  
  if Utilities.linux? && ENV['DRIVER'] != 'sauce'
  
    $LOGGER.info "Starting video recording"
  
    @headless.video.start_capture
  
  end
  
  
  
  .........          .........
  
  ......... TEST RUN .........
  
  .........          .........
  
  
  
  $LOGGER.info "----------Ending test: #{@test_name}----------"
  
   puts "\n\n"
  
  
  
  $browser.close if $browser
  
  save_video if @headless
  
  
  
  def video_path
  
    return "#{Utilities.get_root_directory}/video/#{@test_name}_#{Time.now.to_s.gsub(' ', '-')}"
  
  end
  
  
  
  def save_video
  
    if Utilities.linux?  && ENV['DRIVER'] != 'sauce'
  
      unless self.instance_variable_get(:@exception).nil? && !$has_errors
  
        saved_video_path = video_path
  
        Dir.mkdir("#{Utilities.get_root_directory}/video") unless Dir.exists?("#{Utilities.get_root_directory}/video")
  
        $LOGGER.info "Video path = #{saved_video_path}"
  
        begin
  
          $LOGGER.info 'before save'
  
          @headless.video.stop_and_save(saved_video_path)
  
          $LOGGER.info 'after save'
  
        rescue ex
  
          $LOGGER.info 'Video save had exception.'
  
          puts ex.message
  
          puts ex.backtrace.join("\n\t")
  
        end
  
        $LOGGER.info "Video saved at: #{saved_video_path}"
  
      else
  
        @headless.video.stop_and_discard
  
      end
  
      @headless.destroy
  
    end
  
  end

  Output

  [INFO - 2015-03-06 21:58:37 +0000] - ----------Starting test : Example Test----------

  [INFO - 2015-03-06 21:58:37 +0000] - Creating headless session.

  [INFO - 2015-03-06 21:58:40 +0000] - Starting video recording

  [INFO - 2015-03-06 22:02:04 +0000] - ----------Ending test : Example Test----------

  INFO - 2015-03-06 22:02:05 +0000] - Video path = /var/lib/jenkins/workspace/end_to_end_firefox/selenium-tests/video/PoolPlayToSingleEliminationOneDivision_2015-03-06-22:02:05-+0000

  [INFO - 2015-03-06 22:02:05 +0000] - before save

  [INFO - 2015-03-06 22:02:05 +0000] - after save

  [INFO - 2015-03-06 22:02:05 +0000] - Video saved at : /var/lib/jenkins/workspace/end_to_end_firefox/selenium-tests/video/PoolPlayToSingleEliminationOneDivision_2015-03-06-22:02:05-+0000

• Set RTSP/UDP buffer size in FFmpeg

  16 mars 2015, par chuckleplant

  Note : I’m aware ffmpeg and libav are different libraries. This is a problem common to both.

  Disclaimer : Duplicate of SO question marked as answered but actually didn’t give a proper solution.

  ---

  Insufficient UDP buffer size causes broken streams for several high resolution video streams. In LibAV/FFMPEG it’s possible to set the udp buffer size for udp urls (udp ://...) by appending some options to it.

  However, for RTSP urls this is not supported. These are the only solutions I’ve found :

  • Rebuilding ffmpeg/libav changing the UDP_MAX_PKT_SIZE in the udp.c source file.
  • Using a nasty hack to find the required value.
  • Using a different decoding library (proposed solution to aforementioned related SO question).

  None of these is actually a solution. From what I found it should be possible to use the API’s AVOptions to find and set this value. Or else, the AVDictionary.

  It’s very difficult to find how to set these throughout the documentation of either libav or ffmpeg.