Class: Lolcommits::CaptureLinux
- Defined in:
- lib/lolcommits/capturer/capture_linux.rb
Constant Summary collapse
- MPLAYER_FPS =
25
Instance Attribute Summary
Attributes inherited from Capturer
#animated_duration, #capture_delay, #capture_device, #frames_location, #snapshot_location, #video_location
Instance Method Summary collapse
Methods inherited from Capturer
Constructor Details
This class inherits a constructor from Lolcommits::Capturer
Instance Method Details
#capture ⇒ Object
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# File 'lib/lolcommits/capturer/capture_linux.rb', line 10 def capture debug 'LinuxCapturer: making tmp directory' tmpdir = Dir.mktmpdir # Default delay is 1s delay = capture_delay != 0 ? capture_delay : 1 # There's no way to give a capture delay in mplayer, but a number of frame # mplayer's "delay" is actually a number of frames at 25 fps # multiply the set value (in seconds) by 25 frames = delay.to_i * MPLAYER_FPS debug 'LinuxCapturer: calling out to mplayer to capture image' # mplayer's output is ugly and useless, let's throw it away _stdin, stdout, _stderr = Open3.popen3("mplayer -vo jpeg:outdir=#{tmpdir} #{capture_device_string} -frames #{frames} -fps #{MPLAYER_FPS} tv://") # looks like we still need to read the output for something to happen stdout.read debug 'LinuxCapturer: calling out to mplayer to capture image' # get last frame from tmpdir (regardless of fps) all_frames = Dir.glob("#{tmpdir}/*.jpg").sort_by do |f| File.mtime(f) end if all_frames.empty? debug 'LinuxCapturer: failed to capture any image' else FileUtils.mv(all_frames.last, snapshot_location) debug 'LinuxCapturer: cleaning up' end FileUtils.rm_rf(tmpdir) end |
#capture_device_string ⇒ Object
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# File 'lib/lolcommits/capturer/capture_linux.rb', line 6 def capture_device_string @capture_device.nil? ? nil : "-tv device=\"#{@capture_device}\"" end |