implement live video preview and shutter attenuation, requires gphoto2, requires graphicsmagick for photo postprocessing
This commit is contained in:
Andreas Frisch
parent
64b7702e80
commit
7ba664798e
2 changed files with 123 additions and 27 deletions
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overlay.png
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overlay.png
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Before Width: | Height: | Size: 116 KiB After Width: | Height: | Size: 125 KiB |
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@ -1,6 +1,7 @@
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#!/usr/bin/env python
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import sys, os
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import tempfile, subprocess
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import gi
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gi.require_version('Gtk', '3.0')
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gi.require_version('Gst', '1.0')
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@ -8,16 +9,28 @@ gi.require_version('GstVideo', '1.0')
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gi.require_version('GdkX11', '3.0')
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from gi.repository import Gst, GObject, Gtk, GdkX11, Gdk, GstVideo
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COUNTDOWN_SECONDS = 4
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COUNTDOWN_SECONDS = 3
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AUDIOFILE_COUNTDOWN = "beep.m4a"
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AUDIOFILE_SHUTTER = "shutter.m4a"
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#Gst.debug_set_active(True)
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#Gst.debug_set_default_threshold(3)
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class GTK_Main:
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def __init__(self):
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cmd = ['gphoto2', '--set-config=/main/capturesettings/imagequality=1']
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ret = subprocess.call(cmd)
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if ret != 0:
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exit()
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self.moviecapture = None
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tmpdir = tempfile.mkdtemp()
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self.video_pipe_name = os.path.join(tmpdir, 'videopreview')
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os.mkfifo(self.video_pipe_name)
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window = Gtk.Window(Gtk.WindowType.TOPLEVEL)
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window.set_title("Live Video Preview")
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window.set_default_size(1024, 830)
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window.set_default_size(1024, 768)
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window.connect("destroy", Gtk.main_quit, "WM destroy")
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Gtk.Window.fullscreen(window)
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@ -59,13 +72,27 @@ class GTK_Main:
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self.overlay.show_all()
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window.show_all()
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self.gst_setup_live_preview()
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self.countdown_timer = None
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self.audioplayer = Gst.Pipeline.new("audioplayer")
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self.audioplaybin = Gst.ElementFactory.make("playbin", "audioplaybin")
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self.audioplayer.add(self.audioplaybin)
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def gst_setup_live_preview(self):
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self.videoplayer = Gst.Pipeline.new("player")
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source = Gst.ElementFactory.make("videotestsrc", "file-source")
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source.set_property("pattern", 1)
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capsfilter = Gst.ElementFactory.make("capsfilter", "capsfilter")
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caps = Gst.Caps.from_string("video/x-raw, width=1024, height=768")
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capsfilter.set_property("caps", caps)
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source = Gst.ElementFactory.make("filesrc", "filesrc")
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source.set_property("location", self.video_pipe_name)
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mjpeg_filter = Gst.ElementFactory.make("capsfilter", "mjpeg_capsfilter")
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caps = Gst.Caps.from_string("image/jpeg, width=640, height=424, framerate=30/1, pixel-aspect-ratio=1/1")
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mjpeg_filter.set_property("caps", caps)
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jpegdec = Gst.ElementFactory.make("jpegdec", "jpegdec")
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video_scale = Gst.ElementFactory.make("videoscale", "videoscale")
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video_convert = Gst.ElementFactory.make("videoconvert", "video_convert")
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capsfilter = Gst.ElementFactory.make("capsfilter", "capsfilter")
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caps = Gst.Caps.from_string("video/x-raw, width=1076, height=708")
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capsfilter.set_property("caps", caps)
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png_source = Gst.ElementFactory.make("filesrc", "png-source")
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png_source.set_property("location", os.path.realpath("overlay.png"))
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@ -78,12 +105,15 @@ class GTK_Main:
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mix_convert = Gst.ElementFactory.make("videoconvert", "mix_convert")
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videosink = Gst.ElementFactory.make("xvimagesink", "video-output")
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for ele in (source, capsfilter, video_convert, png_source, png_decoder, alphacolor, png_convert, imagefreeze, mixer, mix_convert, videosink):
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for ele in (source, jpegdec, mjpeg_filter, capsfilter, video_scale, video_convert, png_source, png_decoder, alphacolor, png_convert, imagefreeze, mixer, mix_convert, videosink):
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self.videoplayer.add(ele)
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source.link(capsfilter)
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capsfilter.link(video_convert)
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video_convert.link(mixer)
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source.link(mjpeg_filter)
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mjpeg_filter.link(jpegdec)
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jpegdec.link(video_scale)
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video_scale.link(video_convert)
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video_convert.link(capsfilter)
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capsfilter.link(mixer)
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png_source.link(png_decoder)
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png_decoder.link(alphacolor)
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@ -99,23 +129,54 @@ class GTK_Main:
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bus.enable_sync_message_emission()
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bus.connect("message", self.on_message)
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bus.connect("sync-message::element", self.on_sync_message)
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self.countdown_timer = None
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self.soundplayer = Gst.Pipeline.new("soundplayer")
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self.audioplaybin = Gst.ElementFactory.make("playbin", "soundfile")
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def gst_setup_snapshot_preview(self):
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self.videoplayer = Gst.Pipeline.new("player")
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source = Gst.ElementFactory.make("filesrc", "filesrc")
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source.set_property("location", "print.jpg")
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jpegdec = Gst.ElementFactory.make("jpegdec", "jpegdec")
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imagefreeze = Gst.ElementFactory.make("imagefreeze", "imagefreeze")
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video_scale = Gst.ElementFactory.make("videoscale", "videoscale")
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video_convert = Gst.ElementFactory.make("videoconvert", "video_convert")
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capsfilter = Gst.ElementFactory.make("capsfilter", "capsfilter")
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caps = Gst.Caps.from_string("video/x-raw, width=1076, height=708")
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capsfilter.set_property("caps", caps)
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videosink = Gst.ElementFactory.make("xvimagesink", "video-output")
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for ele in (source, jpegdec, imagefreeze, capsfilter, video_scale, video_convert, videosink):
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self.videoplayer.add(ele)
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source.link(jpegdec)
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jpegdec.link(imagefreeze)
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imagefreeze.link(video_scale)
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video_scale.link(video_convert)
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video_convert.link(capsfilter)
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capsfilter.link(videosink)
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self.videoplayer.set_state(Gst.State.PLAYING)
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bus = self.videoplayer.get_bus()
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bus.add_signal_watch()
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bus.enable_sync_message_emission()
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bus.connect("message", self.on_message)
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bus.connect("sync-message::element", self.on_sync_message)
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def start_stop(self, w):
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if self.button_play.get_label() == "Start":
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self.xid = self.movie_window.get_property('window').get_xid()
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self.button_play.set_label("Stop")
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self.gst_setup_live_preview()
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if not self.moviecapture:
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video_pipe = open(self.video_pipe_name,"w+")
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print "video_pipe", video_pipe
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cmd = ['gphoto2', '--capture-movie', '--stdout']
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self.moviecapture = subprocess.Popen(cmd, stdout=video_pipe, stderr=subprocess.PIPE)
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self.videoplayer.set_state(Gst.State.PLAYING)
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else:
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print "STOPPING..."
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self.videoplayer.set_state(Gst.State.NULL)
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GObject.timeout_add(10, self.stop_capture)
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self.button_play.set_label("Start")
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def snapshot(self, widget, event):
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if event.button == 1 and self.videoplayer.get_state(0).state == Gst.State.PLAYING and not self.countdown_timer:
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self.countdown_timer = GObject.timeout_add(1000, self.countdown_cb)
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self.countdown_timer = GObject.timeout_add(100, self.countdown_cb)
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self.snapshot_label = Gtk.Label(label="SNAPSHOT!", angle=25, halign=Gtk.Align.END)
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self.snapshot_label.set_valign(Gtk.Align.CENTER)
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self.snapshot_label.set_halign(Gtk.Align.CENTER)
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@ -123,35 +184,68 @@ class GTK_Main:
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self.snapshot_label.get_style_context().add_class("snapshot_label")
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uri = 'file://'+os.path.abspath(AUDIOFILE_COUNTDOWN)
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self.audioplaybin.set_property('uri',uri)
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self.soundplayer.add(self.audioplaybin)
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self.soundplayer.set_state(Gst.State.PLAYING)
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self.audioplayer.set_state(Gst.State.PLAYING)
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self.overlay.add_overlay(self.snapshot_label)
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self.overlay.show_all()
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self.counter = COUNTDOWN_SECONDS
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self.counter = COUNTDOWN_SECONDS*10
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def countdown_cb(self):
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self.counter -= 1
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self.snapshot_label.set_text("SNAP IN %i" % self.counter)
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if self.counter == 0:
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self.countdown_timer = None
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self.overlay.remove(self.snapshot_label)
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self.snap()
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return False
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self.snapshot_label.set_text("SNAP IN %i" % self.counter)
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return True
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def snap(self):
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print "TAKE SNAPSHOT!"
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self.countdown_timer = None
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self.soundplayer.set_state(Gst.State.READY)
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print "TAKE SNAPSHOT!", self.counter
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self.moviecapture.terminate()
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out,err = self.moviecapture.communicate()
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self.moviecapture = None
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print "video capture terminated", out, err, self.counter
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cmd = ['gphoto2', '--capture-image-and-download', '--force-overwrite']
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photocapture = subprocess.Popen(cmd)
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print "snashop taken", self.counter, out, err
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self.audioplayer.set_state(Gst.State.READY)
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uri = 'file://'+os.path.abspath(AUDIOFILE_SHUTTER)
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self.audioplaybin.set_property('uri',uri)
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self.soundplayer.set_state(Gst.State.PLAYING)
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self.overlay.remove(self.snapshot_label)
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self.audioplayer.set_state(Gst.State.PLAYING)
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out,err = photocapture.communicate()
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self.videoplayer.set_state(Gst.State.NULL)
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cmd = ['gm', 'mogrify', '-resize', '2152x1417!', 'capt0000.jpg']
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print "execute", cmd
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subprocess.call(cmd)
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cmd = ['gm', 'composite', '-compose', 'Over', 'overlay_print.png', 'capt0000.jpg', 'print.jpg']
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print "execute", cmd
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subprocess.call(cmd)
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self.audioplayer.set_state(Gst.State.READY)
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self.gst_setup_snapshot_preview()
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def exit(self, widget, data=None):
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def exit(self, widget=None, data=None):
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print "EXIT"
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self.stop_capture()
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os.unlink(self.video_pipe_name)
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Gtk.main_quit()
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def stop_capture(self):
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if self.moviecapture:
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print "stop_capture...", self.moviecapture
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self.moviecapture.terminate()
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print "terminated...", self.moviecapture
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video_pipe = open(self.video_pipe_name,"w+")
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print "video_pipe=", video_pipe
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#self.moviecapture.communicate()
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bla = video_pipe.read(1)
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print "bla=", bla
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self.moviecapture = None
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return False
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def on_message(self, bus, message):
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t = message.type
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if t == Gst.MessageType.EOS:
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print "EOS!"
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self.videoplayer.set_state(Gst.State.NULL)
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self.button_play.set_label("Start")
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elif t == Gst.MessageType.ERROR:
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@ -159,6 +253,8 @@ class GTK_Main:
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print "Error: %s" % err, debug
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self.videoplayer.set_state(Gst.State.NULL)
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self.button_play.set_label("Start")
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#else:
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#print "on_message", message, message.type
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def on_sync_message(self, bus, message):
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struct = message.get_structure()
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