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POGstreamer webcam video feed in tkinter
 

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    <p>I'm writing a program to get a video feed from a web cam and display it in a Tkinter window. I wrote the following code which I ran on Ubuntu 12.04.</p> <pre><code>#!/usr/bin/env python import sys, os, gobject from Tkinter import * import pygst pygst.require("0.10") import gst # Goto GUI Class class Prototype(Frame): def __init__(self, parent): gobject.threads_init() Frame.__init__(self, parent) # Parent Object self.parent = parent self.parent.title("WebCam") self.parent.geometry("640x560+0+0") self.parent.resizable(width=FALSE, height=FALSE) # Video Box self.movie_window = Canvas(self, width=640, height=480, bg="black") self.movie_window.pack(side=TOP, expand=YES, fill=BOTH) # Buttons Box self.ButtonBox = Frame(self, relief=RAISED, borderwidth=1) self.ButtonBox.pack(side=BOTTOM, expand=YES, fill=BOTH) self.closeButton = Button(self.ButtonBox, text="Close", command=self.quit) self.closeButton.pack(side=RIGHT, padx=5, pady=5) gotoButton = Button(self.ButtonBox, text="Start", command=self.start_stop) gotoButton.pack(side=RIGHT, padx=5, pady=5) # Set up the gstreamer pipeline self.player = gst.parse_launch ("v4l2src ! video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! xvimagesink") bus = self.player.get_bus() bus.add_signal_watch() bus.enable_sync_message_emission() bus.connect("message", self.on_message) bus.connect("sync-message::element", self.on_sync_message) def start_stop(self): if self.gotoButton["text"] == "Start": self.gotoButton["text"] = "Stop" self.player.set_state(gst.STATE_PLAYING) else: self.player.set_state(gst.STATE_NULL) self.gotoButton["text"] = "Start" def on_message(self, bus, message): t = message.type if t == gst.MESSAGE_EOS: self.player.set_state(gst.STATE_NULL) self.button.set_label("Start") elif t == gst.MESSAGE_ERROR: err, debug = message.parse_error() print "Error: %s" % err, debug self.player.set_state(gst.STATE_NULL) self.button.set_label("Start") def on_sync_message(self, bus, message): if message.structure is None: return message_name = message.structure.get_name() if message_name == "prepare-xwindow-id": # Assign the viewport imagesink = message.src imagesink.set_property("force-aspect-ratio", True) imagesink.set_xwindow_id(self.movie_window.window.xid) def main(): root = Tk() app = Prototype(root) app.pack(expand=YES, fill=BOTH) root.mainloop() if __name__ == '__main__': main() </code></pre> <p>My problem is neither the ButtonBox nor the VideoBox show in the output window when the program is running. How can I fix this? I did look at other sites for possible solutions (for instance <a href="http://pygstdocs.berlios.de/#projects" rel="nofollow noreferrer">http://pygstdocs.berlios.de/#projects</a> or <a href="https://stackoverflow.com/questions/7227162/way-to-play-video-files-in-tkinter">Way to play video files in Tkinter?</a>) however they have very limited information on what their code means.</p> <p>After making the suggested alteration and a few others to get the buttons working, I realize that the display window is different from the main window when I run the program. Is there a way to get the video to display in the main window when using tkinter??</p>
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