Pre Roll Screen?

Your channel will exit anytime you close all of its screens. viewtopic.php?f=34&t=33895&p=216863#p216863

Okay. I've added the code and it seems to start loading the main screen but it's stuck at "Retrieving".. My code is below:

'********************************************************************
'**  Video Player Example Application - Main
'**  November 2009
'**  Copyright (c) 2009 Roku Inc. All Rights Reserved.
'********************************************************************
Function ShowPreRoll(video)
   ' a true result indicates that playback finished without user intervention
   ' a false result indicates that the user pressed UP or BACK to terminate playback
   CanvasPreroll=CreateObject("roImageCanvas")
   
   Port=CreateObject("roMessagePort")
   
   CanvasPreroll.SetMessagePort(Port)
   ' build a very simple buffer screen for our preroll video
   CanvasPreroll.SetLayer()
   canvas.Close()
End Function

Sub Main()
	
    'initialize theme attributes like titles, logos and overhang color
    initTheme()
	preroll = {
	    streamFormat: "mp4"
	    stream: {
	      url:  "http://www.archive.org/download/kelloggs_variety_pak/kelloggs_variety_pak_512kb.mp4"
	    }
	  }
	screenFacade = CreateObject("roPosterScreen")
    screenFacade.show()
	ShowVideoScreen(preroll)
    screen=preShowHomeScreen("", "")
    'set to go, time to get started
	if screen=invalid then
        print "unexpected error in preShowHomeScreen"
        return
    end if
	screenFacade.showMessage("")
	showHomeScreen(screen)
    sleep(3500)
End Sub


'*************************************************************
'** Set the configurable theme attributes for the application
'** 
'** Configure the custom overhang and Logo attributes
'** Theme attributes affect the branding of the application
'** and are artwork, colors and offsets specific to the app
'*************************************************************

Sub initTheme()

    app = CreateObject("roAppManager")
    theme = CreateObject("roAssociativeArray")

    theme.OverhangOffsetSD_X = "72"
    theme.OverhangOffsetSD_Y = "31"
    theme.OverhangSliceSD = "pkg:/images/Overhang_Background_SD.png"
    theme.OverhangLogoSD  = "pkg:/images/Overhang_Logo_SD.png"

    theme.OverhangOffsetHD_X = "125"
    theme.OverhangOffsetHD_Y = "35"
    theme.OverhangSliceHD = "pkg:/images/Overhang_Background_HD.png"
    theme.OverhangLogoHD  = "pkg:/images/Overhang_Logo_HD.png"
	theme.BackgroundColor = "#FFFFFF"
    app.SetTheme(theme)

End Sub

Im using the videoplayer template. Should the facade go in the function?

I've simplified this even further.. The video is laying but it's still exiting the channel. I tried using the facade at different points and it always gives me some sort of error. appMain.brs is below.

'********************************************************************
'**  Video Player Example Application - Main
'**  November 2009
'**  Copyright (c) 2009 Roku Inc. All Rights Reserved.
'********************************************************************
Sub RunUserInterface()
screenFacade = CreateObject("roPosterScreen")
canvas = CreateObject("roVideoScreen")
canvas.SetContent({
    Title: "My Video"
    StreamFormat: "mp4"
    Stream: { URL: "http://www.archive.org/download/kelloggs_variety_pak/kelloggs_variety_pak_512kb.mp4"}
})
canvas.Show()
while true
  msg = Wait(0, port) ' where port is a roMessagePort
  if type(msg) = "roVideoScreenEvent"
    if msg.isScreenClosed()
    end if
  end if
end while

deviceInfo = CreateObject( "roDeviceInfo" )
displaySize = deviceInfo.GetDisplaySize()
background = {
    Color: "#000000"
}
loadingImage = {
    Url: "pkg:/images/Logo.png"
     TargetRect: {
        x: Int( displaySize.w / 2 ) - Int( 336 / 2 ),
         y: Int( displaySize.h / 2 ) - Int( 209 / 2 ),
         w: 365,
         h: 110
     }
}
loadingText = {
     Text: "Loading...",
     TextAttrs: {
         Font: "Large",
         VAlign: "Bottom"
     },
     TargetRect: {
        x: loadingImage.TargetRect.x,
        y: loadingImage.TargetRect.y + 225,
        w: loadingImage.TargetRect.w,
        h: 30
     }
}
canvas = CreateObject( "roImageCanvas" )
canvas.SetLayer( 0, [ background, loadingImage, loadingText ] )
canvas.Show()

Main()

End Sub

Sub Main()
   
    'initialize theme attributes like titles, logos and overhang color
   initTheme()
    screen=preShowHomeScreen("", "")
    'set to go, time to get started
   if screen=invalid then
        print "unexpected error in preShowHomeScreen"
        return
    end if
	showHomeScreen(screen)
End Sub


'*************************************************************
'** Set the configurable theme attributes for the application
'**
'** Configure the custom overhang and Logo attributes
'** Theme attributes affect the branding of the application
'** and are artwork, colors and offsets specific to the app
'*************************************************************

Sub initTheme()

    app = CreateObject("roAppManager")
    theme = CreateObject("roAssociativeArray")

    theme.OverhangOffsetSD_X = "72"
    theme.OverhangOffsetSD_Y = "31"
    theme.OverhangSliceSD = "pkg:/images/Overhang_Background_SD.png"
    theme.OverhangLogoSD  = "pkg:/images/Overhang_Logo_SD.png"

    theme.OverhangOffsetHD_X = "125"
    theme.OverhangOffsetHD_Y = "35"
    theme.OverhangSliceHD = "pkg:/images/Overhang_Background_HD.png"
    theme.OverhangLogoHD  = "pkg:/images/Overhang_Logo_HD.png"
   theme.BackgroundColor = "#FFFFFF"
    app.SetTheme(theme)

End Sub

Any experienced developers, I'd appreciate you help. Maybe RokuChris? Thanks.

You created the facade screen, but it was never shown() so it isn't actually open.
Add this after you create the facade screen.

screenFacade.Show()

Also, in your prior code listing, you use port but don't have it defined.

It's exiting the channel because you haven't defined "port" (among other reasons).

When you try and run this code you should see it enter the debugger, where it will tell you what the problem is.

You can find out more about using the debugger in the Developer Guide and the BrightScript Reference Manual. For example, if you run a telnet session to port 8085 on your Roku whenever you try to load and run a new channel, the debugger console will appear and show the debugging information. If it finds a syntax error or runtime error it will also tell you on what line in your code the error was encountered.

I see that you have both a Main() and a RunUserInterface(). Those are both special function names designated as entry points. Having both will not necessarily break things, but as a matter of best practice each channel should only define one of them, never both.

Section 2.5 of the Component Reference talks about application entry points.