Roku Developer Program

Developers and content creators—a complete solution for growing an audience directly.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Sebby
Level 7

Stream live TVs

Hi All,

I am starting (just starting tonight) developping on Roku and first thing I remarked, there is very few articles/how to about the basics of Roku developement.

I am intserested in writing an application to stream French TV (yes I am french and miss my tv shows some days Smiley Happy ). I would like to take that opportunity to write an "how to" on live streaming after my dev.
I might need you help to start understanding how all of that works. First step I am trying to redo the Nasa TV (nicely done by Chris) as an excercise and I thought it would have been pretty straight forward. I was wrong.

So here where I am (I started with the simplevideoplayer project):

Function displayVideo()
print "Displaying video: "
p = CreateObject("roMessagePort")
video = CreateObject("roVideoScreen")
video.setMessagePort(p)

'bitrates = [0] ' 0 = no dots, adaptive bitrate
bitrates = [150]

'Swap the commented values below to play different video clips...
urls = ["http://www.nasa.gov/55644main_NASATV_Windows.asx"]
qualities = ["HD"]
StreamFormat = "wmv"
title = "Nasa TV"

videoclip = CreateObject("roAssociativeArray")
videoclip.StreamBitrates = bitrates
videoclip.StreamUrls = urls
videoclip.minBandwidth = 20
videoclip.StreamQualities = qualities
videoclip.StreamFormat = streamformat
videoclip.Title = title
'videoclip.Live = true

video.SetContent(videoclip)
video.show()

lastSavedPos = 0
statusInterval = 10 'position must change by more than this number of seconds before saving

but I got this error message:

------ Running ------
showSpringboardScreen
Button pressed: 1 0
Displaying video:
play failed: An unexpected problem (but not server timeout or HTTP error) has been detected.
Closing video screen
Screen closed



Is anyone can help me to understand what is wrong ?

I've tried HLS and SD of course as well as bitrate = 0.
I know the format of the streaming is wmv in 150kb (found the info on internet).

Thanks for your help
0 Kudos
4 REPLIES 4\
RokuChris
Roku Employee
Roku Employee

Re: Stream live TVs

The stream referenced in the code snippet you posted is hosted on an MMS server. Roku cannot play MMS content. The only live streaming technology supported on Roku is HTTP Live Streaming (http://developer.apple.com/resources/http-streaming/).
0 Kudos
Sebby
Level 7

Re: Stream live TVs

Thanks Chris,

Do you know couple of links using HTTP Live Stream protocol I can try to set up my application ?
I tried to google it but no luck so far (or maybe a wrong configuration from me).

As well, do you know a good tool to analyze the streams ? for instance, how do you know the link I provide was host on an mms server ?

Thanks
0 Kudos
timber03
Level 7

Re: Stream live TVs

"Sebby" wrote:
Thanks Chris,

Do you know couple of links using HTTP Live Stream protocol I can try to set up my application ?
I tried to google it but no luck so far (or maybe a wrong configuration from me).


the custom video example has a few, here's one:
http://ec2-184-72-239-149.compute-1.ama ... ylist.m3u8
Channels created
--------------------
REDBULLTV - RedBull's online sports channel. All sports, all the time.
JTV - Jewelry TV

Other Projects/Creations
-----------------------------
http://www.socialnetworkinc.com - Your Community. Connected.
0 Kudos
Sebby
Level 7

Re: Stream live TVs

Thanks, that works great. I just did not had the right link. I managed as well to find the nasa link and bunch of others as well.
So now I can start working on my app and write a small article gathering all the knowledge on that specific topic.
0 Kudos