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Old 09-18-2008, 05:02 PM   #1
moyekj
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HME createStream long delay

When using HME createStream for creating a video stream there is a several second delay during which Tivo builds up a stream buffer before displaying the stream.

Was wondering if there is any control over this at all on the HME side? Perhaps a URL option of some sort to specify buffer size or display delay time?

The reason this is important is I'm working on a way to allow jumping ahead of Tivo's stream buffer when streaming video. Thus, for example if the Tivo buffer is at 5 minute mark but user wants to jump to 8 minute mark (or any arbitrary point beyond the Tivo buffer end point). Only reliable way I've found to do this is to close down the current stream and start a new stream at a specified byte offset. That works, but there is a several second delay on the Tivo side displaying the newly started stream. I was hoping with some additional control I could somehow reduce that delay.
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Last edited by moyekj : 09-18-2008 at 05:08 PM.
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Old 09-19-2008, 11:40 PM   #2
wmcbrine
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Undoubtedly there is some such option, because the YouTube videos don't take 13 seconds to start up. But I don't know what it is (I've posted everything I know about the subject in the "Video Streaming in HME" thread), TiVo isn't publishing it (so far), and no one else seems to be investigating.
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Old 09-19-2008, 11:58 PM   #3
moyekj
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Quote:
Originally Posted by wmcbrine View Post
Undoubtedly there is some such option, because the YouTube videos don't take 13 seconds to start up. But I don't know what it is (I've posted everything I know about the subject in the "Video Streaming in HME" thread), TiVo isn't publishing it (so far), and no one else seems to be investigating.
Good point about YouTube. Perhaps it's time for me to pull out the old hub and do some network sniffing during YouTube streaming to see if that reveals anything.
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Old 09-21-2008, 05:25 PM   #4
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Not sure anything useful can be gleamed from network sniffing YouTube. Here's a snapshot of the most interesting/relevant lines:

1844 22.305604 192.168.1.1 192.168.1.107 DNS Standard query response CNAME vp.video.l.google.com A 209.85.139.176

1849 22.357611 192.168.1.107 209.85.139.176 HTTP GET /videodownload?version=0&secureurl=pgAAALxRpszUgTK_K_xaZ04iy5 uC7Q4tXbv1F2HPywwi8bpANhn7uRBwayqUsi5EHmXpoliqwcwMDMHwfsQt4O nRpnm9WmAEzORjpyPSqcctK5kcSoo1Fk_OSkVOBQRgLkxdnTlPctXMhWDegO PreYu51tJfmLw5q4XystFMXPvy0NxLmufjoVa0HHUyVyXpqxZKdVFY72FUx4 S2zFVCuOpmXYST4oTLxYmPMW0FWu0RJ_Q2&sigh=HwVtUInwj4QAQlaOXm2H OUVo5f8&begin=0&len=821000&docid=2230210229661132749&client= 337482713933&key=wgv9zkrJNjHGVAHpaF2MoGD9LlbsOl3qUImVMV6ramM HTTP/1.1

1863 22.660892 192.168.1.107 209.85.141.176 HTTP GET /videodownload?version=0&secureurl=pgAAALxRpszUgTK_K_xaZ04iy5 uC7Q4tXbv1F2HPywwi8bpANhn7uRBwayqUsi5EHmXpoliqwcwMDMHwfsQt4O nRpnm9WmAEzORjpyPSqcctK5kcSoo1Fk_OSkVOBQRgLkxdnTlPctXMhWDegO PreYu51tJfmLw5q4XystFMXPvy0NxLmufjoVa0HHUyVyXpqxZKdVFY72FUx4 S2zFVCuOpmXYST4oTLxYmPMW0FWu0RJ_Q2&sigh=HwVtUInwj4QAQlaOXm2H OUVo5f8&begin=0&len=821000&docid=2230210229661132749&client= 337482713933&key=wgv9zkrJNjHGVAHpaF2MoGD9LlbsOl3qUImVMV6ramM &rdc=1 HTTP/1.1

There are &begin and &len options in the above...
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Old 09-21-2008, 07:52 PM   #5
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I think the side you want to look at is the HME side. Of course it's probably SSL'd.
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Old 09-21-2008, 09:20 PM   #6
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Quote:
Originally Posted by wmcbrine View Post
I think the side you want to look at is the HME side. Of course it's probably SSL'd.
Yes unfortunately most of the communications are secure/encrypted so it's hard to pull anything useful out of the packet dump.
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