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Old 7th August 2013, 16:03   #1  |  Link
TheSpanishInquisition
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Streaming video at 8kbps

Chaps,


I'm looking to stream H264 at 1fps at 8kbps. I'm happy to encode the videos myself but they have to be streamable to my phone (Android with VLC). Was going to use x264 for this. Any help as to how to go about this? I could upload them to drop box but the connection speed (GPRS) is too slow for it to be reliable. I'm thinking if I can host it somewhere I can just stream with VLC?


Thanks for any help!
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Old 7th August 2013, 16:35   #2  |  Link
LoRd_MuldeR
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8 kbps is extremely low, even at 1 fps. That's equivalent to about 200 kbit/s at 25 fps.

And I would assume temporal difference between frames becomes very large at 1 fps, so compression is probably much worse than at 25 fps.

Anyway, what is holding you back from just using x264 with "--bitrate 8", preferably in 2-Pass mode, and see how it goes?
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Old 7th August 2013, 16:42   #3  |  Link
TheSpanishInquisition
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Thanks for your reply Lord_M. I realize the low bitrate is a problem, but it's because of a bad GPRS connection. I'll get to the PC later (on a tablet ATM) and get back to you on how it goes.
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Old 7th August 2013, 20:52   #4  |  Link
jethro
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8kbps? forget it, unless it is a static video of drying paint on a wall
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Old 7th August 2013, 22:01   #5  |  Link
benwaggoner
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Quote:
Originally Posted by jethro View Post
8kbps? forget it, unless it is a static video of drying paint on a wall
I had to encode some gold swing video using the first beta of RealVideo targeting 18 Kbps including audio. This can't look any worse than that!

Although that did look horrible. The golf club's shaft vanished during every swing, and the fps was so low the ball was visible in flight for maybe 1 frame.
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Old 8th August 2013, 08:14   #6  |  Link
Blue_MiSfit
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I just did a test with some highly compressible animated content (South Park) and got perfectly good results encoding 158x88p1 at 8 kbps. I mean, it's a slideshow obviously, but it didn't look too bad, even blown up 2-3 times.

I was able to get full 24p looking good around 40 Kbps. Of course, this is all unrestricted high profile with --tune animation, so a ton of refs and bframes. It was also pure VBR with no VBV, which you would want for streaming over the cell network

So yeah, take that with a grain of salt. Difficult content would obviously not do so well. That being said, this paired with a 24 Kbps HE-AAC v2 audio stream means 64 kbps for (relatively) nice looking and sounding full rate postage stamp video. I like experiments like these
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