Streaming video at 8kbps

TheSpanishInquisition · 7th August 2013, 16:03

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!

LoRd_MuldeR · 7th August 2013, 16:35

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?

TheSpanishInquisition · 7th August 2013, 16:42

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.

jethro · 7th August 2013, 20:52

8kbps? forget it, unless it is a static video of drying paint on a wall

benwaggoner · 7th August 2013, 22:01

Quote:

Originally Posted by jethro

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.

Blue_MiSfit · 8th August 2013, 08:14

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

7th August 2013, 16:03	#1 \| Link
TheSpanishInquisition Registered User Join Date: Jul 2013 Posts: 2	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!

7th August 2013, 16:35	#2 \| Link
LoRd_MuldeR Software Developer Join Date: Jun 2005 Location: Last House on Slunk Street Posts: 13,251	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? __________________ Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊ Last edited by LoRd_MuldeR; 7th August 2013 at 17:36.

8th August 2013, 08:14	#6 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,993	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 __________________ These are all my personal statements, not those of my employer :)

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7th August 2013, 16:42	#3 \| Link
TheSpanishInquisition Registered User Join Date: Jul 2013 Posts: 2	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.

7th August 2013, 20:52	#4 \| Link
jethro Registered User Join Date: Mar 2006 Posts: 102	8kbps? forget it, unless it is a static video of drying paint on a wall