Timeline for Can I stream 1080p video from the Pi?
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 3, 2012 at 10:57 | comment | added | Piotr Kula | That is a very good point. Thinkning that the chip is LAN chip you would have expected the LAN module to do this independent of the BCM CPU core? I think something else is causing the CPU to spike.. data shifting from SD to the LAN bus(USB) not sure what it is. | |
| Aug 3, 2012 at 10:53 | comment | added | user13 | I am not happy, of course not :) But it is understandable. Even TCP itself is quite a resource-intensive protocol. It has to calculate checksums all the time, fragment data, take care of retransmittions, .. | |
| Aug 3, 2012 at 10:51 | comment | added | Piotr Kula | Wow. So are you happy to say that using LAN direcly influences the CPU? Do you think that if something was already running an intense arithmetic procedure (eg video encoding) it would impair reading the SD card.. and cut the throughput to LAN? | |
| Aug 3, 2012 at 10:49 | comment | added | user13 | @ppumkin Yes, see my edit. | |
| Aug 3, 2012 at 10:48 | history | edited | user13 | CC BY-SA 3.0 |
added 117 characters in body
|
| Aug 3, 2012 at 10:39 | comment | added | Piotr Kula | Yea- By definition if the USB Hub runs at High Speed then you have 480mbs bandwidth almost 5 times that LAN needs.. so there should not be any problems. But if it does not run at full sped for whatever reason.. This is really providing some good feedback. PS - Can you monitor the CPU load while doing this? | |
| Aug 3, 2012 at 10:27 | comment | added | user13 | @ppumkin See my edit. | |
| Aug 3, 2012 at 10:27 | history | edited | user13 | CC BY-SA 3.0 |
added 494 characters in body; added 38 characters in body
|
| Aug 3, 2012 at 10:14 | comment | added | user13 |
@ppumkin iperf tests only network performance. If I recall correctly, it sends 0123456789 repeatedly. Will do a test with SD card I/O soon and let you know.
|
|
| Aug 3, 2012 at 9:41 | comment | added | Piotr Kula | Cool- I will have to give that go. How did you get 90mbs? reading your flash or usb stick? writting? | |
| Jun 19, 2012 at 10:09 | vote | accept | berry120 | ||
| Jun 14, 2012 at 15:30 | history | edited | user13 | CC BY-SA 3.0 |
added 64 characters in body
|
| Jun 14, 2012 at 15:18 | comment | added | Mark Booth | A Class 6 SD card should be capable of 6MBps read speeds (6 Megabytes per second), so unless there is some limitation in the Raspberry Pi SD interface, a class 10 card should be more than capable of saturating a 100mbps (100 megabits per second) once protocol overheads are taken into account. | |
| Jun 14, 2012 at 14:52 | comment | added | user13 | I retested just to be on the safe side and it is actually slightly less - around 90 Mbps, but still well enough for streaming. | |
| Jun 14, 2012 at 14:51 | history | edited | user13 | CC BY-SA 3.0 |
Methodological error.
|
| Jun 14, 2012 at 14:44 | comment | added | berry120 | Thanks for that. Sure, a USB hard drive (externally powered) seems like what I'm going for in terms of storage at present. | |
| Jun 14, 2012 at 14:38 | history | edited | user13 | CC BY-SA 3.0 |
added 1 characters in body
|
| Jun 14, 2012 at 14:33 | history | answered | user13 | CC BY-SA 3.0 |