Timeline for RPI2 USB webcam capture low FPS
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 13, 2015 at 17:35 | history | tweeted | twitter.com/StackRaspi/status/653987433344798720 | ||
| Oct 10, 2015 at 4:41 | history | edited | ssinfod | CC BY-SA 3.0 |
deleted 1 character in body
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| Oct 9, 2015 at 14:19 | comment | added | goldilocks♦ | ...The pi is like a phone. Will a phone work well with the built in camera? Sure. But just attaching a USB cam to an Android phone is problematic and no doubt disappointing to some people; AFAIK it is just plain impossible with an Apple. It is almost certain to be less optimal and more work for the processor than something intended to match the hardware. | |
| Oct 9, 2015 at 14:19 | comment | added | goldilocks♦ | Ditto Phil B.'s first comment. Ghz are not an absolute metric; what a broadcom ARM core in the pi can do in 1000 cycles is substantially less that what an intel desktop core can in 1000 cycles because of advantages in the instruction set; there is also the issue of cache sizes, more and bigger registers, etc. My quad 64 bit 3.4 Ghz i5 is not simply 3.4 / 0.9 = 3.7 times faster than a pi 2. I do a lot of compiling of identical software on both machines and I would say the desktop is more like 20+ times faster... | |
| Oct 9, 2015 at 12:32 | comment | added | dhruvvyas90 | @PhilB. Done. :) | |
| Oct 9, 2015 at 12:15 | answer | added | dhruvvyas90 | timeline score: 7 | |
| Oct 9, 2015 at 11:58 | comment | added | Phil B. | @dastaan - recommend you put your comment in as an answer as this is what the OP is asking about - real life comparables from someone else who tries the same. | |
| Oct 9, 2015 at 5:27 | comment | added | dhruvvyas90 | I use Rpi for some basic image processing based automation work and here is what I've noticed. 1. Rpi 1 hardly gives 5 fps at max for 640x480. 2. Rpi 2 gives about 14 - 16 fps at 640x480. and this limitation is mainly due to processing capabilities of rpi and USB 2.0 speed limit. | |
| Oct 9, 2015 at 2:12 | comment | added | Phil B. | Two comments: Even though the RPi2's processor is "Quad Core", it is by no means up to par to a dual-core Intel processor. The Broadcom chip is not meant to be a replacement for a desktop processor (even though the nice look & feel of many OSes on the RPi makes you think otherwise). Second of all, the USB port on the RPi is limited in throughput - not sure if that plays a role here but worthy of consideration. I believe the maximum you can get is 30Mbps (but I could be wrong). 30 fps * 3 bits per pixel * 640*480 pixels is ~30Mbps, excluding overhead, assuming no compression. | |
| Oct 9, 2015 at 1:35 | history | asked | ssinfod | CC BY-SA 3.0 |