Raspberry Pi Forums

spock

hm... strange!

i did it like you and can't esc.

spock

thanks for your answer!

what i forgot to say is that i boot to the cli and not to x.

isn't xterm for x?

spock

i would like to start omxplayer automatically after booting. so i have put it into .profile and it works fine but i also need to be able to quit it with esc. why doesn't this work if i put stuff in .profile? how can i achieve this in a non-complicated way?

spock

@Aydan: oh! i see! i misunderstood the gadget setup.

@aBUGSworstnightmare: sorry, i was refering to Aydan's post.

@DavidS: it's not only a presentation of still images. it should be video with 25fps. but i will look into the SPI nevertheless. thanks!

spock

thanks! the piwall project sounds interesting too.

about that gadget thing... are you sure this would work with a raspberry pi 3 as gadget and zeros as "clients"? since in all tutorials i saw it was the other way around and the zero always was the gadget?

spock

thanks! sounds interesting.

but could i serve a different video to each client with that method?

spock

HDMI.

Code: Select all

hdmi_force_hotplug=1
hdmi_ignore_edid=0xa5000080

thanks! i will try this next time i work on the project.

spock

price isn't my primary concern. i would like to avoid having to deal with 20 (or so) sdcards and linux installations.

any other ideas to make this more convenient? net booting doesn't work with pi zeros right?

(i think at the pihut you can order 2 pi zeros per order (one pi zero + one pi zero w).)

spock

i am doing an art project where i need to display videos on a lot of small screens. i was thinking of waveshare 5" screens with a resolution of 800x480 for example. i would like to avoid having to use one raspberry pi per screen though since that would be quite cumbersome. does anyone know if there ...

spock

currently it's the 4" that gives me trouble.

spock

i don't think that's the issue. i made the correct settings in config.txt according to the waveshare wiki. and if i turn on the screen before the raspberry pi it reliably works. the problem just arises if i power it from the raspberry pi's usb. then the start up order seems to be a bit random and so...

spock

i use various kinds of waveshare screens for my projects. there is one problem though. i think the raspberry pi requires that the screen is switched on before itself gets switched on so that it can recognize it. but i would like to power the screens from the raspberry pi usb so that only one power s...

spock

it's a 5" waveshare display connected per hdmi. yes, the display has a second micro usb port which is supposed to power the raspberry pi but this didn't work reliably for me. it only seems to work reliably if the display has power before the raspberry pi. (i also know this behaviour from my other me...

spock

for an art installation i use a raspberry pi with a 5" hdmi screen. it seems like the raspberry pi doesn't recognize the screen if it doesn't get turned on before the raspberry pi. so to make this fool proof i used a relay which turns on the raspberry pi a few seconds after the screen. it seems to w...

spock

hm... i always was under the impression that qualcomm is much much bigger than broadcom. how could broadcom have bought them?

spock

Heater wrote: ↑
Fri Oct 06, 2017 5:34 pm
I'm not sure what you mean by "stuff just gets copy&pasted thousands or millions of times". Nobody designs like that. Hardware or software.

what i meant is that chips can have a billion transistors but a lot of this number can be things that repeat a lot, like sram cells.

spock

Common ratio - 1 hardware guy needs 5-10 software guys :o interesting. yes, that's the kind of picture i get. :) What kind of hardware are you talking about? Or what kind of software for that matter? mostly i was thinking about designing cpus and gpus. so actually hardware = software (kind of) in t...

spock

are big software projects more complex nowadays or harder to do than hardware projects? sometimes i get the impression... it seems to be the case with the raspberry pi project itself (i think they underestimated the software part at the beginning? wayland, opengl driver,...) and also with the raspbe...

spock

this happened to me too.

but luckily i still got it to work with some hot glue.

spock

your script doesn't seem to work anymore with the newest raspbian. do you have an idea why?

spock

for me the script doesn't work anymore with the newest raspbian. the directory local-bottom doesn't exist anymore. does anyone know why?

spock

what kind of videos do you play and what player software do you use?

in my experience only the arm cores tend to get hot. the videocore seems to stay pretty cool for me when playing h264 videos with omxplayer.

spock

yes, i sometimes use it for that.

but the limitation to 1gb ram requires some discipline. you can't have many browser tabs and applications open at the same time.

spock

i think the problem with the a3 is the 25$ price target. :) it makes sense to include wifi/bt. so that's 5$ (as we see with the pi zero w). it will be a pi 3 so there will be the quad core cpu and that almost requires 1gb ram? so the only difference to the b3 would be the usb chip and the additional...

spock

yes, with kodi i actually meant libreelec. i always mix this up.

...

the good thing is that most movies aren't 16:9 but something like 2.39:1. so 1080p actually is more like 800p. less work for the raspberry pi.

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