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by drmouse
Mon Sep 07, 2020 3:24 pm
Forum: General discussion
Topic: Video Chat on the Raspberry 4
Replies: 44
Views: 12378

Re: Video Chat on the Raspberry 4

My experience with trying to set up a RPi4B for video chat has been... Challenging. I have set it up with a v1 camera module and a USB microphone, connected to my living room TV by HDMI. I have attempted to use several platforms (although most of my testing has been on Google Meet). The web interfac...
by drmouse
Fri Apr 26, 2013 8:46 am
Forum: Media centres
Topic: HDMI, CEC and Composite
Replies: 0
Views: 889

HDMI, CEC and Composite

Hi all I am currently planning a new setup on my Pi, and need a little info. Firstly, I believe it is possible to switch between HDMI and Composite video outputs without a reboot using tvservice. Is this correct? How well does it work? The other thing is: Will HDMI-CEC still work if you are forcing ...
by drmouse
Thu Jan 17, 2013 6:09 pm
Forum: Media centres
Topic: Use RPi to change HDMI-Input to non-CEC device
Replies: 9
Views: 81142

Re: Use RPi to change HDMI-Input to non-CEC device

- startup script has the very same startup conditions as xbmc itself. Maybe this causes problems, if xbmc is started before our script. This is a simple one to fix. You just need to add a dependency to your xbmc upstart script. I believe (not being 100% familiar with upstart) you would just need ch...
by drmouse
Tue Oct 30, 2012 12:10 pm
Forum: Advanced users
Topic: I2C pi-to-pi
Replies: 7
Views: 2883

I2C pi-to-pi

Hi all I don't know if this is possible, and it's just for general info at the moment. Has anyone tried running comms between 2 Pi's using I2C (or SPI, for that matter)? If so, what sort of transfer speed could be achieved (assuming decent wiring between them)? I have seen some mentions of a max the...
by drmouse
Mon Oct 29, 2012 11:36 am
Forum: Advanced users
Topic: Removing unnecessary connectors
Replies: 6
Views: 4503

Re: Removing unnecessary connectors

Cheers for all the suggestions.

I'm not going to be doing this until I get a new Pi. I'm just getting info for the moment to help me decide whether to do this. From your suggestions, it looks like this is all doable.

I'll keep you all updated when I get around to doing this.

Thanks again :D
by drmouse
Fri Oct 26, 2012 11:04 am
Forum: Advanced users
Topic: Removing unnecessary connectors
Replies: 6
Views: 4503

Removing unnecessary connectors

Hi all I currently have a Pi set up as a media centre. The case is an old freeview box. This works well enoug, but a lot of space is taken up with connectors and adapters, and the positioning is tricky and messy to get access to the network and USB connectors. So here are my plans for this Pi (a rev...
by drmouse
Mon Oct 15, 2012 3:43 pm
Forum: Media centres
Topic: RaspBMC Video Scaling
Replies: 7
Views: 6128

Re: RaspBMC Video Scaling

I don't know exactly how/why, but after a new re-imaging it all works as expected (except for the annoying double-press lirc issue noted elsewhere). Happily used for a couple of hours to watch Andromeda while the other half was watching X-Factor. Next step: setup a mysql library so I can share it wi...
by drmouse
Mon Oct 08, 2012 8:35 am
Forum: Media centres
Topic: RaspBMC Video Scaling
Replies: 7
Views: 6128

Re: RaspBMC Video Scaling

OK, I got this working (ish). I flashed RC5 (on a new SD) and now it scales the video correctly. I now have a new problem. When playing a video (from my network) it takes a long time to load. During this time, the audio starts before the video. Not a big problem, I've had it before on other systems,...
by drmouse
Fri Oct 05, 2012 12:42 pm
Forum: Media centres
Topic: RaspBMC Video Scaling
Replies: 7
Views: 6128

Re: RaspBMC Video Scaling

I will have a look at that. However, I am using composite video out, not HDMI, with sdtv_mode=2, and when I had a quick flick through the settings this morning it looked like the correct res.
by drmouse
Fri Oct 05, 2012 9:47 am
Forum: Media centres
Topic: RaspBMC Video Scaling
Replies: 7
Views: 6128

RaspBMC Video Scaling

Hi I've finally got my media play set up this morning. Lots of faffing around with remotes and SCART connections, but it is now hooked up and running. YAY! :D I do have one small issue: The videos don't scale correctly. When playing a video, they sit in the middle of the screen, scaled down from wha...
by drmouse
Fri Oct 05, 2012 9:16 am
Forum: Media centres
Topic: XBMC timeout/screensaver custom command
Replies: 2
Views: 1914

Re: XBMC timeout/screensaver custom command

OK, I'm guessing nobody has an answer to this. I've just set it up so the power button on my remote runs my script, toggling the GPIO.It works, although I'll look into something better later.
by drmouse
Thu Oct 04, 2012 7:01 am
Forum: Graphics, sound and multimedia
Topic: Best way to get very precise sample playback w/multiple RPs?
Replies: 13
Views: 3850

Re: Best way to get very precise sample playback w/multiple

Ok, this is not my field of expertise, so take this with a pinch of salt. First, you do not necessarily need the "wall" clocks to be in sync. I'd say ignore them. What you need is for a signal to start something on both pis. My first choice would be a GPIO: the first pi asserts one, which ...
by drmouse
Wed Oct 03, 2012 10:31 am
Forum: Media centres
Topic: XBMC timeout/screensaver custom command
Replies: 2
Views: 1914

Re: XBMC timeout/screensaver custom command

Just a quick update: My SCART switching circuit works :D It only works for widescreen at the moment. To use it with a 4:3 screen, you would need a 12V supply of some sort (I am planning, at a later date, to add this using a simple boost converter, driven by a Pi PWM pin). But, on my TV, it works. Sc...
by drmouse
Tue Oct 02, 2012 3:56 pm
Forum: Media centres
Topic: Use RPi to change HDMI-Input to non-CEC device
Replies: 9
Views: 81142

Re: Use RPi to change HDMI-Input to non-CEC device

Hi I have looked into this before for another project (an Arduino-based CEC dongle for a PC). One of the "problems" of CEC is it uses non-CEC mapping from the start. Basically, there is a separate line, can't remember what it's called, over which the TV & source communicate things like...
by drmouse
Tue Oct 02, 2012 3:09 pm
Forum: Media centres
Topic: XBMC timeout/screensaver custom command
Replies: 2
Views: 1914

XBMC timeout/screensaver custom command

Hi all I have finally started work to put my first Pi to use. After considering many other, more complicated projects, I finally settled on a media player for the bedroom TV. I had a few extra requirements, though, mostly based around needing it to be easy for SWMBO to use and it looking like an app...
by drmouse
Wed Sep 05, 2012 2:15 pm
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

Re: H264 performance & VLC

Brilliant. It should be possible to do what I am after then. One last thing before I actually try it myself: Can the hardware (and the library) handle multiple concurrent encodes? i.e., taking my assumed raw YUV422 stream, could it encode to multiple streams simultaneously, for example at multiple b...
by drmouse
Wed Sep 05, 2012 9:47 am
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

Re: H264 performance & VLC

That could work. You will need to recompile it (at the very least to call bcm_host_init, but you'll probably find there are other tweaks needed). Hopefully they use openMAX for encode as well as decode. Actually for transcoding, the inefficiency is not so bad - the are won't have to do the YUV->RGB...
by drmouse
Tue Sep 04, 2012 2:46 pm
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

Re: H264 performance & VLC

Thanks Dom.

For my own use I am not actually looking to play a file, but to use VLC to stream it. It would basically be doing realtime transcoding and mux'ing of SD content.
by drmouse
Tue Sep 04, 2012 11:47 am
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

Re: H264 performance & VLC

OK, I've been starting to look into this. First off: VLC actually contains an OpenMAX-IL "codec" already. I have to assume, however, that it doesn't currently support the Pi, because someone must have tried enabling this already. I can't believe I am the first person to notice. Unless I he...
by drmouse
Tue Sep 04, 2012 6:34 am
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

Re: H264 performance & VLC

Ok, thanks. That's a bummer. Does anyone know what would be involved in adding support? I'm not a terrible programmer, although the only time I've tried anything with AV encoding I got lost in the ffmpeg source and gave up (I've found that to be the biggest stumbling block helping with FOSS: the cod...
by drmouse
Mon Sep 03, 2012 2:46 pm
Forum: Media centres
Topic: H264 performance & VLC
Replies: 17
Views: 16285

H264 performance & VLC

Hi all Having just seen the info about hardware codecs now available for the Pi, I have a few quick questions about the now-available H264 encoder. First off, has anyone here tested them and, if so, what is the performance like? As in roughly what would be the performance of a hardware H264 encode o...

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