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by tomf90
Thu Jan 25, 2018 9:21 pm
Forum: General discussion
Topic: Controlling two Pis
Replies: 7
Views: 911

Re: Controlling two Pis

If you have a look at this thread https://www.raspberrypi.org/forums/viewtopic.php?f=91&t=203010&p=1262618#p1262618 my last post is a demonstration on how to do this using a switch input on one pi turning on an LED on another, it should get you started. Thanks, i'll have a read through your posts o...
by tomf90
Thu Jan 25, 2018 9:20 pm
Forum: General discussion
Topic: Controlling two Pis
Replies: 7
Views: 911

Re: Controlling two Pis

Yes connect one GPIO on RPi A to a GPIO on RPi B Also connect a ground from A to B You will need different scripts running on each RPi. When ready to power down A will change the GPIO and B will wait for GPIO to change then issue a power down for itself. Then A will do a power down command for itse...
by tomf90
Wed Jan 24, 2018 8:12 pm
Forum: Graphics, sound and multimedia
Topic: Alsa lib error
Replies: 1
Views: 2627

Alsa lib error

I'm getting these ALSA lib errors when trying to use pyaudio. I know my mic works as I can live stream audio through gstreamer. Can anybody explain to me why i'm getting these issues: ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknow...
by tomf90
Wed Jan 24, 2018 1:36 am
Forum: General discussion
Topic: Controlling two Pis
Replies: 7
Views: 911

Re: Controlling two Pis

Ah okay thanks. Would that just be with if statements etc? For example make rpi A gpio pin high which would make rpi B gpio pin high? and then in that script if gpio is high then shutdown etc? Sorry I'm new to writing code and raspberry pi
by tomf90
Tue Jan 23, 2018 9:45 pm
Forum: General discussion
Topic: Controlling two Pis
Replies: 7
Views: 911

Controlling two Pis

Is there a way to connect two raspberry Pis together so if I execute a script on pi a to shutdown pi a it also shutdowns pi b?
by tomf90
Sun Jan 14, 2018 9:11 pm
Forum: Camera board
Topic: video stream upside down
Replies: 0
Views: 230

video stream upside down

The video stream I have from gstreamer is upside down on my webpage. How can I rotate it so its the right way up?
by tomf90
Mon Jan 08, 2018 8:37 pm
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 4125

Re: non-contact heart rate and respiration rate monitoring

Ah brilliant! Two quick questions, i'm currently using the Pi NOIR cam to stream video, can this use the camera module at the same time or does it need its own independent camera? Also, just about to order an Xbox 360 kinect, i'm assuming I need the one with the PSU as it wont be able to be powered ...
by tomf90
Mon Jan 08, 2018 7:25 am
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 4125

Re: non-contact heart rate and respiration rate monitoring

Do I just need to download the source code .tar files or do you have a tutorial I can follow or is it just the simple-ALT-raw.py page?

Thanks, Tom
by tomf90
Sun Jan 07, 2018 3:47 am
Forum: Camera board
Topic: Pi NOIR camera multiple tasks
Replies: 0
Views: 254

Pi NOIR camera multiple tasks

I'm wondering whether as you can only use one noir rpi camera module per rpi, is it possible to use the video for multiple tasks at the same time. For example I want to stream live video but also use the same video feed with something else.. there are two projects I've seen that I want to combine bu...
by tomf90
Sun Jan 07, 2018 2:40 am
Forum: Automation, sensing and robotics
Topic: non-contact heart rate and respiration rate monitoring
Replies: 19
Views: 4125

Re: non-contact heart rate and respiration rate monitoring

This is a very interesting monitoring device that you're creating!.. How are you progressing? I was hoping to implement a breathing and heart rate monitor within my baby monitor for my engineering project at university and this is the only thing I can find that seems capable of doing that accurately...
by tomf90
Fri Dec 22, 2017 7:04 pm
Forum: Graphics, sound and multimedia
Topic: GIANT UPDATE: Build FFmpeg and mpv – Automatically in 54 Minutes!
Replies: 222
Views: 102590

Re: TUTORIAL: Play or Encode High-Quality Video and Audio – with FFmpeg and mpv

As a complete novice it was refreshing to find a tutorial on this forum that covers what I needed and explains it clearly. I don't suppose you could drop me a message explaining how I would be able to use this to stream video from my pi noir cam and audio from my usb mic to a webpage? I know you're ...
by tomf90
Sun Dec 10, 2017 5:51 pm
Forum: Beginners
Topic: Streaming Audio and Video from a USB Webcam
Replies: 0
Views: 255

Streaming Audio and Video from a USB Webcam

I've only just started using a Raspberry Pi 3, so not really sure what to try next... Hopefully you guys can help! I'm trying to create a baby monitor from my Raspberry Pi 3. I have a USB webcam attached to stream live audio and video but everything I've seen online hasn't worked. I've spent quite a...

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