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by Redsandro
Tue May 21, 2019 7:58 pm
Forum: Camera board
Topic: Flashing band across video
Replies: 41
Views: 17496

Re: Flashing band across video

I got heavy colored banding. I can't quote your picture, but I have exactly this. vlcsnap-2019-05-21-21h46m18s2532.jpg vlcsnap-2019-05-21-21h46m36s2862.jpg vlcsnap-2019-05-21-21h46m41s8792.jpg Some light-brown horizontal banding flicker. However, when I just turned on the camera, it's almost brand ...
by Redsandro
Sun Apr 17, 2016 11:56 am
Forum: Graphics, sound and multimedia
Topic: [Pi 1b] Cannot save audio volume with alsactl store
Replies: 0
Views: 578

[Pi 1b] Cannot save audio volume with alsactl store

I have mpd running on headless raspbian. $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] Subdevices: 7/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4:...
by Redsandro
Tue Nov 17, 2015 4:41 pm
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

I thought I understood the problem. Not enough power is allowed through the Pi, To the USB Wifi Dongle. I understood I could bypass F1 and F2 in order to fix that. However, now I understand that I have the Rev 2 (0x000d), which doesn't have F1 and F2. So why doesn't it drain more amps from my 2.1 am...
by Redsandro
Tue Nov 17, 2015 12:54 pm
Forum: Camera board
Topic: Mux a live h264 stream into mp4 realtime with pure python?
Replies: 0
Views: 682

Mux a live h264 stream into mp4 realtime with pure python?

The camera streams raw h264 using picamera. Can we mux this directly to mp4 without much overhead from within python? I have googled around but everyone seems to resort to external programs like gpac/mp4box or ffmpeg. Is that really necessary? Is adding container metadata to the raw stream such a co...
by Redsandro
Tue Nov 17, 2015 11:48 am
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

Is there a way to see what version Pi something is just looking at the board? This one says "2011.12" but it seems I can still 'backfeed' it with power from USB. Someone also gave me a red Pi. <3 Works just the same, but it is red. Is it a replica? you could power via a 5V and GND pin on the GPIO. T...
by Redsandro
Tue Nov 17, 2015 12:02 am
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

If it's a bad power source and/or bad cable, I am in the clear. I can replace both. I have better power sources. This is just a (cheap) power source + separate cheap cable I could hook up to demonstrate the Charger Doctor. The other adapters connect straight to micro-usb so I cannot put the CD monit...
by Redsandro
Mon Nov 16, 2015 8:23 pm
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

On the RPi B Rev 1 there are polyfuses on the USB ports F1 and F2 near the USB ports. These were removed in later versions. I think they are rated at 180mA and would not allow higher power devices such a WIFI to work. They also block 'backfeeding' from the USB ports. You can remove F1 and F2 and sh...
by Redsandro
Mon Nov 16, 2015 4:34 pm
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

Thanks for the tips. I prefer to use my 'old hardware' because, well, I have it. I don't need to buy it. I also have a proper power supply; a phone charger that goes up to two amps. Here is the problem: It seems like this particular model of Raspberry Pi takes a maximum of 800 mA from the front. So ...
by Redsandro
Mon Nov 16, 2015 3:34 pm
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

Which RPi model do you have and what was attached to the RPi when you got the 800mA measurement? It's a long time ago. I think I purchased this in 2012. It was from a company called Farnell Element 14. I had big plans, but no time. So I am 3 years late to the game. ;) 2x RASPBRRY-MODB-512M SBC, RAS...
by Redsandro
Mon Nov 16, 2015 11:46 am
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

Re: How to not care about power usage

I have the official one, and it "sucks". It barely takes one amp. It says it can provide one amp, but I've never measured anything above 800mA. The problem seems to be more technical: Both inputs seem to be limited on the Pi. What hardware component do I need to solder off and bridge in order for th...
by Redsandro
Mon Nov 16, 2015 12:46 am
Forum: Troubleshooting
Topic: How to not care about power usage
Replies: 23
Views: 2648

How to not care about power usage

So, this Pi, it's pretty sensitive about how much power it uses. When I attach a camera module and a wifi dongle, it chokes and reboots because there is not enough power. It doesn't matter if the power source has enough amps available, because the Pi seems to limit this to something barely usable. S...
by Redsandro
Mon Dec 15, 2014 10:09 am
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 175566

Re: Pure Python camera interface

I don't like having to concert the h264 streams to mp4 or mkv afterwards. I know it should be possible to store this in a container directly from the stream, but for some reason I haven't managed to create a playable file by piping from pyCamera directly to ffmpeg or one of the other stream processo...
by Redsandro
Thu Oct 30, 2014 4:55 pm
Forum: Camera board
Topic: Firmware upgrade stops cam?
Replies: 27
Views: 16849

Re: Firmware upgrade stops cam?

It was resolved on github (link provided in previous message).
The cma settings caused the GPU to fail from firmware #676 and up. All I had to do was remove the settings from /boot/config.txt.

---

Did anyone make a motion detected image or video capturer yet based on piCamera's motion functions?
by Redsandro
Tue Oct 28, 2014 11:32 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless problem: download to Pi fast, upload slow
Replies: 15
Views: 6030

Re: [SOLVED] Wireless problem: download to Pi fast, upload s

thank you, that link is very informative.
by Redsandro
Tue Oct 28, 2014 8:42 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless problem: download to Pi fast, upload slow
Replies: 15
Views: 6030

Re: [SOLVED] Wireless problem: download to Pi fast, upload s

I found out that using an powered USB hub causes the upload speed to be fast(er). This puzzles me, because I am using a 2A power supply for the Pi specifically for this reason. The Pi, without the Wifi module, works fine with a 0.5A power supply. So the supply seems more than enough. It is as if the...
by Redsandro
Tue Oct 28, 2014 3:01 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless problem: download to Pi fast, upload slow
Replies: 15
Views: 6030

Re: [SOLVED] Wireless problem: download to Pi fast, upload s

May I ask what you mean by "breaks the camera module"? http://www.raspberrypi.org/forums/viewtopic.php?p=631788#p631788 Asking Google for your chipset "RTL8188CUS" I find many posts that claim successful operation on Raspberry, even as an access point. True, I read that too, although there are also...
by Redsandro
Sun Oct 26, 2014 8:49 pm
Forum: Troubleshooting
Topic: [SOLVED] Wireless problem: download to Pi fast, upload slow
Replies: 15
Views: 6030

Re: [SOLVED] Wireless problem: download to Pi fast, upload s

I have a similar problem where download is ~600KB/s and upload is ~50KB/s. I updated from #600 to #675 (but cannot go any higher because it breaks the camera module) Can I install the module separately from some source to check it out? $ readlink /sys/class/net/wlan0/device/driver ../../../../../../...
by Redsandro
Sun Oct 26, 2014 4:38 pm
Forum: Camera board
Topic: Firmware upgrade stops cam?
Replies: 27
Views: 16849

Re: Firmware upgrade stops cam?

Resolved the issue by downgrading to firmware #600 by using: rpi-update b62ec22eac11772e3a013a0faedd6d790da23c66 Silly updates. My advice: Busy man, just want to play around a bit? If it ain't broke, don't update! Got oceans of free time? Update weekly, report all bugs, find the problems, commit fix...
by Redsandro
Sun Oct 26, 2014 4:02 pm
Forum: Camera board
Topic: Firmware upgrade stops cam?
Replies: 27
Views: 16849

Re: Firmware upgrade stops cam?

I now have the same problem. I last touched my Raspberry Pi in 2013. A year ago. Too much little things that broke it, needing me to invest time, let me leave it alone. Today I thought: Let's play around with some updated packages. First thing I did, make some pictures. I - stupidly, if it ain't bro...
by Redsandro
Sun Dec 01, 2013 8:26 am
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 175566

Re: Pure Python camera interface

One more function and this module is complete.

If we can cam.capture() while cam.recording() we can record as long as there is motion, in stead of taking a static guess.
by Redsandro
Sat Nov 30, 2013 12:08 am
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 175566

Re: Pure Python camera interface

waveform80 wrote:I'm currently on #594 and using the video-splitter to do recording and simultaneous capture seems to work happily on mine, but I haven't upgraded the firmware in a week or two.
Can you provide a code example on how to do that?
by Redsandro
Fri Nov 29, 2013 11:46 pm
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 175566

Re: Pure Python camera interface

Just curious, why the camera preview for 2 seconds?
by Redsandro
Thu Nov 28, 2013 9:40 pm
Forum: Camera board
Topic: When raspivid fails, I cannot use camera until reboot
Replies: 0
Views: 675

When raspivid fails, I cannot use camera until reboot

Basic usage of raspistill and raspivid cause no problems. But when a video fails to record, e.g. [email protected]:tmp$ raspivid -n -fps 25 -g 25 -w 2560 -h 1920 -o /tmp/test.264 mmal: mmal_vc_port_enable: failed to enable port vc.ril.video_encode:in:0(OPQV): EINVAL mmal: mmal_port_enable: failed to ...
by Redsandro
Tue Nov 26, 2013 4:24 pm
Forum: Camera board
Topic: Pure Python camera interface
Replies: 462
Views: 175566

Re: Pure Python camera interface

That sounds awesome. Although with 'normal' h264 encoding I found that not every resolution will be encoded, and only a few levels/resolutions seem to produce an acceptable stream for certain playback hardware. I'm not sure if this was software-induced (i.e. producing corrupted metadata) or a real t...
by Redsandro
Tue Nov 26, 2013 7:18 am
Forum: Camera board
Topic: PoC: Poor man's high framerate full HD motion detection
Replies: 25
Views: 14572

Re: PoC: Poor man's high framerate full HD motion detection

Thanks for the link, sounds interesting and promising. I'm a Pi noob so this is probably my own fault, but using the latest image and the dynamic GPU memory allocation trick in config.txt , raspivid now complains of out of memory. Is dynamic GPU memory allocation incompatible with the camera module?...

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