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by fredfs
Tue May 28, 2019 11:41 pm
Forum: Advanced users
Topic: Analogue audio redux
Replies: 78
Views: 27355

Re: Analogue audio redux

On most recent firmware (archlinux-arm)
using audio_pwm_mode=2
makes MPD music sound slower, like some frequency rate error.
audio_pwm_mode=1, sound good.
by fredfs
Wed Mar 06, 2019 1:03 pm
Forum: Graphics, sound and multimedia
Topic: Project Idea - Is this Doable?
Replies: 3
Views: 823

Re: Project Idea - Is this Doable?

Is it ok to offer my services here?
I can code this for you, email me at [email protected]
by fredfs
Mon Oct 30, 2017 1:15 pm
Forum: General discussion
Topic: OSD (on screen display) w/o X
Replies: 44
Views: 12973

Re: OSD (on screen display) w/o X

Sorry to revive this old thread.
Is it possible to update libvgfont to accept unicode characters?
by fredfs
Sun Mar 05, 2017 6:49 pm
Forum: Graphics programming
Topic: Pi as public display screen
Replies: 4
Views: 4871

Re: Pi as public display screen

I am looking for something like this. Do you mind sharing the code? Hi folks, Thanks for the advice. In the end for various reasons I decided to write my own thing from scratch using libx11. Seems to be doing what I need which is basically checking for a message left in a file in /tmp every few seco...
by fredfs
Wed Dec 21, 2016 11:21 pm
Forum: General discussion
Topic: no allow-hotplug eth0 on jessy /etc/network/interface ?
Replies: 1
Views: 1886

no allow-hotplug eth0 on jessy /etc/network/interface ?

I see that the stock /etc/network/interfaces has no entry like:
allow-hotplug eth0
ou
auto eth0

Why ?
What is the default behavior when no option like these is set?

Is there any problem adding allow-hotplug eth0? I still want dhcpcd to handle dynamic or static ip settings.
by fredfs
Wed Dec 14, 2016 12:25 pm
Forum: Graphics programming
Topic: hello_video hack...
Replies: 6
Views: 3016

Re: hello_video hack...

Is it possible to tweak it a bit more to accept layer number as argument on the command line? :idea:
by fredfs
Mon Nov 28, 2016 3:06 am
Forum: Graphics, sound and multimedia
Topic: youtube-dl and omxplayer
Replies: 5
Views: 3142

youtube-dl and omxplayer

I have been testing youtube-dl inside the pi, most of the time it downloads and gerenates a playable movie but sometimes the file youtube-dl creates is not playable by omxplayer. " Vcodec id unknown: a8" I dont know what are the omxplayer limitations in terms of codecs. Any recipe to youtube-dl alwa...
by fredfs
Mon Nov 28, 2016 3:05 am
Forum: Graphics, sound and multimedia
Topic: DAC vs usb soundcard
Replies: 7
Views: 6303

Re: DAC vs usb soundcard

Try yourself to open a music wav file, downsample it to 6 bits, and listen to the crap result. This is not what you hear in raspberry analog out. It is not audiophile 7th wonder, but you cannot say it is 6 bit, it IS 16 bit, with quality compared to most mobile phones audio output. The 'only' way to...
by fredfs
Mon Jun 27, 2016 5:29 pm
Forum: General discussion
Topic: RPi3 jessie - NPTD does not work
Replies: 35
Views: 9045

Re: RPi3 jessie - NPTD does not work

Do I need to remove npt, ntpd and disable theier services from systemd? If you can't get ntpd to run take a look at htpdate. http://www.vervest.org/htp/ which doesn't use any special ports, it gets the time over regular http (port 80). That's available to install using sudo apt-get update; sudo apt-...
by fredfs
Tue May 10, 2016 12:28 pm
Forum: Advanced users
Topic: Omxplayer Audio Shutters
Replies: 0
Views: 325

Omxplayer Audio Shutters

Using command line omxplayer with 720p-1080p/25fps (~4minutes) mp4 videos, I have been suffering with frequent audio grasps/shuttering every ~3minutes. Is there any omxplayer option flag , or /boot/config.txt line I could try fix it? As of now I am using stock foundation's raspbian lite (no desktop)...
by fredfs
Thu May 05, 2016 2:16 pm
Forum: Graphics programming
Topic: Kill the CLI frambebuffer
Replies: 5
Views: 2197

Re: Kill the CLI frambebuffer

Omxplayer has a strage behavior when on negative layer (example -10), if there is a tranaprant png layer over it, you dont see omxplayer layer. If omxplayer is on layer zero or above, you can render transparent png over it without problems.
Why?
by fredfs
Thu Apr 21, 2016 3:35 am
Forum: Graphics programming
Topic: Kill the CLI frambebuffer
Replies: 5
Views: 2197

Re: Kill the CLI frambebuffer

How can I kill the tty1 framebuffer or prevent it from starting at all?
by fredfs
Wed Apr 20, 2016 4:40 pm
Forum: Graphics programming
Topic: Kill the CLI frambebuffer
Replies: 5
Views: 2197

Kill the CLI frambebuffer

Hello, I would like to play images and videos, and use negative frambeffer numbers (example, omxplayer --layer '-10')
But the command prompt at frambuffer 0 stays on top of negative buffer.
I dont use the command prompt, how can I kill it, or prevent it from starting at all?
by fredfs
Wed Apr 13, 2016 3:45 pm
Forum: HATs and other add-ons
Topic: Power Solder
Replies: 2
Views: 669

Power Solder

I need to solder the power cable to the PI but still PASS trought the fuse.
Is it possible?

I dont want to bypass the fuse (like the GPIO instructions I have found).

Thank you!
by fredfs
Fri Apr 08, 2016 8:44 pm
Forum: Bare metal, Assembly language
Topic: execute binary at boot
Replies: 0
Views: 516

execute binary at boot

I need to add a binary file (gpu related code) inside the /boot partition, and execute it at boot, when the GPU is avaliable.
How is this possible?
by fredfs
Tue Mar 15, 2016 2:12 am
Forum: Graphics, sound and multimedia
Topic: Pi Zero Unicorn Hat FFT audio visualizer
Replies: 2
Views: 3359

Re: Pi Zero Unicorn Hat FFT audio visualizer

can we make this ncurses?
by fredfs
Mon Mar 14, 2016 6:23 pm
Forum: Graphics, sound and multimedia
Topic: Graphics demo: Farbwellenraum
Replies: 2
Views: 814

Re: Graphics demo: Farbwellenraum

Is there a source code on github?
by fredfs
Mon Mar 14, 2016 6:19 pm
Forum: Graphics, sound and multimedia
Topic: Omxplayer Playlist Buffer
Replies: 0
Views: 1054

Omxplayer Playlist Buffer

Hello, I am using omxplayer on a command line only raspbian setup to play a folder of mp4 movies with sound. My bash script loads a playlist.txt file and start looping over the listed files. It works but there is a notorious gap between files. Is there any way to avoid this gap, or in some way pre-b...
by fredfs
Wed Mar 09, 2016 7:24 pm
Forum: Graphics, sound and multimedia
Topic: hello_audio
Replies: 1
Views: 569

hello_audio

Are there more hello_audio examples? I want to use it to create some interface sounds, can anybody help me make it play a simple "click" sound instead of the looping siren?
by fredfs
Mon Mar 07, 2016 2:50 pm
Forum: Graphics, sound and multimedia
Topic: Boot Sound
Replies: 8
Views: 1982

Re: Boot Sound

Thats is too late, I was looking for something as soon as the initial boot stage. Maybe using hello_audio code? When testing some setups, I use a similar idea, although often a video (no sound) but audio works fine too. Using omxplayer is a good idea, as it doesn't depend on the state of alsa. Alsa ...
by fredfs
Fri Feb 26, 2016 12:15 pm
Forum: Graphics, sound and multimedia
Topic: Boot Sound
Replies: 8
Views: 1982

Re: Boot Sound

Desktop speakers...

Does it really matter?
by fredfs
Tue Jan 26, 2016 2:53 pm
Forum: Graphics, sound and multimedia
Topic: Boot Sound
Replies: 8
Views: 1982

Re: Boot Sound

Maybe your only help would be using a DAC, like Hifyberry, that does not suffer electric interference?
by fredfs
Fri Jan 22, 2016 12:01 pm
Forum: Graphics, sound and multimedia
Topic: Boot Sound
Replies: 8
Views: 1982

Boot Sound

I am trying to have a boot sound on my pi robot. So when the power in on, something comes out from speakers connected to the analog audio output. So far I have all these lines on the very first rc boot script (rcS) /usr/bin/omxplayer -o local /home/bootsound.wav and /usr/bin/aplay /home/bootsound.wa...
by fredfs
Sat Dec 26, 2015 2:58 pm
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi DAC (Hifiberry, PiFi Dac, and others).
Replies: 5
Views: 3524

Re: Raspberry Pi DAC (Hifiberry, PiFi Dac, and others).

Courious about what are the differences between HifiBerry, PIFI and IQaudIO dac, if any
by fredfs
Sat Dec 26, 2015 4:58 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi DAC (Hifiberry, PiFi Dac, and others).
Replies: 5
Views: 3524

Raspberry Pi DAC (Hifiberry, PiFi Dac, and others).

Hello. I am looking for some advice on what is a good DAC for the Raspberry Pi. The cheapest I can find, is the chinese " Pifi DAC" wich is supossed to work with the same drivers the Hifiberry works. Any one had the oportunity to test it? Are they worth? Second there are the Hifiberry, wich seems to...

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