Search found 129 matches
- Thu Jun 11, 2015 2:15 pm
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: Baby monitor with sound, video and more
The soundcard driver initialises and starts the appropriate master clock on GPCLK0 that drives the ADC. As the sample rate is fixed the settings for GPCLK0 are fixed as well. The code is just a copy-paste from I2S driver with the only change for the appropriate memory addresses for control registers...
- Wed Feb 25, 2015 4:28 pm
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: AAC encoder
compile ffmpeg with aac support and use "-c:a aac" in the output part of ffmpeg command. see my example above.PedroGil91 wrote:Hi I´d like to know if i can use ffmpeg just for encoding audio in AAC
thanks
- Wed Aug 06, 2014 12:53 pm
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: Baby monitor with sound, video and more
Where can I get the Schematic an code to this project? Don't feel like re-inventing the wheel! The purpose of the project was to re-invent baby cameras in order to understand how the damn thing can be built. :D Since then there has been significant development in Raspbian and Pi peripherals market....
- Sun Jul 27, 2014 9:35 pm
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: Baby monitor with sound, video and more
/usr/bin/ffmpeg -y \ -analyzeduration 100000 \ -v debug -fflags +nobuffer \ -r 25.126 \ -i /home/pi/live.h264 \ -f alsa -ar 32000 -ac 2 -i hw:1,0 \ -c:v copy \ -strict -2 \ -c:a aac -b:a 64k -ac 1 \ -f mpegts udp://224.0.0.1:5000?ttl=4&pkt_size=1400 This is multicast udp stream. Obviously you w...
- Tue Jul 22, 2014 11:08 am
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: Baby monitor with sound, video and more
Jamesth, if ffmpeg works for you stick with it. I assume you compile it from the sources. You don't need ffserver, ffmpeg can easily stream or output files that a web server can further deliver to the clients. I think you first need to decide what clients to use and then their capabilities. In my ca...
- Wed Mar 12, 2014 10:37 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
Hello , i'm interested in sampling an analog audio signal , and acquire it with i2s bus on raspberry . I saw the c code posted by dariush ( http://www.raspberrypi.org/phpBB3/viewtopic.php?t=8496 ) but that was written before the RPi included the P5 connector. Is there a working example of a communi...
- Wed Mar 12, 2014 12:00 am
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
jotun, building the modules is the easy bit. The problem is that no generic platform devices are defined in bcm2708.c you can take a shortcut and define the platform devices for your card and codec in their drivers but that is a very bad style. alternatively, add generic devices ("sound card&qu...
- Mon Mar 10, 2014 11:06 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
Not sure why rpi-mbed is not in the stock kernel, I think it was generic enough.
Unfortunately, the only driver with capture link in the official kernel is "snd-hifiberry-digi" with wm8804 codec. But that is SPDIF.
Unfortunately, the only driver with capture link in the official kernel is "snd-hifiberry-digi" with wm8804 codec. But that is SPDIF.
- Mon Dec 23, 2013 5:12 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
BBUK, I think you need to set bitclock (frame length) in the card driver. There's a new function in 3.10.
- Sun Dec 22, 2013 1:29 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
rpi-dac is a generic driver that will provide output with many non-configurable NOS DACs in slave mode. i think we also need a generic in/out driver and one for RPi as slave. that should cover about 80% of use cases.
- Thu Dec 19, 2013 10:13 am
- Forum: Advanced users
- Topic: Broadcom chipset C code
- Replies: 16
- Views: 3205
Re: Broadcom chipset C code
For uniform addressing of all control registers, perhaps. There will be different shifts for other controls.
- Wed Dec 18, 2013 12:37 pm
- Forum: Off topic discussion
- Topic: What watch brand is better?
- Replies: 18
- Views: 4422
Re: What watch brand is better?
This is Raspberry Pi forum, not D-Wave Two!paulie wrote:I have seen a Breitling Hospitality area at RIAT in the past.
If you can afford a Breitling, you can probably afford Airshow tickets:-)

- Wed Dec 18, 2013 12:15 am
- Forum: Graphics, sound and multimedia
- Topic: Wiring Raspberry and amplifier not USB
- Replies: 3
- Views: 1835
Re: Wiring Raspberry and amplifier not USB
I don't recommend powering from RPi. It's dangerous and too noisy for audio.
- Wed Dec 18, 2013 12:07 am
- Forum: Graphics, sound and multimedia
- Topic: Generating SMPTE timecode on the 3.5mm jack
- Replies: 8
- Views: 8257
Re: Generating SMPTE timecode on the 3.5mm jack
Why do you need to send data to output 25 times per second? I mean it's a known sequence so you can prepare a couple of seconds worth data and write it to the device less regularly. Or am I missing something?
- Mon Dec 16, 2013 2:10 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
not really a copy-paste as the name of platform device was changed. you will need to change it in card dai definition in card driver. don't forget to add platform devices for card and codec in bcm2708.c (same as for hifiberry that is already defined there)
- Mon Dec 16, 2013 11:53 am
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
build kernel version 3.10. you might have some issues after upgrading Pi to 3.10 and then running experimental 3.8 kernel.
just use rpi-3.10.y-asoc branch in git
just use rpi-3.10.y-asoc branch in git
- Wed Dec 11, 2013 3:23 pm
- Forum: Other projects
- Topic: RaspberryPi with stereoscopic vision
- Replies: 9
- Views: 3588
Re: RaspberryPi with stereoscopic vision
Anyone who has made USB 2.0 webcam work at FullHD in mjpg mode at 25-30 fps, raise your hand!
No hands? I thought so...
No hands? I thought so...
- Thu Nov 28, 2013 11:56 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
Morpheus, you should understand that Florian doesn't write drivers for DACs he doesn't have. Simply because they can't be tested. Having said that, most simple connections (not involving i2c or SPI) should work with a driver that already exists. A change of slave-master configuration and the set of ...
- Tue Nov 26, 2013 12:33 pm
- Forum: General programming discussion
- Topic: Run terminal command from webpage
- Replies: 15
- Views: 18309
Re: Run terminal command from webpage
check out RaspCtl
- Tue Nov 26, 2013 12:28 pm
- Forum: Raspberry Pi OS
- Topic: Slow samba performance / timeout while copying of large file
- Replies: 7
- Views: 3628
Re: Slow samba performance / timeout while copying of large
Buffering makes sense because writing to USB HDD is a slow process. I bet you will see high waiting % in top. Remember, your USB subsystem is stressed twice with the same data, so when receiving it can't write at the same time.
- Tue Nov 26, 2013 11:19 am
- Forum: Graphics, sound and multimedia
- Topic: Resource light streaming of ALAC files to Airport Express
- Replies: 1
- Views: 918
Re: Resource light streaming of ALAC files to Airport Expres
Interesting, will look at it next week when back home.
- Tue Nov 26, 2013 11:13 am
- Forum: OpenGLES
- Topic: HDMI output with color depth more than 24bit
- Replies: 3
- Views: 3455
Re: HDMI output with color depth more than 24bit
If you have a device that is capable of correctly displaying 24bits I bet it's not a cheap RPi you're going to connect to it. Why bother about 36bits if all you see is 6 per channel?
- Mon Nov 25, 2013 7:55 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: STICKY: The I2S sound thread. [I2S works]
- Replies: 1001
- Views: 576249
Re: I2S: Anyone got it running? (answer is yes!)
I believed in you! :D Sorry, I haven't tested yet and will have to postpone testing to next week. I'm still struggling to see the point of forcing different frame lengths for different sampling rates. I don't think that there are many DAC/ADC that would accommodate that (NOS in slave mode, perhaps),...
- Mon Nov 25, 2013 3:22 pm
- Forum: Raspberry Pi OS
- Topic: Slow samba performance / timeout while copying of large file
- Replies: 7
- Views: 3628
Re: Slow samba performance / timeout while copying of large
Slow samba?
Oh, they must have called it sarabande.
Invented in hell, as Cervantes once said.
In short, don't use it.


In short, don't use it.
- Fri Nov 22, 2013 9:58 pm
- Forum: Graphics, sound and multimedia
- Topic: Baby monitor with sound, video and more
- Replies: 20
- Views: 29660
Re: Baby monitor with sound, video and more
Eugene, with all respect, these solutions don't offer anything better than SeNS already has. I find ffserver useful only when there is need to provide many different streams, which RPi anyway is not capable of producing. aac encoding on the fly is extremely heavy, I don't get the reason for encoding...