Search found 40 matches
- Mon May 04, 2020 10:02 am
- Forum: Troubleshooting
- Topic: Headless Pi3 B+ USB Boot hangs in left USB ports
- Replies: 10
- Views: 1998
Re: Headless Pi3 B+ USB Boot hangs in left USB ports
Have you found any solution for this problem ? I have the same symptoms. I have Rpi 3B+ with usb flash drive inserted in center USB port. Roughly one of five boots the Rpi3B+ doesn't start ethernet (no ethernet leds are on) and the flash drive is not present to the system. When I after that put usb ...
- Thu Apr 09, 2020 11:31 am
- Forum: Graphics programming
- Topic: Wait for V-Sync instead of eglSwapBuffer
- Replies: 0
- Views: 480
Wait for V-Sync instead of eglSwapBuffer
Hello. I use OpenGL ES 2.0 and at the end of each frame I usually call eglSwapBuffers to apply gl commands and wait for vsync to swap v-buffers. But sometimes in my app I don't need to redraw each frame each vsync (when nothings has changed) . I would like to save gpu power and heat produce with gpu...
- Thu Sep 07, 2017 10:57 am
- Forum: Graphics programming
- Topic: How to free unused dispmanx layer (in case of SIGSEGV)
- Replies: 7
- Views: 3836
How to free unused dispmanx layer (in case of SIGSEGV)
Hello. I have opengl app (using openframeworks). I try to solve the situation when my program receive SIGSEGV (or for debug purpose I send him SIGSEGV signal) the program do not free dispmanx layer (resource) and last state of this dispmanx layer is still present on display. When I run program again...
- Thu Dec 01, 2016 9:23 am
- Forum: OpenMAX
- Topic: omx_image stops working after latest rpi firmware update
- Replies: 2
- Views: 3658
omx_image stops working after latest rpi firmware update
Hello. I was happy using example omx_image https://github.com/brynthomas/omx_image for loading jpeg images directly to texture with help of OMX_UseEGLImage. But after rpi firmware update Commits on Oct4 2016 https://github.com/Hexxeh/rpi-firmware/commit/667cfabe63bc663383559ef88317e86f9bd41e45 it st...
- Sun Mar 29, 2015 11:58 am
- Forum: Advanced users
- Topic: Slow down Rpi 2 to work at same speed as Rpi B+
- Replies: 11
- Views: 2662
Re: Slow down Rpi 2 to work at same speed as Rpi B+
That is true. After slowdown frequency, restricted process to only one core, use the same amount of memory, the new raspi 2 is still more powerfull than old Raspi.(especially in video/image decoding). It is really with help of 512kb L2 cache and use of NEON instructions. I compared it when switching...
- Fri Mar 27, 2015 9:04 am
- Forum: Advanced users
- Topic: Slow down Rpi 2 to work at same speed as Rpi B+
- Replies: 11
- Views: 2662
Re: Slow down Rpi 2 to work at same speed as Rpi B+
I even tried to setup on Rpi 2 in /boot/config.txt arm_freq=600 sdram_freq=400 but Rpi2 is still faster than Rpi. I notice first difference in cache reading from SD card (same SDcards): On Rpi2 and Rpi is emmc clock same : vcgencmd measure_clock emmc frequency(47)=250000000 On Rpi2: hdparm -t /dev/m...
- Fri Mar 27, 2015 7:22 am
- Forum: Advanced users
- Topic: Slow down Rpi 2 to work at same speed as Rpi B+
- Replies: 11
- Views: 2662
Re: Slow down Rpi 2 to work at same speed as Rpi B+
It is my mistake. Sorry for misreading. When I put it into the cmdline.txt it works now.
It is better now. But processor speed is still quicker than Rpi B and this is still visible.
Is there a way how to underclock the 900Mhz cpu to 700Mhz.
It is better now. But processor speed is still quicker than Rpi B and this is still visible.
Is there a way how to underclock the 900Mhz cpu to 700Mhz.
- Fri Mar 27, 2015 6:55 am
- Forum: Advanced users
- Topic: Slow down Rpi 2 to work at same speed as Rpi B+
- Replies: 11
- Views: 2662
Re: Slow down Rpi 2 to work at same speed as Rpi B+
I have try isolcpus=1,2,3 in config.txt do the reboot and no change top says: top - 08:45:08 up 10 min, 1 user, load average: 0.71, 0.38, 0.19 Tasks: 83 total, 1 running, 82 sleeping, 0 stopped, 0 zombie %Cpu0 : 1.0 us, 4.5 sy, 0.0 ni, 81.7 id, 12.8 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 : 1.0 us, 17.6 sy...
- Thu Mar 26, 2015 1:08 pm
- Forum: Advanced users
- Topic: Slow down Rpi 2 to work at same speed as Rpi B+
- Replies: 11
- Views: 2662
Slow down Rpi 2 to work at same speed as Rpi B+
Hello. Sounds strange. But is there a way how to slow down the Rpi 2 (cpu frequency, disable quad cores, get rid of 512mb of ram) to work at speed similar to Rpi B+. I have project playing several video files and switching between them and Rpi 2 is visibly faster in that than old Rpi B+. In some cas...
- Thu Oct 02, 2014 4:15 am
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: 3.5" Capacitive touch panel for I2C or SPI
- Replies: 2
- Views: 1121
Re: 3.5" Capacitive touch panel for I2C or SPI
Thanks for the link. But there are only the resistive touch panels. I'm asking the forum because I've tried before to find(ebay, farnell, ...) some capacitive touch panel on the web, but i wasn't succesful. What i found was on http://www.alibaba.com/product-detail/3-5-transparent-glass-touch-screen_...
- Wed Oct 01, 2014 12:03 pm
- Forum: Interfacing (DSI, CSI, I2C, etc.)
- Topic: 3.5" Capacitive touch panel for I2C or SPI
- Replies: 2
- Views: 1121
3.5" Capacitive touch panel for I2C or SPI
Hello. For my project I'm trying to find 3.5" capacitive touch panel (digitizer) but without display. Just only the touch layer. It would be great if I can communicate with this touch layer by I2C or SPI interface and read out the thumb position. Does anybody have some tips where this kind of e...
- Thu May 22, 2014 9:54 am
- Forum: OpenGLES
- Topic: Wait for V-SYNC without swap buffers
- Replies: 0
- Views: 2203
Wait for V-SYNC without swap buffers
Hello. I found out when VideoCore is too hot it slows down. In my main rendering thread when I don't need to do render I just use usleep and wait defined time instead of render the frame and call eglSwapBuffers. So I don't do rendering when I don't need it and Videocore cools down. I use main render...
- Tue Apr 15, 2014 7:24 am
- Forum: Troubleshooting
- Topic: STICKY: Setting up HDMI output when video output is wrong.
- Replies: 608
- Views: 1087467
Re: Setting up HDMI output
Hello. I use HDMI display without sound in HDMI. I would like to use resolution is 1280x800 @ 50Hz . This is not the standard resolution so I added new custom mode "hdmi_cvt=1280 800 50 5 0 0 0" to /boot/config.txt and "hdmi_group=2", "hdmi_mode=87". The custom mode is ...
- Fri Dec 20, 2013 12:49 pm
- Forum: OpenMAX
- Topic: Limits of videocore IV hw decoding
- Replies: 3
- Views: 3745
Limits of videocore IV hw decoding
Hello. I'm trying to find out some information about limits of allowed image resolution and specifications of file formats allowed for use with broadcom hw decoder (JPEG, MPEG4, H264). About JPEG images it is the maximal image resolution and description of allowed JPEG internal format. About the vid...
- Mon Aug 26, 2013 7:41 am
- Forum: OpenMAX
- Topic: Correct cleanup after video playing in videocube example
- Replies: 2
- Views: 1904
Re: Correct cleanup after video playing in videocube example
Thanks for that. I solve the callback issue with similar code. But disable the component state transition to OMX_StateLoaded is not a solution. I can call exit func instead an this will result with the same effect. I want in my code to fast open new video file without destroying all omx elements and...
- Mon Aug 12, 2013 7:01 am
- Forum: OpenMAX
- Topic: Correct cleanup after video playing in videocube example
- Replies: 2
- Views: 1904
Correct cleanup after video playing in videocube example
Hello. In examples hello_videocube and hello_teapot there is not correctly done the code which does finishing and cleaning up. The examples uses egl render component to render video to egl image. I've tried to fix it up but I'm not omx skilled to find the solution. The first strange thing above the ...
- Wed Jun 26, 2013 4:50 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
The question is if it is problem with gstreamer (gst-plugins-bad, gts-omx) or raspi firmware. Whom to I need to report this ?Defiant wrote:hmm I still can not reproduce it.
Please make a bugreport.
- Mon Jun 24, 2013 4:05 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
I've tried to go back with firmware to the same version as you did but output is still distorted.Defiant wrote:strange..now it works with the latest version..what is going on here?
No matter if I use old or new firmware.
- Fri Jun 21, 2013 11:45 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
strange, don't have that. I've tried to recompile just only plugin gst-omx branch 1.0 from git with the same distorted output result. For more info this is the -v output. I would be glad if you can compare it with yours. marty@raspberrypi ~ $ gst-launch-1.0 -v filesrc location= /opt/tpictures/jpg/R...
- Thu Jun 20, 2013 11:36 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
Just tested, yes works. Did you include the imagefreeze element? I tested with this jpeg: http://wiki.openelec.tv/images/b/be/Raspberry-Pi-logo.jpg Yes. I use the same command as you. Now I've tested it with the same jpeg as you on raspi with clean raspbian (install, update, upgrade, reboot). Now y...
- Thu Jun 20, 2013 8:03 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
Just try the element in a pipeline: gst-launch-1.0 -v filesrc location=testimage.jpg ! decodebin ! imagefreeze ! autovideosink decodebin should automatically call the omx element. The option -v will print the element decodebin used. For help try the mailing list: http://lists.freedesktop.org/mailma...
- Thu Jun 20, 2013 6:02 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
I want to ask about gst-omx if it is able to decode jpeg pictures (stills). I know that there is omxmjpegdec but I can not find out if it can do the image jpeg decoding. I want to build application for browsing the images and video files and it would be perfect if it all can be done with gstreamer h...
- Tue Jun 18, 2013 10:50 am
- Forum: Graphics, sound and multimedia
- Topic: gstreamer openmax
- Replies: 263
- Views: 145874
Re: gstreamer openmax
Can I understand that omxmjpegdec can also decode jpeg pictures ? In that case I can not find out the proper gst-launch-1.0 pipeline to test it.m][sko wrote:something for mjpeg ?cmarty wrote:Does anybody know if there is a plan to add to gst-omx the element for decoding jpeg pictures with openmax library ?
- Tue Jun 18, 2013 10:38 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
That is now clear to me. Thanks Defiant for the info.Defiant wrote:egl.h didn't exist yet in the version I compiled.
I'm currently waiting for a 1.0.8 release for a recompile.
- Tue Jun 18, 2013 9:08 am
- Forum: Raspberry Pi OS
- Topic: Gstreamer 1.0 for raspbian
- Replies: 171
- Views: 144325
Re: Gstreamer 1.0 for raspbian
In case of missing files during compilation the Debian package content search usually comes in handy: http://www.debian.org/distrib/packages Try aptitude install libegl1-mesa-dev libgles2-mesa-dev as it is done here: https://github.com/matthiasbock/gstreamer/issues/6 That's true that those packages...