Go to advanced search

by 6by9
Mon Jun 24, 2019 8:43 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 278
Views: 12214

Re: Raspberry Pi 4 Thread - general discussion

Some DVB-T TV channels use MP2 (e.g. in Sweden) and this could mean that playback is worse on Pi 4 B than on Pi 3 B+. I have not bought a license key for MP2 so I'm not using the hardware decoder anyway. I use e.g. VLC to watch TV using TVHAT on Pi 3 B. Denmark, which is close to where I live, uses...
by 6by9
Mon Jun 24, 2019 6:53 pm
Forum: Troubleshooting
Topic: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?
Replies: 14
Views: 2092

Re: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?

tyon2006 wrote:
Mon Jun 24, 2019 5:48 pm
Adding those values makes the screen go black and OS fail to boot. I'll try a couple different translations.
I suspect that it's trying to compose and transpose to 1440x2560 then, and do no scaling on the render. I'll try and confirm that tomorrow.
by 6by9
Mon Jun 24, 2019 6:50 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 278
Views: 12214

Re: Raspberry Pi 4 Thread - general discussion

No. The H265 decoder is currently accessed via a modified FFmpeg, it doesn't touch the GPU at all. It is effectively open, therefore there is no need to insert IL or MMAL or any other API in the way. Pity, as that precludes using the various bits of the pipeline to do stuff with -- resize, etc. -- ...
by 6by9
Mon Jun 24, 2019 6:46 pm
Forum: Bare metal, Assembly language
Topic: Detecting if HDMI present
Replies: 17
Views: 13148

Re: Detecting if HDMI present

Any updates regarding the new RPi 4? The latest dts is not yet available https://github.com/raspberrypi/firmware/blob/master/extra/dt-blob.dts On the Pi4 the hotplug line is a dedicated GPIO going into the HDMI block. Currently there is no way to read it directly, but it's likely to be added as I w...
by 6by9
Mon Jun 24, 2019 5:40 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 278
Views: 12214

Re: Raspberry Pi 4 Thread - general discussion

One question, which I have a feeling 6by9 is going to hate me for: is it / will it ever be possible to drive the H.265 decoder (with all that that entails, regarding pumping that extra data through the rest of the stack) via OpenMAX? No. The H265 decoder is currently accessed via a modified FFmpeg,...
by 6by9
Mon Jun 24, 2019 5:34 pm
Forum: Troubleshooting
Topic: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?
Replies: 14
Views: 2092

Re: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?

I'm a novice, so I'll ask a novice question. Should I give up on using this display, or could I reduce the screen's display resolution to keep the aspect ratio and orientation without exceeding the 1920 limit? I assume that would be a 1920x1080 resolution, but I'm not sure how to manipulate the set...
by 6by9
Mon Jun 24, 2019 5:32 pm
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 361
Views: 39529

Re: Multiple Frame buffer beta testers wanted

Hi, Great to see the new RPi 4 and the upgrades on Raspbian to support multi screens. It has been mentioned that multiscreen will be compatible with RPi 3, however I have just now do a dist-upgrade and I do not see Screen Configuration app under Preferences. Is there anything I am missing? Any advi...
by 6by9
Mon Jun 24, 2019 3:30 pm
Forum: Graphics programming
Topic: PI 4 Dispmanx/vc compatibility
Replies: 3
Views: 130

Re: PI 4 Dispmanx/vc compatibility

Dispmanx is still there with FKMS (or legacy).
There is only h265 decode, not encode. The existing h264 encode and decode are still there, unchanged.
by 6by9
Mon Jun 24, 2019 3:08 pm
Forum: Graphics, sound and multimedia
Topic: Video system for a church project
Replies: 3
Views: 86

Re: Video system for a church project

thanks 6by9. I am not precious about using EasyWorship - so I might look into OpenLP or similar. Would I just use a combination of VLC server and player to get the projectors up and running? EasyWorship looks significantly more powerful than OpenLP, but the latter is open source so you can hack it ...
by 6by9
Mon Jun 24, 2019 2:44 pm
Forum: Beginners
Topic: raspberry pi 4 and vga666
Replies: 3
Views: 167

Re: raspberry pi 4 and vga666

It does.
by 6by9
Mon Jun 24, 2019 2:43 pm
Forum: Troubleshooting
Topic: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?
Replies: 14
Views: 2092

Re: 2k Portrait Mode HDMI Display 1440p (1440x2560) how to rotate into Landscape?

The transposer hardware block is limited to widths (pre-transpose) of 1920 pixels (height of 4095 pixels). Your landscape frame is 2560 pixels wide, therefore exceeds this limitation and will fail. (This limitation is also present on the Pi4 transposer, so we are considering whether composing with t...
by 6by9
Mon Jun 24, 2019 2:32 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 278
Views: 12214

Re: Raspberry Pi 4 Thread - general discussion

The MPEG2/VC1 license key pages should have an update to say (in bold) that they do not work for RP4 (and, ideally, why) http://www.raspberrypi.com/mpeg-2-license-key/ http://www.raspberrypi.com/vc-1-license-key/ Yes, it was raised last week, but obviously the right person hasn't been proded yet. P...
by 6by9
Mon Jun 24, 2019 1:32 pm
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 361
Views: 39529

Re: Multiple Frame buffer beta testers wanted

How many display can be conencted to a RPi4? It has DSI + 2x HDMI + DPI I assume DSI + DPI is still a now go or are the hardware restrictions gone now? Speaking of an RPi 4 is it possible now to use both HDMI outputs + DSI? Sorry, but as I don't have a RPi4 on hands (as I will wait for the 4GB vesr...
by 6by9
Mon Jun 24, 2019 1:16 pm
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 278
Views: 12214

Re: Raspberry Pi 4 Thread - general discussion

3D MVC? What is that? 3D MVC = 3D Multi View Coding. It's the extension to h.264 that is used in 3D Blu-rays, and which previous models of Raspberry Pis have supported decoding ofwithin Kodi. Also - allied to this - is a question as to whether the HDMI outputs still support HDMI 1080p24 Frame Packe...
by 6by9
Mon Jun 24, 2019 1:00 pm
Forum: Graphics, sound and multimedia
Topic: Video system for a church project
Replies: 3
Views: 86

Re: Video system for a church project

Checking the specs of EasyWorship, I suspect that is your limitation. https://support.easyworship.com/support/solutions/articles/6000047711 EasyWorship uses the Windows Extended Desktop for displaying live output to front of house, foldback and alpha channel monitors. ... Unsupported Software & Hard...
by 6by9
Mon Jun 24, 2019 11:36 am
Forum: General discussion
Topic: Pi Store
Replies: 2
Views: 102

Re: Pi Store

by 6by9
Mon Jun 24, 2019 11:34 am
Forum: Advanced users
Topic: How to correctly set up v4l2 (m2m) under 64-bit kernel / 64-bit userland?
Replies: 10
Views: 986

Re: How to correctly set up v4l2 (m2m) under 64-bit kernel / 64-bit userland?

I'm getting a bunch of errors in dmesg (20-22 lines) while starting playback and a few such errors during playback: ... [ 6600.658148] vc_sm_cma_import_dmabuf_internal: Expecting an uncached alias for dma_addr 0x4ab00000 [ 6600.680280] vc_sm_cma_import_dmabuf_internal: Expecting an uncached alias f...
by 6by9
Mon Jun 24, 2019 10:15 am
Forum: General discussion
Topic: Multiple Frame buffer beta testers wanted
Replies: 361
Views: 39529

Re: Multiple Frame buffer beta testers wanted

As an extension to what James has posted, whilst the legacy driver creates /dev/fb0 and /dev/fb1, DRM/KMS creates a combined framebuffer under /dev/fb0. You can then control what proportion of that framebuffer shows on each display either via libdrm, or under X you'll find xrandr allows easy control...
by 6by9
Mon Jun 24, 2019 9:43 am
Forum: Graphics, sound and multimedia
Topic: Raspberry Pi and 4k @ 15Hz
Replies: 123
Views: 156647

Re: Raspberry Pi and 4k @ 15Hz

Well, our troubles are gone... The new Raspberry Pi 4 supports 4K out of the box, no hacks required. We just tested it with a dual 4K+1080p setup and it works fine. However, it does seem that the HVS is much more loaded and the memory bandwidth gets saturated fast when using multiple DispmanX layer...
by 6by9
Mon Jun 24, 2019 7:38 am
Forum: Graphics, sound and multimedia
Topic: Real Time Transcoding of DVB TV Streams
Replies: 314
Views: 102515

Re: Real Time Transcoding of DVB TV Streams

Would be great if new rpi4 has the capabilities to support this. Even greater if HEVC codec is selectable for encoding Hevc is decode only on the pi4. We are chasing down an issue that only showed up in the last few days where simultaneous encode and decode with the h264 codec block stalls. We're a...
by 6by9
Mon Jun 24, 2019 7:04 am
Forum: General discussion
Topic: Do we get Vulkan on Pi 4?
Replies: 2
Views: 891

Re: Do we get Vulkan on Pi 4?

Not at the moment, but the possibility is being explored.
by 6by9
Sun Jun 23, 2019 7:02 am
Forum: Graphics, sound and multimedia
Topic: HDMI Display Problems with Pi 3A+ and LS060R1SX01 screen
Replies: 1
Views: 159

Re: HDMI Display Problems with Pi 3A+ and LS060R1SX01 screen

You don't want to change the hdmi_timings - those are what the monitor sees, and it will only accept certain modes. Display_rotate=1 should automatically flip framebuffer_width and height from the defined hdmi mode. The issue I suspect you are hitting is that the transposer (the hardware block that ...
by 6by9
Fri Jun 21, 2019 5:29 pm
Forum: Graphics, sound and multimedia
Topic: HDMI to CSI-2 via TC358743 on kernel 4.1
Replies: 580
Views: 174446

Re: HDMI to CSI-2 via TC358743 on kernel 4.1

Hi 6by9, thank you for your quick reply. I checked back today, and it works as expected. I must have forgot to set the timing query or EDID after RPi booted up. I apologize for asking the question before giving it a second try. Is it also possible to capture a still (one frame) using yavta? Thank y...
by 6by9
Fri Jun 21, 2019 4:43 pm
Forum: OpenMAX
Topic: Which OMX_IMAGE_CODINGTYPE are actually supported?
Replies: 2
Views: 1258

Re: Which OMX_IMAGE_CODINGTYPE are actually supported?

You've commented on a post that is 6 years old!

And you just ask the component for the supported formats via OMX_IndexParamImagePortFormat (or the variant for the relevant domain).

If you have an issue with particular decodes, then please start a new thread, and ideally provide a simple test case.
by 6by9
Fri Jun 21, 2019 2:22 pm
Forum: Camera board
Topic: Way of Detecting Bad Frame on MIPI Line?
Replies: 2
Views: 150

Re: Way of Detecting Bad Frame on MIPI Line?

It depends on what the data packet is. MIPI has Frame Start (FS), Frame End (FE), Line Start (LS), and Line End (LE) short packets. The peripheral can also produce a line count interrupt (LC) every N lines. LS and LE short frames do contain line numbers, and FS and FE contain frame numbers, but very...

Go to advanced search