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atharmian

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Everything posted by atharmian

  1. jernej, Maybe the simultaneous, different video outputs are not really a HW acceleration issue ( GPU oriented), but a video software one? I just saw this video, 2min ( screens show on 1: 30min), where VLC is streaming multiple, different videos on same screen: https://m.youtube.com/watch?v=NKEm2QbYgck My friend just told me that on his Mac, he opened 8 windows, 5 under QuickTime, 3 under VLC, and they all were running different videos. The audio sounded a garbled mix of all 8 outputs ! So if this is true, perhaps most HW acceleration has this capability baked in? And diff display outputs can also be used, e.g. HDMI + TVout + USB on OPi PC Plus etc? tkaiser, What might legacy kernel display init do here, as you pointed above?
  2. dgp, 4K movies on cheap cards? So video streaming isn't a big load, presumably because of HW accelerated video on Armbian so the CPU isn't affected? Any AliExpress/other links for cheapo 4GB or more cards?
  3. dgp, Can 4GB class 6 still work as SD card on OPi0?
  4. More questions: 1. With Uboot (and SPL signatures for SD card?) on 2MB SPI flash, do we still need "fast" SD memory? How about 4GB class 6? 2. Will this SPI facilitate "fixed" MAC address(es) for board identification by a remote process? It was suggested somewhere as a plus point for having such flash, along with bootloader. 3. Is there a way, cheaper than buying "fast" SD cards, to plug/solder eMMC type onboard 4-8GB memory? 4. With a bootloader in SPI 2MB flash on OPi0, what are the pros and cons of netbooting ?
  5. After almost resolving OPi0 PoE as passive only, I see U-boot as is looks controversial. So how could we "fix" Uboot SPL issue, or equivalent? Is 2MB enough for device specific initialization such that we could have device agnostic kernel/OS called from USB, WiFi, eMMC, SD et al? How about cycles affecting above media compared with SPI NOR? I remember tkaiser mentioning that there is now kernel support for eMMC, what was/is missing? Regardless, I do like the little 2MB holiday gift. And despite the issues, I have become a believer in OPi0+ Armbian as best price/perf thus far.
  6. hmartin, Good explanation. Your link , "Stages of powering..." comes empty. So essentially the 802.3 af option 3 is pointless, because OPi0 still sees 48V or so, and will need a power splitter for Ethernet data only (Ethernet port without power injection) and power routes. In which case the OPi0 linux-sunxi description should be amended to remove references to 802.3af capabilities ( power splitters can be used in all feed cases anyway.) OPi0 is just a passive PoE PD. Also the power injector part should be clarified to say only over short distances, 3-4m, given the 5V restriction.
  7. jernej, The device agnostic argument I understand. But there are 2 conflicting opinions here re: whether even 2MB is enough You are saying 1MB should suffice?
  8. dgp, Thanks, yes I had referred to your SPI NOR U-boot paragraphs. If 2MB is low, why should the PC2 have only 1MB, as I read online?
  9. Expansion Board on OPi0: what interfaces? OPi0 SPI 2MB flash bootloader configured? I just read this on OPi0 page on linux-sunxi.org: http://linux-sunxi.org/Xunlong_Orange_Pi_Zero "A cheap 'Expansion board' for this connector is now available exposing all interfaces (2 x USB, IR receiver, microphone and combined AV TRRS jack) and can be ordered together with the board on Aliexpress." But when I had emailed Steven@Xunlong some days ago re: $2 OPi0 Expansion Board, he seemed to say only 2xUSB and AV TRRS jack are available. (So I didn't order this expansion board.) 1. Can someone clarify? If in fact an IR receiver and a mic are available, wonderful (and sensible)! Is this a mic/ earphone- speaker combo, as shown on the official photo? Is the IR receiver behind the USB ports, and the ear/mic next to the AV port? 2.Is the SPI 2MB flash configured to "boot" now? Or will we need to follow the SPI NOR U- boot config instructions in the OPi description? Interestingly PC2 is said ( on Peter Scargill blog article on Nano Pi NEO) to have only 1MB flash installed...Tkaiser vs Pete comments. 3. Any status update on WiFi support in Armbian OS with legacy kernel or mainline ( being noob still can't differentiate which kernel will really work, and if we really need mainline kernel features)?
  10. hmartin, I only asked about the OPi0 as PoE injector for completeness: the Xunlong sunxi description mentions it in the last sentence. Of course as you say this won't be very useful, and can only go 3-4m with 5V. Also re: Option 3 ( 802.3af mode B ), I thought that if you soldered zero ohm resistors on the pads, the correct power ( no overvoltage) would be transmitted to the OPi0 board as PD from the Ethernet port, since there would be auto- negotiation. And the cat5 cable from the 802.3af injector, e.g., TP- Link, would go into this Ethernet port on the OPi0. But maybe not. The power splitter device usage I understand, but then this can also be used with non- PoE boards as PDs.
  11. hmartin, Thanks for taking time on this Xmas weekend. Well organized! Two questions: 1. For option 3, what do you need to solder onto the OPi0 pads? 48/57-5V buck or zero ohm? Also which pins to solder where ( clarification since this point isn't mentioned anywhere.) 2. Any clues on how to use OPi as PoE injector, passive or 802.3af/at compliant?
  12. gnasch, Thanks. My problem is that there is a lot of unofficial stuff that also works in many cases very affordably...Great, but lots of learning and caveats. 1. Quickly checked this gigabit splitter. Is there a cheaper Fast Ethernet,100 Mbps, one ? Now where do I get a good, cheap PSU for this stuff? Really, I would prefer a 24-5V PSU/ buck converter since this would be cheaper. 2. Also, any recommendations for a good, cheap USB/ CSI camera module with PoE? I mean besides OPi0? Or is OPi0 good/ cheap enough for Fast Ethernet? By module I mean a board that will stream video/audio with a few features, WiFi or PoE or both. CSI I am told has better SoC access and programmability, but is there a big difference between CSI on OPi models and plain old USB connectivity? Of course officially " passive" ( no negotiable controls) PoE is not standard, but over less than 4m, it looks great. And with that cheaper 24-5V power injector the standard but expensive 48-5V injector/ PSU can be avoided, over longer distances I assume. That is hacking
  13. I am confused myself as newbie as this is all with a lot of options/prices Bottom line is that OPi as other Chinese sources really are only using mode B ( power in the non-data Ethernet wire pairs) and are not really 802.3af/at compliant, to save money... I am going to ask all PoE questions once... Just looked at these tkaiser posts from 02 Nov onwards, and these summarize my views on the unmatched price/ performance of OPi0, now that the 2MB SPI flash is soldered and the WiFi driver works (?): https://forum.armbian.com/index.php/topic/2808-orange-pi-zero-went-to-the-market/ So assuming my use case with 4 OPi0 USB cam modules as PDs are used with 20-30m Eth cable lengths, 1. This AliExpress 802.3af item including PoE switch and PSU seems to say that nothing will burn out: 1 4 Port IEEE802.3af 10/100Mbps POE Switch Power Over Ethernet For IP Camera Network Switch VoIP Phone AP Devices Network Switch http://www.aliexpress.com/item/32605335058/32605335058.html If above is true, will I need to solder the PCB 57/48-5V expensive device to the OPi0 pads, as you suggested Dec 22, 3.01? The Xunlong sunxi page says- a 802.3af "converter": http://linux-sunxi.org/Xunlong_Orange_Pi_Zero#Powering_the_board 2. If above doesn't make sense, because of expense (that China 57/48-5V power splitter you mentioned still has to be used one each on each webcam module), think I should need: A. Estol power injector (as you kindly linked above.) But this is the 48V version, any 24V version? B. 24V PSU for Estol? C. 24-5V buck converter to solder on OPi0 pads ? 3. Why should I need a power splitter with OPi0 PD, or was that a generic reference on your part? 4. BTW, the micro USB adapter and the power splitter you linked above both seem to have female heads. 5. Any AliExpress examples of the 24-5V power injector, PSU and buck converter? 6. Here is a cheap power injector similar to your above link, talking not 24V: 100% Original 4 LAN Ports Passive Power Over Ethernet Module Injector DC 9-48V IP Camera Power supply PoE switch adapter PoE box http://www.aliexpress.com/item/32555424008/32555424008.html I searched for this "9-48V" PSU but no hits on AliExpress except here, which doesn't look right: AC/DC 9V-48V To 1.8-25V 3A Adjustable Step Down Power Supply Voltage Module Board For Terminals LED Resistor Potentiometer http://s.aliexpress.com/FBBJZN3u In any case, I would like to stick to the 24-5V power injector/ PSU / buck converter. 7. How would we use the OPi0 as PoE injector, passive or 802.3af, as the last sentence here says from Xunlong sunxi? http://linux-sunxi.org/Xunlong_Orange_Pi_Zero#Powering_the_board I do appreciate all your folks' help. Lots to learn here as OPi ( and others) keep churning new products! Merry Christmas !
  14. I read the wiki on PoE: https://en.m.wikipedia.org/wiki/Power_over_Ethernet Under the sub topic: Non Standard Implementations-Passive it talks about PoE injectors, but there is no mention of PoE switches. 1. Does this mean we cannot use PoE switches as PSE's with Passive PoE which looks cheaper for OPi0 as PD ( just a zero ohm resistor between pads) ? 2. For example, could we connect 4 OPi0 PDs ( say, acting as USB webcam modules) to a 4 port PoE switch via cat5 cable to stream video, then connect the WAN port to another device receiving these streams?
  15. dgp, I see. I thought that with 2.4 GHz WiFi chip, it is a matter of a software driver for Bluetooth. No special hw is necessary.
  16. dgp, Nice work. Now do you know if Bluetooth x.x can be supported?
  17. hmartin, Thanks. Do you know if Armbian running on OPi has any extra processing capabilities for CSI cams vs USBs? Any good link on passive PoE config? I want to know how to connect 4 cams, each with its module/ WiFi/ webserver to stream video/ audio, to a single "receiver" board via PoE. Presumably this requires a 4 port Ethernet hub/ switch with PoE injection?
  18. tkaiser, For a noob like me. What are the pros and cons of USB v CSI ribbon cams? I see USBs everywhere, and with OPi0 PoE and USB ports, they make a lot of sense?
  19. Oh, btw, I was emailing zhaofiyan some hours ago asking if OPi0 had a camera interface (no.) But then he said they are developing a "new version" with a camera interface undergoing testing now, perhaps ready in a month. Not sure if this is s new PiO version. But at least OPi0 512MB now comes with 2MB SPI flash; 256 MB version will too in the next batch. So their products keep coming...
  20. tkaiser, I am OK with CVBS mostly, and looking for lowest cost with WiFi, possibly onboard memory to save on extra SD card costs.
  21. tkaiser, Igor, Any outline of NAS features and price? Will we be able to record one TV channel/ video stream while "watching" another?
  22. A great 9.30 min review here, pointing out the issues: Cooling, GPIO expansion, no MIPI, lack of SPI support in Armbian? https://m.youtube.com/watch?v=MzxLYGWQddA Apparently the much discussed Armbian cooling/Vreg techniques were not known to the author. Other stuff is interesting, with comparison to RPi.
  23. Would there be support for BT on the WiFi driver? There is IR rx pin support. But a Bluetooth remote control costs about the same, and doesn't need line of sight.
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