| *ChanServ gives channel operator status to _polto_ | 06:13 | |
| <kaung> | hi room | 06:16 |
|---|---|---|
| <kaung> | anybody there? | 06:16 |
| <kaung> | elphel? | 06:17 |
| <kaung> | i would like to ask a question | 06:18 |
| <_polto_> | yes pls | 06:19 |
| <kaung> | oh thks | 06:19 |
| <kaung> | about theora | 06:19 |
| <kaung> | let me intro myself first .. | 06:19 |
| <kaung> | I am a student from singapore | 06:19 |
| <kaung> | www.nus.edu.sg | 06:19 |
| <kaung> | Now I am doing my Final Year Project on FPGA | 06:20 |
| <_polto_> | nice :) | 06:20 |
| <kaung> | Transmitting Video Stream Over IP | 06:20 |
| <kaung> | Thanks | 06:20 |
| <kaung> | At first, thought of using MPEG2 | 06:20 |
| <kaung> | but I can't find any FPGA MPEG2 enoder (open source) in the net | 06:21 |
| <kaung> | then I found this elphel | 06:21 |
| <kaung> | my question is | 06:21 |
| <kaung> | in order to use theora encoder | 06:22 |
| <kaung> | which files i need? | 06:22 |
| <_polto_> | uhhh | 06:22 |
| <_polto_> | difficult question :) | 06:23 |
| <kaung> | which version is most stable or easiest to port to Xilinx XUP board? | 06:23 |
| <kaung> | i found a number of version in sourceforge | 06:23 |
| <_polto_> | Theora in FPGA is not "independent", it need allot of software around. | 06:23 |
| <kaung> | and quite confuse | 06:23 |
| <kaung> | is it? | 06:23 |
| <kaung> | It mean .. i can't just take out the encoder module and port it to my design? | 06:24 |
| <_polto_> | our stable version we used on 333 camera model is : http://elphel.cvs.sourceforge.net/elphel/camera333/ | 06:25 |
| <_polto_> | A customer is porting this FPGA code from 333 to 353 and it already taking ~3-4 months. (not finished yet) | 06:26 |
| <kaung> | In which folder are VHDL files stored? | 06:27 |
| <kaung> | Opps | 06:27 |
| <_polto_> | porting it to another FPGA dev board with another CPU or without at all will probably take a year! | 06:27 |
| <kaung> | Ohh | 06:27 |
| <kaung> | Thanks for info though | 06:28 |
| <kaung> | u save my time | 06:28 |
| <kaung> | :) | 06:28 |
| <_polto_> | http://elphel.cvs.sourceforge.net/elphel/camera333/fpga/x333/ | 06:28 |
| <kaung> | i got it | 06:29 |
| <kaung> | It means I still need to work on MPEG2 encoder ... :( .. | 06:30 |
| <_polto_> | I do not think MPEG2 is much more simple | 06:30 |
| <_polto_> | you will have more chance if it was already adapted to this dev board and well defined so you do not loose time on drivers, ... | 06:31 |
| <kaung> | yea .. my board is Xilinx XUP (Virtex 2 Pro) | 06:31 |
| <kaung> | cheap board (they sell it at 299 USD) | 06:32 |
| <_polto_> | What is the goal of your Final Year FPGA project ? | 06:32 |
| <kaung> | Transmitting Video Stream Over IP | 06:32 |
| <kaung> | Do u think I can transmit RAW video file? | 06:33 |
| <kaung> | without using any compression | 06:33 |
| <_polto_> | sure | 06:33 |
| <_polto_> | ~1 FPS :) | 06:33 |
| <kaung> | :) yea wil be so slow | 06:34 |
| <_polto_> | with 100 MBps network | 06:34 |
| <kaung> | so .. no choie .. need to compress | 06:34 |
| <kaung> | I can't find any open source MPEG2 encoder | 06:34 |
| <kaung> | I mean in hardware | 06:35 |
| <_polto_> | I do not know any. | 06:35 |
| <kaung> | software, there is | 06:35 |
| <kaung> | but way too slow as well | 06:35 |
| <_polto_> | Ok, but do you need to implement a codec for your work or it can be anything related to video and FPGA ? | 06:35 |
| <kaung> | then i found elphel, and i tought can use it .. :) | 06:35 |
| <_polto_> | we have allot of work what can be done. | 06:35 |
| <kaung> | hummm yea video and FPGA ... but i need to transmit it | 06:36 |
| <kaung> | Title itself is " Transmitting Video Stream Over IP" | 06:37 |
| <kaung> | :D sucks | 06:37 |
| <kaung> | anyway, Do u have any other idea? for video anf FPGA? | 06:37 |
| <kaung> | *and | 06:37 |
| <kaung> | I am using Xilinx XUP board | 06:38 |
| <_polto_> | yes, you can do for example some enhancement of Theora or JPEG encoder for example. | 06:39 |
| <_polto_> | Then your project start ? | 06:40 |
| <kaung> | yes now starting | 06:40 |
| <_polto_> | :) | 06:40 |
| <_polto_> | ok | 06:40 |
| <_polto_> | pls leave me your e-mail, I'll write you. | 06:40 |
| <kaung> | but i'm interested to do it | 06:40 |
| <kaung> | kaungmyataung@gmail.com | 06:40 |
| <_polto_> | I think where are several things that can be done. | 06:41 |
| <kaung> | because I will do my Master Degree in next sem | 06:41 |
| <_polto_> | thanks | 06:41 |
| <kaung> | So, I still need to do one more Project for My Master Degree | 06:41 |
| <kaung> | Hopefully i can choose project title wisely this time | 06:42 |
| <kaung> | :D | 06:42 |
| <kaung> | now, I am in trouble due to project title | 06:42 |
| <kaung> | anyway, thanks a lot for taking time and answering my questions | 06:43 |
| <_polto_> | no problem. I'll mail you. | 06:43 |
| <kaung> | thanks | 06:44 |
| <kaung> | by the way, what time is at your place now? | 06:46 |
| <kaung> | here is 9 pm | 06:46 |
| <_polto_> | 7 AM | 06:46 |
| <kaung> | Opps | 06:47 |
| <_polto_> | :) | 06:47 |
| <kaung> | so early | 06:47 |
| <kaung> | sorry | 06:47 |
| <kaung> | I gotta off .. thanks a lot for ur help ... | 06:48 |
| <DanHeidel> | Hello, anyone about? | 08:52 |
| *ChanServ gives channel operator status to _polto_ | 10:44 | |
| <andrey> | DanHeidel: I do not have audio on the computer and don't look into IRC window too often. You may email us to invite here. | 11:12 |
| <_polto_> | DanHeidel ... | 18:17 |
| <DanHeidel> | Hello, sorry, Ihave a phone call, will be on IRC in 5 minutes | 18:32 |
| <_polto_> | np | 18:37 |
| <DanHeidel> | OK, sorry about that, important phone call. | 18:53 |
| <_polto_> | np | 18:53 |
| <DanHeidel> | OK, tomorrow, we're having the weekly meeting and we want to try the 10386 card to see how bad the damage is from the PS failure. I've already removed the defective PS and cleaned off all of the carbon soot from the boards. | 18:54 |
| <DanHeidel> | We wanted to know what sort of 3.3V power supply requirements are needed for direct supply into the 10386 | 18:55 |
| <DanHeidel> | Incidentally, the CF card is still operational which is promising - the PS may have failed without any large voltage excursions. | 18:56 |
| <_polto_> | what is 10386 ? | 18:59 |
| <_polto_> | you mean 10353 ? | 18:59 |
| <_polto_> | We really discourage you to supply 3.3v to the 10353 board. You can kill the CPU or the FPGA like that. | 19:00 |
| <DanHeidel> | sorry 10353 | 19:00 |
| <_polto_> | The best thing to do is to replace the DC/DC | 19:00 |
| <_polto_> | we will soon receive a 12v DC/DC | 19:00 |
| <_polto_> | we can send one to you | 19:00 |
| <_polto_> | or you send us the board to be repaired. | 19:01 |
| <DanHeidel> | We are certainly open to that idea but the traces going from the bridge rectifier to the DC/DC are completely burned away. If the same DC/DC is used, it would have to be wired into alternate locations on the board. I'm also concerned about that particular DC/DC converter as it seems to have a very poor low-voltage failure mode | 19:03 |
| <DanHeidel> | It is quite likely that a low voltage condition will be encountered in another balloon flight and so we are very hesitant to use that particular converter again. | 19:04 |
| <_polto_> | we switched to a TRACO DC/DC 9-36v | 19:05 |
| <DanHeidel> | Ah, was the switch because of the low-voltage failure or other reasons as well? | 19:06 |
| <_polto_> | just they are more nice, 12 and 24 volts in one... | 19:07 |
| <_polto_> | We do not know anything about power supply , it is difficult for us to chose something better for your requirements . | 19:07 |
| <_polto_> | Ok, I discussed with Andrey. It's better if you send us both 10353 and 10369. | 19:09 |
| <_polto_> | We will take care of reparation. | 19:09 |
| <_polto_> | it's better. | 19:09 |
| <DanHeidel> | If that's more covenient for you, we can certainly do that. | 19:11 |
| <DanHeidel> | It will probably be at least 2 months until the next launch so there is a fair amount of time for turnaround. | 19:12 |
| <DanHeidel> | We do have some good 3.3V DC/DC converters we can use as well as a fairly good testing setup to confirm board function here but if you feel safer doing it yourself, we can package the camera back up and send it back. | 19:15 |
| <_polto_> | We fill safer doing it here. :) | 19:16 |
| <DanHeidel> | No problem. I assume the safest way to ship it back would be to reassemble the camera and use the original shipping box, correct? | 19:16 |
| <_polto_> | yep | 19:17 |
| <DanHeidel> | OK, we'll repack it tomorrow and send it early next week, probably Tuesday. | 19:18 |
| <DanHeidel> | Also, do you have the model number for that DC/DC converter? We might want to get one of them to test it in similar conditions to ensure that we don't have the same problem or other problems in under-voltage conditions. | 19:20 |
| <DanHeidel> | We may also put in a voltage monitor to shut the entire power subsystem down in case of low voltage conditions. Undervoltage will be difficult to avoid, especially if there is any delay in the package recovery. | 19:21 |
| <_polto_> | TRACO THD 12-2410WI | 19:24 |
| <DanHeidel> | Ah, thanks | 19:25 |
| <DanHeidel> | I see the TRACO has an undervoltag lockout at 8V, that's good | 19:27 |
| <DanHeidel> | I do notice that the 12-2410 lists 18-36V as the input voltage, is that the correct model number? | 19:29 |
| <DanHeidel> | The 12-1210 seems like it would be the appropriate converter | 19:30 |
| <_polto_> | oups | 19:31 |
| <_polto_> | 1210 | 19:31 |
| <_polto_> | yes | 19:31 |
| <DanHeidel> | Do you recall which supplier you got the converter from? I am having trouble finding it on Octopart | 19:37 |
| <_polto_> | psui.com | 19:38 |
| <_polto_> | tracopower.com | 19:38 |
| <DanHeidel> | Ah, perfect, I found it at psui | 19:39 |
| <DanHeidel> | And it's the 12-1210WI 9-36V input version, correct? | 19:43 |
| <DanHeidel> | Ah, I see that the WI model is the 12-2410 after all, 9-36V input | 19:49 |
| <_polto_> | no, we need 12-1210WE | 19:54 |
| <_polto_> | ok, I have to go | 19:54 |
| <_polto_> | sorry | 19:54 |
| <_polto_> | see you later | 19:54 |
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