Coincidentally, I just picked up a book on FPGAs and then quickly=20 decided that it would take some time to learn. But I'm torn with this=20 path as past experience has told me to attack one technology at a time. Cheers, -Neil. On 3/11/2018 7:22 PM, Ryan O'Connor wrote: > If you're doing it for the goal of learning, maybe you could use an FPGA > development board instead and learn HDL :D then you could take in the > analogue or digital video signal and parallel process it into H.264 MPEG, > writing output to the SD Card all on one chip. The solution would easily > scale later if you needed to rebuild it to handle 4K video :D > > Ryan > > On 12 March 2018 at 12:12, Neil wrote: > >> I don't have WiFi available and I want to DIY this as I want to get my >> feet wet with video. >> >> Here's more info on what I'm trying to do... >> I have a few warehouses with some of my cars and other stuff, and after >> a couple break-ins, I want to make a device that I can mount on the wall >> outside to record video once it detects motion. >> I won't have access to power, so it will have to be battery powered. >> This is why I don't want an O.S, because the boot time would miss >> critical video as soon as it detects motion. I don't want to go with >> canned solution as I want to tie various sensors to it, and some >> specific interfaces. >> I don't need HD video as it seems 600-line video is decent for security >> systems. >> >> Cheers, >> -Neil. >> >> >> >> >> On 3/8/2018 3:27 PM, Jean-Paul Louis wrote: >>> Why not use a wifi IP canera? you can get one for less than $40. >>> http://hackaday.com/2018/03/05/customising-a-30-ip-camera-for-fun/ >>> >>> >>> >>> Just my $0.02, >>> >>> Jean-Paul >>> N1JPL >>> >>> >>> >>>> On Mar 7, 2018, at 11:31 PM, Neil wrote: >>>> >>>> I discovered that too. Seems that the TTL NTSC means NTSC analog outp= ut >>>> with TTL serial control. >>>> I'll need to figure out how fast that ADC would need to be. >>>> >>>> I now see JPEG camera modules... I need to figure out the protocol for >> that. >>>> Cheers, >>>> -Neil. >>>> >>>> >>>> >>>> On 3/7/2018 11:00 PM, Jean-Paul Louis wrote: >>>>> Neil, >>>>> That camera has only analog output, so you will need a fast ADC to >> record it. >>>>> >>>>> >>>>>> On Mar 7, 2018, at 9:22 PM, Neil wrote: >>>>>> >>>>>> I want to record video of at least 1.0MP to SSD (or other memory) fo= r >>>>>> about 3-5 minutes. 15FPS is fine. But I really want to avoid SBCs >>>>>> because of the OS (and more specifically the boot time), so wonderin= g >>>>>> what it would take to do this with a microcontroller. >>>>>> I'm looking at camera modules similar to this... >>>>>> https://www.aliexpress.com/item/600TVL-1-4-1-8mm-CMOS- >> FPV-170-Degree-Wide-Angle-Lens-Camera-PAL-NTSC-image/32570417705.html >>>>>> I believe (haven't yet found a clear answer) that these cameras do 2= 4 >>>>>> bpp (Is this correct?), and if so I'd need 1 MP x 3 bytes x 60 secs = x >> 5 >>>>>> mins =3D 900 MB to store raw data. >>>>>> That's no prob with an SD card, but I expect bandwidth will be an >> issue, >>>>>> so I'd need to compress it. This is where I draw a blank... what do= es >>>>>> it take to compress video? >>>>>> >>>>>> I'm clueless on video, so wondering if a microcontroller (say PIC32 = or >>>>>> ARM) would be able to accept TTL NTSC video at this rate and compres= s >>>>>> it, and then store it. Or is there a specialized processor I can us= e >> to >>>>>> accept the NTSC video stream and store it to SD? >>>>>> Should I use some other protocol other than NTSC for this perhaps? >>>>>> >>>>>> Cheers, >>>>>> -Neil. >>>>>> >>>>>> -- >>>>>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >>>>>> View/change your membership options at >>>>>> http://mailman.mit.edu/mailman/listinfo/piclist >>>>> Just my $0.02, >>>>> >>>>> Jean-Paul >>>>> N1JPL >>>>> >>>>> >>>>> >>>>> >>>> -- >>>> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >>>> View/change your membership options at >>>> http://mailman.mit.edu/mailman/listinfo/piclist >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .