No, I had not.  This is really what I needed first... and still need. =20
Awesome!

Thanks,
-Neil.


On 3/8/2018 7:01 PM, Bob Blick wrote:
> Hi Neil,
>
> Have you seen this document?
>
> http://www.st.com/content/ccc/resource/technical/document/application_not=
e/group0/c0/ef/15/38/d1/d6/49/88/DM00373474/files/DM00373474.pdf/jcr:conten=
t/translations/en.DM00373474.pdf
>
> It covers a lot of the details of cameras with digital interfaces.
>
> There are a couple of STM32 Discovery boards that already have the camera=
 connector, so there's demo code for them too.
>
> Friendly regards,
>
> Bob
>
> ________________________________________
> From: piclist-bounces@mit.edu <piclist-bounces@mit.edu> on behalf of Neil
> Sent: Wednesday, March 7, 2018 6:22 PM
> To: Microcontroller discussion list - Public.; Microcontroller discussion=
 list - Public.
> Subject: [EE] What does it take to record video to SD?
>
> I want to record video of at least 1.0MP to SSD (or other memory) for
> 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 wondering
> 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 24
> 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 does
> 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 compress
> it, and then store it.  Or is there a specialized processor I can use 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.
>

--=20
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