Testing chunked

The encoded picture has a size of 62KiB and is divided into 12 blocks. There are 16 chunks in this video and any 12 of the chunks are enough to decode. This means you can skip 1/4 of the video and still recover the picture.

[@DarkStarPDX]

Looks delicious!

[@ExploringWithJason]

Would be awesome if you make rattlegram also capable of decoding ADS-B, Mode a,b and c and also AIS just by listening from a simple quansheng that's unlocked on the 1090mhz band, also a preinstalled low res map of the world to work completly offline would be awesome. Thanks for your amazing work 🙏

[@xdsopl]

My pleasure. AFAIK ADS-B needs a much larger bandwidth (2 MHz) than voice (3 kHz). So using a higher bandwidth receiver like a RTL-SDR for example is necessary. Playing with ADS-B is on my bucket list.

[@ExploringWithJason]

@xdsopl I really don't know how this works, however..the quansheng UV-K5(8) radio that costs only $15 can be unlocked to receive on a frequency between 15khz to 1300mhz, again..not sure how it works but couldn't the signals received for AIS and ADS-B be decoded somehow only through audio?

[@xdsopl]

​@@ExploringWithJason I don't know if it can provide the 25kHz bandwidth necessary to receive AIS but ADS-B is out of the question with a voice receiver. You really need a higher bandwidth receiver with these signals. Just being able to tune to the right carrier is not enough, you also need the bandwidth at that frequency. RTL-SDR dongles are really cheap and there are smartphone apps that decode these signals via an OTG cable.

[@ExploringWithJason]

@@xdsopl oh, I know, I have an rtl-sdr V4 and I have SDRAngel and dump1090 installed on my android phone, but facinated about what those little quansgeng's can do 😅

[@ArclampSDR]

ooooo

[@DeanLin]

Hi, is this a demo of a future feature? I tried decoding it with the existing 1.11 version, and it showed payload unknown. It would be great to send larger images.

[@xdsopl]

I've just released Assempix v1.13 as open beta and it might take some time until you can install it from the Play Store. Shredpix does not have this feature yet and you need to use the command line modem and the CRS tool to create chunked transmissions.