DATV TX Tutorial

First you need to download GNU Radio Companion

And you need to download my (Mukhash's) GNU set and SimTX preset (recommended)

2. The preset has already set the I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended. This is the command used to convert the video into the TS that wont crash SDRangel (RX Tutorial)

ffmpeg -i File_name.mp4 -c:v libx264 -b:v 85k -maxrate:v 85k -bufsize:v 30k -preset slow -profile:v baseline -level 3.0 -vf "scale=320:240,fps=12,format=yuv420p" -c:a aac -b:a 24k -ac 1 -f mpegts -muxrate 140k -mpegts_pmt_start_pid 0x1000 -mpegts_start_pid 0x0100 -pcr_period 20 -pat_period 0.1 File_name.ts

And the load the .ts into the GNU Radio Companion "File Sink"

Start SimTX first and then GNU Radio, and then enjoy!