All video decoders use the YCbCr colorspace. You'll need
to convert that to YIQ for NTSC.
You can create a YCbCr file with vlc.
vlc -I rc <file to decode> -V yuv --yuv-file=<output file> --yuv=chroma=UYVY
This will create a YCbCr file with 4:2:2 chroma in the format
Cb Y Cr Y Cb Y Cr Y .......
vlc does put a header and frame markers in the file. I don't know
if that can be disabled.
YCbCr files only contain the active video (720x480 for NTSC). You'll
have to create and insert the vertical and horizontal blanking.
Ron
On 7/16/2014 6:50 PM, Jordan Johnson wrote:
After finishing my AM Stereo transmitter, I have decided to build an
NTSC modulator. I think I have the actually modulation and filter
blocks down, I just need to firgure out how to get the right signals
from a digital video file. The file source wouldn't work; I would
probably have to use gstreamer. Anyone know exactly what I'm looking
for and how to get it? I need brightness, hue, saturation, and I
believe that is it.
Thanks.
- Jordan
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