muxable/av-processing

Generating an avi stream:

ffmpeg -f lavfi -i testsrc=d=10:s=640x480:r=24,format=rgb24 -f lavfi -i sine=f=440:b=4 -shortest -f avi -vcodec rawvideo -pix_fmt rgb24 output.avi

FFmpeg may report this warning, which is safe to ignore:

[avi @ 0x5589b8e7f580] rgb24 rawvideo cannot be written to avi, output file will be unreadable

Playing that output:

ffplay output.avi

Piping to app:

cat output.avi | python3 src/main.py

Prove the pipe works without app:

ffmpeg -f lavfi -i testsrc=d=10:s=640x480:r=24,format=rgb24 -f lavfi -i sine=f=440:b=4 -shortest -f avi -vcodec rawvideo -pix_fmt rgb24 - \
    | ffplay -

Piping ffmpeg through app to ffplay:

ffmpeg -f lavfi -i testsrc=d=10:s=640x480:r=24,format=rgb24 -f lavfi -i sine=f=440:b=4 -shortest -f avi -vcodec rawvideo -pix_fmt rgb24 - \
    | python3 src/main.py \
    | ffplay -

Productionizing, we can use bgr24 which is supported natively by avi

ffmpeg -hide_banner -f lavfi -i testsrc -f lavfi -i sine=b=4 -f avi -vcodec rawvideo -pix_fmt bgr24 - \
    | python3 src/main.py \
    | ffplay -

Running in a Docker container

ffmpeg -hide_banner -f lavfi -i testsrc -f lavfi -i sine=b=4 -f avi -vcodec rawvideo -pix_fmt bgr24 - \
    | docker run --rm -i $(docker build -q .) \
    | ffplay -