python3 -m venv venv

source venv/bin/activate
pip install --upgrade wheel pip setuptools
pip install --upgrade --requirement requirements.txt

./build-3rd-party.sh
./build-gst-python.sh

pip install git+https://github.com/jackersson/gstreamer-python.git@{tag_name}#egg=gstreamer-python

### to skip ./build-gst-python.sh
pip install . -v --install-option "build_py" --install-option "--skip-gst-python"

### to set specific gstreamer version
export GST_VERSION=1.14.5

PYTHONPATH=. pytest tests/ -s --verbose

export LIB_GSTREAMER_PATH=libgstreamer-1.0.so.0

export GST_PYTHON_LOG_LEVEL=0, 1, 2, 3, 4, 5

from gstreamer import GstPipeline

command = "videotestsrc num-buffers=100 ! fakesink sync=false"
with GstPipeline(command) as pipeline:
    ...

from gstreamer import GstVideoSource

width, height, num_buffers = 1920, 1080, 100
caps_filter = 'capsfilter caps=video/x-raw,format=RGB,width={},height={}'.format(width, height)
command = 'videotestsrc num-buffers={} ! {} ! appsink emit-signals=True sync=false'.format(
num_buffers, caps_filter)
with GstVideoSource(command) as pipeline:
    buffers = []
    while len(buffers) < num_buffers:
        buffer = pipeline.pop()
        if buffer:
            buffers.append(buffer)
    print('Got: {} buffers'.format(len(buffers)))

from gstreamer import GstVideoSink

width, height = 1920, 1080
command = "appsrc emit-signals=True is-live=True ! videoconvert ! fakesink sync=false"
with GstVideoSink(command, width=width, height=height) as pipeline:
    for _ in range(10):
        pipeline.push(buffer=np.random.randint(low=0, high=255, size=(height, width, 3), dtype=np.uint8))

python examples/pipeline_with_factory.py

python examples/pipeline_with_parse_launch.py -p "videotestsrc num-buffers=100 pattern=1 ! autovideosink"

PYTHONPATH=. python examples/run_appsink.py -p "videotestsrc num-buffers=100 ! capsfilter caps=video/x-raw,format=RGB,width=640,height=480 ! appsink emit-signals=True"

PYTHONPATH=. python examples/run_appsrc.py -p "appsrc emit-signals=True is-live=True caps=video/x-raw,format=RGB,width=640,height=480 ! queue ! videoconvert ! autovideosink"  -n 1000