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Update recv_av.py #37

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50 changes: 35 additions & 15 deletions example/recv_av.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@ def main():
return 0

ndi_find = ndi.find_create_v2()

if ndi_find is None:
return 0

Expand All @@ -22,6 +21,9 @@ def main():
ndi.find_wait_for_sources(ndi_find, 1000)
sources = ndi.find_get_current_sources(ndi_find)

for s in sources:
print(f"Device Name:{s.ndi_name}")

recv_create_desc = ndi.RecvCreateV3()
recv_create_desc.color_format = ndi.RECV_COLOR_FORMAT_BGRX_BGRA

Expand All @@ -35,35 +37,53 @@ def main():
ndi.find_destroy(ndi_find)

fps = 30
output = av.open('output.mov', mode='w')
stream = output.add_stream('mpeg4', rate=fps)
stream.width = 1920
stream.height = 1080
stream.pix_fmt = 'yuv420p'
stream.bit_rate = 8e+6
stream.bit_rate_tolerance = 12e+6
stream.codec_context.time_base = Fraction(1, fps)
output = av.open('../output.mov', mode='w')

video_stream = output.add_stream('mpeg4', rate=fps)
video_stream.width = 1920
video_stream.height = 1080
video_stream.pix_fmt = 'yuv420p'
video_stream.bit_rate = 8e+6
video_stream.bit_rate_tolerance = 12e+6
video_stream.codec_context.time_base = Fraction(1, fps)

audio_stream = output.add_stream('aac', rate=48000)
audio_stream.channels = 2
audio_stream.format = 'fltp'
audio_stream.time_base = Fraction(1, 48000)

start = time.time()
while time.time() - start < 1.0 * 30:
t, v, _, _ = ndi.recv_capture_v2(ndi_recv, 5000)
t, v, a, _ = ndi.recv_capture_v2(ndi_recv, 5000)

if t == ndi.FRAME_TYPE_VIDEO:
print('Video data received (%dx%d).' % (v.xres, v.yres))
frame_time = time.time() - start
try:
frame = av.VideoFrame.from_ndarray(v.data, format='bgra')
frame.pts = int(
round(frame_time / stream.codec_context.time_base))
for packet in stream.encode(frame):
frame.pts = int(round(frame_time / video_stream.codec_context.time_base))
for packet in video_stream.encode(frame):
output.mux(packet)
except Exception as e:
print(e)
ndi.recv_free_video_v2(ndi_recv, v)

for packet in stream.encode():
output.mux(packet)
elif t == ndi.FRAME_TYPE_AUDIO:

av_audio_frame = av.AudioFrame.from_ndarray(a.data, format='fltp')
av_audio_frame.sample_rate = audio_stream.rate
av_audio_frame.time_base = Fraction(1, audio_stream.rate)
av_audio_frame.pts = int((time.time() - start) * audio_stream.rate)
for packet in audio_stream.encode(av_audio_frame):
output.mux(packet)


for packet in video_stream.encode():
output.mux(packet)

for packet in audio_stream.encode():
output.mux(packet)

output.close()

ndi.recv_destroy(ndi_recv)
Expand Down