Disable QoS events in live camera pipeline.
Camera timestamp jitter varies widely from one random webcam to another,
if too high upstream elements such basetransforms will start dropping
buffers. This has been observed with a common 1080p Logitech camera,
and is likely to happen with other cameras too.
Disabling QoS avoids the drops and renders every frame, even the "late"
ones. Coral camera worked fine and continues to do so.
Change-Id: I8ad41c6afeebb3a505cf4c70bf538a054c205ee2
diff --git a/edgetpuvision/pipelines.py b/edgetpuvision/pipelines.py
index b985c83..129a2fb 100644
--- a/edgetpuvision/pipelines.py
+++ b/edgetpuvision/pipelines.py
@@ -27,8 +27,8 @@
framerate='%d/%d' % fmt.framerate),
]
-def display_sink(sync=False):
- return Sink('glimage', sync=sync, name='glsink'),
+def display_sink(sync=False, qos=True):
+ return Sink('glimage', sync=sync, qos=qos, name='glsink'),
def h264_sink():
return Sink('app', name='h264sink', emit_signals=True, max_buffers=1, drop=False, sync=False)
@@ -106,7 +106,7 @@
def camera_display_pipeline(fmt, layout):
return (
[Filter('glvideomixer', name='mixer', background='black'),
- display_sink(sync=False)],
+ display_sink(sync=False, qos=False)],
[v4l2_src(fmt),
Filter('glupload'),
Tee(name='t')],
