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docs(linescan): add comment with available videoflip methods

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This commit is contained in:
yair
2025-12-21 22:49:55 +02:00
parent 29299d70bf
commit 741c162746
1 changed files with 21 additions and 23 deletions
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44
gst/linescan/launch_with_signal.py
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@@ -31,12 +31,12 @@
# - File output with automatic sequential numbering
# - IDS uEye camera source with intervalometer integration
# - Configurable camera settings (exposure, framerate, gain)
# - Horizontal linescan direction with 1900px output size, rotated 90° for vertical display
# - Camera rotated 90° clockwise, then vertical linescan with 1900px output size
# - 3-pixel bottom crop for sensor cleanup
# - Dual output via tee element (display + file save)
#
# Pipeline Architecture:
# idsueyesrc -> intervalometer -> videocrop -> queue -> linescan -> videoflip -> videoconvert -> autovideosink
# idsueyesrc -> intervalometer -> videocrop -> videoflip -> queue -> linescan -> videoconvert -> autovideosink
#
# Note: Files are saved via Python in the rollover signal callback, not through the pipeline
#
@@ -186,16 +186,12 @@ def on_rollover(linescan, buffer):
print(f"[ROL LOVER WARNING] Unsupported format {format_str}, saving as-is")
data = data.reshape((height, width, -1))
# Create PIL Image
# Create PIL Image and save
if channels == 1:
img = Image.fromarray(data, mode='L')
else:
img = Image.fromarray(data, mode='RGB')
# Rotate 90 degrees clockwise to display horizontally-scanned image vertically
img = img.transpose(Image.ROTATE_270)
# Save rotated image
if file_format == 'png':
img.save(filename, 'PNG')
else:
@@ -318,11 +314,11 @@ Examples:
source = Gst.ElementFactory.make("idsueyesrc", "source")
intervalometer = Gst.ElementFactory.make("intervalometer", "intervalometer")
videocrop = Gst.ElementFactory.make("videocrop", "crop")
videoflip = Gst.ElementFactory.make("videoflip", "flip")
queue1 = Gst.ElementFactory.make("queue", "queue1")
linescan = Gst.ElementFactory.make("linescan", "linescan")
# Display output with rotation
videoflip = Gst.ElementFactory.make("videoflip", "flip")
# Display output
videoconvert = Gst.ElementFactory.make("videoconvert", "convert")
videosink = Gst.ElementFactory.make("autovideosink", "videosink")
@@ -401,16 +397,18 @@ Examples:
# Configure videocrop
videocrop.set_property("bottom", 3)
# Configure linescan
linescan.set_property("direction", 0) # horizontal
linescan.set_property("output-size", 1900)
# Configure videoflip to rotate 90 degrees clockwise (method=1 is clockwise)
# Available methods: 0:none, 1:clockwise, 2:rotate-180, 3:counterclockwise,
# 4:horizontal-flip, 5:vertical-flip, 6:upper-left-diagonal, 7:upper-right-diagonal, 8:automatic
videoflip.set_property("method", 1)
videoflip.set_property("method", 1)
# Configure linescan
linescan.set_property("direction", 1) # vertical
linescan.set_property("output-size", 1900)
if args.debug:
print(f"Linescan: direction=horizontal, output-size=1900")
print(f"Display and files rotated 90° clockwise for vertical presentation")
print(f"Camera rotated 90° clockwise, then vertical linescan with output-size=1900")
# Connect rollover signal - files are saved in the callback
linescan.connect("rollover", on_rollover)
@@ -419,9 +417,9 @@ Examples:
pipeline.add(source)
pipeline.add(intervalometer)
pipeline.add(videocrop)
pipeline.add(videoflip)
pipeline.add(queue1)
pipeline.add(linescan)
pipeline.add(videoflip)
pipeline.add(videoconvert)
pipeline.add(videosink)
@@ -432,17 +430,17 @@ Examples:
if not intervalometer.link(videocrop):
print("ERROR: Could not link intervalometer to videocrop")
return -1
if not videocrop.link(queue1):
print("ERROR: Could not link videocrop to queue1")
if not videocrop.link(videoflip):
print("ERROR: Could not link videocrop to videoflip")
return -1
if not videoflip.link(queue1):
print("ERROR: Could not link videoflip to queue1")
return -1
if not queue1.link(linescan):
print("ERROR: Could not link queue1 to linescan")
return -1
if not linescan.link(videoflip):
print("ERROR: Could not link linescan to videoflip")
return -1
if not videoflip.link(videoconvert):
print("ERROR: Could not link videoflip to videoconvert")
if not linescan.link(videoconvert):
print("ERROR: Could not link linescan to videoconvert")
return -1
if not videoconvert.link(videosink):
print("ERROR: Could not link videoconvert to videosink")