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connecting up the capture settings

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This commit is contained in:
langolierz
2018-05-01 00:51:36 +00:00
parent a50836e39a
commit d4b381b408
3 changed files with 89 additions and 24 deletions
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3
actions.py
View File

@@ -183,6 +183,9 @@ class Actions(object):
def update_video_settings(self, setting_value):
self.video_driver.update_video_settings()
def update_capture_settings(self, setting_value):
self.capture.update_capture_settings()
def change_output_mode(self, setting_value):
if setting_value == 'hdmi':
subprocess.call(['tvservice', '-p'])

61
data_centre/json_objects/settings.json
View File

@@ -1,29 +1,52 @@
{
"capture": {
"DEVICE": {
"action": "enable_capture_device",
"options": [],
"action": "update_capture_settings",
"options": [
"enabled",
"disabled"
],
"value": "enabled"
},
"EFFECT": {
"action": null,
"options": [],
"value": ""
},
"EXPOSURE": {
"action": null,
"options": [],
"value": ""
},
"FRAMERATE": {
"action": null,
"action": "update_capture_settings",
"options": [
"24",
"23.976",
"25",
"29.97",
"30",
"50",
"59.94",
"60"
],
"value": "25"
},
"IMAGE_EFFECT": {
"action": "update_capture_settings",
"options": [],
"value": ""
"value": "none"
},
"RESOLUTION": {
"action": null,
"options": [],
"value": ""
"action": "update_capture_settings",
"options": [
"640x480",
"768x576",
"1280x720",
"1920x1080"
],
"value": "640x480"
},
"SHUTTER": {
"action": "update_capture_settings",
"options": [
"auto",
"1/1000",
"1/500",
"1/250",
"max"
],
"value": "auto"
}
},
"midi": {
@@ -50,7 +73,7 @@
"value": 1
},
"INPUT": {
"action": "cycle_setting_options",
"action": null,
"options": [
"enabled",
"disabled"
@@ -189,7 +212,7 @@
"value": "hdmi"
},
"SCREEN_MODE": {
"action": "cycle_setting_options",
"action": null,
"options": [
"stretch",
"letterbox",

49
video_centre/capture.py
View File

@@ -2,6 +2,7 @@ import os
import subprocess
import datetime
import picamera
import fractions
class Capture(object):
PREVIEW_LAYER = 255
@@ -10,27 +11,50 @@ class Capture(object):
self.root = root
self.message_handler = message_handler
self.data = data
self.use_capture = True
self.device = None
self.is_recording = False
self.is_previewing = False
self.video_dir = '/home/pi/Videos/'
self.update_capture_settings()
self.create_capture_device()
## some capture settings
def create_capture_device(self):
if self.use_capture:
self.update_capture_settings()
try:
self.device = picamera.PiCamera()
self.device = picamera.PiCamera(resolution=self.resolution, framerate=self.framerate)
except picamera.exc.PiCameraError as e:
self.use_capture = False
print('camera exception is {}'.format(e))
self.message_handler.set_message('INFO', 'no capture device attached')
def update_capture_settings(self):
##setting class variables
self.use_capture = self.data.settings['capture']['DEVICE']['value'] == 'enabled'
self.resolution = self.convert_resolution_value(self.data.settings['capture']['RESOLUTION']['value'])
print('the resolution is {}'.format(self.resolution))
self.framerate = self.convert_framerate_value(self.data.settings['capture']['FRAMERATE']['value'])
print('the framerate is {}'.format(self.framerate))
##update current instance (device) if in use
if self.device and not self.device.closed:
self.device.image_effect = self.data.settings['capture']['IMAGE_EFFECT']['value']
self.device.shutter_speed = self.convert_shutter_value(self.data.settings['capture']['SHUTTER']['value'])
print('the shutter speed is {}'.format(self.device.shutter_speed))
## can only update resolution and framerate if not recording
if not self.is_recording:
self.device.framerate = self.framerate
self.device.resolution = self.resolution
def start_preview(self):
if self.use_capture == False:
self.message_handler.set_message('INFO', 'capture not enabled')
return False
if self.device.closed:
if not self.device or self.device.closed:
self.create_capture_device()
self.is_previewing = True
self.device.start_preview()
@@ -88,6 +112,7 @@ class Capture(object):
self.is_recording = 'saving'
self.root.after(0, self.wait_for_recording_to_save, mp4box_process, recording_name)
self.update_capture_settings()
# return path to the video
if not self.device.preview:
self.device.close()
@@ -159,8 +184,22 @@ class Capture(object):
if self.device.preview is not None:
self.device.preview.alpha = amount
@staticmethod
def convert_resolution_value(setting_value):
split_values = setting_value.split('x')
return (int(split_values[0]), int(split_values[1]))
@staticmethod
def convert_framerate_value(setting_value):
return fractions.Fraction(setting_value).limit_denominator()
def convert_shutter_value(self, setting_value):
if setting_value == 'auto':
return 0
elif setting_value == 'max':
return int(1000000 / self.framerate)
else:
return int(fractions.Fraction(setting_value) * 1000000)