Recording video in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start recording video using the PiCamera.

Raspberry Pi

from picamera import PiCamera
camera = PiCamera()
camera.[1]('video.h264')

Drag options to blanks, or click blank then click option'

Acapture

Bstop_recording

Cstart_recording

Dpreview

Attempts:

3 left

💡 Hint

Common Mistakes

Using stop_recording instead of start_recording.

Using capture which is for photos, not video.

The start_recording method begins recording video to the specified file.

2fill in blank

medium

Complete the code to stop recording video.

Raspberry Pi

from picamera import PiCamera
camera = PiCamera()
camera.start_recording('video.h264')
# After some time
camera.[1]()

Drag options to blanks, or click blank then click option'

Astop_recording

Bstart_recording

Ccapture

Dwait_recording

Attempts:

3 left

💡 Hint

Common Mistakes

Using start_recording again instead of stop_recording.

Using capture which is for photos.

The stop_recording method stops the video recording.

3fill in blank

hard

Fix the error in the code to record a 5-second video.

Raspberry Pi

from picamera import PiCamera
import time
camera = PiCamera()
camera.start_recording('video.h264')
time.[1](5)
camera.stop_recording()

Drag options to blanks, or click blank then click option'

Adelay

Bsleep

Cpause

Dwait

Attempts:

3 left

💡 Hint

Common Mistakes

Using time.wait or time.pause which do not exist.

Not pausing the program, so recording stops immediately.

The time.sleep(5) pauses the program for 5 seconds while recording.

4fill in blank

hard

Fill both blanks to record a video with resolution 640x480 and framerate 24.

Raspberry Pi

from picamera import PiCamera
camera = PiCamera()
camera.[1] = (640, 480)
camera.[2] = 24
camera.start_recording('video.h264')

Drag options to blanks, or click blank then click option'

Aresolution

Bframerate

Cbrightness

Dcontrast

Attempts:

3 left

💡 Hint

Common Mistakes

Using brightness or contrast instead of resolution or framerate.

Setting properties after starting recording.

Set resolution to (640, 480) and framerate to 24 before recording.

5fill in blank

hard

Fill all three blanks to record a video file named 'myvideo.h264' with resolution 1280x720 and framerate 30.

Raspberry Pi

from picamera import PiCamera
camera = PiCamera()
camera.[1] = (1280, 720)
camera.[2] = 30
camera.start_recording('[3]')

Drag options to blanks, or click blank then click option'

Aresolution

Bframerate

Cmyvideo.h264

Dvideo.h264

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong property names.

Using wrong filename string.

Setting properties after starting recording.

Set resolution and framerate properties, then start recording to 'myvideo.h264'.