Recording video in Raspberry Pi - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the basic command to start recording a video using the Raspberry Pi camera module?

The basic command is raspivid -o video.h264 -t 10000, which records a 10-second video and saves it as video.h264.

beginner

What does the -t option specify in the raspivid command?

The -t option sets the recording time in milliseconds. For example, -t 10000 records for 10 seconds.

intermediate

How can you record a video with a specific resolution using Raspberry Pi camera?

Use the -w and -h options with raspivid to set width and height. For example, raspivid -o video.h264 -t 5000 -w 1280 -h 720 records a 720p video.

beginner

What file format does raspivid save videos in by default?

raspivid saves videos in the raw H.264 format by default, which can be played or converted to other formats like MP4.

intermediate

How do you convert a raw H.264 video file to MP4 on Raspberry Pi?

You can use MP4Box with the command MP4Box -add video.h264 video.mp4 to convert the raw video to MP4 format.

Which command starts recording a 5-second video on Raspberry Pi?

A raspivid -o video.h264 -t 50000

B raspivid -o video.h264 -t 50

C raspivid -o video.h264

D raspivid -o video.h264 -t 5000

The -t 5000 option records for 5000 milliseconds, which is 5 seconds.

What does the -o option specify in the raspivid command?

A Recording time

B Video resolution

C Output file name

D Frame rate

The -o option sets the output file name for the recorded video.

Which format does raspivid save videos in by default?

A H.264

B AVI

C MOV

D MP4

raspivid saves videos in raw H.264 format by default.

How do you specify the video resolution to 1920x1080 in raspivid?

A -w 1920 -h 1080

B -r 1920 -c 1080

C -res 1920x1080

D -size 1920 1080

Use -w for width and -h for height to set resolution.

Which tool converts raw H.264 video to MP4 on Raspberry Pi?

A ffmpeg

B MP4Box

C raspivid

D vlc

MP4Box is commonly used to convert raw H.264 files to MP4 format.

Explain how to record a 10-second video at 1280x720 resolution using Raspberry Pi camera.

Think about the options needed to set file name, time, and resolution.

Describe the steps to convert a raw H.264 video file to MP4 format on Raspberry Pi.

Consider why raw H.264 might need conversion for easier playback.