Video and audio editing：练习题

In audio editing, what is the primary purpose of normalising an audio clip?

An audio technician is working on a podcast and wants to ensure that frequencies above a certain threshold (like high-pitched hiss) are removed while allowing lower frequencies to remain. Which filter should be applied?

A professional video project requires the use of pan and zoom effects on a high-resolution still image inserted into a 1080p timeline. What is a critical technical consideration when resizing and cropping this still image?

A video editor needs to remove the first 5 seconds and the last 10 seconds of a raw footage clip. Which feature of video editing software is most appropriate for this task?

What is the primary difference between trimming and splicing in the context of video editing?

Identify two common video file formats that can be used when exporting a completed video editing project for use on the internet.

Describe how aspect ratio affects the visual presentation of a video when it is displayed on different hardware devices, such as a mobile phone compared to a widescreen television.

Compare the impact of lossy compression versus lossless compression on both the file size and the perceived quality of a high-fidelity audio track.

A filmmaker is editing a nature documentary. They have recorded several minutes of footage and need to refine the final output.

(a) Define trimming and splicing and explain how these techniques are used to create a coherent video sequence.
(b) The editor decides to use pan and zoom effects on a high-resolution still image within the video. Describe the visual effect this creates for the audience.

An audio engineer is preparing a podcast for distribution across various platforms with different bandwidth capabilities.

(a) Explain the purpose of normalising an audio clip and how it differs from simply increasing the volume.
(b) The engineer needs to apply equalisation using high pass and low pass filters. Describe the function of each filter and provide a scenario where noise reduction would be necessary before exporting.