V2EX non-drop-frame

Non-Drop-Frame

释义 Definition

非丢帧(时间码):视频/音频后期中的一种时间码计数方式,时间码编号不跳号,按固定帧率逐帧递增(常见于把 29.97 fps 当作 30 来计数)。在 NTSC 等非整数帧率场景下,这会导致时间码与真实时钟时间逐渐产生偏差
(另有相关术语 drop-frame,与之相对。)

发音 Pronunciation (IPA)

/nn drp frem/
/nn drp frem/

例句 Examples

We recorded the show using non-drop-frame timecode.
我们用非丢帧时间码记录了这场节目。

If you edit 29.97 fps footage with non-drop-frame, your timecode can drift from real time over a long program.
如果你用非丢帧时间码来剪辑 29.97 帧率的素材,节目很长时,时间码可能会逐渐偏离真实时间。

词源 Etymology

non-(“非、不”)+ drop-frame(“丢帧时间码”)构成。这里的 drop-frame 并不是指视频真的丢了画面帧,而是指为让时间码更贴近真实时钟时间,在计数编号上“跳过”某些帧号;因此 non-drop-frame 就是“跳号”的时间码计数方式。

相关词 Related Words

文学/著作中的使用 Literary Works

  • The Filmmaker’s Handbook(《电影制作手册》)在时间码与后期流程章节讨论 drop-frame 与 non-drop-frame
  • Video Demystified(《视频揭秘/视频技术解析》)介绍 NTSC/帧率与时间码体系时涉及该术语
  • Adobe Premiere Pro Classroom in a Book(《Adobe Premiere Pro 经典教程》)在序列设置与时间码显示/导出相关内容中出现
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