Which format is commonly used for editing proxies during production?

Which format is commonly used for editing proxies during production?

• A. ProRes
• B. H.264
• C. JPEG 2000
• D. WAV

Answer: (A)

Proxies are small, editable stand-ins for the full-resolution footage used during the edit to keep things fast and smooth. The format chosen for proxies should decode quickly, be easy for editing software to handle, and preserve enough color and timing so editors can cut accurately and later relink to the full-res masters.

ProRes, especially the Proxy variant, is built for this workflow. It offers efficient, fast decoding and stable performance in most nonlinear editors, which means smoother scrubbing, effects, and timeline playback even on modest hardware. It also maintains good image quality and color information at a fraction of the size of the master files, and relinking to the high-resolution media later is straightforward in common editing programs.

H.264 is widely used for delivery and online viewing because of its high compression, but its long-GOP structure can be more demanding to decode during heavy editing, making it less ideal for offline proxies. JPEG 2000 is high quality and used in some cinema pipelines, but it tends to produce larger files and isn’t the standard choice for everyday offline proxies. WAV is an audio format, not video, so it isn’t used for proxy video files.