Definition
What is transcoding in video?
Transcoding is the process of decoding a media file and encoding it again into a new representation, often to change its codec, resolution, frame rate, bitrate, or delivery compatibility. It is used for proxies, editing intermediates, platform uploads, and streaming versions.
A transcode can turn camera originals into edit-friendly files, create smaller review copies, or make a platform-compatible delivery. It differs from simply changing a filename or rewrapping streams into a new container: transcoding re-encodes at least one stream and therefore takes processing time.
Because many video codecs are lossy, repeated transcodes can reduce image quality. A robust workflow keeps a high-quality source or master, minimizes unnecessary generations, and chooses settings that match the actual purpose. If a stream already meets the technical requirements, it may be copied rather than re-encoded.
Example in the edit
A producer receives HEVC camera files that are difficult to edit on older systems. The assistant transcodes them to ProRes for post-production, then exports H.264 MP4 versions for web review and delivery.
Why editors use it
Transcoding bridges the gap between acquisition, editing, and playback requirements. Used carefully, it improves compatibility and speed; used carelessly, it wastes time, storage, and image quality.
Quick answers
Frequently asked questions about Transcoding
Is transcoding the same as converting a video?
In everyday use, yes. Technically, transcoding means decoding and re-encoding media into another representation.
Does transcoding always lower quality?
Lossy re-encoding can reduce quality, although a high-quality intermediate may show little visible loss. Avoid repeated unnecessary transcodes.
What is the difference between transcoding and rewrapping?
Transcoding creates newly encoded streams. Rewrapping moves existing streams into a different container without re-encoding them.