Editing tool that shifts the cut point between two clips without changing timeline duration — one clip gets longer as the other gets shorter.
Technical Details
In a roll edit, typically 1-30 frames are shifted simultaneously from both involved clips, with the maximum shift limited by the available handle material. Most digital editing systems allow roll edits with a precision of one frame (equivalent to approximately 41.67ms at 24fps). The edit functions exclusively between two directly adjacent clips on the same track. Modern NLE systems like Avid Media Composer or Adobe Premiere offer ripple and roll edit modes, with the roll edit visualized by special cursor icons (usually double arrows).
History & Development
The roll edit originates from the analog film editing era of the 1920s, where editors physically moved both film reels simultaneously to determine the precise cut point. In 1971, CMX Systems introduced the first digital roll edit functions with the CMX 600. Avid revolutionized non-linear editing in 1989 with the Media Composer and established roll edits as a standard feature. Since the 2000s, real-time codecs like DNxHD or ProRes have enabled smooth roll edit previews without rendering.
Practical Application in Film
Roll edits optimize dialogue sequences by refining the cut point between speaker changes without affecting the sync relationship with other tracks. In Christopher Nolan's "Dunkirk" (2017), editor Lee Smith used roll edits to precisely align the three timelines. In action sequences, roll edits allow for fine-tuning cuts to the exact impact frame without losing musical synchronization. The workflow saves time as no resynchronization of other tracks is required, but it reduces creative flexibility compared to separate ripple edits.
Comparison & Alternatives
Roll edits differ from ripple edits in that they keep the timeline length constant, while ripple edits add or remove material. Slip edits change the timing content of a clip without affecting its neighbors, and slide edits move a clip between two others. Modern AI-based editing tools like Adobe Sensei's Auto Reframe offer semi-automated roll edit suggestions based on audio waveform analysis. In collaborative workflows, cloud-based editing platforms like Frame.io replace traditional roll edits with comment-based edit adjustments with frame-accurate referencing.