From the Rhino website:
In October 1974 — at the peak of their global fame — the Grateful Dead played five consecutive shows at San Francisco’s legendary Winterland. Those dates were recorded and filmed for the 1977 motion picture release The Grateful Dead Movie. This five-disc soundtrack presents all of the music from the movie, plus 32 bonus tracks, including 20 songs exclusive to this set.
Many historic jams that were edited down for the film are restored in their entirety, including the 60-minute blockbuster jam featuring "Sugar Magnolia," "He’s Gone," "Jam," "Caution Jam," "Drums," "Space," "Truckin’," "Black Peter," and "Sunshine Daydream." Also included is the now-complete 32-minute "Playing In The Band," cut to half that length on screen.