Dumpster is an application for viewing the contents of a movie description. The movie description is described in Appendix A of the QuickTime Developer Documentation.
When you open a movie file, you see all the nested atoms of the movie description. At the very top is the 'moov' atom.
When you clik on an atom name, the atom is expanded or reduced. When an atom only contains other atoms, it shows the nested atoms when it is expanded. For other types of atoms (leaf atoms), you can view the information contained within the atom.
If a leaf atom is unknown to Dumpster, a hex array is displayed.
You can print your current view of the movie description.
Display updates can get slow when the movie is really long and a long array is displayed.
You can modify the contents of the fields within a leaf atom, but never change the size of an atom. THIS IS A DANGEROUS OPERATION. Always have a backup of the movie. To alter a field, click on the field, type in the new data, and click on another field to accept the change.
If the field is numeric, you may enter hex values by entering a leading '$'.
The editing features of this program are very buggy. For example, you can't cut & paste fields. When you use a command key, the keypress is also entered into the field. You can only edit the first element of an array of items.