Some filters support a generic "enable" expression option that can be used
to enable or disable a filter in the timeline. Filters supporting this
option have this flag set. When the enable expression is false, the default
no-op filter_frame() function is called in place of the filter_frame()
callback defined on each input pad, thus the frame is passed unchanged to
the next filters.
Some filters support a generic "enable" expression option that can be used to enable or disable a filter in the timeline. Filters supporting this option have this flag set. When the enable expression is false, the default no-op filter_frame() function is called in place of the filter_frame() callback defined on each input pad, thus the frame is passed unchanged to the next filters.