Creates a new animation by loading it from an input stream.
The file format is detected automatically. If NULL is returned, then
error will be set. The cancellable can be used to abort the operation
from another thread. If the operation was cancelled, the error
G_IO_ERROR_CANCELLED will be returned. Other possible errors are in
the GDK_PIXBUF_ERROR and G_IO_ERROR domains.
The stream is not closed.
Since 2.28
Creates a new animation by loading it from an input stream. The file format is detected automatically. If NULL is returned, then error will be set. The cancellable can be used to abort the operation from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. Other possible errors are in the GDK_PIXBUF_ERROR and G_IO_ERROR domains. The stream is not closed. Since 2.28