Input pads:
Permissions which are not accepted on incoming buffers. Any buffer
which has any of these permissions set will be automatically copied
by the filter system to a new buffer which does not have those
permissions. This can be used to easily disallow buffers with
AV_PERM_REUSE.
Output pads:
Permissions which are automatically removed on outgoing buffers. It
can be used to optimize buffer allocation.
Input pads: Permissions which are not accepted on incoming buffers. Any buffer which has any of these permissions set will be automatically copied by the filter system to a new buffer which does not have those permissions. This can be used to easily disallow buffers with AV_PERM_REUSE.
Output pads: Permissions which are automatically removed on outgoing buffers. It can be used to optimize buffer allocation.