@@ -50,19 +50,20 @@ DTS-HD.
Add extradata to the beginning of the filtered packets.
+@table @option
+@item freq
The additional argument specifies which packets should be filtered.
It accepts the values:
@table @samp
-@item a
-add extradata to all key packets, but only if @var{local_header} is
-set in the @option{flags2} codec context field
-
@item k
+@item keyframe
add extradata to all key packets
@item e
+@item all
add extradata to all packets
@end table
+@end table
If not specified it is assumed @samp{k}.