Avoids allocations and frees and error checks for said allocations;
also avoids a few indirections and casts.
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It is unused since 3575a495f6dcc395656343380e13c57d48b9f976
(and the error message is dangerous: av_get_pix_fmt_name(format)
returns NULL iff av_pix_fmt_desc_get(format) returns NULL
and using a NULL string for %s would be UB).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
