On 7/12/2025 11:59 PM, James Almer wrote:
On 7/12/2025 9:32 PM, Michael Niedermayer wrote:
On Fri, Jul 11, 2025 at 04:04:17PM +0000, Timo Rothenpieler wrote:
ffmpeg | branch: master | Timo Rothenpieler <t...@rothenpieler.org> | Tue Jun 24 19:30:19 2025 +0200| [90fa9636efff84ec5a4b06815722c08188dca551] | committer: Timo Rothenpieler

avformat/tls_schannel: add DTLS support

http://git.videolan.org/gitweb.cgi/ffmpeg.git/? a=commit;h=90fa9636efff84ec5a4b06815722c08188dca551
---

  configure                  |   6 +-
  libavformat/tls_schannel.c | 890 ++++++++++++++++++++++++++++++++++ +++++++----
  libavformat/version.h      |   2 +-
  3 files changed, 833 insertions(+), 65 deletions(-)

breaks on mingw64

src/libavformat/tls_schannel.c: In function ‘ff_dtls_export_materials’:
src/libavformat/tls_schannel.c:606:5: error: unknown type name ‘SecPkgContext_KeyingMaterialInfo’; did you mean ‘SecPkgContext_NegotiationInfo’?

This type (and probably everything below) is API introduced on Windows 10, so unless you build targeting _WIN32_WINNT >= 0x0A00, it will not be defined.
So i guess we should make the tls_schannel.c force that value, like so:

diff --git a/libavformat/tls_openssl.c b/libavformat/tls_openssl.c
index 2a01fb387d..a5cc8d3e27 100644
--- a/libavformat/tls_openssl.c
+++ b/libavformat/tls_openssl.c

Err, not here, but in tls_schannel.c

@@ -20,6 +20,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

+#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0A00
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0A00
+#endif
+
 #include "libavutil/mem.h"
 #include "network.h"
 #include "os_support.h"


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