FFmpeg: fix AVDictionary debugHEADdev

The buffer returned by av_dict_get_string needs to be freed with
av_free, not std::free.
Caught by address sanitizer on windows.

Pick-to: 6.8 6.9 6.10
Change-Id: I2224fa3e2405a26aed1eedfb93d02f3b6ec9f531
Reviewed-by: Mikko Hallamaa <[email protected]>
Reviewed-by: Tim Blechmann <[email protected]>
Reviewed-by: Nils Petter Skålerud <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/multimedia/ffmpeg/qffmpeg.cpp b/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
index 11e8850a6..596af78cb 100644
--- a/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
+++ b/src/plugins/multimedia/ffmpeg/qffmpeg.cpp
@@ -346,7 +346,7 @@ QDebug operator<<(QDebug dbg, const AVDictionary &dict)
 {
     char *buffer = 0;
     auto freeBuffer = QScopeGuard([&] {
-        std::free(buffer);
+        av_free(buffer);
     });
 
     int status = av_dict_get_string(&dict, &buffer, '=', ',');