Ensure the minimal Windows FFmpeg build includes HEVC header parsing

tools/chatgui/ffmpeg/build_ffmpeg.sh

@@ -243,7 +243,8 @@ CONFIGURE_ARGS=(
     --enable-libx264 --enable-libx265 --enable-libvpx --enable-libaom --enable-libvpl --enable-nvenc
     --enable-demuxer=avi --enable-demuxer=matroska --enable-demuxer=mov
     --enable-protocol=file --enable-parsers
-    --enable-bsf=h264_mp4toannexb --enable-bsf=hevc_mp4toannexb --enable-bsf=trace_headers
+    # hevc_metadata подключает HEVC CBS parser, необходимый также для trace_headers.
+    --enable-bsf=h264_mp4toannexb --enable-bsf=hevc_mp4toannexb --enable-bsf=trace_headers --enable-bsf=hevc_metadata
     --disable-programs --disable-doc --disable-avdevice
     --disable-avfilter --disable-postproc --disable-muxers
     --disable-ffprobe --disable-ffplay --disable-ffmpeg --disable-debug --enable-optimizations
@@ -278,6 +279,9 @@ fi
 
 "./configure" "${CONFIGURE_ARGS[@]}"
 
+grep -Eq '^#define CONFIG_CBS_H265 1$' config.h || die "FFmpeg configure did not enable the HEVC header parser"
+grep -Eq '^#define CONFIG_TRACE_HEADERS_BSF 1$' config_components.h || die "FFmpeg configure did not enable trace_headers"
+
 if [ "$PLATFORM" = "windows" ]; then
     for encoder in CONFIG_H264_AMF_ENCODER CONFIG_HEVC_AMF_ENCODER; do
         grep -Eq "^#define $encoder 1$" config_components.h \