Not compatible with ffmpeg 5.0
The following happens:
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: ext/libav/libgstlibav.so.p/gstavaudenc.c.o: in function `gst_ffmpegaudenc_set_format':
| /usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavaudenc.c:246: undefined reference to `avcodec_get_context_defaults3'
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: /usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavaudenc.c:292: undefined reference to `avcodec_get_context_defaults3'
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: /usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavaudenc.c:336: undefined reference to `avcodec_get_context_defaults3'
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: /usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavaudenc.c:317: undefined reference to `avcodec_get_context_defaults3'
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: ext/libav/libgstlibav.so.p/gstavaudenc.c.o: in function `gst_ffmpegaudenc_start':
| /usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavaudenc.c:197: undefined reference to `avcodec_get_context_defaults3'
| /home/alex/development/poky/build-64-alt/tmp/work/core2-64-poky-linux/gstreamer1.0-libav/1.18.5-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/11.2.0/ld: ext/libav/libgstlibav.so.p/gstavvidenc.c.o:/usr/src/debug/gstreamer1.0-libav/1.18.5-r0/build/../gst-libav-1.18.5/ext/libav/gstavvidenc.c:252: more undefined references to `avcodec_get_context_defaults3' follow
| collect2: error: ld returned 1 exit status