Mark avui encoder experimental.

Some decoders require the AVID atom that we currently
do not write when encoding avui.

libavcodec/avuienc.c

@@ -107,6 +107,7 @@ AVCodec ff_avui_encoder = {
     .init         = avui_encode_init,
     .encode2      = avui_encode_frame,
     .close        = avui_encode_close,
+    .capabilities = CODEC_CAP_EXPERIMENTAL,
     .pix_fmts     = (const enum PixelFormat[]){ PIX_FMT_UYVY422, PIX_FMT_NONE },
     .long_name    = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
 };

tests/codec-regression.sh

@@ -351,7 +351,7 @@ do_video_decoding "" "-sws_flags neighbor+bitexact -pix_fmt yuv420p"
 fi
 
 if [ -n "$do_avui" ] ; then
-do_video_encoding avui.mov "-s pal -an -c:v avui -sws_flags neighbor+bitexact"
+do_video_encoding avui.mov "-s pal -an -c:v avui -strict experimental -sws_flags neighbor+bitexact"
 do_video_decoding "" "-s cif -sws_flags neighbor+bitexact -pix_fmt yuv420p"
 fi