at commit: 858db4b01fa2b55ee55056c033054ca54ac9b0fd

(documented the morning after, but believe this is correct)

Works:
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -c:a pcm_s24le -vcodec libx264 -crf 0 -preset superfast test.mov
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -c:a pcm_s32le -vcodec libx264 -crf 0 -preset superfast test.mkv
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -acodec flac -vcodec libx264 -crf 0 -preset superfast test.mkv

Doesn't work (issues with MOV)
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -acodec copy -vcodec libx264 -crf 0 -preset superfast test.mov
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -c:a pcm_s32le -vcodec libx264 -crf 0 -preset superfast test.mov

Haven't tested rgb10 (assuming is "soft" fails [600.0fps*] or complains like in previous builds):
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format rgb10 -i 'DeckLink Studio 4K' -c:a copy -vcodec libx264 -crf 0 -preset superfast test.mkv

(where ffmpeg10 = LD_PRELOAD=/usr/lib/x86_64-linux-gnu/x264-10bit/libx264.so.148 ffmpeg "$@")

*=soft fails as in older builds getting a reported 600.0fps when -c copy output.avi and analyze the avi file metadata

(side note)
Also works: (with v4l2loopback)
$ ffmpeg10 -format_code Hp59 -f decklink -video_input hdmi -audio_input embedded -audio_depth 32 -raw_format argb -i 'DeckLink Studio 4K' -c:a null -c:v rawvideo -pix_fmt yuv420p -threads 2 -f v4l2 /dev/videoX