How to set a specific ffmpeg Decklink device output format using format number? I am working on an IP-SDI decoder using ffmpeg and a Blackmagic Decklink Mini Monitor card.

If I list ffmpeg supported output modes with this command:

ffmpeg -i test_1.mp4 -f decklink -list_formats 1 'DeckLink Mini Monitor'


I get these:

[decklink @ 0x39b8c60] Supported formats for 'DeckLink Mini Monitor':
[decklink @ 0x39b8c60]  1       720x486 at 30000/1001 fps (interlaced, lower field first)
[decklink @ 0x39b8c60]  2       720x486 at 24000/1001 fps
[decklink @ 0x39b8c60]  3       720x576 at 25000/1000 fps (interlaced, upper field first)
[decklink @ 0x39b8c60]  4       720x486 at 60000/1001 fps
[decklink @ 0x39b8c60]  5       720x576 at 50000/1000 fps
[decklink @ 0x39b8c60]  6       1920x1080 at 24000/1001 fps
[decklink @ 0x39b8c60]  7       1920x1080 at 24000/1000 fps
[decklink @ 0x39b8c60]  8       1920x1080 at 25000/1000 fps
[decklink @ 0x39b8c60]  9       1920x1080 at 30000/1001 fps
[decklink @ 0x39b8c60]  10      1920x1080 at 30000/1000 fps
[decklink @ 0x39b8c60]  11      1920x1080 at 25000/1000 fps (interlaced, upper field first)
[decklink @ 0x39b8c60]  12      1920x1080 at 30000/1001 fps (interlaced, upper field first)
[decklink @ 0x39b8c60]  13      1920x1080 at 30000/1000 fps (interlaced, upper field first)
[decklink @ 0x39b8c60]  14      1280x720 at 50000/1000 fps
[decklink @ 0x39b8c60]  15      1280x720 at 60000/1001 fps
[decklink @ 0x39b8c60]  16      1280x720 at 60000/1000 fps


Ok. I can set my desired output format using -s for output size and -r for frame rate:

/home/ffmpeg/bin/ffmpeg \
-i udp://224.168.240.69:2069?buffer_size=262144?fifo_size=4525000&amp;overrun_nonfatal=1 \
-threads 0 -vf setpts=PTS-STARTPTS \
-pix_fmt uyvy422 \
-c:a pcm_s16le -ac 2 -ar 48000 \
-s 1920x1080 -r 30000/1000 \
-f decklink DeckLink Mini Monitor


Is there a way to set my desired output format using ffmpeg's Supported number from the list [1..16]?
I don't see any option in the source to set output format parameters via the serial number.