On Thu, 27 Apr 2017, Tung Tran wrote:
Dear All
I am running into an issue if ffmpeg cannout enable video input on decklink
card,
Here is the console output
[root@localhost ffmpeg]# ffmpeg -f decklink -i 'DeckLink SDI' -vf
scale=1280:720 -vcodec libx264 -pix_fmt yuv420p -tune zerolatency -preset
ultrafast -f mpegts udp://236.0.0.1:2000
You seem to be missing the -format_code option to select the input format.
Check the examples in the docs:
https://www.ffmpeg.org/ffmpeg-devices.html#Examples-1
[decklink @ 0x46fd3c0] Supported formats for 'DeckLink SDI':
format_code description
ntsc 720x486 at 30000/1001 fps (interlaced, lower field
first)
nt23 720x486 at 24000/1001 fps
pal 720x576 at 25000/1000 fps (interlaced, upper field
first)
23ps 1920x1080 at 24000/1001 fps
24ps 1920x1080 at 24000/1000 fps
Hp25 1920x1080 at 25000/1000 fps
Hp29 1920x1080 at 30000/1001 fps
Hp30 1920x1080 at 30000/1000 fps
Hi50 1920x1080 at 25000/1000 fps (interlaced, upper
field first)
Hi59 1920x1080 at 30000/1001 fps (interlaced, upper
field first)
Hi60 1920x1080 at 30000/1000 fps (interlaced, upper
field first)
hp50 1280x720 at 50000/1000 fps
hp59 1280x720 at 60000/1001 fps
hp60 1280x720 at 60000/1000 fps
DeckLink SDI: Immediate exit requested
Format codes are right there.
Regards,
Marton
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