issue when capturing from decklink

Questions involving a Windows version of FFmpeg.
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Joined: Thu Apr 05, 2018 1:15 am

issue when capturing from decklink

Post by ahmad209 » Thu Apr 05, 2018 1:29 am

hello and welcome i have an issue when trying to capture from decklink using ffmpeg
the file is created and begin to capture with no errors but the main issue that it captures black signal although there is no issue when capturing by decklink software "media express" my command is

ffmpeg -f dshow -i video="Decklink Video Capture":audio="Decklink Audio Capture" -flags +cgop -sc_threshold 1000000000 -g 12 -bf 2 -flags2 +sgop -vcodec mpeg2video -b:v 2900K -maxrate 2900K -minrate 2900K -bufsize 1900k -crf 23 -acodec mp2 -ab 128K -async 1 -pix_fmt yuv420p -vf yadif=0:1 -s 720x576 -r 25 -aspect "4:3" "aa.m2t"

can any one tell me what is the problem is ?
Thanks in Advance

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Joined: Thu Jul 03, 2014 10:49 pm

Re: issue when capturing from decklink

Post by vayvanne » Thu Apr 19, 2018 4:56 pm

I would try like this:

Code: Select all

-video_pin_name "Capture" -audio_pin_name "Capture"

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Re: issue when capturing from decklink

Post by roderrooder » Fri Apr 20, 2018 8:04 am

Have you tried running a more standard command with less options just to see if you get any output at all?

What is the source resolution and fps?

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