[CAPTURE] Intensity Pro + FFMPEG

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forart.it

  • Posts: 8
  • Joined: Mon Jan 02, 2023 9:46 am
  • Real Name: Marco Ravich

[CAPTURE] Intensity Pro + FFMPEG

PostTue Feb 28, 2023 7:20 am

Hi everyone,
since Media Express don't let users to set any parameter, we're going to exploit FFMPEG powerfulness that works quite straight forward and allows to apply some processing (eg. deinterlace) on the fly.

We're atying to "put together" an FFMPEG command line that will squeeze out the maximum possible quality from our capture rig.

At the moment we've started tests with this (ffplay):
Code: Select all
ffplay -rtbufsize 2048M -pixel_format uyvy422 -framerate 25 -f dshow -i video="Decklink Video Capture":audio="Decklink Audio Capture" -aspect 4:3 -vf "yadif=1"


It seems to work, but it's clearly far from optimum result:
Image

We've read something about Blackmagic-specific FFMPEG parameters but are still unclear, so we do need the expertise of users who's already faced these challenges.

Thanks in advance to anyone that can/will help.
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forart.it

  • Posts: 8
  • Joined: Mon Jan 02, 2023 9:46 am
  • Real Name: Marco Ravich

Re: [CAPTURE] Intensity Pro + FFMPEG

PostWed Mar 01, 2023 10:29 am

OK, we updated the commandline:
Code: Select all
ffplay -rtbufsize 1G -pixel_format uyvy422 -framerate 25 -f dshow -i video="Decklink Video Capture":audio="Decklink Audio Capture" -aspect 4:3 -vf "scale=in_range=full:out_range=full,lut='y=(va l-16)*1.067',bwdif=mode=send_field:parity=auto:deint=all"


Result:
Image

Now investigating sws_flags parameters...

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