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Old 18th April 2019, 23:26   #14  |  Link
sunshine
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Join Date: Apr 2019
Posts: 17
Quote:
Originally Posted by poisondeathray View Post
You can look at the clip props, but sometimes videos are flagged incorrectly and you will get the wrong results

In general SD is 601, HD is 709

Roughly , yes. I you might get 1-3 % space savings for 2-3x slower processing . You can do some mini tests, but it's really not worth it .


I mean bob deinterlacing (ie. double rate) with QTGMC . Not using "bob" algorithm to deinterlace
I'm taking your recommended approach (deinterlace the SD DV, then do my edits, color correction, etc. in resolve, then resize to 1080 height) but I've encountered a small problem.

The aspect ratio is incorrect, and the video looks off.

AVI input file to VapourSynth:
Code:
Width                                    : 720 pixels
Height                                   : 480 pixels
Pixel aspect ratio                       : 0.889
MOV output from ffmpeg:
Code:
Width                                    : 720 pixels
Height                                   : 480 pixels
Pixel aspect ratio                       : 1.000

To correct this, I've updated my ffmpeg command with "setsar=sar=8/9,setdar=dar=4/3" as follows.. Did I do this correctly?!

Code:
vspipe --y4m ./Deinterlace.py -a "INVID=$INVID" - | ffmpeg -nostdin -i pipe: -i "$INVID" -pix_fmt yuv422p -c:v libx264  -crf 0 -tune fastdecode -x264opts keyint=1 -c:a copy -map 0:0 -map 1:1 -vf setsar=sar=8/9,setdar=dar=4/3 "$OUTVID"
After this adjustment, the MOV output from ffmpeg:
Code:
Width                                    : 720 pixels
Height                                   : 480 pixels
Pixel aspect ratio                       : 0.889
Thanks!
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