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Timecode Off by 1 Frame

Posted: Wed Aug 31, 2016 5:13 pm
by estenmar
Created a workflow that's using the timecode filter and a custom ffmpeg [-y -an -c:v prores_ks -profile:v 0 -vendor ap10 -pix_fmt %s_pixel_format% -s 569x320 -timecode %s_start_tc%]

Everything's working the way it's supposed to, however both the Timecode burnin and the -timecode %s_start_tc% are off by -1 frame.

(ie. source tc starts at 10;30;26;18, however first frame of transcode shows 10;30;26;17)

Re: Timecode Off by 1 Frame

Posted: Wed Aug 31, 2016 5:50 pm
by admin
Hi estenmar, thank you for using FFAStrans and welcome to the forum! :-)

I've tested a few files and I'm not able to recreate the problem. Could you send me a short sample file that initiates the issue?

-steinar

Re: Timecode Off by 1 Frame

Posted: Wed Aug 31, 2016 7:38 pm
by estenmar
Hey Steiner, here's a DL link. Includes original file, Transcode, and workflow export.

https://www.dropbox.com/s/qu0c12vyn3nal ... f.zip?dl=0

Thanks for taking a look!

Re: Timecode Off by 1 Frame

Posted: Fri Sep 02, 2016 9:05 pm
by admin
I have looked at the code for reading timecode and it turns out to be somewhat inaccurate when it comes to drop frame time code. But I think I have sorted it out now. Improvements will be in the 0.7.7 version. Thanks for reporting! :-)
-steinar