wrong framerate interpretation

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bartcuijpers
Posts: 12
Joined: Wed Jun 14, 2017 4:35 pm

wrong framerate interpretation

Post by bartcuijpers »

While working around another issue (viewtopic.php?f=4&t=780), I noticed that QT files with the DNXHD codec (exported from AE) with a framerate of 50p are interpreted as 25p resulting in a encoded file playing in half speed.

A source file to test with:
https://drive.google.com/open?id=11DptO ... eS2fBFfDM1

Thanks!
admin
Site Admin
Posts: 1668
Joined: Sat Feb 08, 2014 10:39 pm

Re: wrong framerate interpretation

Post by admin »

An example to follow: Submit samples right away :-) Great! I will take a look.

-steinar
admin
Site Admin
Posts: 1668
Joined: Sat Feb 08, 2014 10:39 pm

Re: wrong framerate interpretation

Post by admin »

Hi bartcuijpers,

I think you need to submit your workflow. In my tests FFAStrans seem to find the correct fps of 50.

-steinar
bartcuijpers
Posts: 12
Joined: Wed Jun 14, 2017 4:35 pm

Re: wrong framerate interpretation

Post by bartcuijpers »

After some re-testing the problem seems to be different than I thought at first...
The output file isn't playing in half speed, but the duration metadata is incorrect; showing double the duration.
When playing the file in VLC it stops at 6 seconds.

I made a package including the workflow, input- and output files;
https://drive.google.com/open?id=1mUvoz ... r4ISOL-q6v

Thanks for responding!!
admin
Site Admin
Posts: 1668
Joined: Sat Feb 08, 2014 10:39 pm

Re: wrong framerate interpretation

Post by admin »

I have found the problem and it is indeed a bug. Thanks for reporting. Expect a fix in the next version. In the mean time, I suggest you skip the "A/V Media" decoder. It's not needed in your workflow and it's the one that introduce the issue.

-steinar
bartcuijpers
Posts: 12
Joined: Wed Jun 14, 2017 4:35 pm

Re: wrong framerate interpretation

Post by bartcuijpers »

Thanks Steinar!

For my information... when is the AV decoder mandatory?

Bart
admin
Site Admin
Posts: 1668
Joined: Sat Feb 08, 2014 10:39 pm

Re: wrong framerate interpretation

Post by admin »

If you want to apply filters. The "A/V Media" actually creates an AviSynth script and all the filters are avisynth based.

-steinar
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