[FFmpeg-user] Drop frames during framemd5 calculation of DPX files

[Carl Eugen Hoyos]

Am Mi., 1. Apr. 2020 um 04:40 Uhr schrieb Ted Park <kumowoon1025 at gmail.com>:

> >> can you explain what causes misdetected
> >> frame rates?
> >
> > The dpx files store a frame rate that is ignored by the demuxer
> > (and therefore unused for the default output frame rate) but used
> > to calculate timestamps on decoding, leading to frame drops.
>
> I did not know that, why would it ignore the frame rate?

The image2 demuxer (that is used for dpx files) has never
heard of images with a framerate and therefore doesn't
try to read it.
Afaict, the dpx decoder uses the framerates.

> Isn’t the framerate the film source original if it’s there?

I don't know for sure but if you are talking about scans,
this simply doesn't matter.

Carl Eugen