[FFmpeg-user] Directly converting DNGs to MP4

Paul B Mahol onemda at gmail.com
Sun Nov 8 19:15:08 EET 2020

On Sun, Nov 8, 2020 at 6:12 PM ZEITFELD <martin.hoppe at zeit-feld.de> wrote:

> Hello nice girls ans guys!
> I have a highspeed camera that records raw data to DNG files. Now I try
> to have the fastest possible preview video of what is recorded. I
> succeeded using the GPU via FFMPEG, which is absolutely the fastest way
> I found until now.
> This is the command line I use:
> This gives me a MP4, but the colors are broken, the image is too dark
> and green and the quality is very bad, with a lot of banding and
> artifacts.
> Does anyone know how to make ffmpeg apply reasonably balanced settings
> when reading the DNGs?

Do not under any cost use swscale for this operation.
swscale does not support bunch of colorspaces.
Use zscale filter instead.

> Thanks a lot! Martin
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