FFAStrans forum

Dear steipal,

first of all: great work, I really like your GUI and product concept!

Now our current issue. Not a bug at all, but we do not know how to handle it...

We use a 720x576px input video source file with an aspect ratio of 16:9 (DAR).
That's common in a TV production environment (anomorphic widescreen).

The H.264/mp4 output of the ffastrans/ffmepg/avisynth process is, unfortumately, a 720x576px video file with an aspect ratio 5:4.
Due to the fact that ffmpeg preserves the Aspect ratio in the libx264 encoding process, I assume that avisynth recalculates the aspect ratio from the video width and height dimensions by assuming square pixels.

Is there a way to prevent this, and to get a 16:9 DAR output as expected?
I had the idea to select a "Custom AviSynth Script" filter, but I do not have an idea on how to write this script.

Thanks for every suggestion.

ALA

Hei ALA and thanks for using FFAStrans!

Unfortunately there is no way (to my knowledge) to set DAR in AviSynth. This is a matter for the encoder. I know about this shortcoming in the supplied encoders so I urge you to create a "Custom FFmpeg"-encoder preset to deal with it. The ffmpeg argument "-aspect 16:9" should get you through it. If you do not know how to build such a preset in FFAStrans i can help you with it.

In a future version, the "Variable" version, I will make several clip-properties available as variables to insert where you need it in FFAStrans. It's on the roadmap

-steipal

Your aspect ratio argument suggestion works like a charme.

Thanks!

ALA