Stack input videos horizontally.

This is the QSV variant of the hstack filter, each input stream may have different height, this filter will scale down/up each input stream while keeping the orignal aspect.

It accepts the following options:

inputs

See hstack.

shortest

See hstack.

height

Set height of output. If set to 0, this filter will set height of output to height of the first input stream. Default value is 0.