[FFmpeg-user] concat filter

Leo Butler leo.butler81 at googlemail.com
Sat Jul 9 18:07:00 EEST 2022

On Tue, Jul 05 2022, Carl Zwanzig <cpz at tuunq.com> wrote:

> On 7/4/2022 8:04 AM, Leo Butler via ffmpeg-user wrote:
>> Question: Is there a better way to sidestep the problem of changing
>> width or height? e.g. does ffmpeg already have a way to handle width or
>> height changes?
> How much of a change is there? Are we talking about varying by a few
> pixels or something like 720 to 1080?

The size changes are a few pixels (720 to 704 or vice versa).

> For dealing with minor size changes, an option is a filter chain to
> crop larger frames to the target size then center/overlay the result
> on a target-sized black background.

Thanks for the suggestion. That reminds me that one broadcaster started
doing this a few years ago to broadcast old recordings (from the 70s) to


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