[FFmpeg-devel] [PATCH] vf_overlay: Add `timebase` option to set the time base source for the output video.

[Paul B Mahol]

On 1/20/16, Vittorio Gambaletta (VittGam) <ffmpeg-dev at vittgam.net> wrote:
> With this commit it is possible to use vf_overlay to center a video over
> a black background, without having to know the video framerate in advance
> and set it as parameter to lavfi.
>
> Signed-off-by: Vittorio Gambaletta <ffmpeg-dev at vittgam.net>
> ---
>  doc/filters.texi         |   14 ++++++++++++++
>  libavfilter/vf_overlay.c |   14 +++++++++-----
>  2 files changed, 23 insertions(+), 5 deletions(-)
>

Pardon me, could you give command example where this is useful but
currently does not work,
but does work with this patch applied?