[FFmpeg-user] How to pan hozitonally on a video?

[Sub Phil]

Thanks, I didn't know about enable, I will try later

http://ffmpeg.org/ffmpeg-filters.html#Timeline-editing

2016-01-27 2:20 GMT+01:00 Ryan Williams <rwilliams at busivid.com>:

> According to http://ffmpeg.org/ffmpeg-filters.html#crop the expression
> variables for t (time in seconds) and n (frame number) are available.
>
> # X distance per frame = (400 - 0) / (10 * 25) = 1.6
> # Y distance per frame = (10 - 0) / (10 * 25) = 0.04
>
> I suspect you'll want something similar to the following.
>
> -vf "crop=enable=lt(t\,10):w=1200:h=980,
> crop=enable=between(t\,10\,20):w=1200:h=980:x='(t-10)*1.6':y='(t-10)*.04',
> crop=enable=gte(t\,20):w=1200:h=980:x=400:y=10"
>
> -----Original Message-----
> From: ffmpeg-user [mailto:ffmpeg-user-bounces at ffmpeg.org] On Behalf Of
> Paul B Mahol
> Sent: Wednesday, 27 January 2016 05:35
> To: FFmpeg user questions
> Subject: Re: [FFmpeg-user] How to pan hozitonally on a video?
>
> On 1/26/16, Sub Phil <phil4000n at gmail.com> wrote:
> > RE:https://www.ffmpeg.org/ffmpeg-filters.html#zoompan
> >
> > Hi,
> >
> > I have a 30 sec video in 1920x1080 at 25fps
> >
> > I want to pan/crop with a constant rectangle of 1200x980
> >
> > It rectangle starts at position (0,0) till t=10 sec than from t=10 sec
> > to t=20sec I wish my rectangle to move at a constant/linear speed from
> > position (0,0) to (400,10)
> >
> > Than from t=20 sec onwards, rectangle stays at (400,10).
> >
> > How can I do that??
>
> Using crop filter and some kind of expressions for x and y.
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