[FFmpeg-user] Filter complex problem

[JULIAN GARDNER]

>________________________________
> From: Paul B Mahol <onemda at gmail.com>
>To: FFmpeg user questions <ffmpeg-user at ffmpeg.org> 
>Sent: Friday, 6 December 2013, 13:03
>Subject: Re: [FFmpeg-user] Filter complex problem
> 
>
>On 12/5/13, JULIAN GARDNER <joolzg at btinternet.com> wrote:
>> I have this filter
>>
>> -filter_complex '[0:#$dvbsPid] scale=1280:720 [sub],[0:v][sub] overlay'
>>
>> which is taking in a known 1280:720 video, resizing the dvb subtitles to
>> 1280:720 and overlaying the 2.
>>
>> PROBLEM
>> I dont want to have this 1280:720 fixed, what i would like is to be able to
>> use some form of [0:v]:iw:[0:v];ih, but this does not work
>
>How? What you tried?
>

[0:v]:iw:[0:v];ih
out_w:in_h
w:h


>>
>> So is there a way of getting the [0:v] inputs width and height to i can
>> change the filter to be a generic filter
>>
>> joolz
>>
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>>
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Unless there is a special one i cant dind in the online docs im stuck

Any help would be helpful

joolz