[FFmpeg-devel] [PATCH] vfilters (germinal) docs

[Ví­ctor Paesa]

Hi,

On Sun, March 22, 2009 01:16, Stefano Sabatini wrote:
> On date Sunday 2009-03-22 00:18:15 +0100, V??ctor Paesa encoded:
> [...]
>> + at section scale
>> +
>> + at example
>> +./ffmpeg -i in.avi -vfilters "scale=200:100:sws_flags=bicubic" out.avi
>> + at end example
>
> scale=200:100:sws_flags\=bicubic
>
> The second '=' needs to be escaped, or the parser will interpret the
> '=' as a termination char, and will choke on:
> Unable to parse graph description substring: "=bicubic"

Escaped (in a second commit due to my slopiness ...)

> [...]
>> + at section movie
>> +
>> +The parameters of the movie filter are
>> + at example
>> + seekpoint in microseconds : string format : string filename
>> + at end example
>> +
>> +We can overlay a second movie on top of a main one
>> +
>> + at example
>> + input -----------> deltapts0 --> overlay --> output
>> +                                    ^
>> + movie --> scale--> deltapts1 ------|
>> + at end example
>> +
>> +To do that
>> +
>> + at example
>> +ffmpeg -i in.avi -s 240x320 -vfilters
>> "[in]setpts=PTS-STARTPTS,[T1]overlay=16:16[out];movie=3200000:avi:in.avi,scale=180:144,setpts=PTS-STARTPTS[T1]"
>> -y out.avi
>
> Please use spaces there, this command looks soooo scary...

He, he, added.

> Also could you explain briefly why the setpts filter is needed?

Sure, added explanation to the overlay filter.

> [...]
>
> And thanks for it!

Thanks both you and Vitor for your kind reviews.

Commited right away, as Vitor suggested in another mail.

Regards,
V?ctor