[Libav-user] [resize video] Lost duration
Hung.Nguyen at ambientdigitalgroup.com
Tue Oct 14 03:59:13 CEST 2014
Yes, I also scale the input using scale filter.
The filter I use is as following:
filter_spec = "scale=iw*min(640/iw\\,360/ih):ih*min(640/iw\\,360/ih), pad=640:360:(640-iw*min(640/iw\\,360/ih))/2:(360-ih*min(640/iw\\,360/ih))/2”;
I still don’t understand why scale video cause duration metadata lost.
On Oct 13, 2014, at 11:59 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:
> Hung Nguyen <Hung.Nguyen at ...> writes:
>> The problem I am facing now is, every time I try to
>> change video size when initialise encoder, the
>> output video does not have video duration:
>> enc_ctx->height = 360;
>> enc_ctx->width = 640;
> Did you just set the dimensions in the codec context
> or did you also use the scale your input (with the
> scale filter)?
> Carl Eugen
> Libav-user mailing list
> Libav-user at ffmpeg.org
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