[FFmpeg-user] Algorithm/Source Code for Changing the Resolution & Frame Rate using FFMpeg.

[N. Syazrina M.A.S]

Hi Stefano, 

Thank you for the reply. I'm clear about the temporal scaling. Could you briefly explain the algorithm for spatial up/downsampling used in this program.

Thank you,
Syaz. 



On Dec 19, 2013, at 2:20 AM, Stefano Sabatini <stefasab at gmail.com> wrote:

> On date Tuesday 2013-12-17 19:10:49 -0800, N. Syazrina M.A.S wrote:
>>  Hi,
>> 
>> How can I get the algorithm used/the source code for changing the
>> resolution & frame rate of a video using the FFMpeg tool. I would
>> like to know the method used for the up/downsampling of the spatial
>> & temporal resolution of the video.
> 
> Spatial resampling: this is done in the libswscale library.
> 
> Temporal resampling: we simply drop/duplicate frames, you may have a
> look at the fps filter in libavfilter.
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