[Libav-user] Configuring an encoder with SPS/PPS from decoded frame

[Georges House]

On Fri, 4 Aug 2017, at 11:15 PM, Georges House wrote:
> I'm transcoding different files (encoded in h264) and would like to use
> the same output parameters as extracted from the input.
> 
> I would then be able to change some specific encoding parameters, though
> most need to be the same.
> 
> Would I need to use the SPS/PPS or is there a better way?
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Ok, I've better understood its really hard to match SPS exactly. So
following on that, which parameters of SPS/PPS need to match if i'm
decoding a file which was edited.

In the sense that my h264 player cached the SPS from the original
encoded file, and is trying to decode a file which was slightly edited,
and therefore would have a slightly different SPS.

G