On Thu, 22 Jan 2015 12:15:44 +0800 Agatha Hu <a...@nvidia.com> wrote:
> We will fix the issue in driver, overscan compensation will be > applied to input DAR *only* if the DAR is 4:3 or 16:9, otherwise > won't unnecessarily modify the aspect ratio for resolutions like > 720x480 and 720x576. > The fix will be on future driver, I'll let you know when the branch > is released. Please, no. We do not want overscan compensation to be done by nvenc at all. The compensation makes nvenc inconsistent with *all* other encoders in ffmpeg. For every other encoder, if my input is 720x576 at [64/45], then my output is the same. It does not do anyone any favours for nvenc to implicitly alter the output DAR. There is a separate discussion about whether DAR 'compensation' is desirable in an encoder or not, but even if that discussion results in a decision to apply DAR compensation at encode time, it will be done globally in ffmpeg for all encoders - ie: at a layer above any individual codec. If nvidia feels it is important to offer this compensation 'feature', then I would ask for a configuration option to turn it off - otherwise we will need the 'de-compensation' logic in the patch I posted. Thanks, --phil _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
