On 2015/1/21 16:00, Reimar Döffinger wrote:
On 21.01.2015, at 07:17, Agatha Hu <a...@nvidia.com> wrote:
On 2015/1/18 4:01, Philip Langdale wrote:
Here's the reply from NVENC engineers
It is not same thing as SAR. It is the display aspect ratio i.e width/height =
DAR/SAR
The calculation below should be like
If (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0 )
av_reduce(&dw, &dh, avctx->sample_aspect_ratio.num * avctx->width,
avctx->sample_aspect_ratio.den * avctx->height, INT_MAX);
That doesn't answer anything.
Doing that, to keep the problem description short, creates different results
from libx264 and any other encoder we have for DVD resolution which is highly
undesirable for consistency and compatibility reasons if nothing else.
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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.
Agatha Hu
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