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Recalculate trickplay image height for anamorphic videos

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Signed-off-by: gnattu <gnattuoc@me.com>
This commit is contained in:
gnattu 2024-05-08 08:33:23 +08:00
parent 06a5ddda5e
commit c6e29647fc
2 changed files with 33 additions and 10 deletions
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27
MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
View File

@ -3172,7 +3172,9 @@ namespace MediaBrowser.Controller.MediaEncoding
int? requestedMaxHeight) int? requestedMaxHeight)
{ {
var isV4l2 = string.Equals(videoEncoder, "h264_v4l2m2m", StringComparison.OrdinalIgnoreCase); var isV4l2 = string.Equals(videoEncoder, "h264_v4l2m2m", StringComparison.OrdinalIgnoreCase);
var isMjpeg = videoEncoder is not null && videoEncoder.Contains("mjpeg", StringComparison.OrdinalIgnoreCase);
var scaleVal = isV4l2 ? 64 : 2; var scaleVal = isV4l2 ? 64 : 2;
var targetAr = isMjpeg ? "(a*sar)" : "a"; // manually calculate AR when using mjpeg encoder
// If fixed dimensions were supplied // If fixed dimensions were supplied
if (requestedWidth.HasValue && requestedHeight.HasValue) if (requestedWidth.HasValue && requestedHeight.HasValue)
@ -3201,10 +3203,11 @@ namespace MediaBrowser.Controller.MediaEncoding
return string.Format( return string.Format(
CultureInfo.InvariantCulture, CultureInfo.InvariantCulture,
@"scale=trunc(min(max(iw\,ih*a)\,min({0}\,{1}*a))/{2})*{2}:trunc(min(max(iw/a\,ih)\,min({0}/a\,{1}))/2)*2", @"scale=trunc(min(max(iw\,ih*{3})\,min({0}\,{1}*{3}))/{2})*{2}:trunc(min(max(iw/{3}\,ih)\,min({0}/{3}\,{1}))/2)*2",
maxWidthParam, maxWidthParam,
maxHeightParam, maxHeightParam,
scaleVal); scaleVal,
targetAr);
} }
// If a fixed width was requested // If a fixed width was requested
@ -3220,8 +3223,9 @@ namespace MediaBrowser.Controller.MediaEncoding
return string.Format( return string.Format(
CultureInfo.InvariantCulture, CultureInfo.InvariantCulture,
"scale={0}:trunc(ow/a/2)*2", "scale={0}:trunc(ow/{1}/2)*2",
widthParam); widthParam,
targetAr);
} }
// If a fixed height was requested // If a fixed height was requested
@ -3231,9 +3235,10 @@ namespace MediaBrowser.Controller.MediaEncoding
return string.Format( return string.Format(
CultureInfo.InvariantCulture, CultureInfo.InvariantCulture,
"scale=trunc(oh*a/{1})*{1}:{0}", "scale=trunc(oh*{2}/{1})*{1}:{0}",
heightParam, heightParam,
scaleVal); scaleVal,
targetAr);
} }
// If a max width was requested // If a max width was requested
@ -3243,9 +3248,10 @@ namespace MediaBrowser.Controller.MediaEncoding
return string.Format( return string.Format(
CultureInfo.InvariantCulture, CultureInfo.InvariantCulture,
@"scale=trunc(min(max(iw\,ih*a)\,{0})/{1})*{1}:trunc(ow/a/2)*2", @"scale=trunc(min(max(iw\,ih*{2})\,{0})/{1})*{1}:trunc(ow/{2}/2)*2",
maxWidthParam, maxWidthParam,
scaleVal); scaleVal,
targetAr);
} }
// If a max height was requested // If a max height was requested
@ -3255,9 +3261,10 @@ namespace MediaBrowser.Controller.MediaEncoding
return string.Format( return string.Format(
CultureInfo.InvariantCulture, CultureInfo.InvariantCulture,
@"scale=trunc(oh*a/{1})*{1}:min(max(iw/a\,ih)\,{0})", @"scale=trunc(oh*{2}/{1})*{1}:min(max(iw/{2}\,ih)\,{0})",
maxHeightParam, maxHeightParam,
scaleVal); scaleVal,
targetAr);
} }
return string.Empty; return string.Empty;

16
MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
View File

@ -824,6 +824,22 @@ namespace MediaBrowser.MediaEncoding.Encoder
options.EnableTonemapping = false; options.EnableTonemapping = false;
} }
if (imageStream.Width is not null && imageStream.Height is not null)
{
// For hardware trickplay encoders, we need to re-calculate the size because they used fixed scale dimensions
var darParts = imageStream.AspectRatio.Split(":");
var (wa, ha) = (int.Parse(darParts[0], CultureInfo.InvariantCulture), int.Parse(darParts[1], CultureInfo.InvariantCulture));
// When dimension / DAR does not equal to 1:1, then the frames are most likely stored stretched.
// Note: this might be incorrect for 3D videos as the SAR stored might be per eye instead of per video, but we really can do little about it.
var shouldResetHeight = imageStream.Width * ha != imageStream.Height * wa;
if (shouldResetHeight)
{
// SAR = DAR * Height / Width
// RealHeight = Height / SAR = Height / (DAR * Height / Width) = Width / DAR
imageStream.Height = Convert.ToInt32(imageStream.Width.Value * (double)ha / wa);
}
}
var baseRequest = new BaseEncodingJobOptions { MaxWidth = maxWidth, MaxFramerate = (float)(1.0 / interval.TotalSeconds) }; var baseRequest = new BaseEncodingJobOptions { MaxWidth = maxWidth, MaxFramerate = (float)(1.0 / interval.TotalSeconds) };
var jobState = new EncodingJobInfo(TranscodingJobType.Progressive) var jobState = new EncodingJobInfo(TranscodingJobType.Progressive)
{ {