From: Gautam Ramakrishnan <[email protected]>
This patch adds documentation for the utility and usage
of "layer_rates" option used in the JPEG2000 encoder.
---
doc/encoders.texi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/doc/encoders.texi b/doc/encoders.texi
index fd9235a05a..481ad2fb3d 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -1401,6 +1401,22 @@ Possible values are:
@end table
Set to @code{lrcp} by default.
+@item layer_rates @var{string}
+By default, compression is done using the quality metric. This option allows
for
+compression using compression ratio. The compression ratio for each level could
+be specified. The compression ratio of a layer @code{l} species the what ratio
of
+total file size is contained in the first @code{l} layers.
+
+Example usage:
+
+@example
+ffmpeg -i input.bmp -c:v jpeg2000 -layer_rates "100,10,1" output.j2k
+@end example
+
+This would compress the image to contain 3 layers, where the data contained in
the
+first layer would be compressed by 1000 times, compressed by 100 in the first
two layers,
+and shall contain all data while using all 3 layers.
+
@end table
@section librav1e
--
2.17.1
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