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-rw-r--r--DOCS/tech/mpcf.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/DOCS/tech/mpcf.txt b/DOCS/tech/mpcf.txt
index bb33815147..eabc152bf2 100644
--- a/DOCS/tech/mpcf.txt
+++ b/DOCS/tech/mpcf.txt
@@ -570,7 +570,7 @@ width/height
sample_width/sample_height (aspect ratio)
sample_width is the horizontal distance between samples
sample_width and sample_height MUST be relatively prime if not zero
- MUST be 0 if unknown
+ both MUST be 0 if unknown otherwise both MUST be non zero
colorspace_type
0 unknown