From 71c39a06c83b7bfbee136fd40ac710bdda3a237c Mon Sep 17 00:00:00 2001 From: James Zern Date: Fri, 20 Apr 2018 12:59:50 -0700 Subject: [PATCH] webp-container-spec: correct frame duration=0 note the interpretation of a 0 duration depends on the implementation; merging of multiple frames isn't guaranteed, some may enforce a minimum duration. BUG=webp:380 Change-Id: Idf592049d2092e4cc5cfb2e4c59ddbc91bd52f9c --- doc/webp-container-spec.txt | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/doc/webp-container-spec.txt b/doc/webp-container-spec.txt index dbb49f14..94a7ca29 100644 --- a/doc/webp-container-spec.txt +++ b/doc/webp-container-spec.txt @@ -446,8 +446,9 @@ Frame Height Minus One: 24 bits (_uint24_) Frame Duration: 24 bits (_uint24_) : The time to wait before displaying the next frame, in 1 millisecond units. - In particular, frame duration of 0 is useful when one wants to update - multiple areas of the canvas at once during the animation. + Note the interpretation of frame duration of 0 (and often <= 10) is + implementation defined. Many tools and browsers assign a minimum duration + similar to GIF. Reserved: 6 bits