From 14794529808c84e29a1974e004d76db3977292b2 Mon Sep 17 00:00:00 2001
From: shun-iwasawa <shun-iwasawa@users.noreply.github.com>
Date: Jun 15 2018 07:39:30 +0000
Subject: fix webm output (#2065)



---

diff --git a/toonz/sources/image/ffmpeg/tiio_webm.cpp b/toonz/sources/image/ffmpeg/tiio_webm.cpp
index 584ba5e..c496841 100644
--- a/toonz/sources/image/ffmpeg/tiio_webm.cpp
+++ b/toonz/sources/image/ffmpeg/tiio_webm.cpp
@@ -79,6 +79,8 @@ TLevelWriterWebm::~TLevelWriterWebm() {
   preIArgs << "-framerate";
   preIArgs << QString::number(m_frameRate);
 
+  postIArgs << "-auto-alt-ref";
+  postIArgs << "0";
   postIArgs << "-c:v";
   postIArgs << "libvpx";
   postIArgs << "-s";