From: jstebbins <jstebbins@b64f7644-9d1e-0410-96f1-a4d463321fa5>
Date: Thu, 16 Dec 2010 23:38:58 +0000 (+0000)
Subject: Adjust x264 qpmin for QT compatibility.
X-Git-Url: http://git.osdn.jp/view?a=commitdiff_plain;h=4c226095a05fff99f835b22278ea6e777ebd37f9;p=handbrake-jp%2Fhandbrake-jp-git.git

Adjust x264 qpmin for QT compatibility.
A recent change in x264 lowered the default qpmin to 0.
QuickTime has trouble with very low QPs (resulting in visual artifacts).
Known to affect QuickTime 7, QuickTime X and iTunes.
Testing shows that a qpmin of 3 works.


git-svn-id: svn://localhost/HandBrake/trunk@3708 b64f7644-9d1e-0410-96f1-a4d463321fa5
---

diff --git a/libhb/encx264.c b/libhb/encx264.c
index fe9a11f8..270692c8 100644
--- a/libhb/encx264.c
+++ b/libhb/encx264.c
@@ -88,6 +88,12 @@ int encx264Init( hb_work_object_t * w, hb_job_t * job )
     /* Enable metrics */
     param.analyse.b_psnr = 1;
     param.analyse.b_ssim = 1;
+
+    /* QuickTime has trouble with very low QPs (resulting in visual artifacts).
+     * Known to affect QuickTime 7, QuickTime X and iTunes.
+     * Testing shows that a qpmin of 3 works.
+     */
+    param.rc.i_qp_min = 3;
     
     param.i_threads    = ( hb_get_cpu_count() * 3 / 2 );
     param.i_width      = job->width;