From: John Stebbins <jstebbins.hb@gmail.com>
Date: Tue, 11 Apr 2017 18:23:56 +0000 (-0600)
Subject: scan: enable HBTF_NO_IDR when not enough previews found
X-Git-Tag: 1.1.0~597
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7e346baaa3ce8df0b03ab64ce78434aa68a8b5d3;p=handbrake

scan: enable HBTF_NO_IDR when not enough previews found

Setting this flag signals to libav to not wait for IDR or recovery
points before returning frames to us.  Some videos have neither IDRs or
recovery points, so this fixes transcoding such video.

Fixes https://github.com/HandBrake/HandBrake/issues/456
---

diff --git a/libhb/scan.c b/libhb/scan.c
index 663ddc6f1..8b5c5d47a 100644
--- a/libhb/scan.c
+++ b/libhb/scan.c
@@ -223,6 +223,10 @@ static void ScanFunc( void * _data )
         npreviews = DecodePreviews( data, title, 1 );
         if (npreviews < 2)
         {
+            // Try harder to get some valid frames
+            // Allow libav to return "corrupt" frames
+            hb_log("scan: Too few previews (%d), trying harder", npreviews);
+            title->flags |= HBTF_NO_IDR;
             npreviews = DecodePreviews( data, title, 0 );
         }
         if (npreviews == 0)