From a94fc05144362c0a59a56453fe22b68a53012de6 Mon Sep 17 00:00:00 2001
From: jianxingwu <jianxingwu@dj.cn>
Date: Fri, 15 May 2020 16:58:56 +0800
Subject: [PATCH] PrepareSnapshotSize  error :
 ratio=source.PrimaryVideoStream.Width / 0
 ratio=source.PrimaryVideoStream.Height / 0

Former-commit-id: 74593461d4cc928ce8474404980c4f7116daba0d
---
 FFMpegCore/FFMpeg/FFMpeg.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/FFMpegCore/FFMpeg/FFMpeg.cs b/FFMpegCore/FFMpeg/FFMpeg.cs
index 8bcdc1f..c9bf3ac 100644
--- a/FFMpegCore/FFMpeg/FFMpeg.cs
+++ b/FFMpegCore/FFMpeg/FFMpeg.cs
@@ -76,7 +76,7 @@ public static Bitmap Snapshot(MediaAnalysis source, Size? size = null, TimeSpan?
             {
                 if (size.Value.Width == 0)
                 {
-                    var ratio = source.PrimaryVideoStream.Width / (double) size.Value.Width;
+                    var ratio = source.PrimaryVideoStream.Height / (double) size.Value.Height;
 
                     size = new Size((int) (source.PrimaryVideoStream.Width * ratio),
                         (int) (source.PrimaryVideoStream.Height * ratio));
@@ -84,7 +84,7 @@ public static Bitmap Snapshot(MediaAnalysis source, Size? size = null, TimeSpan?
 
                 if (size.Value.Height == 0)
                 {
-                    var ratio = source.PrimaryVideoStream.Height / (double) size.Value.Height;
+                    var ratio = source.PrimaryVideoStream.Width / (double) size.Value.Width;
 
                     size = new Size((int) (source.PrimaryVideoStream.Width * ratio),
                         (int) (source.PrimaryVideoStream.Height * ratio));