diff --git a/DownKyi.Core/FFMpeg/FFMpeg.cs b/DownKyi.Core/FFMpeg/FFMpeg.cs
index b4e72fd..ecff8d9 100644
--- a/DownKyi.Core/FFMpeg/FFMpeg.cs
+++ b/DownKyi.Core/FFMpeg/FFMpeg.cs
@@ -32,15 +32,38 @@ public class FFMpeg
     public bool MergeVideo(string audio, string video, string destVideo)
     {
         if (!File.Exists(audio) && !File.Exists(video)) return false;
-        FFMpegArguments
+
+        var arguments = FFMpegArguments
             .FromFileInput(audio)
             .AddFileInput(video)
             .OutputToFile(destVideo, true, options => options
+                .WithCustomArgument("-strict -2")
                 .WithAudioCodec("copy")
                 .WithVideoCodec("copy")
                 .ForceFormat("mp4")
-            )
-            .NotifyOnError(s => LogManager.Debug("ffmpeg", s))
+            );
+        if (audio == null || !File.Exists(audio))
+        {
+            arguments = FFMpegArguments.FromFileInput(video).OutputToFile(
+                destVideo,
+                true,
+                options => options.WithCustomArgument("-strict -2").WithVideoCodec("copy").WithAudioCodec("copy").ForceFormat("mp4")
+            );
+        }
+
+        if (video == null || !File.Exists(video))
+        {
+            arguments = FFMpegArguments.FromFileInput(audio).OutputToFile(
+                destVideo,
+                true,
+                options => options.WithCustomArgument("-strict -2").DisableChannel(Channel.Video).WithAudioCodec("copy")
+            );
+        }
+
+        LogManager.Debug(Tag, arguments.Arguments);
+
+        arguments
+            .NotifyOnError(s => LogManager.Debug(Tag, s))
             .ProcessSynchronously();
         try
         {
diff --git a/README.md b/README.md
index 3314839..7f3db12 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@
 
 [![GitHub Repo stars](https://img.shields.io/github/stars/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/stargazers)
 [![GitHub forks](https://img.shields.io/github/forks/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/network)
-[![GitHub forks](https://img.shields.io/github/issues/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/issues)
-[![GitHub forks](https://img.shields.io/github/license/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/blob/main/LICENSE)
+[![GitHub issues](https://img.shields.io/github/issues/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/issues)
+[![LICENSE](https://img.shields.io/github/license/yaobiao131/downkyicore)](https://github.com/yaobiao131/downkyicore/blob/main/LICENSE)
 
 </div>