option保护

BFFramework/Classes/PQGPUImage/Source/iOS/MovieOutput.swift

@@ -63,7 +63,9 @@ public class MovieOutput: ImageConsumer, AudioEncodingTarget {
         imageProcessingShareGroup = sharedImageProcessingContext.context.sharegroup
         let movieProcessingContext = OpenGLContext()
 
-        self.size = size
+        
+        self.size = Size(width: size.width == 0 ? 1080 : size.width,
+                           height: size.height == 0 ? 1080 : size.height)
 
         assetWriter = try AVAssetWriter(url: URL, fileType: fileType)
 
@@ -288,8 +290,13 @@ public class MovieOutput: ImageConsumer, AudioEncodingTarget {
         let bufferSize = GLSize(size)
         var cachedTextureRef: CVOpenGLESTexture?
         _ = CVOpenGLESTextureCacheCreateTextureFromImage(kCFAllocatorDefault, movieProcessingContext.coreVideoTextureCache, pixelBuffer, nil, GLenum(GL_TEXTURE_2D), GL_RGBA, bufferSize.width, bufferSize.height, GLenum(GL_BGRA), GLenum(GL_UNSIGNED_BYTE), 0, &cachedTextureRef)
-        let cachedTexture = CVOpenGLESTextureGetName(cachedTextureRef!)
+        
+        //cachedTextureRef可能为空，导致使用 cachedTextureRef! 语法崩溃
+        guard let newCachedTextureRef = cachedTextureRef else {
+            return
+        }
 
+        let cachedTexture = CVOpenGLESTextureGetName(newCachedTextureRef)
         renderFramebuffer = try Framebuffer(context: movieProcessingContext, orientation: .portrait, size: bufferSize, textureOnly: false, overriddenTexture: cachedTexture)
 
         renderFramebuffer.activateFramebufferForRendering()