Feat: window capture via PrintWindow with server-side HWND routing by clientID

client/X264Encoder.cpp

@@ -68,6 +68,9 @@ bool CX264Encoder::open(int width, int height, int fps, int crf)
 
 bool CX264Encoder::open(x264_param_t * param)
 {
+    // x264_encoder_open 在 0×0 时已完成 x264_param_strdup 才报错，需在此拦截
+    if (param->i_width < 2 || param->i_height < 2) return false;
+
     m_pPicIn  = (x264_picture_t*)calloc(1, sizeof(x264_picture_t));
     m_pPicOut = (x264_picture_t*)calloc(1, sizeof(x264_picture_t));