尝试传入resolution，不使用scale自适应模板

entity/ffmpeg.py

@@ -33,6 +33,7 @@ class FfmpegTask(object):
         self.mute = True
         self.speed = 1
         self.frame_rate = 25
+        self.resolution = None
         self.subtitles = []
         self.luts = []
         self.audios = []
@@ -239,7 +240,13 @@ class FfmpegTask(object):
                 input_index = input_args.count("-i")
                 input_args.append("-i")
                 input_args.append(overlay)
-                filter_args.append(f"{video_output_str}[{input_index}:v]scale=rw:rh[v]")
+                if self.resolution:
+                    filter_args.append(f"{video_output_str}scale={self.resolution.replace('x', ':')}[v]")
+                else:
+                    if os.getenv("OLD_FFMPEG"):
+                        filter_args.append(f"{video_output_str}[{input_index}:v]scale2ref=iw:ih[v]")
+                    else:
+                        filter_args.append(f"{video_output_str}[{input_index}:v]scale=rw:rh[v]")
                 filter_args.append(f"[v][{input_index}:v]overlay=1:eof_action=endall[v]")
                 video_output_str = "[v]"
             for subtitle in self.subtitles: