add framerate options

Former-commit-id: 340d6cf9e0212cdb596f95007249887f504005e9

src/workunit.rs

@@ -47,7 +47,9 @@ pub struct EOptions {
     pub ffmpeg: String,
     pub aomenc: String,
     pub two_pass: bool,
-    pub pix_fmt: EPixFmt
+    pub pix_fmt: EPixFmt,
+    #[serde(default)]
+    pub fps: Option<(u16, u16)>
 }
 impl Default for EOptions {
     fn default() -> Self {
@@ -55,7 +57,8 @@ impl Default for EOptions {
             ffmpeg: String::default(),
             aomenc: "--lag-in-frames=25 --tile-columns=0 --tile-rows=0 --enable-fwd-kf=1 --bit-depth=10 --cpu-used=3 --cq-level=30 --end-usage=q".to_string(),
             two_pass: false,
-            pix_fmt: EPixFmt::I422
+            pix_fmt: EPixFmt::I422,
+            fps: Option::None
         }
     }
 }