vo: change tscale to oversample by default

Keep it sharp, let users opt-in more blurry result.

DOCS/interface-changes.rst

@@ -65,6 +65,7 @@ Interface changes
       `--demuxer-cache-unlink-files`
     - enable `--correct-downscaling`, `--linear-downscaling`, `--sigmoid-upscaling`
     - `--cscale` defaults to `--scale` if not defined
+    - change `--tscale` default to `oversample`
  --- mpv 0.36.0 ---
     - add `--target-contrast`
     - Target luminance value is now also applied when ICC profile is used.

DOCS/man/options.rst

@@ -5325,7 +5325,7 @@ them.
     The filter used for interpolating the temporal axis (frames). This is only
     used if ``--interpolation`` is enabled. The only valid choices for
     ``--tscale`` are separable convolution filters (use ``--tscale=help`` to
-    get a list). The default is ``mitchell``.
+    get a list). The default is ``oversample``.
 
     Common ``--tscale`` choices include ``oversample``, ``linear``,
     ``catmull_rom``, ``mitchell``, ``gaussian``, or ``bicubic``. These are

video/out/gpu/video.c

@@ -309,8 +309,7 @@ static const struct gl_video_opts gl_video_opts_def = {
          .cutoff = 0.001}, // dscale
         {{NULL, .params={NAN, NAN}}, {.params = {NAN, NAN}},
          .cutoff = 0.001}, // cscale
-        {{"mitchell", .params={NAN, NAN}}, {.params = {NAN, NAN}},
-         .clamp = 1, }, // tscale
+        {{"oversample", .params={NAN, NAN}}, {.params = {NAN, NAN}}}, // tscale
     },
     .scaler_resizes_only = true,
     .correct_downscaling = true,