🚧 No shelling out for video encoding too

.cargo/config.toml

···
 [alias]
 xtask = "run --package xtask --release --"
+
+# [target.x86_64-pc-windows-gnu]
+# linker = "C:\\msys64\\mingw64\\bin\\gcc.exe"

Cargo.lock

···
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···
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···
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···
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···
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···
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···
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···
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···
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···
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 [[package]]
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···
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···
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···
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+
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···
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 [[package]]
···
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···
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···
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 [[package]]
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···
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···
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···
  "measure_time",
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+ "ndarray",
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  "once_cell",
  "rand",
  "resvg",
+ "rgb2yuv420",
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  "serde",
···
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  "tiny_http",
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+ "video-rs",
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···
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···
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···
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···
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···
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···
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 [[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
+[[package]]
 name = "utf8parse"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
 [[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
+[[package]]
 name = "version_check"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "video-rs"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c9f6df3b49d862ea35d2c509801ee64983f2169ea02e3a8642e69ce2230e47c"
+dependencies = [
+ "ffmpeg-next",
+ "ndarray",
+ "tracing",
+ "url",
+]
 
 [[package]]
 name = "vst3-com"
···
 ]
 
 [[package]]
+name = "write16"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1890f4022759daae28ed4fe62859b1236caebfc61ede2f63ed4e695f3f6d936"
+
+[[package]]
+name = "writeable"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e9df38ee2d2c3c5948ea468a8406ff0db0b29ae1ffde1bcf20ef305bcc95c51"
+
+[[package]]
 name = "xmlwriter"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
···
 ]
 
 [[package]]
+name = "yoke"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "120e6aef9aa629e3d4f52dc8cc43a015c7724194c97dfaf45180d2daf2b77f40"
+dependencies = [
+ "serde",
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2380878cad4ac9aac1e2435f3eb4020e8374b5f13c296cb75b4620ff8e229154"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cff3ee08c995dee1859d998dea82f7374f2826091dd9cd47def953cae446cd2e"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "595eed982f7d355beb85837f651fa22e90b3c044842dc7f2c2842c086f295808"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+ "synstructure",
+]
+
+[[package]]
 name = "zeroize"
 version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
+
+[[package]]
+name = "zerovec"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa2b893d79df23bfb12d5461018d408ea19dfafe76c2c7ef6d4eba614f8ff079"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.98",
+]
 
 [[package]]
 name = "zune-core"

Cargo.toml

···
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-nih_plug = { git = "https://github.com/robbert-vdh/nih-plug.git", features = ["assert_process_allocs"] }
+nih_plug = { git = "https://github.com/robbert-vdh/nih-plug.git", features = [
+    "assert_process_allocs",
+] }
 anyhow = "1.0.81"
 chrono = "0.4.23"
 docopt = "1.1.1"
···
 measure_time = "0.9.0"
 env_logger = "0.11.6"
 log = "0.4.26"
+video-rs = { version = "0.10.3", features = ["ndarray"] }
+ndarray = "0.16.1"
+rgb2yuv420 = "0.2.3"
 
 
 [dev-dependencies]

src/canvas.rs

···
 use itertools::Itertools as _;
 use measure_time::info_time;
 use rand::Rng;
+use rgb2yuv420::convert_rgb_to_yuv420p;
 
 use crate::{
     layer::Layer, objects::Object, random_color, Angle, Color, ColorMapping, ColoredObject,
···
         self.remove_background()
     }
 
-    // previous_frame_at gives path to the previously rendered frame, which allows to copy on cache hits instead of having to re-write bytes again
-    pub fn render_to_png(
-        &mut self,
-        at: &str,
-        resolution: u32,
-        previous_frame_at: Option<&str>,
-    ) -> anyhow::Result<()> {
-        info_time!("render_to_png");
+    pub fn resolution_to_size(&self, resolution: u32) -> (u32, u32) {
         let aspect_ratio = self.aspect_ratio();
         let (height, width) = if aspect_ratio > 1.0 {
             // landscape: resolution is width
···
             // portrait: resolution is height
             ((resolution as f32 / aspect_ratio) as u32, resolution)
         };
+    }
 
+    // previous_frame_at gives path to the previously rendered frame, which allows to copy on cache hits instead of having to re-write bytes again
+    pub fn render_to_png(
+        &mut self,
+        at: &str,
+        resolution: u32,
+        previous_frame_at: Option<&str>,
+    ) -> anyhow::Result<()> {
+        info_time!("render_to_png");
+        let (width, height) = self.resolution_to_size(resolution);
         if let Some(previous_frame_at) = previous_frame_at {
             match self.render_to_pixmap(width, height)? {
                 None => {
···
         self.png_render_cache = Some(new_svg_contents);
 
         Ok(Some(pixmap))
+    }
+
+    pub fn render_to_hwc_frame(&mut self, resolution: u32) -> anyhow::Result<video_rs::Frame> {
+        info_time!("render_to_hwc_frame");
+        let (width, height) = self.resolution_to_size(resolution);
+        let pixmap = self.render_to_pixmap_no_cache(width, height)?;
+        let rgb_pixels: [u8] = pixmap
+            .pixels()
+            .iter()
+            .map(|pixel| [pixel.red(), pixel.green(), pixel.blue()])
+            .flatten()
+            .collect();
+
+        Ok(video_rs::Frame::from(convert_rgb_to_yuv420p(
+            &rgb_pixels,
+            width,
+            height,
+            tiny_skia::BYTES_PER_PIXEL,
+        )))
     }
 
     fn usvg_tree_to_pixmap(

src/video.rs

···
 use chrono::{DateTime, NaiveDateTime};
 use indicatif::{ProgressBar, ProgressIterator};
 use measure_time::info_time;
+use video_rs::Time;
 
 use crate::{
     sync::SyncData,
···
     pub duration_override: Option<usize>,
     pub start_rendering_at: usize,
     pub progress_bar: indicatif::ProgressBar,
+    encoder: Option<video_rs::Encoder>,
 }
 
 pub struct Hook<C> {
···
             duration_override: None,
             start_rendering_at: 0,
             progress_bar: setup_progress_bar(0, ""),
+            encoder: None,
         }
+    }
+
+    fn setup_encoder(&self, output_path: String) -> Self {
+        self.encoder = video_rs::Encoder::new(
+            output_path,
+            video_rs::encode::Settings::preset_h264_yuv420p(
+                self.initial_canvas.width(),
+                self.initial_canvas.height(),
+                true,
+            ),
+        )
     }
 
     pub fn sync_audio_with(self, sync_data_path: &str) -> Self {
···
             }
 
             if context.frame != previous_rendered_frame {
-                canvas.render_to_png(
-                    &self.frame_output_path(context.frame),
-                    self.resolution,
-                    Some(&self.frame_output_path(previous_rendered_frame)),
+                // canvas.render_to_png(
+                //     &self.frame_output_path(context.frame),
+                //     self.resolution,
+                //     Some(&self.frame_output_path(previous_rendered_frame)),
+                // )?;
+                self.encoder.expect("Encoder was not initialized").encode(
+                    &canvas.render_to_hwc_frame(self.resolution),
+                    Time::from_secs_f64(context.ms as f64 * 1e-3),
                 )?;
+
                 written_frames_count += 1;
 
                 previous_rendered_beat = context.beat;
···
 
     pub fn render(&self, output_file: String) -> Result<()> {
         info_time!("render");
-        // Ensure ffmpeg is installed
-        if !is_binary_installed("ffmpeg") {
-            panic!("ffmpeg is not installed. Please install it.");
-        }
 
-        create_dir_all(self.frames_output_directory)?;
-        remove_dir_all(self.frames_output_directory)?;
-        create_dir(self.frames_output_directory)?;
+        // create_dir_all(self.frames_output_directory)?;
+        // remove_dir_all(self.frames_output_directory)?;
+        // create_dir(self.frames_output_directory)?;
         create_dir_all(Path::new(&output_file).parent().unwrap())?;
+
+        self.setup_encoder(output_file);
 
         self.progress_bar.set_position(0);
         self.progress_bar.set_prefix("Rendering");