Init

2026-08-05 12:32:52 +01:00
commit eb0d4fb1c5
46 changed files with 5623 additions and 0 deletions
@@ -0,0 +1,61 @@
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum VideoPipeline {
+    Copy,
+    Encode(VideoEncoder),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum VideoEncoder {
+    Libx264,
+}
+
+impl VideoPipeline {
+    pub fn ffmpeg_args(self, segment_seconds: u8) -> Vec<String> {
+        match self {
+            Self::Copy => vec!["-c:v".into(), "copy".into()],
+            Self::Encode(encoder) => encoder.ffmpeg_args(segment_seconds),
+        }
+    }
+}
+
+impl VideoEncoder {
+    pub fn portable_software() -> Self {
+        Self::Libx264
+    }
+
+    fn ffmpeg_args(self, segment_seconds: u8) -> Vec<String> {
+        match self {
+            Self::Libx264 => vec![
+                "-c:v".into(),
+                "libx264".into(),
+                "-preset".into(),
+                "veryfast".into(),
+                "-crf".into(),
+                "20".into(),
+                "-vf".into(),
+                "scale=trunc(iw/2)*2:trunc(ih/2)*2,format=yuv420p".into(),
+                "-force_key_frames".into(),
+                format!("expr:gte(t,n_forced*{segment_seconds})"),
+                "-sc_threshold".into(),
+                "0".into(),
+            ],
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{VideoEncoder, VideoPipeline};
+
+    #[test]
+    fn libx264_profile_is_browser_compatible_and_segment_aligned() {
+        let args = VideoPipeline::Encode(VideoEncoder::Libx264).ffmpeg_args(2);
+        assert!(args.windows(2).any(|pair| pair == ["-c:v", "libx264"]));
+        assert!(args.windows(2).any(|pair| pair == ["-crf", "20"]));
+        assert!(
+            args.windows(2)
+                .any(|pair| { pair == ["-force_key_frames", "expr:gte(t,n_forced*2)"] })
+        );
+        assert!(args.iter().any(|arg| arg.contains("format=yuv420p")));
+    }
+}