add lib::video::inspect_async

src-lib/Cargo.lock

@@ -2,6 +2,457 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "async-channel"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ca33f4bc4ed1babef42cad36cc1f51fa88be00420404e5b1e80ab1b18f7678c"
+dependencies = [
+ "concurrent-queue",
+ "event-listener 4.0.1",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-io"
+version = "2.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6afaa937395a620e33dc6a742c593c01aced20aa376ffb0f628121198578ccc7"
+dependencies = [
+ "async-lock 3.2.0",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-io",
+ "futures-lite",
+ "parking",
+ "polling",
+ "rustix",
+ "slab",
+ "tracing",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "async-lock"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "287272293e9d8c41773cec55e365490fe034813a2f172f502d6ddcf75b2f582b"
+dependencies = [
+ "event-listener 2.5.3",
+]
+
+[[package]]
+name = "async-lock"
+version = "3.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7125e42787d53db9dd54261812ef17e937c95a51e4d291373b670342fa44310c"
+dependencies = [
+ "event-listener 4.0.1",
+ "event-listener-strategy",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-process"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15c1cd5d253ecac3d3cf15e390fd96bd92a13b1d14497d81abf077304794fb04"
+dependencies = [
+ "async-channel",
+ "async-io",
+ "async-lock 3.2.0",
+ "async-signal",
+ "blocking",
+ "cfg-if",
+ "event-listener 4.0.1",
+ "futures-lite",
+ "rustix",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "async-signal"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e47d90f65a225c4527103a8d747001fc56e375203592b25ad103e1ca13124c5"
+dependencies = [
+ "async-io",
+ "async-lock 2.8.0",
+ "atomic-waker",
+ "cfg-if",
+ "futures-core",
+ "futures-io",
+ "rustix",
+ "signal-hook-registry",
+ "slab",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "async-task"
+version = "4.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1d90cd0b264dfdd8eb5bad0a2c217c1f88fa96a8573f40e7b12de23fb468f46"
+
+[[package]]
+name = "atomic-waker"
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+checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
+
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+version = "1.1.0"
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+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "2.4.1"
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+checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+
+[[package]]
+name = "blocking"
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+checksum = "6a37913e8dc4ddcc604f0c6d3bf2887c995153af3611de9e23c352b44c1b9118"
+dependencies = [
+ "async-channel",
+ "async-lock 3.2.0",
+ "async-task",
+ "fastrand",
+ "futures-io",
+ "futures-lite",
+ "piper",
+ "tracing",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
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+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "concurrent-queue"
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+checksum = "d16048cd947b08fa32c24458a22f5dc5e835264f689f4f5653210c69fd107363"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3a430a770ebd84726f584a90ee7f020d28db52c6d02138900f22341f866d39c"
+dependencies = [
+ "cfg-if",
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+
+[[package]]
+name = "errno"
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+checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
+dependencies = [
+ "libc",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "event-listener"
+version = "2.5.3"
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+checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
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+name = "event-listener"
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+dependencies = [
+ "concurrent-queue",
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+[[package]]
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+checksum = "958e4d70b6d5e81971bebec42271ec641e7ff4e170a6fa605f2b8a8b65cb97d3"
+dependencies = [
+ "event-listener 4.0.1",
+ "pin-project-lite",
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+
+[[package]]
+name = "fastrand"
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+name = "futures-io"
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+checksum = "aeee267a1883f7ebef3700f262d2d54de95dfaf38189015a74fdc4e0c7ad8143"
+dependencies = [
+ "fastrand",
+ "futures-core",
+ "futures-io",
+ "parking",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "lib"
 version = "0.1.0"
+dependencies = [
+ "async-process",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.151"
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+ "errno",
+ "libc",
+ "linux-raw-sys",
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src-lib/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+async-process = "2.0.1"
 
 [lib]
 name = "lib"

src-lib/src/video.rs

@@ -131,6 +131,36 @@ fn _inspect(file: &String) -> Result<Inspection, String> {
 
 }
 
+pub async fn inspect_async(file: &String) -> Result<Vec<ContentSpan>, String> {
+   match _inspect_async(file).await {
+      Ok(inspection) => Ok(inspection.content_spans()),
+      Err(msg) => Err(msg)
+   }
+}
+
+async fn _inspect_async(file: &String) -> Result<Inspection, String> {
+   match async_process::Command::new("ffmpeg")
+      .args([
+         "-i", file,
+         "-vf", "mpdecimate,select='gt(scene,0.0)'",
+         "-af", "silencedetect=n=-50dB:d=1",
+         "-loglevel", "debug",
+         "-f", "null",
+         "-",
+      ])
+      .output().await {
+      Ok(output) => {
+         let stderr = String::from_utf8(output.stderr).unwrap();
+         let stdout = String::from_utf8(output.stdout).unwrap();
+         let line_iter = stderr.split("\n").chain(stdout.split("\n"));
+         Ok(Inspection{
+            lines: line_iter.map(|x| x.to_string()).collect(),
+         })
+      },
+      Err(msg) => Err(format!("failed to inspect with ffmpeg: {}", msg)),
+   }
+}
+
 struct Inspection {
    lines: Vec<String>,
 }
@@ -352,8 +382,9 @@ mod test_inspection {
 
       assert_eq!(28.14, inspection.duration());
 
-      assert_eq!(1, inspection.visual_transitions_scene_splits().len()); // TODO
+      assert_eq!(2, inspection.visual_transitions_scene_splits().len()); // TODO
-      assert_eq!(0.65986, inspection.visual_transitions_scene_splits()[0]); // TODO
+      assert_eq!(0.307763, inspection.visual_transitions_scene_splits()[0]); // TODO
+      assert_eq!(0.65986, inspection.visual_transitions_scene_splits()[1]); // TODO
 
       assert_eq!(4, inspection.visual_transitions_unstuck_frames().len());
       assert_eq!(