feats: added renice module added jobs added ffmpeg command builders.

src/transcode/job.rs

@@ -0,0 +1,33 @@
+use std::path::PathBuf;
+use std::process::{Child, Command};
+use crate::configuration::{Config, ConfigFFmpeg};
+
+pub struct TranscodeJob {
+    pub input: String,
+    pub output: String
+}
+
+impl TranscodeJob {
+    pub fn new<S: Into<String>>(input: S, output: S) -> TranscodeJob {
+        TranscodeJob {
+            input: input.into(),
+            output: output.into()
+        }
+    }
+
+    pub fn build_command(&self, ffmpeg_config: &ConfigFFmpeg) -> Command {
+        let options = ffmpeg_config.build_command_options(&self.input, &self.output);
+        let mut command = Command::new("ffmpeg");
+        command.args(options.to_args());
+        command
+    }
+
+    pub fn check_if_exists(&self) -> bool {
+        std::path::Path::new(&self.output).exists()
+    }
+
+    pub fn run(&self, ffmpeg_config: &ConfigFFmpeg) -> Result<Child, std::io::Error> {
+        let mut command = self.build_command(ffmpeg_config);
+        command.spawn()
+    }
+}

src/transcode/mod.rs

@@ -0,0 +1 @@
+pub mod job;