feat: origin filename support.

src/video_merger.rs

@@ -4,11 +4,11 @@ use std::io::Result;
 use std::path::{Path, PathBuf};
 use std::fs;
 
-pub fn merge_video_and_audio(video_path: &Path, audio_path: &Path, dry_run: bool, overwrite: bool) -> Result<PathBuf> {
+pub fn merge_video_and_audio(video_path: &Path, audio_path: &Path, output_name: &str, output_dir: &Path, dry_run: bool, overwrite: bool) -> Result<PathBuf> {
     let origin_video_extension = video_path.extension().unwrap().to_str().unwrap();
     let origin_filename = format!("original.{}", &origin_video_extension);
     let origin_path = video_path.parent().unwrap().join(origin_filename);
-    let output_path = video_path.with_extension("mp4");
+    let output_path = output_dir.join(format!("{}.mp4", output_name));
 
     if dry_run {
         let mut script = ShellScript::new();
@@ -24,7 +24,7 @@ pub fn merge_video_and_audio(video_path: &Path, audio_path: &Path, dry_run: bool
             .input_var("VIDEO_BACKUP")
             .input_var("AUDIO_AAC")
             .codec("copy")
-            .output_var("VIDEO_OUTPUT")
+            .output(&output_path)
             .execute(true)?;
         return Ok(output_path);
     }