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ffmpeg: process all subtitle streams

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prj-2501 2023-06-20 00:08:34 +05:30
parent 58345767dc
commit be4b4fb8fe
1 changed files with 35 additions and 36 deletions
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27
src/adapters/ffmpeg.rs
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@ -54,7 +54,7 @@ struct FFprobeOutput {
} }
#[derive(Serialize, Deserialize)] #[derive(Serialize, Deserialize)]
struct FFprobeStream { struct FFprobeStream {
codec_type: String, // video,audio,subtitle index: i32, // stream index
} }
#[async_trait] #[async_trait]
@ -80,17 +80,13 @@ impl WritingFileAdapter for FFmpegAdapter {
} }
let inp_fname = filepath_hint; let inp_fname = filepath_hint;
let spawn_fail = |e| map_exe_error(e, "ffprobe", "Make sure you have ffmpeg installed."); let spawn_fail = |e| map_exe_error(e, "ffprobe", "Make sure you have ffmpeg installed.");
let has_subtitles = { let subtitle_streams = {
let probe = Command::new("ffprobe") let probe = Command::new("ffprobe")
.args(vec![ .args(vec![
"-v", "-v", "error", // show all errors
"error", "-select_streams", "s", // show only subtitle streams
"-select_streams", "-of", "json", // use json as output format
"s", "-show_entries", "stream=index", // show index of subtitle streams
"-of",
"json",
"-show_entries",
"stream=codec_type",
]) ])
.arg("-i") .arg("-i")
.arg(&inp_fname) .arg(&inp_fname)
@ -105,7 +101,7 @@ impl WritingFileAdapter for FFmpegAdapter {
)); ));
} }
let p: FFprobeOutput = serde_json::from_slice(&probe.stdout)?; let p: FFprobeOutput = serde_json::from_slice(&probe.stdout)?;
!p.streams.is_empty() p.streams
}; };
{ {
// extract file metadata (especially chapter names in a greppable format) // extract file metadata (especially chapter names in a greppable format)
@ -138,14 +134,16 @@ impl WritingFileAdapter for FFmpegAdapter {
return Err(format_err!("ffprobe failed: {:?}", exit)); return Err(format_err!("ffprobe failed: {:?}", exit));
} }
} }
if has_subtitles { if subtitle_streams.len() > 0 {
for probe_stream in subtitle_streams.iter() {
// extract subtitles // extract subtitles
let mut cmd = Command::new("ffmpeg"); let mut cmd = Command::new("ffmpeg");
cmd.arg("-hide_banner") cmd.arg("-hide_banner")
.arg("-loglevel") .arg("-loglevel").arg("panic")
.arg("panic")
.arg("-i") .arg("-i")
.arg(&inp_fname) .arg(&inp_fname)
.arg("-map")
.arg(format!("0:{}", probe_stream.index.to_string())) // 0 for first input
.arg("-f") .arg("-f")
.arg("webvtt") .arg("webvtt")
.arg("-"); .arg("-");
@ -166,6 +164,7 @@ impl WritingFileAdapter for FFmpegAdapter {
} }
} }
} }
}
Ok(()) Ok(())
} }
} }