video/example-add-captions708
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Can encode raw buffers from gst into wave

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This commit is contained in:
Rafael Caricio 2022-03-30 16:44:14 +02:00
parent 902977545d
commit 152d02330b
Signed by: rafaelcaricio
GPG key ID: 3C86DBCE8E93C947
3 changed files with 97 additions and 1518 deletions
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1498
Cargo.lock generated
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9
Cargo.toml
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@ -10,14 +10,9 @@ gst = { package = "gstreamer", version = "0.18.3" }
gstreamer-app = "0.18.0"
gstreamer-base = "0.18.0"
gstreamer-video = { version = "0.18.5", features = ["v1_16"] }
gst-plugin-rusoto = { git = "https://gitlab.freedesktop.org/rafaelcaricio/gst-plugins-rs.git", branch = "transbin-accept-any-video-caps", version = "0.9.0" }
gst-plugin-closedcaption = { git = "https://gitlab.freedesktop.org/rafaelcaricio/gst-plugins-rs.git", branch = "transbin-accept-any-video-caps", version = "0.9.0" }
gst-plugin-textwrap = { git = "https://gitlab.freedesktop.org/rafaelcaricio/gst-plugins-rs.git", branch = "transbin-accept-any-video-caps", version = "0.9.0" }
ctrlc = "3.2.1"
signal-hook = "0.3.13"
#tokio = { version = "1.17", features = ["full"] }
#axum = "0.4.5"
#tower = "0.4.12"
#tower-http = { version = "0.2.2", features = ["add-extension"] }
log = "0.4.14"
pretty_env_logger = "0.4.0"
hound = "3.4"
byteorder = "1"

106
src/main.rs
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@ -1,82 +1,68 @@
use byteorder::{LittleEndian, ReadBytesExt};
use gst::prelude::*;
use gstreamer_app as gst_app;
use hound::{WavSpec, WavWriter};
use log::{debug, error, info, trace, warn};
use std::fs::File;
use std::io::{Cursor, Write};
use std::process;
use std::sync::{Arc, Mutex};
fn main() -> eyre::Result<()> {
pretty_env_logger::init();
gst::init()?;
gstrusoto::plugin_register_static()?;
gstrsclosedcaption::plugin_register_static()?;
gstrstextwrap::plugin_register_static()?;
let pipeline = gst::parse_launch(
r#"
souphttpsrc location="https://playertest.longtailvideo.com/adaptive/elephants_dream_v4/redundant.m3u8" ! hlsdemux name=demuxer
demuxer.src_0 ! decodebin ! cccombiner name=ccc_fr ! videoconvert ! x264enc ! video/x-h264,profile=main ! muxer.video_0
demuxer.src_1 ! decodebin ! audioconvert ! audioresample ! opusenc ! audio/x-opus,rate=48000,channels=2 ! muxer.audio_0
demuxer.src_2 ! decodebin ! audioconvert ! audioresample ! opusenc ! audio/x-opus,rate=48000,channels=2 ! muxer.audio_1
demuxer.src_3 ! decodebin ! audioconvert ! audioresample ! opusenc ! audio/x-opus,rate=48000,channels=2 ! muxer.audio_2
souphttpsrc location="https://playertest.longtailvideo.com/adaptive/elephants_dream_v4/media_b/french/ed.m3u8" ! hlsdemux ! subparse ! tttocea608 ! ccconverter ! closedcaption/x-cea-708,format=cc_data ! ccc_fr.caption
qtmux name=muxer ! filesink location=output_cae708_only_fr.mp4
uridecodebin uri=file:///Users/rafael.caricio/video.mkv name=dec dec.src_1 ! audio/x-raw !
audioconvert ! audiorate ! audioresample ! audio/x-raw,format=S16LE,rate=48000,channels=1 ! appsink name=sink
"#,
)?
.downcast::<gst::Pipeline>()
.unwrap();
pipeline.set_async_handling(true);
// souphttpsrc location="https://playertest.longtailvideo.com/adaptive/elephants_dream_v4/media_b/chinese/ed.m3u8" ! hlsdemux ! subparse ! tttocea608 ! ccconverter ! closedcaption/x-cea-708,format=cc_data ! ccc_ch.caption
// souphttpsrc location="https://playertest.longtailvideo.com/adaptive/elephants_dream_v4/media_b/french/ed.m3u8" ! hlsdemux ! subparse ! tttocea608 ! appsink name=sink
info!("Starting pipeline...");
let demuxer = pipeline.by_name("demuxer").unwrap();
let demuxer = pipeline.by_name("dec").unwrap();
demuxer.connect_pad_added(|_, pad| {
let name = pad.name();
let caps = pad.caps().unwrap();
let caps_type = caps.structure(0).unwrap().name();
// dbg!(name);
debug!("Pad {} added with caps {}", name, caps_type);
});
// let app_sink = pipeline
// .by_name("sink")
// .unwrap()
// .downcast::<gst_app::AppSink>()
// .unwrap();
// app_sink.set_sync(false);
// app_sink.set_callbacks(
// gst_app::AppSinkCallbacks::builder()
// .new_sample(move |app| {
// let sample = app.pull_sample().unwrap();
// let buffer = sample.buffer().unwrap();
//
// // We don't care about buffers that are not video
// if buffer
// .flags()
// .contains(gst::BufferFlags::DECODE_ONLY | gst::BufferFlags::GAP)
// {
// return Ok(gst::FlowSuccess::Ok);
// }
//
// // let data = buffer.map_readable().unwrap();
// // let text = std::str::from_utf8(&data).unwrap();
// // println!("Subtext = {}", text);
// dbg!(buffer);
//
// Ok(gst::FlowSuccess::Ok)
// })
// .build(),
// );
let raw_audio_content = Arc::new(Mutex::new(Vec::new()));
let app_sink = pipeline
.by_name("sink")
.unwrap()
.downcast::<gst_app::AppSink>()
.unwrap();
app_sink.set_sync(false);
app_sink.set_callbacks(
gst_app::AppSinkCallbacks::builder()
.new_sample({
let raw_audio_content = raw_audio_content.clone();
move |app| {
let sample = app.pull_sample().unwrap();
let buffer = sample.buffer().unwrap();
let data = buffer.map_readable().unwrap();
let mut raw_audio_content = raw_audio_content.lock().unwrap();
raw_audio_content.extend(data.to_vec());
Ok(gst::FlowSuccess::Ok)
}
})
.build(),
);
let context = glib::MainContext::default();
let main_loop = glib::MainLoop::new(Some(&context), false);
pipeline.set_state(gst::State::Playing)?;
let bus = pipeline.bus().unwrap();
bus.add_watch({
let main_loop = main_loop.clone();
@ -116,5 +102,27 @@ fn main() -> eyre::Result<()> {
pipeline.set_state(gst::State::Null)?;
let mut out_wav_buffer = Cursor::new(Vec::new());
let mut writer = WavWriter::new(
&mut out_wav_buffer,
WavSpec {
channels: 1,
sample_rate: 48000,
bits_per_sample: 16,
sample_format: hound::SampleFormat::Int,
},
)
.unwrap();
let mut raw_audio_content = Cursor::new(raw_audio_content.lock().unwrap().to_vec());
while let Ok(sample) = raw_audio_content.read_i16::<LittleEndian>() {
writer.write_sample(sample).unwrap();
}
drop(writer);
let mut file = File::create("out.wav")?;
file.write_all(&out_wav_buffer.into_inner())?;
Ok(())
}