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https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
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fmp4: dash_vod example: use dash-mpd to generate the manifest
Maybe a bit overkill for such simple example but more exemplary for actual applications. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1177>
This commit is contained in:
Guillaume Desmottes
parent
dba91bceca
commit
371ac83169
2 changed files with 79 additions and 41 deletions
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@ -28,6 +28,9 @@ gst-check = { package = "gstreamer-check", git = "https://gitlab.freedesktop.org
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gst-pbutils = { package = "gstreamer-pbutils", git = "https://gitlab.freedesktop.org/gstreamer/gstreamer-rs", features = ["v1_20"] }
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m3u8-rs = "5.0"
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chrono = "0.4"
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dash-mpd = { version = "0.7", default-features = false }
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quick-xml = { version = "0.28", features = ["serialize"] }
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serde = "1"
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[build-dependencies]
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gst-plugin-version-helper = { path="../../version-helper" }
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@ -14,7 +14,6 @@
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use gst::prelude::*;
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use std::fmt::Write;
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use std::path::PathBuf;
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use std::sync::{Arc, Mutex};
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@ -151,29 +150,30 @@ fn main() -> Result<(), Error> {
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println!("writing manifest to {}", path.display());
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let duration = state.end_time.opt_checked_sub(state.start_time).ok().flatten().unwrap().mseconds() as f64 / 1000.0;
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let duration = state
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.end_time
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.opt_checked_sub(state.start_time)
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.ok()
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.flatten()
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.unwrap()
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.mseconds();
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// Write the whole segment timeline out here, compressing multiple segments with
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// the same duration to a repeated segment.
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let mut segment_timeline = String::new();
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let mut write_segment = |start: gst::ClockTime, duration: gst::ClockTime, repeat: usize| {
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if repeat > 0 {
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writeln!(
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&mut segment_timeline,
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" <S t=\"{time}\" d=\"{duration}\" r=\"{repeat}\" />",
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time = start.mseconds(),
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duration = duration.mseconds(),
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repeat = repeat
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).unwrap();
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} else {
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writeln!(
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&mut segment_timeline,
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" <S t=\"{time}\" d=\"{duration}\" />",
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time = start.mseconds(),
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duration = duration.mseconds()
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).unwrap();
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}
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};
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let mut segments = vec![];
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let mut write_segment =
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|start: gst::ClockTime, duration: gst::ClockTime, repeat: usize| {
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let mut s = dash_mpd::S {
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t: Some(start.mseconds() as i64),
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d: duration.mseconds() as i64,
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..Default::default()
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};
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if repeat > 0 {
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s.r = Some(repeat as i64);
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}
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segments.push(s);
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};
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let mut start = None;
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let mut num_segments = 0;
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@ -203,26 +203,61 @@ fn main() -> Result<(), Error> {
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write_segment(start.unwrap(), last_duration.unwrap(), num_segments - 1);
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}
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let manifest = format!(r###"<?xml version="1.0" encoding="UTF-8"?>
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<MPD
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="urn:mpeg:dash:schema:mpd:2011"
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xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd"
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type="static"
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mediaPresentationDuration="PT{duration:.3}S"
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profiles="urn:mpeg:dash:profile:isoff-on-demand:2011">
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<Period>
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<AdaptationSet mimeType="video/mp4" codecs="avc1.4d0228" frameRate="30/1" segmentAlignment="true" startWithSAP="1">
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<Representation id="A" bandwidth="2048000" with="1280" height="720">
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<SegmentTemplate timescale="1000" initialization="init.cmfi" media="segment_$Number$.cmfv">
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<SegmentTimeline>
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{segment_timeline} </SegmentTimeline>
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</SegmentTemplate>
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</Representation>
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</AdaptationSet>
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</Period>
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</MPD>
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"###);
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let segment_template = dash_mpd::SegmentTemplate {
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timescale: Some(1000),
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initialization: Some("init.cmfi".to_string()),
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media: Some("segment_$Number$.cmfv".to_string()),
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SegmentTimeline: Some(dash_mpd::SegmentTimeline { segments }),
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..Default::default()
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};
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let rep = dash_mpd::Representation {
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id: Some("A".to_string()),
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width: Some(1280),
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height: Some(720),
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bandwidth: Some(2048000),
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SegmentTemplate: Some(segment_template),
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..Default::default()
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};
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let adapt = dash_mpd::AdaptationSet {
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contentType: Some("video".to_string()),
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mimeType: Some("video/mp4".to_string()),
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codecs: Some("avc1.4d0228".to_string()),
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frameRate: Some("30/1".to_string()),
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segmentAlignment: Some(true),
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subsegmentStartsWithSAP: Some(1),
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representations: vec![rep],
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..Default::default()
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};
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let period = dash_mpd::Period {
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adaptations: vec![adapt],
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..Default::default()
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};
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let mpd = dash_mpd::MPD {
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mpdtype: Some("static".to_string()),
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xmlns: Some("urn:mpeg:dash:schema:mpd:2011".to_string()),
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schemaLocation: Some("urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd".to_string()),
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profiles: Some("urn:mpeg:dash:profile:isoff-on-demand:2011".to_string()),
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periods: vec![period],
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mediaPresentationDuration: Some(std::time::Duration::from_millis(duration)),
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..Default::default()
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};
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use serde::ser::Serialize;
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let mut xml = String::new();
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let mut ser = quick_xml::se::Serializer::new(&mut xml);
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ser.indent(' ', 4);
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mpd.serialize(ser).unwrap();
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let manifest = format!(
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r###"<?xml version="1.0" encoding="UTF-8"?>
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{xml}
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"###
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);
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std::fs::write(path, manifest).expect("failed to write manifest");
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})
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