Refactor the code into a binary and library (#1)
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Reviewed-on: #1
Co-authored-by: Dominic <git@msrd0.de>
Co-committed-by: Dominic <git@msrd0.de>
This commit is contained in:
Dominic 2024-06-23 15:53:45 +00:00 committed by msrd0.dev - Forgejo
parent 13c03559d0
commit 680ea8f4e5
Signed by: msrd0.dev - Forgejo
GPG key ID: E2F16281CAA26E5F
9 changed files with 297 additions and 220 deletions

54
src/cli.rs Normal file
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@ -0,0 +1,54 @@
//! This module contains helper functions for implementing CLI/TUI.
use crate::time::{parse_time, Time};
use console::style;
use std::{
fmt::Display,
io::{self, BufRead as _, Write as _}
};
pub fn ask(question: impl Display) -> String {
let mut stdout = io::stdout().lock();
let mut stdin = io::stdin().lock();
write!(
stdout,
"{} {} ",
style(question).bold().magenta(),
style(">").cyan()
)
.unwrap();
stdout.flush().unwrap();
let mut line = String::new();
stdin.read_line(&mut line).unwrap();
line.trim().to_owned()
}
pub fn ask_time(question: impl Display + Copy) -> Time {
let mut stdout = io::stdout().lock();
let mut stdin = io::stdin().lock();
let mut line = String::new();
loop {
line.clear();
write!(
stdout,
"{} {} ",
style(question).bold().magenta(),
style(">").cyan()
)
.unwrap();
stdout.flush().unwrap();
stdin.read_line(&mut line).unwrap();
let line = line.trim();
match parse_time(line) {
Ok(time) => return time,
Err(err) => writeln!(
stdout,
"{} {line:?}: {err}",
style("Invalid Input").bold().red()
)
.unwrap()
}
}
}

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@ -1,6 +1,9 @@
//! A module for writing intros and outros
use crate::{time::Date, ProjectLecture, Resolution};
use crate::{
project::{ProjectLecture, Resolution},
time::Date
};
use anyhow::anyhow;
use std::{
fmt::{self, Debug, Display, Formatter},
@ -188,8 +191,8 @@ impl Iotro {
fn finish(self) -> Graphic {
let mut svg = Graphic::new();
svg.set_width(self.res.width());
svg.set_height(self.res.height());
svg.set_width(self.res.width);
svg.set_height(self.res.height);
svg.set_view_box("0 0 1920 1080");
svg.push(
Rect::new()

17
src/lib.rs Normal file
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@ -0,0 +1,17 @@
#![allow(clippy::manual_range_contains)]
#![warn(clippy::unreadable_literal, rust_2018_idioms)]
#![forbid(elided_lifetimes_in_paths, unsafe_code)]
pub mod cli;
pub mod iotro;
pub mod preset;
pub mod project;
pub mod question;
pub mod render;
pub mod time;
#[cfg(feature = "mem_limit")]
use std::sync::RwLock;
#[cfg(feature = "mem_limit")]
pub static MEM_LIMIT: RwLock<String> = RwLock::new(String::new());

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@ -2,32 +2,17 @@
#![warn(clippy::unreadable_literal, rust_2018_idioms)]
#![forbid(elided_lifetimes_in_paths, unsafe_code)]
mod iotro;
mod preset;
mod project;
mod question;
mod render;
mod time;
use self::{
project::{Project, ProjectLecture, ProjectSource, Resolution},
render::Renderer,
time::{parse_date, parse_time, Time}
};
use crate::preset::Preset;
use camino::Utf8PathBuf as PathBuf;
use clap::Parser;
use console::style;
#[cfg(feature = "mem_limit")]
use std::sync::RwLock;
use std::{
fmt::Display,
fs,
io::{self, BufRead as _, Write}
use render_video::{
cli::{ask, ask_time},
preset::Preset,
project::{Project, ProjectLecture, ProjectSource, Resolution},
render::Renderer,
time::parse_date
};
#[cfg(feature = "mem_limit")]
static MEM_LIMIT: RwLock<String> = RwLock::new(String::new());
use std::fs;
#[derive(Debug, Parser)]
struct Args {
@ -60,58 +45,12 @@ struct Args {
stereo: bool
}
fn ask(question: impl Display) -> String {
let mut stdout = io::stdout().lock();
let mut stdin = io::stdin().lock();
write!(
stdout,
"{} {} ",
style(question).bold().magenta(),
style(">").cyan()
)
.unwrap();
stdout.flush().unwrap();
let mut line = String::new();
stdin.read_line(&mut line).unwrap();
line.trim().to_owned()
}
fn ask_time(question: impl Display + Copy) -> Time {
let mut stdout = io::stdout().lock();
let mut stdin = io::stdin().lock();
let mut line = String::new();
loop {
line.clear();
write!(
stdout,
"{} {} ",
style(question).bold().magenta(),
style(">").cyan()
)
.unwrap();
stdout.flush().unwrap();
stdin.read_line(&mut line).unwrap();
let line = line.trim();
match parse_time(line) {
Ok(time) => return time,
Err(err) => writeln!(
stdout,
"{} {line:?}: {err}",
style("Invalid Input").bold().red()
)
.unwrap()
}
}
}
fn main() {
let args = Args::parse();
#[cfg(feature = "mem_limit")]
{
*(MEM_LIMIT.write().unwrap()) = args.mem_limit;
*(render_video::MEM_LIMIT.write().unwrap()) = args.mem_limit;
}
// process arguments
@ -276,7 +215,7 @@ fn main() {
// rescale the video
if let Some(lowest_res) = args.transcode.or(preset.transcode) {
for res in Resolution::values().into_iter().rev() {
for res in Resolution::STANDARD_RESOLUTIONS.into_iter().rev() {
if res > project.source.metadata.as_ref().unwrap().source_res
|| res > args.transcode_start.unwrap_or(preset.transcode_start)
|| res < lowest_res

View file

@ -11,57 +11,59 @@ use std::{fs, io};
#[serde_as]
#[derive(Deserialize, Serialize)]
pub(crate) struct Preset {
pub struct Preset {
// options for the intro slide
pub(crate) course: String,
pub(crate) label: String,
pub(crate) docent: String,
pub course: String,
pub label: String,
pub docent: String,
/// Course language
#[serde(default = "Default::default")]
#[serde(default)]
#[serde_as(as = "DisplayFromStr")]
pub(crate) lang: Language<'static>,
pub lang: Language<'static>,
// coding options
pub(crate) transcode_start: Resolution,
pub(crate) transcode: Option<Resolution>
#[serde_as(as = "DisplayFromStr")]
pub transcode_start: Resolution,
#[serde_as(as = "Option<DisplayFromStr>")]
pub transcode: Option<Resolution>
}
fn preset_23ws_malo2() -> Preset {
pub fn preset_23ws_malo2() -> Preset {
Preset {
course: "23ws-malo2".into(),
label: "Mathematische Logik II".into(),
docent: "Prof. E. Grädel".into(),
lang: GERMAN,
transcode_start: Resolution::WQHD,
transcode: Some(Resolution::nHD)
transcode_start: "1440p".parse().unwrap(),
transcode: Some("360p".parse().unwrap())
}
}
fn preset_24ss_algomod() -> Preset {
pub fn preset_24ss_algomod() -> Preset {
Preset {
course: "24ss-algomod".into(),
label: "Algorithmische Modelltheorie".into(),
docent: "Prof. E. Grädel".into(),
lang: GERMAN,
transcode_start: Resolution::WQHD,
transcode: Some(Resolution::HD)
transcode_start: "1440p".parse().unwrap(),
transcode: Some("720p".parse().unwrap())
}
}
fn preset_24ss_qc() -> Preset {
pub fn preset_24ss_qc() -> Preset {
Preset {
course: "24ss-qc".into(),
label: "Introduction to Quantum Computing".into(),
docent: "Prof. D. Unruh".into(),
lang: BRITISH,
transcode_start: Resolution::WQHD,
transcode: Some(Resolution::HD)
transcode_start: "1440p".parse().unwrap(),
transcode: Some("720p".parse().unwrap())
}
}
impl Preset {
pub(crate) fn find(name: &str) -> anyhow::Result<Self> {
pub fn find(name: &str) -> anyhow::Result<Self> {
match fs::read(name) {
Ok(buf) => return Ok(toml::from_slice(&buf)?),
Err(err) if err.kind() == io::ErrorKind::NotFound => {},

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@ -8,157 +8,226 @@ use crate::{
use rational::Rational;
use serde::{Deserialize, Serialize};
use serde_with::{serde_as, DisplayFromStr};
use std::{collections::BTreeSet, str::FromStr};
use std::{
cmp,
collections::BTreeSet,
fmt::{self, Display, Formatter},
str::FromStr
};
macro_rules! resolutions {
($($res:ident: $width:literal x $height:literal at $bitrate:literal in $format:ident),+) => {
#[allow(non_camel_case_types, clippy::upper_case_acronyms)]
#[derive(Clone, Copy, Debug, Deserialize, Eq, Ord, PartialEq, PartialOrd, Serialize)]
pub(crate) enum Resolution {
$(
#[doc = concat!(stringify!($width), "x", stringify!($height))]
$res
),+
#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
pub struct Resolution {
pub width: u32,
pub height: u32
}
impl Resolution {
pub(crate) fn bitrate(self) -> u64 {
// 640 * 360: 500k
if self.width <= 640 {
500_000
}
const NUM_RESOLUTIONS: usize = {
let mut num = 0;
$(num += 1; stringify!($res);)+
num
};
impl Resolution {
pub(crate) fn values() -> [Self; NUM_RESOLUTIONS] {
[$(Self::$res),+]
}
pub(crate) fn width(self) -> usize {
match self {
$(Self::$res => $width),+
}
}
pub(crate) fn height(self) -> usize {
match self {
$(Self::$res => $height),+
}
}
pub(crate) fn bitrate(self) -> u64 {
match self {
$(Self::$res => $bitrate),+
}
}
pub(crate) fn format(self) -> FfmpegOutputFormat {
match self {
$(Self::$res => FfmpegOutputFormat::$format),+
}
}
// 1280 * 720: 1M
else if self.width <= 1280 {
1_000_000
}
impl FromStr for Resolution {
type Err = anyhow::Error;
fn from_str(s: &str) -> anyhow::Result<Self> {
Ok(match s {
$(concat!(stringify!($height), "p") => Self::$res,)+
_ => anyhow::bail!("Unknown Resolution: {s:?}")
})
}
// 1920 * 1080: 2M
else if self.width <= 1920 {
2_000_000
}
// 2560 * 1440: 3M
else if self.width <= 2560 {
3_000_000
}
// 3840 * 2160: 4M
// TODO die bitrate von 4M ist absolut an den haaren herbeigezogen
else if self.width <= 3840 {
4_000_000
}
// we'll cap everything else at 5M for no apparent reason
else {
5_000_000
}
}
pub(crate) fn default_codec(self) -> FfmpegOutputFormat {
if self.width <= 1920 {
FfmpegOutputFormat::Av1Opus
} else {
FfmpegOutputFormat::AvcAac
}
}
pub const STANDARD_RESOLUTIONS: [Self; 5] = [
Self {
width: 640,
height: 360
},
Self {
width: 1280,
height: 720
},
Self {
width: 1920,
height: 1080
},
Self {
width: 2560,
height: 1440
},
Self {
width: 3840,
height: 2160
}
];
}
impl Display for Resolution {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "{}p", self.height)
}
}
resolutions! {
nHD: 640 x 360 at 500_000 in AvcAac,
HD: 1280 x 720 at 1_000_000 in AvcAac,
FullHD: 1920 x 1080 at 750_000 in Av1Opus,
WQHD: 2560 x 1440 at 1_000_000 in Av1Opus,
// TODO qsx muss mal sagen wieviel bitrate für 4k
UHD: 3840 x 2160 at 2_000_000 in Av1Opus
impl FromStr for Resolution {
type Err = anyhow::Error;
fn from_str(s: &str) -> anyhow::Result<Self> {
Ok(match s.to_lowercase().as_str() {
"360p" | "nhd" => Self {
width: 640,
height: 360
},
"540p" | "qhd" => Self {
width: 960,
height: 540
},
"720p" | "hd" => Self {
width: 1280,
height: 720
},
"900p" | "hd+" => Self {
width: 1600,
height: 900
},
"1080p" | "fhd" | "fullhd" => Self {
width: 1920,
height: 1080
},
"1440p" | "wqhd" => Self {
width: 2560,
height: 1440
},
"2160p" | "4k" | "uhd" => Self {
width: 3840,
height: 2160
},
_ => anyhow::bail!("Unknown Resolution: {s:?}")
})
}
}
impl Ord for Resolution {
fn cmp(&self, other: &Self) -> cmp::Ordering {
(self.width * self.height).cmp(&(other.width * other.height))
}
}
impl Eq for Resolution {}
impl PartialOrd for Resolution {
fn partial_cmp(&self, other: &Self) -> Option<cmp::Ordering> {
Some(self.cmp(other))
}
}
impl PartialEq for Resolution {
fn eq(&self, other: &Self) -> bool {
self.cmp(other) == cmp::Ordering::Equal
}
}
#[derive(Deserialize, Serialize)]
pub(crate) struct Project {
pub(crate) lecture: ProjectLecture,
pub(crate) source: ProjectSource,
pub(crate) progress: ProjectProgress
pub struct Project {
pub lecture: ProjectLecture,
pub source: ProjectSource,
pub progress: ProjectProgress
}
#[serde_as]
#[derive(Deserialize, Serialize)]
pub(crate) struct ProjectLecture {
pub(crate) course: String,
pub(crate) label: String,
pub(crate) docent: String,
pub struct ProjectLecture {
pub course: String,
pub label: String,
pub docent: String,
#[serde_as(as = "DisplayFromStr")]
pub(crate) date: Date,
pub date: Date,
#[serde(default = "Default::default")]
#[serde_as(as = "DisplayFromStr")]
pub(crate) lang: Language<'static>
pub lang: Language<'static>
}
#[serde_as]
#[derive(Deserialize, Serialize)]
pub(crate) struct ProjectSource {
pub(crate) files: Vec<String>,
pub(crate) stereo: bool,
pub struct ProjectSource {
pub files: Vec<String>,
pub stereo: bool,
#[serde_as(as = "Option<DisplayFromStr>")]
pub(crate) start: Option<Time>,
pub start: Option<Time>,
#[serde_as(as = "Option<DisplayFromStr>")]
pub(crate) end: Option<Time>,
pub end: Option<Time>,
#[serde(default)]
#[serde_as(as = "Vec<(DisplayFromStr, DisplayFromStr)>")]
pub(crate) fast: Vec<(Time, Time)>,
pub fast: Vec<(Time, Time)>,
#[serde(default)]
#[serde_as(as = "Vec<(DisplayFromStr, DisplayFromStr, _)>")]
pub(crate) questions: Vec<(Time, Time, String)>,
pub questions: Vec<(Time, Time, String)>,
pub(crate) metadata: Option<ProjectSourceMetadata>
pub metadata: Option<ProjectSourceMetadata>
}
#[serde_as]
#[derive(Deserialize, Serialize)]
pub(crate) struct ProjectSourceMetadata {
pub struct ProjectSourceMetadata {
/// The duration of the source video.
#[serde_as(as = "DisplayFromStr")]
pub(crate) source_duration: Time,
pub source_duration: Time,
/// The FPS of the source video.
#[serde_as(as = "DisplayFromStr")]
pub(crate) source_fps: Rational,
pub source_fps: Rational,
/// The time base of the source video.
#[serde_as(as = "DisplayFromStr")]
pub(crate) source_tbn: Rational,
pub source_tbn: Rational,
/// The resolution of the source video.
pub(crate) source_res: Resolution,
pub source_res: Resolution,
/// The sample rate of the source audio.
pub(crate) source_sample_rate: u32
pub source_sample_rate: u32
}
#[serde_as]
#[derive(Default, Deserialize, Serialize)]
pub(crate) struct ProjectProgress {
pub struct ProjectProgress {
#[serde(default)]
pub(crate) preprocessed: bool,
pub preprocessed: bool,
#[serde(default)]
pub(crate) asked_start_end: bool,
pub asked_start_end: bool,
#[serde(default)]
pub(crate) asked_fast: bool,
pub asked_fast: bool,
#[serde(default)]
pub(crate) asked_questions: bool,
pub asked_questions: bool,
#[serde(default)]
pub(crate) rendered_assets: bool,
pub rendered_assets: bool,
#[serde(default)]
pub(crate) rendered: bool,
pub rendered: bool,
#[serde_as(as = "BTreeSet<DisplayFromStr>")]
#[serde(default)]
pub(crate) transcoded: BTreeSet<Resolution>
pub transcoded: BTreeSet<Resolution>
}

View file

@ -1,4 +1,4 @@
use crate::{iotro::Language, Resolution};
use crate::{iotro::Language, project::Resolution};
use fontconfig::Fontconfig;
use harfbuzz_rs::{Face, Font, Owned, UnicodeBuffer};
use std::sync::OnceLock;
@ -131,8 +131,8 @@ impl Question {
pub(crate) fn finish(self) -> Graphic {
let mut svg = Graphic::new();
svg.set_width(self.res.width());
svg.set_height(self.res.height());
svg.set_width(self.res.width);
svg.set_height(self.res.height);
svg.set_view_box("0 0 1920 1080");
svg.push(self.g);
svg

View file

@ -1,8 +1,8 @@
use super::{cmd, filter::Filter};
use crate::{
project::Resolution,
render::filter::channel,
time::{format_time, Time},
Resolution
time::{format_time, Time}
};
use anyhow::bail;
use camino::Utf8PathBuf as PathBuf;
@ -347,9 +347,9 @@ impl Ffmpeg {
},
FfmpegFilter::Rescale(res) => {
cmd.arg("-vf").arg(if vaapi {
format!("scale_vaapi=w={}:h={}", res.width(), res.height())
format!("scale_vaapi=w={}:h={}", res.width, res.height)
} else {
format!("scale=w={}:h={}", res.width(), res.height())
format!("scale=w={}:h={}", res.width, res.height)
});
}
}

View file

@ -41,8 +41,8 @@ const QUESTION_FADE_LEN: Time = Time {
};
const FF_MULTIPLIER: usize = 8;
// logo sizes at full hd, will be scaled to source resolution
const FF_LOGO_SIZE: usize = 128;
const LOGO_SIZE: usize = 96;
const FF_LOGO_SIZE: u32 = 128;
const LOGO_SIZE: u32 = 96;
fn cmd() -> Command {
#[cfg(feature = "mem_limit")]
@ -119,7 +119,7 @@ fn ffprobe_audio(query: &str, concat_input: &Path) -> anyhow::Result<String> {
)
}
pub(crate) struct Renderer<'a> {
pub struct Renderer<'a> {
/// The directory with all the sources.
directory: &'a Path,
@ -157,7 +157,7 @@ fn svg2mkv(
ffmpeg.run()
}
fn svg2png(svg: &Path, png: &Path, width: usize, height: usize) -> anyhow::Result<()> {
fn svg2png(svg: &Path, png: &Path, width: u32, height: u32) -> anyhow::Result<()> {
let mut cmd = cmd();
cmd.arg("inkscape")
.arg("-w")
@ -175,7 +175,7 @@ fn svg2png(svg: &Path, png: &Path, width: usize, height: usize) -> anyhow::Resul
}
impl<'a> Renderer<'a> {
pub(crate) fn new(directory: &'a Path, project: &Project) -> anyhow::Result<Self> {
pub fn new(directory: &'a Path, project: &Project) -> anyhow::Result<Self> {
let slug = format!(
"{}-{}",
project.lecture.course,
@ -210,7 +210,7 @@ impl<'a> Renderer<'a> {
})
}
pub(crate) fn recording_mkv(&self) -> PathBuf {
pub fn recording_mkv(&self) -> PathBuf {
self.target.join("recording.mkv")
}
@ -230,7 +230,7 @@ impl<'a> Renderer<'a> {
self.target.join(format!("question{q_idx}.png"))
}
pub(crate) fn preprocess(&self, project: &mut Project) -> anyhow::Result<()> {
pub fn preprocess(&self, project: &mut Project) -> anyhow::Result<()> {
assert!(!project.progress.preprocessed);
let recording_txt = self.target.join("recording.txt");
@ -263,14 +263,7 @@ impl<'a> Renderer<'a> {
let width = ffprobe_video("stream=width", &recording_mkv)?.parse()?;
let height = ffprobe_video("stream=height", &recording_mkv)?.parse()?;
let source_res = match (width, height) {
(3840, 2160) => Resolution::UHD,
(2560, 1440) => Resolution::WQHD,
(1920, 1080) => Resolution::FullHD,
(1280, 720) => Resolution::HD,
(640, 360) => Resolution::nHD,
(width, height) => bail!("Unknown resolution: {width}x{height}")
};
let source_res = Resolution { width, height };
project.source.metadata = Some(ProjectSourceMetadata {
source_duration: ffprobe_video("format=duration", &recording_mkv)?.parse()?,
source_fps: ffprobe_video("stream=r_frame_rate", &recording_mkv)?.parse()?,
@ -283,7 +276,7 @@ impl<'a> Renderer<'a> {
}
/// Prepare assets like intro, outro and questions.
pub(crate) fn render_assets(&self, project: &Project) -> anyhow::Result<()> {
pub fn render_assets(&self, project: &Project) -> anyhow::Result<()> {
let metadata = project.source.metadata.as_ref().unwrap();
println!();
@ -322,7 +315,7 @@ impl<'a> Renderer<'a> {
include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/logo.svg"))
)?;
let logo_png = self.target.join("logo.png");
let logo_size = LOGO_SIZE * metadata.source_res.width() / 1920;
let logo_size = LOGO_SIZE * metadata.source_res.width / 1920;
svg2png(&logo_svg, &logo_png, logo_size, logo_size)?;
// copy fastforward then render to png
@ -335,7 +328,7 @@ impl<'a> Renderer<'a> {
))
)?;
let fastforward_png = self.target.join("fastforward.png");
let ff_logo_size = FF_LOGO_SIZE * metadata.source_res.width() / 1920;
let ff_logo_size = FF_LOGO_SIZE * metadata.source_res.width / 1920;
svg2png(
&fastforward_svg,
&fastforward_png,
@ -355,8 +348,8 @@ impl<'a> Renderer<'a> {
svg2png(
&q_svg,
&q_png,
metadata.source_res.width(),
metadata.source_res.height()
metadata.source_res.width,
metadata.source_res.height
)?;
}
@ -365,21 +358,21 @@ impl<'a> Renderer<'a> {
/// Get the video file for a specific resolution, completely finished.
fn video_file_res(&self, res: Resolution) -> PathBuf {
let extension = match res.format() {
let extension = match res.default_codec() {
FfmpegOutputFormat::Av1Flac => "mkv",
FfmpegOutputFormat::Av1Opus => "webm",
FfmpegOutputFormat::AvcAac => "mp4"
};
self.target
.join(format!("{}-{}p.{extension}", self.slug, res.height()))
.join(format!("{}-{}p.{extension}", self.slug, res.height))
}
/// Get the video file directly outputed to further transcode.
pub(crate) fn video_file_output(&self) -> PathBuf {
pub fn video_file_output(&self) -> PathBuf {
self.target.join(format!("{}.mkv", self.slug))
}
pub(crate) fn render(&self, project: &mut Project) -> anyhow::Result<PathBuf> {
pub fn render(&self, project: &mut Project) -> anyhow::Result<PathBuf> {
let source_res = project.source.metadata.as_ref().unwrap().source_res;
let output = self.video_file_output();
@ -627,8 +620,8 @@ impl<'a> Renderer<'a> {
output: logoalpha.into()
});
let overlay = "overlay";
let overlay_off_x = 130 * source_res.width() / 3840;
let overlay_off_y = 65 * source_res.height() / 2160;
let overlay_off_x = 130 * source_res.width / 3840;
let overlay_off_y = 65 * source_res.height / 2160;
ffmpeg.add_filter(Filter::Overlay {
video_input: concat.into(),
overlay_input: logoalpha.into(),
@ -657,7 +650,7 @@ impl<'a> Renderer<'a> {
println!(
" {} {}",
style("==>").bold().cyan(),
style(format!("Rescaling to {}p", res.height())).bold()
style(format!("Rescaling to {}p", res.height)).bold()
);
let mut ffmpeg = Ffmpeg::new(FfmpegOutput {
@ -675,7 +668,7 @@ impl<'a> Renderer<'a> {
comment: Some(lecture.lang.video_created_by_us.into()),
language: Some(lecture.lang.lang.into()),
..FfmpegOutput::new(res.format(), output.clone()).enable_faststart()
..FfmpegOutput::new(res.default_codec(), output.clone()).enable_faststart()
});
ffmpeg.add_input(FfmpegInput::new(input));
ffmpeg.rescale_video(res);