rusttechx: Various changes
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7 changed files with 635 additions and 3218 deletions
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.gitignore
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*/plots/*
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rusttechx-2024/ogg-demux-pipeline.svg
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rusttechx-2024/ogg-demux-pipeline.svg
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After Width: | Height: | Size: 46 KiB |
File diff suppressed because it is too large
Load diff
|
Before Width: | Height: | Size: 298 KiB |
Binary file not shown.
|
Before Width: | Height: | Size: 120 KiB |
Binary file not shown.
|
|
@ -48,34 +48,53 @@ gst-launch-1.0 videotestsrc ! autovideosink
|
|||
gst-launch-1.0 audiotestsrc ! autoaudiosink
|
||||
```
|
||||
|
||||
## Media pipeline[^1]
|
||||
## **gst-inspect**
|
||||
|
||||
```bash
|
||||
Factory Details:
|
||||
Rank none (0)
|
||||
Long-name Video test source
|
||||
Klass Source/Video
|
||||
Description Creates a test video stream
|
||||
Author David A. Schleef <ds@schleef.org>
|
||||
Documentation https://gstreamer.freedesktop.org/documentation/videotestsrc/#videotestsrc-page
|
||||
|
||||
Plugin Details:
|
||||
Name videotestsrc
|
||||
Description Creates a test video stream
|
||||
Filename /usr/lib/gstreamer-1.0/libgstvideotestsrc.so
|
||||
Version 1.24.9
|
||||
License LGPL
|
||||
Source module gst-plugins-base
|
||||
Documentation https://gstreamer.freedesktop.org/documentation/videotestsrc/
|
||||
Source release date 2024-10-30
|
||||
Binary package Arch Linux GStreamer 1.24.9-3
|
||||
Origin URL https://www.archlinux.org/
|
||||
|
||||
GObject
|
||||
+----GInitiallyUnowned
|
||||
+----GstObject
|
||||
+----GstElement
|
||||
+----GstBaseSrc
|
||||
+----GstPushSrc
|
||||
+----GstVideoTestSrc
|
||||
|
||||
Pad Templates:
|
||||
SRC template: 'src'
|
||||
Availability: Always
|
||||
Capabilities:
|
||||
video/x-raw
|
||||
```
|
||||
|
||||
## Media pipeline
|
||||
|
||||
{width=80%}
|
||||
|
||||
[^1]: [Dynamic Pipelines](https://gstreamer.freedesktop.org/documentation/tutorials/basic/dynamic-pipelines.html?gi-language=c)
|
||||
|
||||
## Playback pipeline
|
||||
|
||||
```bash
|
||||
gst-play-1.0 https://devstreaming-cdn.apple.com/videos/streaming/examples/img_bipbop_adv_example_ts/master.m3u8
|
||||
```
|
||||
|
||||
## Playback pipeline graph
|
||||
|
||||
|
||||
|
||||
## Custom elements
|
||||
|
||||
{width=58%}
|
||||
|
||||
```bash
|
||||
gst-launch-1.0 filesrc location=bunny.mp4 ! decodebin ! videoconvert ! roundedcorners border-radius-px=100 ! videoconvert ! gtksink
|
||||
```
|
||||
|
||||
## Why Rust?
|
||||
|
||||
- Codec implementations in pure Rust (Rust Audio, Xiph AV1, Symphonia)
|
||||
- Things we care about
|
||||
- Things to care about
|
||||
* **Low cognitive overhead**
|
||||
* Immutability
|
||||
* Expressive type system
|
||||
|
|
@ -84,7 +103,7 @@ gst-launch-1.0 filesrc location=bunny.mp4 ! decodebin ! videoconvert ! roundedco
|
|||
|
||||
## Why Rust?
|
||||
|
||||
- Bindings/abstractions over GLib/GObject and for GStreamer[^2]
|
||||
- Bindings/abstractions over GLib/GObject and for GStreamer[^1]
|
||||
- Provides a root for the object hierarchy tree filed in by the GStreamer library
|
||||
- Gives basic reference counting, parenting functionality and locking.
|
||||
- GObject
|
||||
|
|
@ -99,7 +118,7 @@ gst-launch-1.0 filesrc location=bunny.mp4 ! decodebin ! videoconvert ! roundedco
|
|||
- GstElement
|
||||
- GstPad
|
||||
|
||||
[^2]: [GstObject](https://gstreamer.freedesktop.org/documentation/gstreamer/gstobject.html?gi-language=c)
|
||||
[^1]: [GstObject](https://gstreamer.freedesktop.org/documentation/gstreamer/gstobject.html?gi-language=c)
|
||||
|
||||
## Why immutability and types matter?
|
||||
|
||||
|
|
@ -210,9 +229,86 @@ For more information about this error, try `rustc --explain E0596`.
|
|||
}
|
||||
```
|
||||
|
||||
## GStreamer & Rust
|
||||
## Code
|
||||
|
||||
- Some stats[^3]
|
||||
```rust
|
||||
let src = gst::ElementFactory::make("filesrc")
|
||||
.property("location", "sample.ogv")
|
||||
.build()
|
||||
.unwrap();
|
||||
let demux = gst::ElementFactory::make("oggdemux").build().unwrap();
|
||||
|
||||
let pipeline_weak = pipeline.downgrade();
|
||||
demux.connect("pad-added", false, move |args| {
|
||||
let pipeline = match pipeline_weak.upgrade() {
|
||||
Some(self_) => self_,
|
||||
None => return None,
|
||||
};
|
||||
|
||||
let pad = args[1]
|
||||
.get::<gst::Pad>()
|
||||
.expect("Second argument to demux pad-added must be pad");
|
||||
```
|
||||
|
||||
## Code
|
||||
|
||||
```rust
|
||||
if let Some(caps) = pad.current_caps() {
|
||||
let s = caps.structure(0).unwrap();
|
||||
|
||||
let (decoder, sink) = if s.name().starts_with("video") {
|
||||
let decoder = gst::ElementFactory::make("theoradec").build().unwrap();
|
||||
let sink = gst::ElementFactory::make("autovideosink").build().unwrap();
|
||||
(decoder, sink)
|
||||
} else {
|
||||
let decoder = gst::ElementFactory::make("vorbisdec").build().unwrap();
|
||||
let sink = gst::ElementFactory::make("autoaudiosink").build().unwrap();
|
||||
(decoder, sink)
|
||||
};
|
||||
|
||||
let queue1 = gst::ElementFactory::make("queue").build().unwrap();
|
||||
let queue2 = gst::ElementFactory::make("queue").build().unwrap();
|
||||
```
|
||||
|
||||
## Code
|
||||
|
||||
```rust
|
||||
pipeline
|
||||
.add_many([&queue1, &decoder, &queue2, &sink])
|
||||
.unwrap();
|
||||
|
||||
let sinkpad = queue1.static_pad("sink").unwrap();
|
||||
pad.link(&sinkpad).unwrap();
|
||||
|
||||
queue1.link(&decoder).unwrap();
|
||||
decoder.link(&queue2).unwrap();
|
||||
queue2.link(&sink).unwrap();
|
||||
|
||||
queue1.sync_state_with_parent().unwrap();
|
||||
decoder.sync_state_with_parent().unwrap();
|
||||
queue2.sync_state_with_parent().unwrap();
|
||||
sink.sync_state_with_parent().unwrap();
|
||||
}
|
||||
```
|
||||
|
||||
## Code
|
||||
|
||||
```rust
|
||||
None
|
||||
});
|
||||
|
||||
pipeline.add_many([&src, &demux]).unwrap();
|
||||
|
||||
src.link(&demux).unwrap();
|
||||
```
|
||||
|
||||
## Media pipeline
|
||||
|
||||
|
||||
|
||||
## Some stats
|
||||
|
||||
- **gstreamer-rs** & **gst-plugins-rs**[^2]
|
||||
- gstreamer-rs: ~2700 commits, gst-plugins-rs: ~2600 commits
|
||||
- gstreamer-rs: ~85 contributors, gst-plugins-rs: ~110 contributors
|
||||
- gst-plugins-rs: ~ +180k SLOC / -37k SLOC
|
||||
|
|
@ -221,22 +317,24 @@ For more information about this error, try `rustc --explain E0596`.
|
|||
- 1.22 cycle: ~33% commits / MRs in Rust modules
|
||||
- 1.24 cycle: ~25% commits / MRs in Rust modules
|
||||
|
||||
[^3]: [GStreamer & Rust: What has happened over the last 5 years](https://gstconf.ubicast.tv/videos/gstreamer-rust-what-has-happened-over-the-last-5-years_f8qxhpuzi9/)
|
||||
[^2]: [GStreamer & Rust: What has happened over the last 5 years](https://gstconf.ubicast.tv/videos/gstreamer-rust-what-has-happened-over-the-last-5-years_f8qxhpuzi9/)
|
||||
|
||||
## Resources
|
||||
|
||||
- [Dynamic Pipelines](https://gstreamer.freedesktop.org/documentation/tutorials/basic/dynamic-pipelines.html?gi-language=c)
|
||||
- [GObject subclassing in Rust ](https://www.youtube.com/watch?v=TSf3rVyv7c8)
|
||||
- [GStreamer bindings for Rust](https://gitlab.freedesktop.org/gstreamer/gstreamer-rs)
|
||||
- [Rust GStreamer Plugins](https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs)
|
||||
- [Using GStreamer](https://www.youtube.com/watch?v=ZphadMGufY8)
|
||||
- [How to get started with GStreamer](https://www.youtube.com/watch?v=OkOsm9FyzdM&t=2s)
|
||||
- [GStreamer for your backend services](https://asymptotic.io/blog/gstreamer-for-your-backend-services/)
|
||||
- [OGG demultiplexing Rust sample code](https://gitlab.freedesktop.org/SanchayanMaity/ogg-demux)
|
||||
|
||||
## Questions?
|
||||
|
||||
- Rust Bangalore
|
||||
* Meetup: https://hasgeek.com/rustbangalore
|
||||
* Telegram: t.me/RustIndia
|
||||
* Meetup: [https://hasgeek.com/rustbangalore](https://hasgeek.com/rustbangalore)
|
||||
* Telegram: [https://t.me/RustIndia](https://t.me/RustIndia)
|
||||
- Reach out on
|
||||
* email:
|
||||
|
||||
|
|
|
|||
|
|
@ -1,7 +1,6 @@
|
|||
#import "@preview/diatypst:0.2.0": *
|
||||
#show: slides.with(
|
||||
title: "Multimedia using Rust & GStreamer",
|
||||
authors: ("Sanchayan Maity"),
|
||||
ratio: 16/9,
|
||||
layout: "large",
|
||||
toc: false,
|
||||
|
|
|
|||
Loading…
Reference in a new issue