WIP: ffmpeg example (#19)

Unfortunately, the images don't look right! I don't know yet what's
wrong.

.github/workflows/ci.yml

@@ -35,6 +35,8 @@ jobs:
         toolchain: ${{ matrix.rust }}
         override: true
         components: ${{ matrix.extra_components }}
+    - name: Install dependencies
+      run: sudo apt-get update && sudo apt-get install libavcodec-dev libavformat-dev libavutil-dev libswscale-dev pkgconf
     - name: Build
       run: cargo build --all-features --all-targets --workspace
     - name: Test

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = [".", "examples/client", "examples/webrtc-proxy"]
+members = [".", "examples/client", "examples/ffmpeg-decode", "examples/webrtc-proxy"]
 default-members = ["."]
 
 [package]

examples/ffmpeg-decode/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "ffmpeg-decode"
+version = "0.0.0"
+edition = "2021"
+publish = false
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.41"
+ffmpeg-next = { version = "5.0.3", default-features=false, features = ["codec", "format", "software-scaling"] }
+futures = "0.3.14"
+log = "0.4.8"
+mylog = { git = "https://github.com/scottlamb/mylog" }
+retina = { path = "../../" }
+structopt = "0.3.21"
+tokio = { version = "1.5.0", features = ["macros", "rt-multi-thread", "signal"] }
+url = "2.2.1"