3 files changed, 26 insertions, 7 deletions
diff --git a/transcoder/Cargo.toml b/transcoder/Cargo.toml
index ac6fe24..e39b07c 100644
--- a/transcoder/Cargo.toml
+++ b/transcoder/Cargo.toml
@@ -6,8 +6,10 @@ edition = "2021"
 [dependencies]
 jellycommon = { path = "../common" }
 jellybase = { path = "../base" }
-log = "0.4.20"
-image = { git = "https://github.com/image-rs/image", features = ["avif-decoder"] }
+log = { workspace = true }
+image = { git = "https://github.com/image-rs/image", features = [
+    "avif-decoder",
+] }
 anyhow = "1.0.75"
 rgb = "0.8.36"
 rav1e = { version = "0.6.6", default-features = false, features = [
diff --git a/transcoder/src/bin/reproduce_decode_error.rs b/transcoder/src/bin/reproduce_decode_error.rs
new file mode 100644
index 0000000..84fa6fd
--- /dev/null
+++ b/transcoder/src/bin/reproduce_decode_error.rs
@@ -0,0 +1,11 @@
+use jellytranscoder::image::transcode;
+
+fn main() {
+    transcode(
+        jellycommon::AssetLocation::Cache(std::env::args().nth(2).unwrap().into()),
+        1.0,
+        1,
+        1,
+    )
+    .unwrap();
+}
diff --git a/transcoder/src/image.rs b/transcoder/src/image.rs
index c28ef2b..6da1be7 100644
--- a/transcoder/src/image.rs
+++ b/transcoder/src/image.rs
@@ -1,6 +1,8 @@
+use anyhow::Context;
+use image::{imageops::FilterType, ImageFormat};
 use jellybase::{cache_file, AssetLocationExt};
 use jellycommon::AssetLocation;
-use log::info;
+use log::{debug, info};
 use rgb::FromSlice;
 use std::{
     fs::File,
@@ -22,14 +24,18 @@ pub fn transcode(
     .path();
     if !path.exists() {
         info!("encoding {path:?} (speed={speed}, quality={quality}, width={width})");
-        let reader = image::io::Reader::new(BufReader::new(File::open(original_path)?))
-            .with_guessed_format()?;
-        let original = reader.decode()?.to_rgba8();
+        // TODO shouldn't be neccessary with guessed format.
+        let file = BufReader::new(File::open(&original_path).context("opening source")?);
+        let mut reader = image::io::Reader::new(file);
+        reader.set_format(ImageFormat::Avif);
+        let reader = reader.with_guessed_format().context("guessing format")?;
+        debug!("guessed format (or fallback): {:?}", reader.format());
+        let original = reader.decode().context("decoding image")?.to_rgba8();
         let image = image::imageops::resize(
             &original,
             width as u32,
             width as u32 * original.height() / original.width(),
-            image::imageops::FilterType::Lanczos3,
+            FilterType::Lanczos3,
         );
         let pixels = image.to_vec();
         let encoded = ravif::Encoder::new()