From 4bf566a8ace0ddae67a4b688af8c9f2aa2775edb Mon Sep 17 00:00:00 2001
From: Martin Algesten <martin@algesten.se>
Date: Thu, 4 Apr 2024 11:01:05 +0200
Subject: [PATCH] Good error message on too big resolution.

---
 openh264/src/encoder.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/openh264/src/encoder.rs b/openh264/src/encoder.rs
index d43b3a1..1daff6f 100644
--- a/openh264/src/encoder.rs
+++ b/openh264/src/encoder.rs
@@ -333,6 +333,16 @@ impl Encoder {
     }
 
     fn reinit(&mut self, width: i32, height: i32) -> Result<(), Error> {
+        // https://github.com/cisco/openh264/blob/master/README.md
+        // > Encoder errors when resolution exceeds 3840x2160
+        //
+        // Some more detail here:
+        // https://github.com/cisco/openh264/issues/3553
+        // > Currently the encoder/decoder could only support up to level 5.2,
+        if width > 3840 || height > 2160 {
+            return Err(Error::msg("Encoder max resolution 3840x2160"));
+        }
+
         let mut params = SEncParamExt::default();
 
         unsafe { self.raw_api.get_default_params(&mut params).ok()? };