diff --git a/libraries/effect/src/main/java/androidx/media3/effect/GlTextureProcessor.java b/libraries/effect/src/main/java/androidx/media3/effect/GlTextureProcessor.java
index 9f418f9e78..c2e3f5b722 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/GlTextureProcessor.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/GlTextureProcessor.java
@@ -62,6 +62,9 @@ public interface GlTextureProcessor {
     /**
      * Called when the {@link GlTextureProcessor} has processed an input frame.
      *
+     * <p>The implementation shall not assume the {@link GlTextureProcessor} is {@linkplain
+     * #onReadyToAcceptInputFrame ready to accept another input frame} when this method is called.
+     *
      * @param inputTexture The {@link TextureInfo} that was used to {@linkplain
      *     #queueInputFrame(TextureInfo, long) queue} the input frame.
      */