Log non-compliant animated stickers

src/main/java/com/github/stickerifier/stickerify/media/MediaHelper.java

@@ -133,7 +133,12 @@ private static boolean isAnimatedStickerCompliant(File file, String mimeType) th
 			try {
 				var sticker = GSON.fromJson(uncompressedContent, AnimationDetails.class);
 
-				return isAnimationCompliant(sticker) && isFileSizeLowerThan(file, MAX_ANIMATION_FILE_SIZE);
+				boolean isAnimationCompliant = isAnimationCompliant(sticker);
+				if (isAnimationCompliant) {
+					return isFileSizeLowerThan(file, MAX_ANIMATION_FILE_SIZE);
+				}
+
+				LOGGER.atWarn().log("The {} doesn't meet Telegram's requirements", sticker);
 			} catch (JsonSyntaxException _) {
 				LOGGER.atInfo().log("The archive isn't an animated sticker");
 			}
@@ -146,6 +151,16 @@ private record AnimationDetails(@SerializedName("w") int width, @SerializedName(
 		private float duration() {
 			return (end - start) / frameRate;
 		}
+
+		@Override
+		public String toString() {
+			return "animated sticker [" +
+					"width=" + width +
+					", height=" + height +
+					", frameRate=" + frameRate +
+					", duration=" + duration() +
+					']';
+		}
 	}
 
 	/**

src/test/java/com/github/stickerifier/stickerify/media/MediaHelperTest.java

@@ -239,6 +239,13 @@ void noLowFpsAnimatedStickerConversionNeeded() throws Exception {
 		assertThat(result, is(nullValue()));
 	}
 
+	@Test
+	void nonCompliantAnimatedSticker() {
+		var animatedSticker = loadResource("non_compliant_animated_sticker.tgs");
+
+		assertThrows(MediaException.class, () -> MediaHelper.convert(animatedSticker));
+	}
+
 	@Test
 	void unsupportedGzipArchive() {
 		var archive = loadResource("unsupported_archive.gz");