fix(back-end): img convert

backend/src/main/java/com/printcalculator/service/admin/AdminMediaControllerService.java

@@ -350,7 +350,27 @@ public class AdminMediaControllerService {
                 }
                 String extension = GENERATED_FORMAT_EXTENSIONS.get(format);
                 Path outputFile = generatedDirectory.resolve(preset.name() + "." + extension);
-                mediaFfmpegService.generateVariant(sourceFile, outputFile, dimensions.widthPx(), dimensions.heightPx(), format);
+                try {
+                    mediaFfmpegService.generateVariant(
+                            sourceFile,
+                            outputFile,
+                            dimensions.widthPx(),
+                            dimensions.heightPx(),
+                            format
+                    );
+                } catch (IOException e) {
+                    if (FORMAT_AVIF.equals(format)) {
+                        skippedFormats.add(format);
+                        logger.warn(
+                                "Skipping AVIF variant generation for asset {} preset '{}' because FFmpeg AVIF generation failed: {}",
+                                asset.getId(),
+                                preset.name(),
+                                e.getMessage()
+                        );
+                        continue;
+                    }
+                    throw e;
+                }
 
                 MediaVariant variant = new MediaVariant();
                 variant.setMediaAsset(asset);

backend/src/main/java/com/printcalculator/service/media/MediaFfmpegService.java

@@ -82,8 +82,6 @@ public class MediaFfmpegService {
             case "AVIF" -> {
                 command.add("-c:v");
                 command.add(encoder);
-                command.add("-still-picture");
-                command.add("1");
                 command.add("-crf");
                 command.add("30");
                 command.add("-b:v");

backend/src/test/java/com/printcalculator/service/admin/AdminMediaControllerServiceTest.java

@@ -51,6 +51,7 @@ import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.verifyNoInteractions;
 import static org.mockito.Mockito.when;
 
@@ -275,6 +276,31 @@ class AdminMediaControllerServiceTest {
                 .noneMatch(variant -> "WEBP".equals(variant.getFormat()) || "AVIF".equals(variant.getFormat())));
     }
 
+    @Test
+    void uploadAsset_whenAvifGenerationFails_shouldKeepAssetReadyAndStoreOtherVariants() throws Exception {
+        when(mediaImageInspector.inspect(any(Path.class))).thenReturn(
+                new MediaImageInspector.ImageMetadata("image/png", "png", 1600, 900)
+        );
+        doThrow(new java.io.IOException("FFmpeg failed to generate media variant. Unrecognized option 'still-picture'."))
+                .when(mediaFfmpegService)
+                .generateVariant(any(Path.class), any(Path.class), anyInt(), anyInt(), org.mockito.ArgumentMatchers.eq("AVIF"));
+
+        MockMultipartFile file = new MockMultipartFile(
+                "file",
+                "landing-hero.png",
+                "image/png",
+                "png-image-content".getBytes(StandardCharsets.UTF_8)
+        );
+
+        AdminMediaAssetDto dto = service.uploadAsset(file, " Landing hero ", " Main headline ", null);
+
+        assertEquals("READY", dto.getStatus());
+        assertEquals(7, dto.getVariants().size());
+        assertTrue(dto.getVariants().stream().noneMatch(variant -> "AVIF".equals(variant.getFormat())));
+        assertEquals(3, dto.getVariants().stream().filter(variant -> "JPEG".equals(variant.getFormat())).count());
+        assertEquals(3, dto.getVariants().stream().filter(variant -> "WEBP".equals(variant.getFormat())).count());
+    }
+
     @Test
     void uploadAsset_withOversizedFile_shouldFailValidationBeforePersistence() {
         service = new AdminMediaControllerService(

backend/src/test/java/com/printcalculator/service/media/MediaFfmpegServiceTest.java

@@ -6,8 +6,11 @@ import org.junit.jupiter.api.io.TempDir;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.attribute.PosixFilePermission;
+import java.util.Set;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class MediaFfmpegServiceTest {
@@ -61,4 +64,57 @@ class MediaFfmpegServiceTest {
 
         assertEquals("Media target file name must not start with '-'.", ex.getMessage());
     }
+
+    @Test
+    void generateVariant_avifShouldNotUseStillPictureFlag() throws Exception {
+        Path fakeFfmpeg = tempDir.resolve("fake-ffmpeg.sh");
+        Files.writeString(
+                fakeFfmpeg,
+                """
+                        #!/bin/sh
+                        if [ "$1" = "-hide_banner" ] && [ "$2" = "-encoders" ]; then
+                          cat <<'EOF'
+                         V..... mjpeg
+                         V..... libwebp
+                         V..... libaom-av1
+                        EOF
+                          exit 0
+                        fi
+
+                        for arg in "$@"; do
+                          if [ "$arg" = "-still-picture" ]; then
+                            echo "Unrecognized option 'still-picture'. Error splitting the argument list: Option not found"
+                            exit 1
+                          fi
+                        done
+
+                        last_arg=""
+                        for arg in "$@"; do
+                          last_arg="$arg"
+                        done
+
+                        mkdir -p "$(dirname "$last_arg")"
+                        printf 'ok' > "$last_arg"
+                        exit 0
+                        """
+        );
+        Files.setPosixFilePermissions(
+                fakeFfmpeg,
+                Set.of(
+                        PosixFilePermission.OWNER_READ,
+                        PosixFilePermission.OWNER_WRITE,
+                        PosixFilePermission.OWNER_EXECUTE
+                )
+        );
+
+        MediaFfmpegService service = new MediaFfmpegService(fakeFfmpeg.toString());
+        Path source = tempDir.resolve("input.png");
+        Path target = tempDir.resolve("output.avif");
+        Files.writeString(source, "image");
+
+        service.generateVariant(source, target, 120, 80, "AVIF");
+
+        assertTrue(Files.exists(target));
+        assertEquals("ok", Files.readString(target));
+    }
 }