More uploads refactoring.

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/Config.java

@@ -1,7 +1,7 @@
 package nl.andrewlalis.gymboardcdn;
 
-import nl.andrewlalis.gymboardcdn.service.FileStorageService;
-import nl.andrewlalis.gymboardcdn.util.ULID;
+import nl.andrewlalis.gymboardcdn.files.FileStorageService;
+import nl.andrewlalis.gymboardcdn.files.util.ULID;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/StatusController.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.api;
+package nl.andrewlalis.gymboardcdn;
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/api/FileUploadResponse.java

@@ -1,5 +0,0 @@
-package nl.andrewlalis.gymboardcdn.api;
-
-public record FileUploadResponse(
-		String id
-) {}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/FileController.java

@@ -1,8 +1,6 @@
-package nl.andrewlalis.gymboardcdn.api;
+package nl.andrewlalis.gymboardcdn.files;
 
 import jakarta.servlet.http.HttpServletResponse;
-import nl.andrewlalis.gymboardcdn.model.FullFileMetadata;
-import nl.andrewlalis.gymboardcdn.service.FileStorageService;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/FileMetadata.java

@@ -0,0 +1,7 @@
+package nl.andrewlalis.gymboardcdn.files;
+
+public record FileMetadata (
+		String filename,
+		String mimeType,
+		boolean accessible
+) {}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/FileMetadataResponse.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.api;
+package nl.andrewlalis.gymboardcdn.files;
 
 public record FileMetadataResponse(
 		String filename,

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/FileStorageService.java

@@ -1,10 +1,8 @@
-package nl.andrewlalis.gymboardcdn.service;
+package nl.andrewlalis.gymboardcdn.files;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.servlet.http.HttpServletResponse;
-import nl.andrewlalis.gymboardcdn.model.FileMetadata;
-import nl.andrewlalis.gymboardcdn.model.FullFileMetadata;
-import nl.andrewlalis.gymboardcdn.util.ULID;
+import nl.andrewlalis.gymboardcdn.files.util.ULID;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.server.ResponseStatusException;
 
@@ -46,6 +44,10 @@ public class FileStorageService {
 		this.baseStorageDir = baseStorageDir;
 	}
 
+	public String generateFileId() {
+		return ulid.nextULID();
+	}
+
 	/**
 	 * Saves a new file to the storage.
 	 * @param in The input stream to the file contents.
@@ -106,8 +108,8 @@ public class FileStorageService {
 			FileMetadata metadata = readMetadata(in);
 			LocalDateTime date = dateFromULID(ULID.parseULID(rawId));
 			return new FullFileMetadata(
-					metadata.filename,
-					metadata.mimeType,
+					metadata.filename(),
+					metadata.mimeType(),
 					Files.size(filePath) - HEADER_SIZE,
 					date.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME)
 			);
@@ -131,7 +133,7 @@ public class FileStorageService {
 
 		try (var in = Files.newInputStream(filePath)) {
 			FileMetadata metadata = readMetadata(in);
-			response.setContentType(metadata.mimeType);
+			response.setContentType(metadata.mimeType());
 			response.setContentLengthLong(Files.size(filePath) - HEADER_SIZE);
 			response.addHeader("Cache-Control", "max-age=604800, immutable");
 			var out = response.getOutputStream();

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/FullFileMetadata.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.model;
+package nl.andrewlalis.gymboardcdn.files;
 
 public record FullFileMetadata(
 		String filename,

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/files/util/ULID.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.util;
+package nl.andrewlalis.gymboardcdn.files.util;
 
 /*
  * sulky-modules - several general-purpose modules.

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/model/FileMetadata.java

@@ -1,6 +0,0 @@
-package nl.andrewlalis.gymboardcdn.model;
-
-public class FileMetadata {
-	public String filename;
-	public String mimeType;
-}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/model/VideoProcessingTask.java

@@ -1,62 +0,0 @@
-package nl.andrewlalis.gymboardcdn.model;
-
-import jakarta.persistence.*;
-import org.hibernate.annotations.CreationTimestamp;
-
-import java.time.LocalDateTime;
-
-/**
- * An entity to keep track of a task for processing a raw video into a better
- * format for Gymboard to serve.
- */
-@Entity
-@Table(name = "task_video_processing")
-public class VideoProcessingTask {
-	public enum Status {
-		WAITING,
-		IN_PROGRESS,
-		COMPLETED,
-		FAILED
-	}
-
-	@Id
-	@GeneratedValue(strategy = GenerationType.IDENTITY)
-	private Long id;
-
-	@CreationTimestamp
-	private LocalDateTime createdAt;
-
-	@Enumerated(EnumType.STRING)
-	@Column(nullable = false)
-	private Status status;
-
-	@Column(nullable = false, updatable = false, length = 26)
-	private String rawUploadFileId;
-
-	public VideoProcessingTask() {}
-
-	public VideoProcessingTask(Status status, String rawUploadFileId) {
-		this.status = status;
-		this.rawUploadFileId = rawUploadFileId;
-	}
-
-	public Long getId() {
-		return id;
-	}
-
-	public LocalDateTime getCreatedAt() {
-		return createdAt;
-	}
-
-	public Status getStatus() {
-		return status;
-	}
-
-	public void setStatus(Status status) {
-		this.status = status;
-	}
-
-	public String getRawUploadFileId() {
-		return rawUploadFileId;
-	}
-}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/api/UploadController.java

@@ -1,7 +1,7 @@
-package nl.andrewlalis.gymboardcdn.api;
+package nl.andrewlalis.gymboardcdn.uploads.api;
 
 import jakarta.servlet.http.HttpServletRequest;
-import nl.andrewlalis.gymboardcdn.service.UploadService;
+import nl.andrewlalis.gymboardcdn.uploads.service.UploadService;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -16,12 +16,17 @@ public class UploadController {
 	}
 
 	@PostMapping(path = "/uploads/video", consumes = {"video/mp4"})
-	public FileUploadResponse uploadVideo(HttpServletRequest request) {
+	public VideoUploadResponse uploadVideo(HttpServletRequest request) {
 		return uploadService.processableVideoUpload(request);
 	}
 
-	@GetMapping(path = "/uploads/video/{id}/status")
-	public VideoProcessingTaskStatusResponse getVideoProcessingStatus(@PathVariable String id) {
-		return uploadService.getVideoProcessingStatus(id);
+	@PostMapping(path = "/uploads/video/{taskId}/start")
+	public void startVideoProcessing(@PathVariable long taskId) {
+		uploadService.startVideoProcessing(taskId);
+	}
+
+	@GetMapping(path = "/uploads/video/{taskId}/status")
+	public VideoProcessingTaskStatusResponse getVideoProcessingStatus(@PathVariable long taskId) {
+		return uploadService.getVideoProcessingStatus(taskId);
 	}
 }

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/api/VideoProcessingTaskStatusResponse.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.api;
+package nl.andrewlalis.gymboardcdn.uploads.api;
 
 public record VideoProcessingTaskStatusResponse(
 		String status

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/api/VideoUploadResponse.java

@@ -0,0 +1,5 @@
+package nl.andrewlalis.gymboardcdn.uploads.api;
+
+public record VideoUploadResponse(
+		long taskId
+) {}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/model/VideoProcessingTask.java

@@ -0,0 +1,87 @@
+package nl.andrewlalis.gymboardcdn.uploads.model;
+
+import jakarta.persistence.*;
+import org.hibernate.annotations.CreationTimestamp;
+
+import java.time.LocalDateTime;
+
+/**
+ * An entity to keep track of a task for processing a raw video into a better
+ * format for Gymboard to serve. Generally, tasks are processed like so:
+ * <ol>
+ *     <li>A video is uploaded, and a new task is created with the NOT_STARTED status.</li>
+ *     <li>Once the Gymboard API verifies the associated submission, it'll
+ *     request to start the task, bringing it to the WAITING status.</li>
+ *     <li>When a task executor picks up the waiting task, its status changes to IN_PROGRESS.</li>
+ *     <li>If the video is processed successfully, then the task is COMPLETED, otherwise FAILED.</li>
+ * </ol>
+ */
+@Entity
+@Table(name = "task_video_processing")
+public class VideoProcessingTask {
+	public enum Status {
+		NOT_STARTED,
+		WAITING,
+		IN_PROGRESS,
+		COMPLETED,
+		FAILED
+	}
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long id;
+
+	@CreationTimestamp
+	private LocalDateTime createdAt;
+
+	@Enumerated(EnumType.STRING)
+	@Column(nullable = false)
+	private Status status;
+
+	/**
+	 * The file id for the original, raw user-uploaded video file that needs to
+	 * be processed.
+	 */
+	@Column(nullable = false, updatable = false, length = 26)
+	private String uploadFileId;
+
+	/**
+	 * The file id for the final processed video file. This doesn't exist yet,
+	 * but we generate the video id right away, just in case there's a need to
+	 * preemptively link to it.
+	 */
+	@Column(nullable = false, updatable = false, length = 26)
+	private String videoFileId;
+
+	public VideoProcessingTask() {}
+
+	public VideoProcessingTask(Status status, String uploadFileId, String videoFileId) {
+		this.status = status;
+		this.uploadFileId = uploadFileId;
+		this.videoFileId = videoFileId;
+	}
+
+	public Long getId() {
+		return id;
+	}
+
+	public LocalDateTime getCreatedAt() {
+		return createdAt;
+	}
+
+	public Status getStatus() {
+		return status;
+	}
+
+	public void setStatus(Status status) {
+		this.status = status;
+	}
+
+	public String getUploadFileId() {
+		return uploadFileId;
+	}
+
+	public String getVideoFileId() {
+		return videoFileId;
+	}
+}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/model/VideoProcessingTaskRepository.java

@@ -1,16 +1,13 @@
-package nl.andrewlalis.gymboardcdn.model;
+package nl.andrewlalis.gymboardcdn.uploads.model;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import java.time.LocalDateTime;
 import java.util.List;
-import java.util.Optional;
 
 @Repository
 public interface VideoProcessingTaskRepository extends JpaRepository<VideoProcessingTask, Long> {
-	Optional<VideoProcessingTask> findByVideoIdentifier(String identifier);
-
 	List<VideoProcessingTask> findAllByStatusOrderByCreatedAtDesc(VideoProcessingTask.Status status);
 
 	List<VideoProcessingTask> findAllByCreatedAtBefore(LocalDateTime cutoff);

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/CommandFailedException.java

@@ -1,4 +1,4 @@
-package nl.andrewlalis.gymboardcdn.service;
+package nl.andrewlalis.gymboardcdn.uploads.service;
 
 import java.io.IOException;
 import java.nio.file.Path;

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/UploadService.java

@@ -1,11 +1,12 @@
-package nl.andrewlalis.gymboardcdn.service;
+package nl.andrewlalis.gymboardcdn.uploads.service;
 
 import jakarta.servlet.http.HttpServletRequest;
-import nl.andrewlalis.gymboardcdn.api.FileUploadResponse;
-import nl.andrewlalis.gymboardcdn.api.VideoProcessingTaskStatusResponse;
-import nl.andrewlalis.gymboardcdn.model.FileMetadata;
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTask;
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTaskRepository;
+import nl.andrewlalis.gymboardcdn.uploads.api.VideoUploadResponse;
+import nl.andrewlalis.gymboardcdn.uploads.api.VideoProcessingTaskStatusResponse;
+import nl.andrewlalis.gymboardcdn.files.FileMetadata;
+import nl.andrewlalis.gymboardcdn.files.FileStorageService;
+import nl.andrewlalis.gymboardcdn.uploads.model.VideoProcessingTask;
+import nl.andrewlalis.gymboardcdn.uploads.model.VideoProcessingTaskRepository;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
@@ -33,11 +34,12 @@ public class UploadService {
 	 * Handles uploading of a processable video file that will be processed
 	 * before being stored in the system.
 	 * @param request The request from which we can read the file.
-	 * @return A response that contains an identifier that can be used to check
-	 * the status of the video processing, and eventually fetch the video.
+	 * @return A response containing the id of the video processing task, to be
+	 * given to the Gymboard API so that it can further manage processing after
+	 * a submission is completed.
 	 */
 	@Transactional
-	public FileUploadResponse processableVideoUpload(HttpServletRequest request) {
+	public VideoUploadResponse processableVideoUpload(HttpServletRequest request) {
 		String contentLengthStr = request.getHeader("Content-Length");
 		if (contentLengthStr == null || !contentLengthStr.matches("\\d+")) {
 			throw new ResponseStatusException(HttpStatus.LENGTH_REQUIRED);
@@ -46,34 +48,51 @@ public class UploadService {
 		if (contentLength > MAX_UPLOAD_SIZE_BYTES) {
 			throw new ResponseStatusException(HttpStatus.PAYLOAD_TOO_LARGE);
 		}
-		FileMetadata metadata = new FileMetadata();
-		metadata.mimeType = request.getContentType();
-		metadata.filename = request.getHeader("X-Gymboard-Filename");
-		if (metadata.filename == null) metadata.filename = "unnamed.mp4";
-		String fileId;
+		String filename = request.getHeader("X-Gymboard-Filename");
+		if (filename == null) filename = "unnamed.mp4";
+		FileMetadata metadata = new FileMetadata(
+				filename,
+				request.getContentType(),
+				false
+		);
+		String uploadFileId;
 		try {
-			fileId = fileStorageService.save(request.getInputStream(), metadata, contentLength);
+			uploadFileId = fileStorageService.save(request.getInputStream(), metadata, contentLength);
 		} catch (IOException e) {
 			log.error("Failed to save video upload to temp file.", e);
 			throw new ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR);
 		}
-		videoTaskRepository.save(new VideoProcessingTask(
-				VideoProcessingTask.Status.WAITING,
-				fileId,
-				"bleh"
+		var task = videoTaskRepository.save(new VideoProcessingTask(
+				VideoProcessingTask.Status.NOT_STARTED,
+				uploadFileId,
+				fileStorageService.generateFileId()
 		));
-		return new FileUploadResponse("bleh");
+		return new VideoUploadResponse(task.getId());
 	}
 
 	/**
 	 * Gets the status of a video processing task.
-	 * @param id The video identifier.
+	 * @param id The task id.
 	 * @return The status of the video processing task.
 	 */
 	@Transactional(readOnly = true)
-	public VideoProcessingTaskStatusResponse getVideoProcessingStatus(String id) {
-		VideoProcessingTask task = videoTaskRepository.findByVideoIdentifier(id)
+	public VideoProcessingTaskStatusResponse getVideoProcessingStatus(long id) {
+		VideoProcessingTask task = videoTaskRepository.findById(id)
 				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
 		return new VideoProcessingTaskStatusResponse(task.getStatus().name());
 	}
+
+	/**
+	 * Marks this task as waiting to be picked up for processing. The Gymboard
+	 * API should send a message itself to start processing of an uploaded video
+	 * once it validates a submission.
+	 * @param taskId The task id.
+	 */
+	@Transactional
+	public void startVideoProcessing(long taskId) {
+		VideoProcessingTask task = videoTaskRepository.findById(taskId)
+				.orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND));
+		task.setStatus(VideoProcessingTask.Status.WAITING);
+		videoTaskRepository.save(task);
+	}
 }

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/VideoProcessingService.java

@@ -1,7 +1,10 @@
-package nl.andrewlalis.gymboardcdn.service;
+package nl.andrewlalis.gymboardcdn.uploads.service;
 
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTask;
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTaskRepository;
+import nl.andrewlalis.gymboardcdn.files.FileMetadata;
+import nl.andrewlalis.gymboardcdn.files.FileStorageService;
+import nl.andrewlalis.gymboardcdn.files.util.ULID;
+import nl.andrewlalis.gymboardcdn.uploads.model.VideoProcessingTask;
+import nl.andrewlalis.gymboardcdn.uploads.model.VideoProcessingTaskRepository;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.scheduling.annotation.Scheduled;
@@ -65,7 +68,7 @@ public class VideoProcessingService {
 	private void processVideo(VideoProcessingTask task) {
 		log.info("Started processing task {}.", task.getId());
 
-		Path tempFilePath = fileStorageService.getStoragePathForFile(task.getRawUploadFileId());
+		Path tempFilePath = fileStorageService.getStoragePathForFile(task.getUploadFileId());
 		if (Files.notExists(tempFilePath) || !Files.isReadable(tempFilePath)) {
 			log.error("Temp file {} doesn't exist or isn't readable.", tempFilePath);
 			updateTask(task, VideoProcessingTask.Status.FAILED);
@@ -74,19 +77,20 @@ public class VideoProcessingService {
 
 		// Then begin running the actual FFMPEG processing.
 		Path tempDir = tempFilePath.getParent();
-		Files.createTempFile()
-		Path ffmpegOutputFile = tempDir.resolve(task.getVideoIdentifier());
+		Path ffmpegOutputFile = tempDir.resolve(task.getUploadFileId() + "-video-out");
+		Path ffmpegThumbnailOutputFile = tempDir.resolve(task.getUploadFileId() + "-thumbnail-out");
 		try {
-			processVideoWithFFMPEG(tempDir, tempFile, ffmpegOutputFile);
+			generateThumbnailWithFFMPEG(tempDir, tempFilePath, ffmpegThumbnailOutputFile);
+			processVideoWithFFMPEG(tempDir, tempFilePath, ffmpegOutputFile);
 		} catch (Exception e) {
 			e.printStackTrace();
 			log.error("""
-					Video processing failed for video {}:
+					Video processing failed for task {}:
 					  Input file:        {}
 					  Output file:       {}
 					  Exception message: {}""",
-					task.getVideoIdentifier(),
-					tempFile,
+					task.getId(),
+					tempFilePath,
 					ffmpegOutputFile,
 					e.getMessage()
 			);
@@ -95,24 +99,41 @@ public class VideoProcessingService {
 		}
 
 		// And finally, copy the output to the final location.
-		try {
-			StoredFile storedFile = new StoredFile(
-					task.getVideoIdentifier(),
-					task.getFilename(),
-					"video/mp4",
-					Files.size(ffmpegOutputFile),
-					task.getCreatedAt()
+		try (
+				var videoIn = Files.newInputStream(ffmpegOutputFile);
+				var thumbnailIn = Files.newInputStream(ffmpegThumbnailOutputFile)
+		) {
+			// Save the video to a final file location.
+			var originalMetadata = fileStorageService.getMetadata(task.getUploadFileId());
+			FileMetadata metadata = new FileMetadata(
+					originalMetadata.filename(),
+					originalMetadata.mimeType(),
+					true
 			);
-			Path finalFilePath = fileService.getStoragePathForFile(storedFile);
-			Files.move(ffmpegOutputFile, finalFilePath);
-			Files.deleteIfExists(tempFile);
-			Files.deleteIfExists(ffmpegOutputFile);
-			storedFileRepository.saveAndFlush(storedFile);
+			fileStorageService.save(ULID.parseULID(task.getVideoFileId()), videoIn, metadata, Files.size(ffmpegOutputFile));
+			// Save the thumbnail too.
+			FileMetadata thumbnailMetadata = new FileMetadata(
+					"thumbnail.jpeg",
+					"image/jpeg",
+					true
+			);
+			fileStorageService.save(thumbnailIn, thumbnailMetadata, Files.size(ffmpegThumbnailOutputFile));
 			updateTask(task, VideoProcessingTask.Status.COMPLETED);
-			log.info("Finished processing video {}.", task.getVideoIdentifier());
+			log.info("Finished processing task {}.", task.getId());
+
+			// TODO: Send HTTP POST to API, with video id and thumbnail id.
 		} catch (IOException e) {
 			log.error("Failed to copy processed video to final storage location.", e);
 			updateTask(task, VideoProcessingTask.Status.FAILED);
+		} finally {
+			try {
+				fileStorageService.delete(task.getUploadFileId());
+				Files.deleteIfExists(ffmpegOutputFile);
+				Files.deleteIfExists(ffmpegThumbnailOutputFile);
+			} catch (IOException e) {
+				log.error("Couldn't delete temporary FFMPEG output file: {}", ffmpegOutputFile);
+				e.printStackTrace();
+			}
 		}
 	}
 

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/process/FfmpegVideoProcessor.java

@@ -0,0 +1,47 @@
+package nl.andrewlalis.gymboardcdn.uploads.service.process;
+
+import nl.andrewlalis.gymboardcdn.uploads.service.CommandFailedException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Duration;
+import java.time.Instant;
+
+public class FfmpegVideoProcessor implements VideoProcessor {
+	private static final Logger log = LoggerFactory.getLogger(FfmpegVideoProcessor.class);
+
+	@Override
+	public void processVideo(Path inputFilePath, Path outputFilePath) throws IOException {
+		String inputFilename = inputFilePath.getFileName().toString().strip();
+		Path stdoutFile = inputFilePath.resolveSibling(inputFilename + "-ffmpeg-video-stdout.log");
+		Path stderrFile = inputFilePath.resolveSibling(inputFilename + "-ffmpeg-video-stderr.log");
+		final String[] command = {
+				"ffmpeg",
+				"-i", inputFilePath.toAbsolutePath().toString(),
+				"-vf", "scale=640x480:flags=lanczos",
+				"-vcodec", "libx264",
+				"-crf", "28",
+				"-f", "mp4",
+				outputFilePath.toAbsolutePath().toString()
+		};
+		long startFileSize = Files.size(inputFilePath);
+		Instant startTime = Instant.now();
+		Process process = new ProcessBuilder(command)
+				.redirectOutput(stdoutFile.toAbsolutePath().toFile())
+				.redirectError(stderrFile.toAbsolutePath().toFile())
+				.start();
+		int result = process.waitFor();
+		if (result != 0) {
+			throw new CommandFailedException(command, result, stdoutFile, stderrFile);
+		}
+		long endFileSize = Files.size(outputFilePath);
+		Duration duration = Duration.between(startTime, Instant.now());
+		double reductionFactor = startFileSize / (double) endFileSize;
+		String reductionFactorStr = String.format("%.3f%%", reductionFactor * 100);
+		log.info("Processed video from {} bytes to {} bytes in {} seconds, {} reduction.", startSize, endSize, dur.getSeconds(), reductionFactorStr);
+
+	}
+}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/process/ThumbnailGenerator.java

@@ -0,0 +1,7 @@
+package nl.andrewlalis.gymboardcdn.uploads.service.process;
+
+import java.nio.file.Path;
+
+public interface ThumbnailGenerator {
+	void generateThumbnailImage(Path videoInputFile, Path outputFilePath);
+}

gymboard-cdn/src/main/java/nl/andrewlalis/gymboardcdn/uploads/service/process/VideoProcessor.java

@@ -0,0 +1,8 @@
+package nl.andrewlalis.gymboardcdn.uploads.service.process;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+public interface VideoProcessor {
+	void processVideo(Path inputFilePath, Path outputFilePath) throws IOException;
+}

gymboard-cdn/src/test/java/nl/andrewlalis/gymboardcdn/service/UploadServiceTest.java

@@ -1,21 +1,11 @@
 package nl.andrewlalis.gymboardcdn.service;
 
-import jakarta.servlet.ServletInputStream;
-import jakarta.servlet.http.HttpServletRequest;
-import nl.andrewlalis.gymboardcdn.api.FileUploadResponse;
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTask;
-import nl.andrewlalis.gymboardcdn.model.VideoProcessingTaskRepository;
 import org.junit.jupiter.api.Test;
-import org.mockito.Mockito;
 
 import java.io.IOException;
-import java.io.InputStream;
-import java.nio.file.Path;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.mockito.AdditionalAnswers.returnsFirstArg;
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.*;
 
 public class UploadServiceTest {
 	/**