diff --git a/lib/Service/RecordingService.php b/lib/Service/RecordingService.php
index 0f70e3848aa..037373ddcbe 100644
--- a/lib/Service/RecordingService.php
+++ b/lib/Service/RecordingService.php
@@ -45,6 +45,7 @@
 use OCP\TaskProcessing\IManager as ITaskProcessingManager;
 use OCP\TaskProcessing\Task;
 use OCP\TaskProcessing\TaskTypes\AudioToText;
+use OCP\TaskProcessing\TaskTypes\TextToText;
 use OCP\TaskProcessing\TaskTypes\TextToTextSummary;
 use Psr\Log\LoggerInterface;
 
@@ -455,15 +456,24 @@ public function storeTranscript(string $owner, string $roomToken, int $recording
 			return;
 		}
 
+		$customSummarizePrompt = $this->serverConfig->getAppValue('spreed', 'call_recording_summary_prompt', '');
+		if ($customSummarizePrompt !== '') {
+			$taskType = TextToText::ID;
+			$input = $customSummarizePrompt . "\n" . $output;
+		} else {
+			$taskType = TextToTextSummary::ID;
+			$input =  $output;
+		}
+
 		$supportedTaskTypeIds = $this->taskProcessingManager->getAvailableTaskTypeIds();
-		if (!in_array(TextToTextSummary::ID, $supportedTaskTypeIds, true)) {
-			$this->logger->error('Can not summarize call recording as no TextToTextSummary task provider is available');
+		if (!in_array($taskType, $supportedTaskTypeIds, true)) {
+			$this->logger->error('Can not summarize call recording as no ' . $taskType . ' task provider is available');
 			return;
 		}
 
 		$task = new Task(
-			TextToTextSummary::ID,
-			['input' => $output],
+			$taskType,
+			['input' => $input],
 			Application::APP_ID,
 			$owner,
 			'call/summary/' . $room->getToken() . '/' . $recordingFileId,
diff --git a/tests/php/Service/RecordingServiceTest.php b/tests/php/Service/RecordingServiceTest.php
index 57d32092451..7cb518fc775 100644
--- a/tests/php/Service/RecordingServiceTest.php
+++ b/tests/php/Service/RecordingServiceTest.php
@@ -47,6 +47,8 @@ function is_uploaded_file($filename) {
 use OCP\Share\IShare;
 use OCP\SystemTag\ISystemTagObjectMapper;
 use OCP\TaskProcessing\IManager as ITaskProcessingManager;
+use OCP\TaskProcessing\Task;
+use OCP\TaskProcessing\TaskTypes\TextToText;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\MockObject\MockObject;
 use Psr\Log\LoggerInterface;
@@ -405,4 +407,60 @@ public function testFinishUploadInvalidFormat(): void {
 		$this->expectExceptionMessage('file_mimetype');
 		$this->recordingService->finishUpload($room, $owner, 'name.ogg');
 	}
+
+	public function testStoreTranscriptWithCustomPrompt(): void {
+		$owner = 'user1';
+		$roomToken = 'token123';
+		$recordingFileId = 42;
+		$output = 'This is the transcript contents.';
+		$aiTask = 'transcript';
+		$customPrompt = 'Summarize this transcript:';
+
+		$userFolder = $this->createMock(Folder::class);
+		$this->rootFolder->method('getUserFolder')->with($owner)->willReturn($userFolder);
+		$recordingFolder = $this->createMock(Folder::class);
+		$recordingFolder->method('getName')->willReturn($roomToken);
+		$recording = $this->createMock(File::class);
+		$recording->method('getName')->willReturn('recording.ogg');
+		$recording->method('getParent')->willReturn($recordingFolder);
+		$userFolder->method('getById')->with($recordingFileId)->willReturn([$recording]);
+
+		$room = $this->createRoom($roomToken);
+		$participant = $this->createParticipant($room, $owner);
+		$this->roomManager->method('getRoomForUserByToken')->with($roomToken, $owner)->willReturn($room);
+		$this->participantService->method('getParticipant')->with($room, $owner)->willReturn($participant);
+
+		$this->serverConfig->method('getAppValue')
+			->willReturnCallback(
+				function (string $app, string $key, string $default = '') use ($customPrompt): string {
+					if ($key === 'call_recording_summary_prompt') {
+						return $customPrompt;
+					}
+
+					return $default;
+				}
+			);
+
+		$this->taskProcessingManager->method('getAvailableTaskTypeIds')->willReturn([TextToText::ID]);
+		$this->taskProcessingManager->expects($this->once())->method('scheduleTask')
+			->with($this->callback(
+				function (Task $task) use ($customPrompt, $output): bool {
+					if ($task->getTaskTypeId() !== TextToText::ID) {
+						return false;
+					}
+
+					return $task->getInput() === [
+						'input' => $customPrompt . "\n" . $output,
+					];
+				}
+			));
+
+		$this->recordingService->storeTranscript(
+			$owner,
+			$roomToken,
+			$recordingFileId,
+			$output,
+			$aiTask,
+		);
+	}
 }