build: add ffmpeg and javacv dependencies

server/build.gradle

@@ -53,6 +53,10 @@ ext {
     pf4j = '3.9.0'
     jsoup = '1.15.3'
     springDocOpenAPI = "2.0.2"
+    javaCvVersion = '1.5.9'
+    ffmpegVersion = '6.0'
+    osWindowsX86_64 = 'windows-x86_64'
+    osLinuxX86_64 = 'linux-x86_64'
 }
 
 dependencies {
@@ -65,6 +69,13 @@ dependencies {
     implementation 'org.apache.httpcomponents.client5:httpclient5:5.2.1'
     implementation 'org.json:json:20230227'
 
+    // ffmpeg
+    implementation "org.bytedeco:javacv:$javaCvVersion"
+    implementation "org.bytedeco:javacpp-platform:$javaCvVersion"
+    implementation "org.bytedeco:ffmpeg:$ffmpegVersion-$javaCvVersion"
+    implementation "org.bytedeco:ffmpeg:$ffmpegVersion-$javaCvVersion:$osWindowsX86_64"
+    implementation "org.bytedeco:ffmpeg:$ffmpegVersion-$javaCvVersion:$osLinuxX86_64"
+
     developmentOnly 'org.springframework.boot:spring-boot-devtools'
 
     testImplementation 'org.springframework.boot:spring-boot-starter-test'

server/src/test/java/run/ikaros/server/ffmpeg/FfmpegTest.java

@@ -0,0 +1,41 @@
+package run.ikaros.server.ffmpeg;
+
+import static org.bytedeco.ffmpeg.global.avformat.av_dump_format;
+import static org.bytedeco.ffmpeg.global.avformat.avformat_close_input;
+import static org.bytedeco.ffmpeg.global.avformat.avformat_find_stream_info;
+import static org.bytedeco.ffmpeg.global.avformat.avformat_open_input;
+import static org.bytedeco.ffmpeg.global.avutil.av_strerror;
+
+import org.bytedeco.ffmpeg.avformat.AVFormatContext;
+import org.bytedeco.javacpp.BytePointer;
+import org.bytedeco.javacpp.PointerPointer;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+public class FfmpegTest {
+
+    static void check(int err) {
+        if (err < 0) {
+            BytePointer e = new BytePointer(512);
+            av_strerror(err, e, 512);
+            throw new RuntimeException(
+                e.getString().substring(0, (int) BytePointer.strlen(e)) + ":" + err);
+        }
+    }
+
+    @Test
+    @Disabled
+    void getVideoInfo() {
+        String fileName = System.getenv("IKAROS_FFMPEG_TEST_VIDEO_URL");
+        AVFormatContext inputFormatContext = new AVFormatContext(null);
+        try {
+            check(avformat_open_input(inputFormatContext, fileName, null, null));
+            check(avformat_find_stream_info(inputFormatContext, (PointerPointer) null));
+            av_dump_format(inputFormatContext, 0, fileName, 0);
+        } finally {
+            avformat_close_input(inputFormatContext);
+        }
+    }
+
+
+}