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Java.lang.NoClassDefFoundError caused by FFmpeg when deployed on Linux as a packaged .war (Works on development machine)
27 décembre 2016, par Jake MillerI use an FFmpeg wrapper to create thumbnails for videos uploaded by users. This works perfectly fine when testing on my development machine. However, whenever I package my project as a .war and deploy to Amazon Web Services, I get the following stack trace :
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.javacpp.avutil
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_101]
at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_101]
at org.bytedeco.javacpp.Loader.load(Loader.java:472) ~[javacpp-1.2.1.jar!/:1.2.1]
at org.bytedeco.javacpp.Loader.load(Loader.java:417) ~[javacpp-1.2.1.jar!/:1.2.1]
at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2597) ~[ffmpeg-2.8.1-1.1.jar!/:1.2.1]
at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:391) ~[javacv-1.2.jar!/:1.2]
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:385) ~[javacv-1.2.jar!/:1.2]
at com.myapp.app.service.ICampaignService.createThumbnail(ICampaignService.java:425) ~[classes!/:0.0.44T-SNAPSHOT]
at com.myapp.app.service.ICampaignService$$FastClassBySpringCGLIB$$47736265.invoke(<generated>) ~[classes!/:0.0.44T-SNAPSHOT]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720) ~[spring-aop-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:280) ~[spring-tx-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655) ~[spring-aop-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at com.myapp.app.service.ICampaignService$$EnhancerBySpringCGLIB$$67e59894.createThumbnail(<generated>) ~[classes!/:0.0.44T-SNAPSHOT]
at com.myapp.app.controllers.CampaignController.uploadCampaign(CampaignController.java:237) ~[classes!/:0.0.44T-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) ~[spring-web-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) ~[spring-webmvc-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.2.RELEASE.jar!/:4.3.2.RELEASE]
... 85 common frames omitted
</generated></generated></clinit>Here’s my maven dependencies for the FFmpeg wrapper :
<dependency>
<groupid>org.bytedeco</groupid>
<artifactid>javacv</artifactid>
<version>1.3</version>
</dependency>
<dependency>
<groupid>org.bytedeco</groupid>
<artifactid>javacpp</artifactid>
<version>1.3</version>
</dependency>
<dependency>
<groupid>org.bytedeco.javacpp-presets</groupid>
<artifactid>ffmpeg</artifactid>
<version>3.2.1-1.3</version>
</dependency>
<dependency>
<groupid>org.bytedeco.javacpp-presets</groupid>
<artifactid>opencv-platform</artifactid>
<version>3.1.0-1.3</version>
</dependency>Again, this library works perfectly fine on my development machine.
-
Development machine : Windows 10, 64-bit (Works)
-
AWS instance:64bit Amazon Linux 2016.09 v2.2.0 running Java 8 (Causes the issue above)
I’ve spent around 7 hours trying to fix the issue by messing around with versions. Any idea how to solve this issue ?
EDIT
Dependency Tree :
[INFO] +- org.springframework.boot:spring-boot-starter-data-jpa:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot-autoconfigure:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.springframework.boot:spring-boot-starter-logging:jar:1.4.0.RELEASE:compile
[INFO] | | | +- ch.qos.logback:logback-classic:jar:1.1.7:compile
[INFO] | | | | \- ch.qos.logback:logback-core:jar:1.1.7:compile
[INFO] | | | +- org.slf4j:jul-to-slf4j:jar:1.7.21:compile
[INFO] | | | \- org.slf4j:log4j-over-slf4j:jar:1.7.21:compile
[INFO] | | \- org.yaml:snakeyaml:jar:1.17:runtime
[INFO] | +- org.springframework.boot:spring-boot-starter-aop:jar:1.4.0.RELEASE:compile
[INFO] | | \- org.aspectj:aspectjweaver:jar:1.8.9:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-jdbc:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.apache.tomcat:tomcat-jdbc:jar:8.5.4:compile
[INFO] | | | \- org.apache.tomcat:tomcat-juli:jar:8.5.4:compile
[INFO] | | \- org.springframework:spring-jdbc:jar:4.3.2.RELEASE:compile
[INFO] | +- org.hibernate:hibernate-core:jar:5.0.9.Final:compile
[INFO] | | +- org.jboss.logging:jboss-logging:jar:3.3.0.Final:compile
[INFO] | | +- org.hibernate.javax.persistence:hibernate-jpa-2.1-api:jar:1.0.0.Final:compile
[INFO] | | +- org.javassist:javassist:jar:3.20.0-GA:compile
[INFO] | | +- antlr:antlr:jar:2.7.7:compile
[INFO] | | +- org.jboss:jandex:jar:2.0.0.Final:compile
[INFO] | | +- dom4j:dom4j:jar:1.6.1:compile
[INFO] | | | \- xml-apis:xml-apis:jar:1.4.01:compile
[INFO] | | \- org.hibernate.common:hibernate-commons-annotations:jar:5.0.1.Final:compile
[INFO] | +- org.hibernate:hibernate-entitymanager:jar:5.0.9.Final:compile
[INFO] | +- javax.transaction:javax.transaction-api:jar:1.2:compile
[INFO] | +- org.springframework.data:spring-data-jpa:jar:1.10.2.RELEASE:compile
[INFO] | | +- org.springframework.data:spring-data-commons:jar:1.12.2.RELEASE:compile
[INFO] | | +- org.springframework:spring-orm:jar:4.3.2.RELEASE:compile
[INFO] | | +- org.springframework:spring-tx:jar:4.3.2.RELEASE:compile
[INFO] | | \- org.slf4j:jcl-over-slf4j:jar:1.7.21:compile
[INFO] | \- org.springframework:spring-aspects:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-security:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework:spring-aop:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework.security:spring-security-config:jar:4.1.1.RELEASE:compile
[INFO] | \- org.springframework.security:spring-security-web:jar:4.1.1.RELEASE:compile
[INFO] | \- org.springframework:spring-expression:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:1.4.0.RELEASE:compile
[INFO] | +- org.springframework.boot:spring-boot-starter-tomcat:jar:1.4.0.RELEASE:compile
[INFO] | | +- org.apache.tomcat.embed:tomcat-embed-core:jar:8.5.4:compile
[INFO] | | +- org.apache.tomcat.embed:tomcat-embed-el:jar:8.5.4:compile
[INFO] | | \- org.apache.tomcat.embed:tomcat-embed-websocket:jar:8.5.4:compile
[INFO] | +- org.hibernate:hibernate-validator:jar:5.2.4.Final:compile
[INFO] | | +- javax.validation:validation-api:jar:1.1.0.Final:compile
[INFO] | | \- com.fasterxml:classmate:jar:1.3.1:compile
[INFO] | +- com.fasterxml.jackson.core:jackson-databind:jar:2.8.1:compile
[INFO] | | +- com.fasterxml.jackson.core:jackson-annotations:jar:2.8.1:compile
[INFO] | | \- com.fasterxml.jackson.core:jackson-core:jar:2.8.1:compile
[INFO] | +- org.springframework:spring-web:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-webmvc:jar:4.3.2.RELEASE:compile
[INFO] +- org.springframework.boot:spring-boot-starter-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test:jar:1.4.0.RELEASE:test
[INFO] | +- org.springframework.boot:spring-boot-test-autoconfigure:jar:1.4.0.RELEASE:test
[INFO] | +- com.jayway.jsonpath:json-path:jar:2.2.0:test
[INFO] | | \- net.minidev:json-smart:jar:2.2.1:test
[INFO] | | \- net.minidev:accessors-smart:jar:1.1:test
[INFO] | | \- org.ow2.asm:asm:jar:5.0.3:test
[INFO] | +- junit:junit:jar:4.12:test
[INFO] | +- org.assertj:assertj-core:jar:2.5.0:test
[INFO] | +- org.mockito:mockito-core:jar:1.10.19:test
[INFO] | | \- org.objenesis:objenesis:jar:2.1:test
[INFO] | +- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] | +- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO] | +- org.skyscreamer:jsonassert:jar:1.3.0:test
[INFO] | | \- org.json:json:jar:20140107:test
[INFO] | +- org.springframework:spring-core:jar:4.3.2.RELEASE:compile
[INFO] | \- org.springframework:spring-test:jar:4.3.2.RELEASE:test
[INFO] +- org.springframework.security.oauth:spring-security-oauth2:jar:2.0.10.RELEASE:compile
[INFO] | +- org.springframework:spring-beans:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework:spring-context:jar:4.3.2.RELEASE:compile
[INFO] | +- org.springframework.security:spring-security-core:jar:4.1.1.RELEASE:compile
[INFO] | | \- aopalliance:aopalliance:jar:1.0:compile
[INFO] | +- commons-codec:commons-codec:jar:1.10:compile
[INFO] | \- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.13:compile
[INFO] | \- org.codehaus.jackson:jackson-core-asl:jar:1.9.13:compile
[INFO] +- org.springframework.security:spring-security-jwt:jar:1.0.4.RELEASE:compile
[INFO] | \- org.bouncycastle:bcpkix-jdk15on:jar:1.47:compile
[INFO] | \- org.bouncycastle:bcprov-jdk15on:jar:1.47:compile
[INFO] +- mysql:mysql-connector-java:jar:5.1.39:compile
[INFO] +- commons-io:commons-io:jar:2.5:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.0:compile
[INFO] +- org.bytedeco:javacv:jar:1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:flycapture:jar:2.9.3.43-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:libdc1394:jar:2.2.4-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:libfreenect:jar:0.5.3-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:librealsense:jar:1.9.6-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:videoinput:jar:0.200-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:artoolkitplus:jar:2.3.1-1.3:compile
[INFO] | \- org.bytedeco.javacpp-presets:flandmark:jar:1.07-1.3:compile
[INFO] +- org.bytedeco:javacpp:jar:1.3:compile
[INFO] +- org.bytedeco.javacpp-presets:ffmpeg:jar:3.2.1-1.3:compile
[INFO] +- org.bytedeco.javacpp-presets:opencv-platform:jar:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:android-arm:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:android-x86:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:linux-x86:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:linux-x86_64:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:linux-armhf:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:linux-ppc64le:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:macosx-x86_64:3.1.0-1.3:compile
[INFO] | +- org.bytedeco.javacpp-presets:opencv:jar:windows-x86:3.1.0-1.3:compile
[INFO] | \- org.bytedeco.javacpp-presets:opencv:jar:windows-x86_64:3.1.0-1.3:compile
[INFO] +- com.paypal.sdk:rest-api-sdk:jar:1.13.0:compile
[INFO] | +- org.slf4j:slf4j-api:jar:1.7.21:compile
[INFO] | \- com.google.code.gson:gson:jar:2.7:compile
[INFO] +- com.squareup.okhttp3:okhttp:jar:3.4.1:compile
[INFO] | \- com.squareup.okio:okio:jar:1.9.0:compile
[INFO] +- javax.mail:mail:jar:1.4:compile
[INFO] | \- javax.activation:activation:jar:1.1:compile
[INFO] \- com.amazonaws:aws-java-sdk:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-support:jar:1.11.58:compile
[INFO] | \- com.amazonaws:jmespath-java:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-simpledb:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-servicecatalog:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-servermigration:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-simpleworkflow:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-storagegateway:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-route53:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-s3:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-importexport:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-sts:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-sqs:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-rds:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-redshift:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elasticbeanstalk:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-glacier:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-iam:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-datapipeline:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elasticloadbalancing:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elasticloadbalancingv2:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-emr:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elasticache:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elastictranscoder:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-ec2:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-dynamodb:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-sns:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-budgets:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudtrail:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudwatch:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-logs:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-events:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cognitoidentity:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cognitosync:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-directconnect:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudformation:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudfront:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-kinesis:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-opsworks:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-ses:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-autoscaling:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudsearch:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudwatchmetrics:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-codedeploy:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-codepipeline:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-kms:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-config:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-lambda:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-ecs:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-ecr:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cloudhsm:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-ssm:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-workspaces:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-machinelearning:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-directory:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-efs:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-codecommit:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-devicefarm:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-elasticsearch:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-waf:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-marketplacecommerceanalytics:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-inspector:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-iot:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-api-gateway:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-acm:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-gamelift:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-dms:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-marketplacemeteringservice:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-cognitoidp:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-discovery:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-applicationautoscaling:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-snowball:jar:1.11.58:compile
[INFO] +- com.amazonaws:aws-java-sdk-core:jar:1.11.58:compile
[INFO] | +- commons-logging:commons-logging:jar:1.1.3:compile
[INFO] | +- org.apache.httpcomponents:httpclient:jar:4.5.2:compile
[INFO] | | \- org.apache.httpcomponents:httpcore:jar:4.4.5:compile
[INFO] | +- software.amazon.ion:ion-java:jar:1.0.1:compile
[INFO] | +- com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:jar:2.8.1:compile
[INFO] | \- joda-time:joda-time:jar:2.9.4:compile
[INFO] +- com.amazonaws:aws-java-sdk-models:jar:1.11.58:compile
[INFO] \- com.amazonaws:aws-java-sdk-swf-libraries:jar:1.11.22:compileError after upgrading Linux to 2.4, downgrading javacpp to 1.2.1, and running mvn clean :
java.lang.NoClassDefFoundError: Could not initialize class org.bytedeco.javacpp.avutil
at java.lang.Class.forName0(Native Method) ~[na:1.8.0_111]
at java.lang.Class.forName(Class.java:348) ~[na:1.8.0_111]
at org.bytedeco.javacpp.Loader.load(Loader.java:472) ~[javacpp-1.2.1.jar!/:1.2.1]
at org.bytedeco.javacpp.Loader.load(Loader.java:417) ~[javacpp-1.2.1.jar!/:1.2.1]
at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2819) ~[ffmpeg-3.2.1-1.3.jar!/:1.2.1]
at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:391) ~[javacv-1.3.jar!/:1.3]
at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:385) ~[javacv-1.3.jar!/:1.3]
</clinit>WHAT I’VE TRIED SO FAR
- upgrade to Linux to 2.4
- downgrading javacpp to 1.2.1
- running mvn clean
- running mvn -U
- deleting contents of /.m2/ and redownloading dependencies
- various combinations of dependency versions
git cloneon a Linux VM & runningmvn installthere
-
-
Encoding Exception during Transcode with audio files
6 mai 2016, par Hakop ZakaryanI am attempting to transcode using an FFMPEG Wrapper Library called JAVE on Mac OSX 10.11.3 using Eclipse 4.50
My Converter.java class looks something like this :
package matador;
import it.sauronsoftware.jave.AudioAttributes;
import it.sauronsoftware.jave.EncodingAttributes;
import it.sauronsoftware.jave.EncoderException;
import it.sauronsoftware.jave.InputFormatException;
import it.sauronsoftware.jave.Encoder;
import java.io.*;
public class Converter {
public static void main(String[] args) throws InputFormatException, EncoderException {
File source = new File("Classic.m4a");
File target = new File("target.mp3");
AudioAttributes audio = new AudioAttributes();
audio.setCodec("libmp3lame");
audio.setBitRate(new Integer(128000));
audio.setChannels(new Integer(2));
audio.setSamplingRate(new Integer(44100));
EncodingAttributes attrs = new EncodingAttributes();
attrs.setFormat("mp3");
attrs.setAudioAttributes(audio);
Encoder encoder = new Encoder(new MyFFMPEGExecutableLocator());
try {
encoder.encode(source, target, attrs, null);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InputFormatException e) {
e.printStackTrace();
} catch (EncoderException e) {
e.printStackTrace();
}
}
}The problem I am running into is that with specific audio files (regardless of format) give me this EncoderException :
it.sauronsoftware.jave.EncoderException: Metadata:
at it.sauronsoftware.jave.Encoder.encode(Encoder.java:863)
at matador.Converter.main(Converter.java:32)I have looked through Encoder.java and the EncoderException on line 863 is this specific code :
} else if (!line.startsWith("Output #0")) {
throw new EncoderException(line);I have been unable to figure out why this may be occurring but specific audio files (WAV/AAC/etc) do encode yet a majority just give this exception.
Thank you for the help !
Edit : As per request for possibly being able to help me further, here is the entirety of the Encoder.java code :
package it.sauronsoftware.jave;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Encoder {
private static final Pattern FORMAT_PATTERN = Pattern
.compile("^\\s*([D ])([E ])\\s+([\\w,]+)\\s+.+$");
private static final Pattern ENCODER_DECODER_PATTERN = Pattern.compile(
"^\\s*([D ])([E ])([AVS]).{3}\\s+(.+)$", Pattern.CASE_INSENSITIVE);
private static final Pattern PROGRESS_INFO_PATTERN = Pattern.compile(
"\\s*(\\w+)\\s*=\\s*(\\S+)\\s*", Pattern.CASE_INSENSITIVE);
private static final Pattern SIZE_PATTERN = Pattern.compile(
"(\\d+)x(\\d+)", Pattern.CASE_INSENSITIVE);
private static final Pattern FRAME_RATE_PATTERN = Pattern.compile(
"([\\d.]+)\\s+(?:fps|tb\\(r\\))", Pattern.CASE_INSENSITIVE);
private static final Pattern BIT_RATE_PATTERN = Pattern.compile(
"(\\d+)\\s+kb/s", Pattern.CASE_INSENSITIVE);
private static final Pattern SAMPLING_RATE_PATTERN = Pattern.compile(
"(\\d+)\\s+Hz", Pattern.CASE_INSENSITIVE);
private static final Pattern CHANNELS_PATTERN = Pattern.compile(
"(mono|stereo)", Pattern.CASE_INSENSITIVE);
private static final Pattern SUCCESS_PATTERN = Pattern.compile(
"^\\s*video\\:\\S+\\s+audio\\:\\S+\\s+global headers\\:\\S+.*$",
Pattern.CASE_INSENSITIVE);
private FFMPEGLocator locator;
public Encoder() {
this.locator = new DefaultFFMPEGLocator();
}
public Encoder(FFMPEGLocator locator) {
this.locator = locator;
}
public String[] getAudioDecoders() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = ENCODER_DECODER_PATTERN.matcher(line);
if (matcher.matches()) {
String decoderFlag = matcher.group(1);
String audioVideoFlag = matcher.group(3);
if ("D".equals(decoderFlag)
&& "A".equals(audioVideoFlag)) {
String name = matcher.group(4);
res.add(name);
}
} else {
break;
}
} else if (line.trim().equals("Codecs:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public String[] getAudioEncoders() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = ENCODER_DECODER_PATTERN.matcher(line);
if (matcher.matches()) {
String encoderFlag = matcher.group(2);
String audioVideoFlag = matcher.group(3);
if ("E".equals(encoderFlag)
&& "A".equals(audioVideoFlag)) {
String name = matcher.group(4);
res.add(name);
}
} else {
break;
}
} else if (line.trim().equals("Codecs:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public String[] getVideoDecoders() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = ENCODER_DECODER_PATTERN.matcher(line);
if (matcher.matches()) {
String decoderFlag = matcher.group(1);
String audioVideoFlag = matcher.group(3);
if ("D".equals(decoderFlag)
&& "V".equals(audioVideoFlag)) {
String name = matcher.group(4);
res.add(name);
}
} else {
break;
}
} else if (line.trim().equals("Codecs:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public String[] getVideoEncoders() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = ENCODER_DECODER_PATTERN.matcher(line);
if (matcher.matches()) {
String encoderFlag = matcher.group(2);
String audioVideoFlag = matcher.group(3);
if ("E".equals(encoderFlag)
&& "V".equals(audioVideoFlag)) {
String name = matcher.group(4);
res.add(name);
}
} else {
break;
}
} else if (line.trim().equals("Codecs:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public String[] getSupportedEncodingFormats() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = FORMAT_PATTERN.matcher(line);
if (matcher.matches()) {
String encoderFlag = matcher.group(2);
if ("E".equals(encoderFlag)) {
String aux = matcher.group(3);
StringTokenizer st = new StringTokenizer(aux, ",");
while (st.hasMoreTokens()) {
String token = st.nextToken().trim();
if (!res.contains(token)) {
res.add(token);
}
}
}
} else {
break;
}
} else if (line.trim().equals("File formats:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public String[] getSupportedDecodingFormats() throws EncoderException {
ArrayList res = new ArrayList();
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-formats");
try {
ffmpeg.execute();
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getInputStream()));
String line;
boolean evaluate = false;
while ((line = reader.readLine()) != null) {
if (line.trim().length() == 0) {
continue;
}
if (evaluate) {
Matcher matcher = FORMAT_PATTERN.matcher(line);
if (matcher.matches()) {
String decoderFlag = matcher.group(1);
if ("D".equals(decoderFlag)) {
String aux = matcher.group(3);
StringTokenizer st = new StringTokenizer(aux, ",");
while (st.hasMoreTokens()) {
String token = st.nextToken().trim();
if (!res.contains(token)) {
res.add(token);
}
}
}
} else {
break;
}
} else if (line.trim().equals("File formats:")) {
evaluate = true;
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
int size = res.size();
String[] ret = new String[size];
for (int i = 0; i < size; i++) {
ret[i] = (String) res.get(i);
}
return ret;
}
public MultimediaInfo getInfo(File source) throws InputFormatException,
EncoderException {
FFMPEGExecutor ffmpeg = locator.createExecutor();
ffmpeg.addArgument("-i");
ffmpeg.addArgument(source.getAbsolutePath());
try {
ffmpeg.execute();
} catch (IOException e) {
throw new EncoderException(e);
}
try {
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getErrorStream()));
return parseMultimediaInfo(source, reader);
} finally {
ffmpeg.destroy();
}
}
private MultimediaInfo parseMultimediaInfo(File source,
RBufferedReader reader) throws InputFormatException,
EncoderException {
Pattern p1 = Pattern.compile("^\\s*Input #0, (\\w+).+$\\s*",
Pattern.CASE_INSENSITIVE);
Pattern p2 = Pattern.compile(
"^\\s*Duration: (\\d\\d):(\\d\\d):(\\d\\d)\\.(\\d).*$",
Pattern.CASE_INSENSITIVE);
Pattern p3 = Pattern.compile(
"^\\s*Stream #\\S+: ((?:Audio)|(?:Video)|(?:Data)): (.*)\\s*$",
Pattern.CASE_INSENSITIVE);
MultimediaInfo info = null;
try {
int step = 0;
while (true) {
String line = reader.readLine();
if (line == null) {
break;
}
if (step == 0) {
String token = source.getAbsolutePath() + ": ";
if (line.startsWith(token)) {
String message = line.substring(token.length());
throw new InputFormatException(message);
}
Matcher m = p1.matcher(line);
if (m.matches()) {
String format = m.group(1);
info = new MultimediaInfo();
info.setFormat(format);
step++;
}
} else if (step == 1) {
Matcher m = p2.matcher(line);
if (m.matches()) {
long hours = Integer.parseInt(m.group(1));
long minutes = Integer.parseInt(m.group(2));
long seconds = Integer.parseInt(m.group(3));
long dec = Integer.parseInt(m.group(4));
long duration = (dec * 100L) + (seconds * 1000L)
+ (minutes * 60L * 1000L)
+ (hours * 60L * 60L * 1000L);
info.setDuration(duration);
step++;
} else {
step = 3;
}
} else if (step == 2) {
Matcher m = p3.matcher(line);
if (m.matches()) {
String type = m.group(1);
String specs = m.group(2);
if ("Video".equalsIgnoreCase(type)) {
VideoInfo video = new VideoInfo();
StringTokenizer st = new StringTokenizer(specs, ",");
for (int i = 0; st.hasMoreTokens(); i++) {
String token = st.nextToken().trim();
if (i == 0) {
video.setDecoder(token);
} else {
boolean parsed = false;
// Video size.
Matcher m2 = SIZE_PATTERN.matcher(token);
if (!parsed && m2.find()) {
int width = Integer.parseInt(m2
.group(1));
int height = Integer.parseInt(m2
.group(2));
video.setSize(new VideoSize(width,
height));
parsed = true;
}
// Frame rate.
m2 = FRAME_RATE_PATTERN.matcher(token);
if (!parsed && m2.find()) {
try {
float frameRate = Float
.parseFloat(m2.group(1));
video.setFrameRate(frameRate);
} catch (NumberFormatException e) {
;
}
parsed = true;
}
// Bit rate.
m2 = BIT_RATE_PATTERN.matcher(token);
if (!parsed && m2.find()) {
int bitRate = Integer.parseInt(m2
.group(1));
video.setBitRate(bitRate);
parsed = true;
}
}
}
info.setVideo(video);
} else if ("Audio".equalsIgnoreCase(type)) {
AudioInfo audio = new AudioInfo();
StringTokenizer st = new StringTokenizer(specs, ",");
for (int i = 0; st.hasMoreTokens(); i++) {
String token = st.nextToken().trim();
if (i == 0) {
audio.setDecoder(token);
} else {
boolean parsed = false;
// Sampling rate.
Matcher m2 = SAMPLING_RATE_PATTERN
.matcher(token);
if (!parsed && m2.find()) {
int samplingRate = Integer.parseInt(m2
.group(1));
audio.setSamplingRate(samplingRate);
parsed = true;
}
// Channels.
m2 = CHANNELS_PATTERN.matcher(token);
if (!parsed && m2.find()) {
String ms = m2.group(1);
if ("mono".equalsIgnoreCase(ms)) {
audio.setChannels(1);
} else if ("stereo"
.equalsIgnoreCase(ms)) {
audio.setChannels(2);
}
parsed = true;
}
// Bit rate.
m2 = BIT_RATE_PATTERN.matcher(token);
if (!parsed && m2.find()) {
int bitRate = Integer.parseInt(m2
.group(1));
audio.setBitRate(bitRate);
parsed = true;
}
}
}
info.setAudio(audio);
}
} else {
step = 3;
}
}
if (step == 3) {
reader.reinsertLine(line);
break;
}
}
} catch (IOException e) {
throw new EncoderException(e);
}
if (info == null) {
throw new InputFormatException();
}
return info;
}
private Hashtable parseProgressInfoLine(String line) {
Hashtable table = null;
Matcher m = PROGRESS_INFO_PATTERN.matcher(line);
while (m.find()) {
if (table == null) {
table = new Hashtable();
}
String key = m.group(1);
String value = m.group(2);
table.put(key, value);
}
return table;
}
public void encode(File source, File target, EncodingAttributes attributes)
throws IllegalArgumentException, InputFormatException,
EncoderException {
encode(source, target, attributes, null);
}
public void encode(File source, File target, EncodingAttributes attributes,
EncoderProgressListener listener) throws IllegalArgumentException,
InputFormatException, EncoderException {
String formatAttribute = attributes.getFormat();
Float offsetAttribute = attributes.getOffset();
Float durationAttribute = attributes.getDuration();
AudioAttributes audioAttributes = attributes.getAudioAttributes();
VideoAttributes videoAttributes = attributes.getVideoAttributes();
if (audioAttributes == null && videoAttributes == null) {
throw new IllegalArgumentException(
"Both audio and video attributes are null");
}
target = target.getAbsoluteFile();
target.getParentFile().mkdirs();
FFMPEGExecutor ffmpeg = locator.createExecutor();
if (offsetAttribute != null) {
ffmpeg.addArgument("-ss");
ffmpeg.addArgument(String.valueOf(offsetAttribute.floatValue()));
}
ffmpeg.addArgument("-i");
ffmpeg.addArgument(source.getAbsolutePath());
if (durationAttribute != null) {
ffmpeg.addArgument("-t");
ffmpeg.addArgument(String.valueOf(durationAttribute.floatValue()));
}
if (videoAttributes == null) {
ffmpeg.addArgument("-vn");
} else {
String codec = videoAttributes.getCodec();
if (codec != null) {
ffmpeg.addArgument("-vcodec");
ffmpeg.addArgument(codec);
}
String tag = videoAttributes.getTag();
if (tag != null) {
ffmpeg.addArgument("-vtag");
ffmpeg.addArgument(tag);
}
Integer bitRate = videoAttributes.getBitRate();
if (bitRate != null) {
ffmpeg.addArgument("-b");
ffmpeg.addArgument(String.valueOf(bitRate.intValue()));
}
Integer frameRate = videoAttributes.getFrameRate();
if (frameRate != null) {
ffmpeg.addArgument("-r");
ffmpeg.addArgument(String.valueOf(frameRate.intValue()));
}
VideoSize size = videoAttributes.getSize();
if (size != null) {
ffmpeg.addArgument("-s");
ffmpeg.addArgument(String.valueOf(size.getWidth()) + "x"
+ String.valueOf(size.getHeight()));
}
}
if (audioAttributes == null) {
ffmpeg.addArgument("-an");
} else {
String codec = audioAttributes.getCodec();
if (codec != null) {
ffmpeg.addArgument("-acodec");
ffmpeg.addArgument(codec);
}
Integer bitRate = audioAttributes.getBitRate();
if (bitRate != null) {
ffmpeg.addArgument("-ab");
ffmpeg.addArgument(String.valueOf(bitRate.intValue()));
}
Integer channels = audioAttributes.getChannels();
if (channels != null) {
ffmpeg.addArgument("-ac");
ffmpeg.addArgument(String.valueOf(channels.intValue()));
}
Integer samplingRate = audioAttributes.getSamplingRate();
if (samplingRate != null) {
ffmpeg.addArgument("-ar");
ffmpeg.addArgument(String.valueOf(samplingRate.intValue()));
}
Integer volume = audioAttributes.getVolume();
if (volume != null) {
ffmpeg.addArgument("-vol");
ffmpeg.addArgument(String.valueOf(volume.intValue()));
}
}
ffmpeg.addArgument("-f");
ffmpeg.addArgument(formatAttribute);
ffmpeg.addArgument("-y");
ffmpeg.addArgument(target.getAbsolutePath());
try {
ffmpeg.execute();
} catch (IOException e) {
throw new EncoderException(e);
}
try {
String lastWarning = null;
long duration;
long progress = 0;
RBufferedReader reader = null;
reader = new RBufferedReader(new InputStreamReader(ffmpeg
.getErrorStream()));
MultimediaInfo info = parseMultimediaInfo(source, reader);
if (durationAttribute != null) {
duration = (long) Math
.round((durationAttribute.floatValue() * 1000L));
} else {
duration = info.getDuration();
if (offsetAttribute != null) {
duration -= (long) Math
.round((offsetAttribute.floatValue() * 1000L));
}
}
if (listener != null) {
listener.sourceInfo(info);
}
int step = 0;
String line;
while ((line = reader.readLine()) != null) {
if (step == 0) {
if (line.startsWith("WARNING: ")) {
if (listener != null) {
listener.message(line);
}
} else if (!line.startsWith("Output #0")) {
throw new EncoderException(line);
} else {
step++;
}
} else if (step == 1) {
if (!line.startsWith(" ")) {
step++;
}
}
if (step == 2) {
if (!line.startsWith("Stream mapping:")) {
throw new EncoderException(line);
} else {
step++;
}
} else if (step == 3) {
if (!line.startsWith(" ")) {
step++;
}
}
if (step == 4) {
line = line.trim();
if (line.length() > 0) {
Hashtable table = parseProgressInfoLine(line);
if (table == null) {
if (listener != null) {
listener.message(line);
}
lastWarning = line;
} else {
if (listener != null) {
String time = (String) table.get("time");
if (time != null) {
int dot = time.indexOf('.');
if (dot > 0 && dot == time.length() - 2
&& duration > 0) {
String p1 = time.substring(0, dot);
String p2 = time.substring(dot + 1);
try {
long i1 = Long.parseLong(p1);
long i2 = Long.parseLong(p2);
progress = (i1 * 1000L)
+ (i2 * 100L);
int perm = (int) Math
.round((double) (progress * 1000L)
/ (double) duration);
if (perm > 1000) {
perm = 1000;kMDItemAudioEncodingApplication = "Lavf57.26.100"
}
listener.progress(perm);
} catch (NumberFormatException e) {
;
}
}
}
}
lastWarning = null;
}
}
}
}
if (lastWarning != null) {
if (!SUCCESS_PATTERN.matcher(lastWarning).matches()) {
throw new EncoderException(lastWarning);
}
}
} catch (IOException e) {
throw new EncoderException(e);
} finally {
ffmpeg.destroy();
}
}
} -
Chiptune Database and API
14 septembre 2012, par Multimedia Mike — GeneralSo I set out to create a website that allows people to easily listen to video game music directly through their web browser. I succeeded in that goal. However, I must admit that the project has limited appeal since the web player is delivered via Chrome’s Native Client technology, somewhat limiting its audience. I’m not certain if anyone really expects NaCl to take off in any serious way, but I still have a few other projects in mind.
I recently realized that, as a side effect of this project, I accidentally created something of significant value to fans of old video games and associated music– a searchable database of chiptune music and metadata. To my knowledge, no one else has endeavored to create such a thing. I figured that I might as well make the database easily accessible with an API and see where it leads.
To that end, I created 2 API entry points. First, there is the search API located at http://gamemusic.multimedia.cx/api/search/. This can be exercised by ending the URL with a URL-encoded search string, e.g. : http://gamemusic.multimedia.cx/api/search/super+mario. This returns JSON data containing an array of results in decreasing order of relevance. Each result has a game title, database ID, media URL, system type, and an SHA-1 hash. This is the same API that the site’s own search page uses.
The database ID can be plugged into http://gamemusic.multimedia.cx/api/metadata/ to retrieve the song’s metadata in JSON format. E.g., the ID for Super Mario Bros. 3 on the NES is 161 : http://gamemusic.multimedia.cx/api/metadata/161.
I recently read an article about sins against true RESTful API principles which led me to believe I’m almost certainly doing this web API stuff wrong. I don’t think it’s a huge deal, though, since I don’t think anyone actually listens to chiptunes any more. But if there are offline chiptune music players that are still in service and actively maintained, perhaps the authors would like to implement this API. It would require some type of HTTP networking library, a JSON parser, the embedded XZ decoder, and some new code to parse through my .gamemusic and .psfarchive formats.
This database could be a significant value-add to chiptune playback software, and could help people experience classic game music much more easily.
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