ffmpeg - Alfresco 无法创建视频缩略图

Question

正如错误日志所说:Empty input file ...原来ImageMagick的源图大小为零。 (/data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg)。当我手动将源图像替换为普通图像并再次执行命令时，没有错误。
command: /data/was/alfresco/common/bin/convert /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg[0] -auto-orient -resize "100x100>" -strip -quiet /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_target_7652060684136589026.png
所以我认为源图像可能是由 FFMPEG 制作的通过捕获视频的某些帧。
和 FFMPEG不知何故未能做到这一点。不确定我的猜测是否正确...

但是我的FFMPEG与 ffmpeg -version 一样好用显示正确的版本信息。和FFMPEG由 root 运营并且 Alfresco 守护程序实例由 root 运行.似乎没有什么不妥。

请审查它。这是整个 Alfresco 共享日志:

Caused by: org.alfresco.service.cmr.repository.ContentIOException: 09160037 Content conversion failed:
   reader: ContentAccessor[ contentUrl=store:///data/was/alfresco/tomcat/temp/Alfresco/ComplextTransformer_intermediate_mp4_262176879279399174.jpg, mimetype=image/jpeg, size=0, encoding=UTF-8, locale=en_US]
   writer: ContentAccessor[ contentUrl=store:///data/was/alfresco/tomcat/temp/Alfresco/FailoverTransformer_intermediate_ComplexContentTransformer_5223852355212570043.png, mimetype=image/png, size=0, encoding=UTF-8, locale=en_US]
   options: {use=doclib, contentReaderNodeRef=null, contentWriterNodeRef=null, sourceContentProperty=null, imageAutoOrient=true, targetContentProperty=null, commandOptions=, imageResizeOptions=ImageResizeOptions [width=100, height=100, maintainAspectRatio=true, percentResize=false, resizeToThumbnail=false, allowEnlargement=false], includeEmbedded=null}
   limits: {timeoutMs=120000, pageLimit=1}
        at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:350)
        at org.alfresco.repo.content.transform.ComplexContentTransformer.transformInternal(ComplexContentTransformer.java:492)
        at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:272)
        ... 32 more
Caused by: org.alfresco.service.cmr.repository.ContentIOException: 09160036 Failed to perform ImageMagick transformation:
Execution result:
   os:         Linux
   command:    /data/was/alfresco/common/bin/convert /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg[0] -auto-orient -resize "100x100>" -strip -quiet /data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_target_7652060684136589026.png
   succeeded:  false
   exit code:  1
   out:
   err:        .convert.bin: Empty input file `/data/was/alfresco/tomcat/temp/Alfresco/ImageMagickContentTransformerWorker_source_8718262212685093199.jpg' @ error/jpeg.c/JPEGErrorHandler/331.
.convert.bin: NoImageForProperty "%w" @ warning/property
        at org.alfresco.repo.content.transform.magick.ImageMagickContentTransformerWorker.transformInternal(ImageMagickContentTransformerWorker.java:205)
        at org.alfresco.repo.content.transform.magick.AbstractImageMagickContentTransformerWorker.transform(AbstractImageMagickContentTransformerWorker.java:284)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.alfresco.repo.management.subsystems.SubsystemProxyFactory$1.invoke(SubsystemProxyFactory.java:79)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at com.sun.proxy.$Proxy28.transform(Unknown Source)
        at org.alfresco.repo.content.transform.ProxyContentTransformer.transformInternal(ProxyContentTransformer.java:107)
        at org.alfresco.repo.content.transform.AbstractContentTransformer2.transform(AbstractContentTransformer2.java:272)
        ... 34 more

在 alfresco-global.properties 中: ffmpeg.exe=/usr/local/bin/ffmpeg/ffmpeg
* 更新 正如罗伯特建议的那样，TransFormer 日志级别更改为调试。
但是日志太长，无法粘贴到这里。 SO中的正文有30,000个字符限制，而github没有。
所以请引用github问题，我把日志贴在那里。
https://github.com/Alfresco/share/issues/127

Answer 1

你所描述的已经是后果性错误。
视频预览由所谓的复杂转换器(转换器管道)创建。请为变压器启用日志记录，然后重试以找出最初的问题。

log4j.logger.org.alfresco.repo.content.transform.TransformerDebug=DEBUG
log4j.logger.org.alfresco.repo.content.transform=DEBUG

一些可能对您有帮助的来源:

Content Transformation Debug

Content Transformers (and Renditions)

测试变压器的一种简单方法是安装 ootbee-support-tools并使用 Test-Transform