org.mmbase.streams.transcoders

Class CommandTranscoder

java.lang.Object

org.mmbase.streams.transcoders.AbstractTranscoder

org.mmbase.streams.transcoders.CommandTranscoder

All Implemented Interfaces:

Serializable, Cloneable, Transcoder, PublicCloneable<Transcoder>

Direct Known Subclasses:

FFMpeg2TheoraTranscoder, FFMpegSegmenterTranscoder, FFMpegTranscoder, SegmenterTranscoder

public abstract class CommandTranscoder
extends AbstractTranscoder

A transcoder based on an external command, like ffmpeg or ffmpeg2theora. To call the external command, CommandExecutor is used. This means that the command can run on the local machine, but also on a remote machine. This is indicated by setMethod(org.mmbase.util.externalprocess.CommandExecutor.Method), which is called for CommandExecutors when necessary by Job (and is based on settings in createcaches.xml). The command should be returns by getCommand(). The path of this command can be indicated by an appliction context setting 'path' in the namespace named after the class or a super class.

Version:

$Id$

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Field Summary

Fields inherited from class org.mmbase.streams.transcoders.AbstractTranscoder

clone, codec, format, in, mimeType, out, PACKAGE

Constructor Summary

Constructors

Constructor and Description
CommandTranscoder()

Method Summary

Modifier and Type	Method and Description
CommandTranscoder	clone()
protected abstract String[]	getArguments()
protected abstract String	getCommand()
protected String[]	getEnvironment()
protected LoggerWriter	getErrorWriter(Logger log)
String	getKey() Overrides the generation of a key in AbstractTranscoder to add extra transcoding parameters that were not set by Settings annotations on the transcoders.
protected LoggerWriter	getOutputWriter(Logger log)
void	setMethod(CommandExecutor.Method m) Indicates how and 'where' the command must run.
void	setPath(String p)
void	setProperty(String key, String value)
protected void	transcode(Logger log)

Methods inherited from class org.mmbase.streams.transcoders.AbstractTranscoder

getCodec, getFormat, getIn, getInstance, getMimeType, getOut, init, setCodec, setFormat, setMimeType, toString, transcode

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CommandTranscoder

public CommandTranscoder()

Method Detail

setProperty

public void setProperty(String key,
                        String value)

setMethod

public void setMethod(CommandExecutor.Method m)

Indicates how and 'where' the command must run.

setPath

public void setPath(String p)

getCommand

protected abstract String getCommand()

getEnvironment

protected String[] getEnvironment()

getArguments

protected abstract String[] getArguments()

getOutputWriter

protected LoggerWriter getOutputWriter(Logger log)

getErrorWriter

protected LoggerWriter getErrorWriter(Logger log)

getKey

public final String getKey()

Overrides the generation of a key in AbstractTranscoder to add extra transcoding parameters that were not set by Settings annotations on the transcoders.

Specified by:

getKey in interface Transcoder

Overrides:

getKey in class AbstractTranscoder

Returns:

A String. E.g. containing the actual class name plus parameters.

transcode

protected void transcode(Logger log)
                  throws Exception

Specified by:

transcode in class AbstractTranscoder

Throws:

Exception

clone

public CommandTranscoder clone()

Specified by:

clone in interface PublicCloneable<Transcoder>

Overrides:

clone in class AbstractTranscoder