net.informaticalibera.videoediting

Class VideoOptimizer

java.lang.Object

net.informaticalibera.videoediting.VideoOptimizer

public class VideoOptimizer
extends java.lang.Object

Video Optimizer CN1Lib public layer class: use this class to get info about a video, to get a preview of a video and to optimize a video for fast upload.

Constructor Summary

Constructors

Constructor and Description
VideoOptimizer()

Method Summary

Modifier and Type	Method and Description
int	getVideoBitrate(java.lang.String videoFile) Get the average bitrate (in bits/sec), or -1 in case of error.
long	getVideoDuration(java.lang.String videoFile) Returns the duration of the videoFile in seconds, or -1 in case of error
java.lang.String	getVideoPreview(java.lang.String videoFile) Extract a frame from the given video and returns a jpeg file, or null in case of error
com.codename1.ui.geom.Dimension	getVideoSize(java.lang.String videoFile) Returns the size of the given video, or null in case of error
void	optimizeVideoForUpload(java.lang.String videoFile, com.codename1.util.OnComplete<java.lang.String> onCompleteCallback, java.lang.Runnable onFailureCallback, OnProgress onProgressCallback) Asynchronous method to optimize a video for fast upload and maximum compatibility: it produces a new mp4 file placed in FileSystemStorage (it ensures to don't overwrite any existing file); note that it produces always an "mp4" file even if the source video is in QuickTime format.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VideoOptimizer

public VideoOptimizer()

Method Detail

getVideoDuration

public long getVideoDuration(java.lang.String videoFile)

Returns the duration of the videoFile in seconds, or -1 in case of error

Parameters:

videoFile - placed in FileSystemStorage

Returns:

duration in seconds, or -1

getVideoPreview

public java.lang.String getVideoPreview(java.lang.String videoFile)

Extract a frame from the given video and returns a jpeg file, or null in case of error

Parameters:

videoFile - placed in FileSystemStorage

Returns:

the jpeg preview placed in FileSystemStorage (or null in case of error), it ensures to don't overwrite any existing file

getVideoBitrate

public int getVideoBitrate(java.lang.String videoFile)

Get the average bitrate (in bits/sec), or -1 in case of error.

Parameters:

videoFile - placed in FileSystemStorage

Returns:

average bitrate (in bits/sec), or -1 in case of error

getVideoSize

public com.codename1.ui.geom.Dimension getVideoSize(java.lang.String videoFile)

Returns the size of the given video, or null in case of error

Parameters:

videoFile - placed in FileSystemStorage

Returns:

the size of the given video, or null in case of error

optimizeVideoForUpload

public void optimizeVideoForUpload(java.lang.String videoFile,
                                   com.codename1.util.OnComplete<java.lang.String> onCompleteCallback,
                                   java.lang.Runnable onFailureCallback,
                                   OnProgress onProgressCallback)

Asynchronous method to optimize a video for fast upload and maximum compatibility: it produces a new mp4 file placed in FileSystemStorage (it ensures to don't overwrite any existing file); note that it produces always an "mp4" file even if the source video is in QuickTime format.

This method is cpu-intensive and it can require a time to complete longer than the video duration.

It throws an IllegalStateException if you invoke this method when there is an ongoing video optimization: you must wait that it finishes before invoking this method again.

Parameters:

videoFile - placed in FileSystemStorage

onCompleteCallback - executed when the saving of the new video is completed

onFailureCallback - generic callback in case of error, note that errors are logged by the EDT

onProgressCallback - generic callback invoked every second to update the UI with the progress percentage (from 0 to 99)