推荐一款基于Java的音视频处理开源项目--JAVE

JAVE（Java Audio Video Encoder），是一款将音频和视频在不同格式间进行转化的工具，是基于ffmpeg项目的Java封装。

JAVE，需要J2SE 1.4+、Windows 或 Linux 操作系统均可运行。

JAVE支持的编码和解码格式见下表：

Decoding

Formato Descrizione

4xm	4X Technologies format
MTV	MTV format
RoQ	Id RoQ format
aac	ADTS AAC
ac3	raw ac3
aiff	Audio IFF
alaw	pcm A law format
amr	3gpp amr file format
apc	CRYO APC format
ape	Monkey's Audio
asf	asf format
au	SUN AU Format
avi	avi format
avs	AVISynth
bethsoftvid	Bethesda Softworks 'Daggerfall' VID format
c93	Interplay C93
daud	D-Cinema audio format
dsicin	Delphine Software International CIN format
dts	raw dts
dv	DV video format
dxa	dxa
ea	Electronic Arts Multimedia Format
ea_cdata	Electronic Arts cdata
ffm	ffm format
film_cpk	Sega FILM/CPK format
flac	raw flac
flic	FLI/FLC/FLX animation format
flv	flv format
gif	GIF Animation
gxf	GXF format
h261	raw h261
h263	raw h263
h264	raw H264 video format
idcin	Id CIN format
image2	image2 sequence
image2pipe	piped image2 sequence
ingenient	Ingenient MJPEG
ipmovie	Interplay MVE format
libnut	nut format
m4v	raw MPEG4 video format
matroska	Matroska File Format
mjpeg	MJPEG video
mm	American Laser Games MM format
mmf	mmf format
mov,mp4,m4a,3gp,3g2,mj2	QuickTime/MPEG4/Motion JPEG 2000 format
mp3	MPEG audio layer 3
mpc	musepack
mpc8	musepack8
mpeg	MPEG1 System format
mpegts	MPEG2 transport stream format
mpegtsraw	MPEG2 raw transport stream format
mpegvideo	MPEG video
mulaw	pcm mu law format
mxf	MXF format
nsv	NullSoft Video format
nut	nut format
nuv	NuppelVideo format
ogg	Ogg format
psxstr	Sony Playstation STR format
rawvideo	raw video format
redir	Redirector format
rm	rm format
rtsp	RTSP input format
s16be	pcm signed 16 bit big endian format
s16le	pcm signed 16 bit little endian format
s8	pcm signed 8 bit format
sdp	SDP
shn	raw shorten
siff	Beam Software SIFF
smk	Smacker Video
sol	Sierra SOL Format
swf	Flash format
thp	THP
tiertexseq	Tiertex Limited SEQ format
tta	true-audio
txd	txd format
u16be	pcm unsigned 16 bit big endian format
u16le	pcm unsigned 16 bit little endian format
u8	pcm unsigned 8 bit format
vc1	raw vc1
vmd	Sierra VMD format
voc	Creative Voice File format
wav	wav format
wc3movie	Wing Commander III movie format
wsaud	Westwood Studios audio format
wsvqa	Westwood Studios VQA format
wv	WavPack
yuv4mpegpipe	YUV4MPEG pipe format

Encoding

Formato Descrizione

3g2	3gp2 format
3gp	3gp format
RoQ	Id RoQ format
ac3	raw ac3
adts	ADTS AAC
aiff	Audio IFF
alaw	pcm A law format
amr	3gpp amr file format
asf	asf format
asf_stream	asf format
au	SUN AU Format
avi	avi format
crc	crc testing format
dv	DV video format
dvd	MPEG2 PS format (DVD VOB)
ffm	ffm format
flac	raw flac
flv	flv format
framecrc	framecrc testing format
gif	GIF Animation
gxf	GXF format
h261	raw h261
h263	raw h263
h264	raw H264 video format
image2	image2 sequence
image2pipe	piped image2 sequence
libnut	nut format
m4v	raw MPEG4 video format
matroska	Matroska File Format
mjpeg	MJPEG video
mmf	mmf format
mov	mov format
mp2	MPEG audio layer 2
mp3	MPEG audio layer 3
mp4	mp4 format
mpeg	MPEG1 System format
mpeg1video	MPEG video
mpeg2video	MPEG2 video
mpegts	MPEG2 transport stream format
mpjpeg	Mime multipart JPEG format
mulaw	pcm mu law format
null	null video format
nut	nut format
ogg	Ogg format
psp	psp mp4 format
rawvideo	raw video format
rm	rm format
rtp	RTP output format
s16be	pcm signed 16 bit big endian format
s16le	pcm signed 16 bit little endian format
s8	pcm signed 8 bit format
svcd	MPEG2 PS format (VOB)
swf	Flash format
u16be	pcm unsigned 16 bit big endian format
u16le	pcm unsigned 16 bit little endian format
u8	pcm unsigned 8 bit format
vcd	MPEG1 System format (VCD)
vob	MPEG2 PS format (VOB)
voc	Creative Voice File format
wav	wav format
yuv4mpegpipe	YUV4MPEG pipe format

JAVE的使用非常简便，将包jave-1.0.jar导入工程路径即可。下面给出一段将AVI转换成FLV的代码片段：

File source = new File("source.avi");
File target = new File("target.flv");
AudioAttributes audio = new AudioAttributes();
audio.setCodec("libmp3lame");
audio.setBitRate(new Integer(64000));
audio.setChannels(new Integer(1));
audio.setSamplingRate(new Integer(22050));
VideoAttributes video = new VideoAttributes();
video.setCodec("flv");
video.setBitRate(new Integer(160000));
video.setFrameRate(new Integer(15));
video.setSize(new VideoSize(400, 300));
EncodingAttributes attrs = new EncodingAttributes();
attrs.setFormat("flv");
attrs.setAudioAttributes(audio);
attrs.setVideoAttributes(video);
Encoder encoder = new Encoder();
encoder.encode(source, target, attrs);

细心看这段代码，不难找到其中可以设置压缩码率、分辨率、音频解码率等参数，非常的简便。

JAVE工程网站：http://www.sauronsoftware.it/projects/jave/index.php

截至目前此项目最新版本是v1.0.2