这里讲的是vlc-android截屏以及录像功能的实现,如果单纯想编译vlc-android的源码请移步至:http://www.voidcn.com/article/p-dujwaxcs-pn.html
1、首先按照上面编译文档的流程配置好ubuntu下的android环境;
2、安装好一大堆工具:
sudo apt-get install ant autoconf automake autopoint cmake gawk gcc g++ libtool m4 patch pkg-config ragel subversion yasm git
切换vlc android 版本到 0.1.x-bugfix(这一步不要忘记,一开始忘记了导致重新下了一次源码)
cd android
git branch -r
git checkout 0.1.x-bugfix
3、修改部分文件:
1)android/configure.sh进行修改 删掉其中的-disable-sout
2) 另外保存图片为png格式,需要让ffmpeg增加-enable-encoder=png的编码器(在android/vlc/contrib/src/ffmpeg/rules.mak中修改)
有一行:
else
FFMPEGCONF += --disable-encoders --disable-muxers
改成FFMPEGCONF += --disable-encoders --enable-encoder=png--disable-muxers
4、编译源码:直接在android目录执行 sh compile.sh
编译过程中不知道为啥遇到好几次停顿,每次都是touch **;反正不是报错,没管它继续重新执行sh compile.sh。
最后报错了:../vlc/android/modules/.libs/libvorbis_plugin.a(libvorbis_plugin_la-vorbis.o): in function OpenEncoder:../../modules/codec/vorbis.c:758: error: undefined reference to 'vorbis_encode_setup_vbr‘
解决办法:将下面的红色部分修改
修改vlc-android/jni/Android.mk
LOCAL_LDLIBS := -L$(VLC_CONTRIB)/lib \
$(VLC_MODULES) \
$(VLC_BUILD_DIR)/lib/.libs/libvlc.a \
$(VLC_BUILD_DIR)/src/.libs/libvlccore.a \
$(VLC_BUILD_DIR)/compat/.libs/libcompat.a \
-ldl -lz -lm -llog \
-ldvbpsi -lebml -lmatroska -ltag \
-logg -lFLAC -ltheora -lvorbis -lvorbisfile -lvorbisenc \
-lmpeg2 -la52 \
-lavformat -lavcodec -lswscale -lavutil -lpostproc -lgsm -lopenjpeg \
-lliveMedia -lUsageEnvironment -lBasicUsageEnvironment -lgroupsock \
-lspeex -lspeexdsp \
-lxml2 -lpng -lgnutls -lgcrypt -lgpg-error \
-lnettle -lhogweed -lgmp \
-lfreetype -liconv -lass -lfribidi -lopus \
-lEGL -lGLESv2 -ljpeg \
$(CPP_STATIC)
在
-logg -lFLAC -ltheora -lvorbis
后添加
-lvorbisfile -lvorbisenc
继续编译,结果有报错了:
error: undefined reference to 'vlc_entry__access_output_udp' 出现这个错误,修改一下/vlc/modules/access_output目录下的 Modules.am 文件就可以编译过了。
修改方法:将下面的红色部分修改(晕死,红色都加不上,加上代码就变了,大家自己对比哪里不同吧,添加了两行,注释了三行)
SOURCES_access_output_dummy = dummy.c
SOURCES_access_output_file = file.c
SOURCES_access_output_udp = udp.c
SOURCES_access_output_http = http.c bonjour.c bonjour.h
SOURCES_access_output_shout = shout.c
access_output_LTLIBRARIES += \
libaccess_output_dummy_plugin.la \
libaccess_output_file_plugin.la \
libaccess_output_udp_plugin.la \
libaccess_output_http_plugin.la
#libaccess_output_udp_plugin_la_SOURCES = udp.c
#libaccess_output_udp_plugin_la_LIBADD = $(SOCKET_LIBS) $(LIBPTHREAD)
#access_output_LTLIBRARIES += libaccess_output_udp_plugin.la
libaccess_output_livehttp_plugin_la_SOURCES = livehttp.c
libaccess_output_livehttp_plugin_la_CFLAGS = $(AM_CFLAGS) $(GCRYPT_CFLAGS)
libaccess_output_livehttp_plugin_la_LIBADD = $(GCRYPT_LIBS) -lgpg-error
ifHAVE_GCRYPT
access_output_LTLIBRARIES += libaccess_output_livehttp_plugin.la
endif
ok,到这里问题解决可以成功编译源码了。最后的库文件在vlc-android/libs/arm**中
5、添加截屏以及录像功能代码(这一步可以在第四步编译的时候就加上):
8月1日更新
其实需要修改的文件不只是下面这两个,最好能够看懂patch文件,自行添加patch包,也就是打补丁。
8月1日更新结束
1)修改vlc/include/vlc/libvlc_media_player.h,在文件最后两行:
/** @} audio */
/** @} media_player */
之间添加代码:
LIBVLC_APIboollibvlc_media_player_is_recordable( libvlc_media_player_t *p_mi );
LIBVLC_API boollibvlc_media_player_is_recording( libvlc_media_player_t *p_mi );
LIBVLC_API intlibvlc_media_player_record_start( libvlc_media_player_t *p_mi,constchar*psz_filename );
LIBVLC_API intlibvlc_media_player_record_stop( libvlc_media_player_t *p_mi );
2)在vlc/lib/media_player.c最后添加:
boollibvlc_media_player_is_recordable( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
boolb_can_record;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
returnfalse;
b_can_record = var_GetBool( p_input_thread, "can-record");
vlc_object_release( p_input_thread );
returnb_can_record;
}
boollibvlc_media_player_is_recording( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
boolb_record;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
returnfalse;
b_record = var_GetBool( p_input_thread, "record");
vlc_object_release( p_input_thread );
returnb_record;
}
intlibvlc_media_player_record_start( libvlc_media_player_t *p_mi,constchar* psz_filename )
{
input_thread_t *p_input_thread;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return-1;
var_SetString( p_input_thread, "input-record-path", psz_filename );
var_SetBool( p_input_thread, "record",true);
vlc_object_release( p_input_thread );
return0;
}
intlibvlc_media_player_record_stop( libvlc_media_player_t *p_mi )
{
input_thread_t *p_input_thread;
p_input_thread = libvlc_get_input_thread( p_mi );
if( !p_input_thread )
return-1;
var_SetBool( p_input_thread, "record",false);
vlc_object_release( p_input_thread );
return0;
}
,ok修改完毕,重新sh compile.sh
3)在LibVLC.java中添加:
publicnativebooleantakeSnapShot(intnum, String file,intwidth,intheight);
publicnativebooleanvideoRecordStart(String path);
publicnativebooleanvideoRecordStop();
publicnativebooleanvideoIsRecording();
publicnativebooleanvideoIsRecordable();
publicnativeintgetState();
publicbooleantakeSnapShot(String file,intwidth,intheight) {
returntakeSnapShot(0, file, width, height);
}
即可调用java接口takeSnapShot实现截屏功能了,录像功能的接口:viceoRecordStart,videoRecordStop。
很快就可以编译出最新的库文件。到这里便实现了截屏跟录像的功能。给一个最后截屏跟录像的实例吧:
下载链接:费了老大劲才传上去,注意下载后源码要自己修改成适合自己的url,(这里测试的是rtsp的)http://download.csdn.net/detail/a358763471/7702397
本文参考文章:
http://blog.csdn.net/vertx/article/details/8559385#