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://blog.csdn.net/a358763471/article/details/38331121
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
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 if HAVE_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。
文件的大概内容请看:https://patches.videolan.org/patch/606/
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_API bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi ); LIBVLC_API bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi ); LIBVLC_API int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char *psz_filename ); LIBVLC_API int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi );2)在vlc/lib/media_player.c最后添加:
bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi ) { input_thread_t *p_input_thread; bool b_can_record; p_input_thread = libvlc_get_input_thread( p_mi ); if( !p_input_thread ) return false; b_can_record = var_GetBool( p_input_thread, "can-record" ); vlc_object_release( p_input_thread ); return b_can_record; } bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi ) { input_thread_t *p_input_thread; bool b_record; p_input_thread = libvlc_get_input_thread( p_mi ); if( !p_input_thread ) return false; b_record = var_GetBool( p_input_thread, "record" ); vlc_object_release( p_input_thread ); return b_record; } int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char* 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 ); return 0; } int libvlc_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 ); return 0; },ok修改完毕,重新sh compile.sh
3)在LibVLC.java中添加:
public native boolean takeSnapShot( int num, String file, int width, int height); public native boolean videoRecordStart(String path); public native boolean videoRecordStop(); public native boolean videoIsRecording(); public native boolean videoIsRecordable(); public native int getState(); public boolean takeSnapShot(String file, int width, int height) { return takeSnapShot(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#