大家好，又见面了，我是全栈君。
简单介绍
Vlc for android是一款开源安卓播放器。具备播放多媒体文件、光盘、设备以及网络流媒体协议等功能，支持ARMv7 CPU或一个x86 CPU的设备，全部播放控制特性都已经开发完整。
以下将介绍怎样获代替码、编译、vlc原理、缩小延迟、加入截图和录制视频、多路播放等。
具体解释
1、获代替码
官网源代码下载：http://mirror.us.leaseweb.net/videolan/
git获取：clone from git://git.videolan.org/vlc-ports/android.git
补丁：https://patches.videolan.org/
2、编译
1、搭配环境 AndroidSDK：adt-bundle-linux-x86-20130522 JDK：jdk-7u25-linux-i586 NDK：android-ndk-r8e-linux-x86
2、安装工具 apt-get install gcc apt-get install g apt-get build-dep vlc apt-get install git apt-get install wget apt-get install autoconf apt-get install libtool apt-get install subversion apt-get install cmake apt-get install ant
3、配置信息
export ANDROID_NDK=/home/mythou/android-dev/android-ndk-r8eexport NDKR5C=/home/mythou/ndkr5cexport NDKR6B=/home/mythou/ndkr6bPATH=PATH:NDKR6B:
export ANDROID_ABI=armeabi-v7a
export JAVA_HOME=/home/mythou/android-dev/jdk/jdk1.7.0_25export JRE_HOME=/home/mythou/android-dev/jdk/jdk1.7.0_25/jreexport CLASSPATH=.:CLASSPATH:JAVA_HOME/lib:JAVA_HOME/jre/libexport ANT_HOME=/home/mythou/android-dev/apache-ant-1.8.0export PATH=JAVA_HOME/bin:JAVA_HOME/jre/bin:PATH:HOME/bin:ANT_HOME
export ANDROID_SDK=/home/mythou/android-dev/adt-bundle-linux-x86-20130522/sdkPATH=PATH:ANDROID_SDK/tools:
4、编译
sh compile.sh or sh compile.sh release
5、辅助库
因为某些原因，有些库无法获得。请手动下载放入便可。
3、vlc播放原理
视频播放的基本步骤： 1、acess 訪问（获取视频数据） 2、demux 解复用（音频、视频分离） 3、decode 解码（音频和视频的解码） 4、output 输出（音频和视频的输出（aout和vout）
如图：
4、缩小延迟
改动延迟的方法有两种：1、直接用Java代码实现；2、在vlc库中改动。
涉及延迟的參数有：file-caching（文件缓存）、live-caching（直播缓存）、network-caching（网络缓存）、sout-mux-caching（输出缓存）。
Java代码实现例如以下：
代码语言：javascript复制 options.add(":file-caching=1500");//文件缓存
options.add(":network-caching=1500");//网络缓存
options.add(":live-caching=1500");//直播缓存
options.add(":sout-mux-caching=1500");//输出缓存
options.add(":codec=mediacodec,iomx,all");vlc库实现例如以下：
查找目标文件vlc/src/libvlc-module.c 改动相应的參数
代码语言：javascript复制 add_integer( "file-caching", DEFAULT_PTS_DELAY / 3000,
CACHING_TEXT, CACHING_LONGTEXT, true )
add_integer( "live-caching", DEFAULT_PTS_DELAY / 3000,
CAPTURE_CACHING_TEXT, CAPTURE_CACHING_LONGTEXT, true )
add_integer( "network-caching", CLOCK_FREQ / 3000,
NETWORK_CACHING_TEXT, NETWORK_CACHING_LONGTEXT, true )
add_integer( "sout-mux-caching", 1000, SOUT_MUX_CACHING_TEXT,
SOUT_MUX_CACHING_LONGTEXT, true )把分母数据增大，缓存的数据就越小，延迟就降低，流畅性就降低，相反。分母数据降低，缓存的数据就越大，延迟就添加，流畅性就添加。
測试结果，延迟明显降低。
5、加入截图和录制视频
官方已给出补丁实现截图和录制视频
1、截图
改动文件： android/configure.sh 搜索内容 -disable-sout 并删除
改动文件：android/vlc/contrib/src/ffmpeg/rules.mak 添加-enable-encoder=png的编码器 实现png格式截图
代码语言：javascript复制FFMPEGCONF = --disable-encoders --disable-muxers
改成FFMPEGCONF = --disable-encoders --enable-encoder=png --disable-muxers源代码又一次编译便可
编译过程中可能会出现例如以下问题：
代码语言：javascript复制./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‘解决方法： 改动文件 vlc-android/jni/Android.mk
代码语言：javascript复制 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
后加入
-lvorbisfile -lvorbisenc error: undefined reference to 'vlc_entry__access_output_udp'解决方法： 改动文件： /vlc/modules/access_output/ Modules.am
代码语言：javascript复制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
内容覆盖便可相关源代码加入：
在libvlcjni.c中添加函数：
代码语言：javascript复制boolean Java_org_videolan_libvlc_LibVLC_takeSnapShot(JNIEnv *env, jobject thiz,jint number, jstring path, jint width,jint height)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
/* Get C string */
const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
if (mp)
if(libvlc_video_take_snapshot(mp, (int)number,psz_path , (int)width,(int)height)==0)
return JNI_TRUE;
return JNI_FALSE;
} LibVlc.java中添加native函数的接口和调用方法：
代码语言：javascript复制private native boolean takeSnapShot( int num, String file, int width, int height); public boolean takeSnapShot(String file, int width, int height) {
return takeSnapShot(0, file, width, height);
} 2、录制视频
录制补丁 https://patches.videolan.org/patch/606/
补丁内容例如以下：
代码语言：javascript复制diff --git a/include/vlc/libvlc_events.h b/include/vlc/libvlc_events.h
index 2cfedbf..25a16ea 100644
--- a/include/vlc/libvlc_events.h
b/include/vlc/libvlc_events.h
@@ -72,6 72,8 @@ enum libvlc_event_e {
libvlc_MediaPlayerSnapshotTaken,
libvlc_MediaPlayerLengthChanged,
libvlc_MediaPlayerVout,
libvlc_MediaPlayerRecordableChanged,
libvlc_MediaPlayerRecordingFinished,
libvlc_MediaListItemAdded=0x200,
libvlc_MediaListWillAddItem,
@@ -165,6 167,14 @@ typedef struct libvlc_event_t
} media_player_pausable_changed;
struct
{
int new_recordable;
} media_player_recordable_changed;
struct
{
char *psz_filename;
} media_player_recording_finished;
struct
{
int new_count;
} media_player_vout;
diff --git a/include/vlc/libvlc_media_player.h b/include/vlc/libvlc_media_player.h
index aefef02..8ddef37 100644
--- a/include/vlc/libvlc_media_player.h
b/include/vlc/libvlc_media_player.h
@@ -1628,6 1628,121 @@ LIBVLC_API int libvlc_audio_set_delay( libvlc_media_player_t *p_mi, int64_t i_de
/** @} audio */
/**
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释
* * Can the media player record the current media? * * Media must be buffering or playing before it can be recorded. * * The media player event manager will emit a libvlc_MediaPlayerRecordableChanged event * when the recordable state changes after starting media playback. The event data will * describe the new recordable state, so invocation of this API method is not strictly * necessary to determine when recording can be started. * * A libvlc_MediaPlayerRecordableChanged event will not be emitted if the media is * stopped (notified by a libvlc_MediaPlayerStoppedEvent) or finishes normally (notified * by a libvlc_MediaPlayerFinished event). * * A calling application should therefore register an event callback for those events * so that it may query the new recordable state and manage recording at the appropriate * time. * * param p_mi media player * return true if the media player can record, false if it can not * version LibVLC 2.1.0 or later */ LIBVLC_API bool libvlc_media_player_is_recordable( libvlc_media_player_t *p_mi ); /** * Is the current media being recorded? * * param p_mi media player * return true if recording, false if not * version LibVLC 2.1.0 or later */ LIBVLC_API bool libvlc_media_player_is_recording( libvlc_media_player_t *p_mi ); /** * Start recording the current media. * * Media must be buffering or playing before it can be recorded. A calling application * can begin recording immediately on receipt of a libvlc_MediaPlayerRecordableChanged * event sent via the media player event manager (if recording is possible for the * currently playing media), and any time thereafter until the media stops. * * Media will be saved to the file path denoted by the psz_filename parameter if it is * supplied. Any such supplied filename should not include a file extension as the * correct file extension will automatically be appended when the file is created. This * filename may denote a full path name, but each directory in the path must already * exist or recording will silently fail. If the calling application chooses to specify * the filename then it is the responsibility of that application to take account of * this and itself make sure any needed directories are created. * * Alternatively, a calling application need not supply a filename and so instead let * vlc automatically generate a unique filename. This will cause vlc to create a new * file in the appropriate media directory for the user - for example "~/Videos". The * actual filename used will be sent in an event when the recording is complete. * * When recording has finished and the new file has been completely saved, a * libvlc_MediaPlayerRecordingFinished event will be sent via the media player event * manager. The event data will contain the filename of the newly recorded file - this * will either be the filename as specified by the calling application or a filename * generated by vlc if the application did not supply a filename. In either case, this * filename will include the automatically appended file extension. * * The saved media file will not be immediately available or visible until recording * has completely finished and the libvlc_MediaPlayerRecordingFinished event has been * received, or the media has stopped or finished normally. * * Recording can be stopped and started on-the-fly once the recordable state is set; * each time recording is stopped and restarted a new file will be created so a calling * application should take care to provide unique filenames, or defer to vlc to create * unique filenames. * * Recording will be stopped when the media stops playing, and must be explicitly * started again to restart recording, i.e. the recording state is not automatically * preserved when playing media subsequently. * * Media player functionailty such as next/previous chapter, set time or position and * so on are ineffective when recording is enabled. However, pausing the media is * possible and will pause the recording; unpausing the media will resume playback and * recording. * * Recording of the primary media or sub-items is possible. * * param p_mi media player * param psz_filename name of the file to save the media to, not including any file extension, * or NULL if vlc should generate the filename automatically * return 0 if recording was started, -1 on error * version LibVLC 2.1.0 or later */ LIBVLC_API int libvlc_media_player_record_start( libvlc_media_player_t *p_mi, const char *psz_filename ); /** * Stop recording the current media. * * This method requests that the recording stop, and will return immediately. Recording * will not stop immediately. * * When the recording actually stops some short time later and the new file has * finished being written, a libvlc_MediaPlayerRecordingFinished event will be sent via * the media player event manager. The newly recorded file will not be visible or * available until after this event has been sent. * * The event data will contain the full name of the file that was created. The filename * will either be that as was specified by the calling application on invoking * libvlc_media_player_record_start(), or the filename that vlc automatically generated * if the calling application did not supply its own filename. In either case the * filename will contain the automatically appended file extension. * * There is no need to invoke this method to stop the recording if the media is stopped * or finishes playing normally. * * param p_mi media player * return 0 if recording was stopped, -1 on error * version LibVLC 2.1.0 or later */ LIBVLC_API int libvlc_media_player_record_stop( libvlc_media_player_t *p_mi ); /** @} media_player */ # ifdef __cplusplusdiff --git a/lib/event.c b/lib/event.cindex c71a48a..7ef4abd 100644--- a/lib/event.c b/lib/event.c@@ -279,6 279,8 @@ static const event_name_t event_list[] = { DEF(MediaPlayerSnapshotTaken) DEF(MediaPlayerLengthChanged) DEF(MediaPlayerVout) DEF(MediaPlayerRecordableChanged) DEF(MediaPlayerRecordingFinished) DEF(MediaListItemAdded) DEF(MediaListWillAddItem)diff --git a/lib/libvlc.sym b/lib/libvlc.symindex 42dad5c..3ff67ef 100644--- a/lib/libvlc.sym b/lib/libvlc.sym@@ -137,6 137,8 @@ libvlc_media_player_get_title libvlc_media_player_get_title_count libvlc_media_player_get_xwindow libvlc_media_player_has_vout libvlc_media_player_is_recordable libvlc_media_player_is_recording libvlc_media_player_is_seekable libvlc_media_player_is_playing libvlc_media_player_new@@ -146,6 148,8 @@ libvlc_media_player_set_pause libvlc_media_player_pause libvlc_media_player_play libvlc_media_player_previous_chapter libvlc_media_player_record_start libvlc_media_player_record_stop libvlc_media_player_release libvlc_media_player_retain libvlc_media_player_set_agldiff --git a/lib/media_player.c b/lib/media_player.cindex a41b8c7..6573197 100644--- a/lib/media_player.c b/lib/media_player.c@@ -64,6 64,10 @@ input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd, vlc_value_t oldval, vlc_value_t newval, void * p_userdata ); static int input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd, vlc_value_t oldval, vlc_value_t newval, void *p_userdata ); static int input_event_changed( vlc_object_t * p_this, char const * psz_cmd, vlc_value_t oldval, vlc_value_t newval, void * p_userdata );@@ -72,6 76,10 @@ static int snapshot_was_taken( vlc_object_t *p_this, char const *psz_cmd, vlc_value_t oldval, vlc_value_t newval, void *p_data ); static int file_recording_finished( vlc_object_t *p_this, char const *psz_cmd, vlc_value_t oldval, vlc_value_t newval, void *p_data ); static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi ); /*@@ -132,6 140,8 @@ static void release_input_thread( libvlc_media_player_t *p_mi, bool b_input_abor input_seekable_changed, p_mi ); var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi ); var_DelCallback( p_input_thread, "can-record", input_recordable_changed, p_mi ); var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi ); @@ -227,6 237,25 @@ input_pausable_changed( vlc_object_t * p_this, char const * psz_cmd, } static int input_recordable_changed( vlc_object_t *p_this, char const *psz_cmd, vlc_value_t oldval, vlc_value_t newval, void *p_userdata ) { VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); libvlc_media_player_t *p_mi = p_userdata; libvlc_event_t event; event.type = libvlc_MediaPlayerRecordableChanged; event.u.media_player_recordable_changed.new_recordable = newval.b_bool; libvlc_event_send( p_mi->p_event_manager, &event ); return VLC_SUCCESS; } static int input_event_changed( vlc_object_t * p_this, char const * psz_cmd, vlc_value_t oldval, vlc_value_t newval, void * p_userdata )@@ -357,6 386,23 @@ static int snapshot_was_taken(vlc_object_t *p_this, char const *psz_cmd, return VLC_SUCCESS; } static int file_recording_finished(vlc_object_t *p_this, char const *psz_cmd, vlc_value_t oldval, vlc_value_t newval, void *p_data ) { VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); libvlc_media_player_t *p_mi = p_data; libvlc_event_t event; event.type = libvlc_MediaPlayerRecordingFinished; event.u.media_player_recording_finished.psz_filename = newval.psz_string; libvlc_event_send(p_mi->p_event_manager, &event); return VLC_SUCCESS; } static input_thread_t *find_input (vlc_object_t *obj) { libvlc_media_player_t *mp = (libvlc_media_player_t *)obj;@@ -480,6 526,10 @@ libvlc_media_player_new( libvlc_instance_t *instance ) var_Create (mp, "amem-set-volume", VLC_VAR_ADDRESS); var_Create (mp, "amem-format", VLC_VAR_STRING | VLC_VAR_DOINHERIT); var_Create (mp, "amem-rate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT); var_Create (mp, "recording-finished", VLC_VAR_STRING); var_AddCallback (mp, "recording-finished", file_recording_finished, mp); var_Create (mp, "amem-channels", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT); mp->p_md = NULL;@@ -515,6 565,9 @@ libvlc_media_player_new( libvlc_instance_t *instance ) register_event(mp, TitleChanged); register_event(mp, PausableChanged); register_event(mp, RecordableChanged); register_event(mp, RecordingFinished); register_event(mp, Vout); /* Snapshot initialization */@@ -566,6 619,8 @@ static void libvlc_media_player_destroy( libvlc_media_player_t *p_mi ) var_DelCallback( p_mi->p_libvlc, "snapshot-file", snapshot_was_taken, p_mi ); var_DelCallback( p_mi, "recording-finished", file_recording_finished, p_mi ); /* No need for lock_input() because no other threads knows us anymore */ if( p_mi->input.p_thread ) release_input_thread(p_mi, true);@@ -732,12 787,14 @@ int libvlc_media_player_play( libvlc_media_player_t *p_mi ) var_AddCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi ); var_AddCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi ); var_AddCallback( p_input_thread, "can-record", input_recordable_changed, p_mi ); var_AddCallback( p_input_thread, "intf-event", input_event_changed, p_mi ); if( input_Start( p_input_thread ) ) { unlock_input(p_mi); var_DelCallback( p_input_thread, "intf-event", input_event_changed, p_mi ); var_DelCallback( p_input_thread, "can-record", input_recordable_changed, p_mi ); var_DelCallback( p_input_thread, "can-pause", input_pausable_changed, p_mi ); var_DelCallback( p_input_thread, "can-seek", input_seekable_changed, p_mi ); vlc_object_release( p_input_thread );@@ -1409,3 1466,62 @@ void libvlc_media_player_next_frame( libvlc_media_player_t *p_mi ) vlc_object_release( p_input_thread ); } } 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; }diff --git a/modules/stream_out/record.c b/modules/stream_out/record.cindex de6d32e..40ddfea 100644--- a/modules/stream_out/record.c b/modules/stream_out/record.c@@ -110,6 110,8 @@ struct sout_stream_sys_t int i_id; sout_stream_id_t **id; mtime_t i_dts_start; char *psz_record_file; }; static void OutputStart( sout_stream_t *p_stream );@@ -158,6 160,8 @@ static int Open( vlc_object_t *p_this ) p_sys->i_dts_start = 0; TAB_INIT( p_sys->i_id, p_sys->id ); p_sys->psz_record_file = NULL; return VLC_SUCCESS; } @@ -172,6 176,19 @@ static void Close( vlc_object_t * p_this ) if( p_sys->p_out ) sout_StreamChainDelete( p_sys->p_out, p_sys->p_out ); if( p_sys->psz_record_file ) { for( vlc_object_t *p_mp = p_stream->p_parent; p_mp; p_mp = p_mp->p_parent ) { if( var_Type( p_mp, "recording-finished" ) ) { var_SetString( p_mp, "recording-finished", p_sys->psz_record_file ); break; } } free( p_sys->psz_record_file ); } TAB_CLEAN( p_sys->i_id, p_sys->id ); free( p_sys->psz_prefix ); free( p_sys );@@ -352,7 369,10 @@ static int OutputNew( sout_stream_t *p_stream, } if( psz_file && psz_extension ) { p_sys->psz_record_file = strdup( psz_file ); var_SetString( p_stream->p_libvlc, "record-file", psz_file ); } free( psz_file ); free( psz_output );diff --git a/src/input/var.c b/src/input/var.cindex 9613fe2..04f33b9 100644--- a/src/input/var.c b/src/input/var.c@@ -210,6 210,9 @@ void input_ControlVarInit ( input_thread_t *p_input ) text.psz_string = _("Subtitles Track"); var_Change( p_input, "spu-es", VLC_VAR_SETTEXT, &text, NULL ); /* ES Out */ var_Create( p_input, "input-record-path", VLC_VAR_STRING | VLC_VAR_DOINHERIT ); /* Special read only objects variables for intf */ var_Create( p_input, "bookmarks", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
*/下载补丁，并把文件放到vlc文件夹中，运行命令patch -p1 < xxxx.patch。因为版本号不一样有些地方会失败。请打开补丁自己检查手动改动。
补丁中主要相关函数：
代码语言：javascript复制 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;
}库调用方法函数例如以下：
代码语言：javascript复制jboolean Java_org_videolan_libvlc_LibVLC_takeSnapShot(JNIEnv *env, jobject thiz,jint number, jstring path, jint width,jint height)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
/* Get C string */
const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
if (mp)
if(libvlc_video_take_snapshot(mp, (int)number,psz_path , (int)width,(int)height)==0)
return JNI_TRUE;
return JNI_FALSE;
}
jboolean Java_org_videolan_libvlc_LibVLC_videoRecordStart(JNIEnv *env, jobject thiz,jstring path)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
/* Get C string */
const char* psz_path = (*env)->GetStringUTFChars(env, path, &isCopy);
//const char* psz_filename=(*env)->GetStringUTFChars(env, filename, &isCopy);
if (mp)
if(libvlc_media_player_record_start(mp,psz_path)==0)
return JNI_TRUE;
return JNI_FALSE;
}
jboolean Java_org_videolan_libvlc_LibVLC_videoRecordStop(JNIEnv *env, jobject thiz)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
/* Get C string */
if (mp)
if(libvlc_media_player_record_stop(mp)==0)
return JNI_TRUE;
return JNI_FALSE;
}
jboolean Java_org_videolan_libvlc_LibVLC_videoIsRecording(JNIEnv *env, jobject thiz)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
if (mp)
if(libvlc_media_player_is_recording(mp))
return JNI_TRUE;
return JNI_FALSE;
}
jboolean Java_org_videolan_libvlc_LibVLC_videoIsRecordable(JNIEnv *env, jobject thiz)
{
jboolean isCopy;
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
if (mp)
if(libvlc_media_player_is_recordable(mp))
return JNI_TRUE;
return JNI_FALSE;
}
jint Java_org_videolan_libvlc_LibVLC_getState(JNIEnv *env, jobject thiz)
{
libvlc_media_player_t *mp = getMediaPlayer(env, thiz);
if (mp){
libvlc_state_t state=libvlc_media_player_get_state(mp);
return (jint)state;
}
else
return -1;
}6、实现多路播放
使用process属性实现
总结
接触vlc for android 是帮助朋友完毕一个外单，即实现认证播放器的封装（即加入播放网络视频的认证）。传地址便可播放。
经測试vlc无法播放swf文件，为了弥补这已缺陷，准备加入swfdec到android平台以支持swf文件。
推荐博客站点：http://flavienlaurent.com/
博客站点：http://flavienlaurent.com/
发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/115777.html原文链接：https://javaforall.cn
