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本文鏈接：https://blog.csdn.net/Tosonw/article/details/89509356
概要：

vlc編譯, 硬解基于libva庫(kù)(VAAPI), live555(liblivemedia-dev), --enable-live555才能播放rtsp流, 基于liveMedia庫(kù), vlc對(duì)ffmpeg是運(yùn)行時(shí)依賴,把libavcodec_plugin.so刪了就可以。
ps：

重點(diǎn)章節(jié)：
“二、VLC編譯與安裝” ：
“1.依賴相關(guān)”
“2.VLC編譯”
“4.vainfo”
該章節(jié)是我親自編譯的記錄，基于Ubuntu 16.04。
另外，本來(lái)想用intel核顯解碼，但可惜libva庫(kù)的VAAPI驅(qū)動(dòng)一直未調(diào)通。
一、VLC中GPU解碼簡(jiǎn)介

參考：（https://wiki.videolan.org/VLC_VAAPI/）
1.VLC基于libva庫(kù)（VAAPI）：

一個(gè)開(kāi)源庫(kù)和API規(guī)范，可以訪問(wèn)圖形硬件加速功能以進(jìn)行視頻處理。它由一個(gè)主庫(kù)和每個(gè)支持的硬件供應(yīng)商的特定于驅(qū)動(dòng)程序的加速后端組成。
另請(qǐng)參閱：VLC GPU解碼：https://wiki.videolan.org/VLC_GPU_Decoding/
在某些情況下，VLC框架可以使用您的圖形卡（也稱為GPU）來(lái)解碼H.264流（錯(cuò)誤地稱為HD視頻）。
VLC在其模塊化方法及其轉(zhuǎn)碼/流媒體功能中，僅在解碼階段在GPU中進(jìn)行解碼，然后將數(shù)據(jù)恢復(fù)到其他階段（流式傳輸，過(guò)濾或插入任何視頻輸出）。
這意味著，與其他一些實(shí)現(xiàn)相比，VLC中的GPU解碼速度較慢，因?yàn)樗枰獜腉PU獲取數(shù)據(jù)。 但您可以將任何視頻輸出（接收器）插入其中并使用所有VLC視頻過(guò)濾器。
2.VAAPI的介紹

此頁(yè)面是關(guān)于在Linux上支持GPU加速的VLC編譯。
這個(gè)howto由Jean-Baptiste Kempf編寫(xiě)并使用nVidia GPU進(jìn)行測(cè)試。
vaapi：https://www.freedesktop.org/wiki/Software/vaapi/
在Linux / X11上，有兩個(gè)用于硬件視頻解碼的競(jìng)爭(zhēng)接口：
來(lái)自Intel的VA-API，和來(lái)自NVIDIA的VDPAU。
通常，VAAPI用于Intel和Broadcom圖形卡，而VDPAU用于AMD / ATI和NVIDIA卡。
VA-API：

在Ubuntu發(fā)行版上，首先安裝硬件支持包：i965-va-driver，libva-intel-vaapi-driver和vainfo，然后在Preferences→Input＆Codecs中激活GPU硬件加速。

??? $ sudo apt-get install i965-va-driver libva-intel-vaapi-driver vainfo

VDPAU：

自VLC版本2.1.0起，VDPAU支持解碼，自VLC 2.2.0起支持后處理和渲染（截至2013年底仍處于開(kāi)發(fā)階段）。
默認(rèn)情況下，VLC版本2.2.0以后將自動(dòng)啟用VDPAU。
有關(guān)技術(shù)詳細(xì)信息，請(qǐng)參閱http://www.remlab.net/op/vlc-vdpau.shtml。
3.在編譯vlc之前保證以下正確安裝

安裝libva（注：We do not support other libraries than the one from Mr Beauchesne.）
https://github.com/intel/libva （https://www.freedesktop.org/wiki/Software/vaapi/）
nvidia驅(qū)動(dòng)（注：Use at least version 0.6.2 ）
ATI（注：Use at least 0.6.4.）

#檢查是否正確配置了libva環(huán)境變量：
$ set | grep LIBVA
#應(yīng)輸出如下內(nèi)容：
LIBVA_DRIVER_NAME=xvba
LIBVA_DRIVERS_PATH=/usr/lib64/va/drivers
#如果沒(méi)有，請(qǐng)根據(jù)庫(kù)路徑將這些添加到系統(tǒng)環(huán)境變量（/etc/environment ？）


VLC基于FFmpeg插件。
FFmpeg: https://github.com/FFmpeg/FFmpeg

./configure --enable-gpl --enable-postproc --prefix=/path/to/ --enable-shared --enable-vaapi
make -j12
make install
#將vaapi.h復(fù)制到includes


二、VLC編譯與安裝
1.依賴相關(guān)

sudo apt install libva-dev
sudo apt -y install libvdpau-dev
sudo apt -y install vdpau-va-driver
sudo apt -y install vdpauinfo
sudo apt -y install libavcodec-dev
sudo apt -y install libvdpau-va-gl1
sudo apt install libdrm-dev
sudo apt-get install autoconf automake libtool //運(yùn)行autogen.sh用
sudo apt-get install libffi-dev
sudo apt-get install libx11-dev libxext-dev libxfixes-dev
sudo apt install libxcb-dev //提供X window protocol access
sudo apt install libpciaccess-dev //提供PCI access


以下是我在實(shí)際編譯的時(shí)候仍然缺少的，和異常的依賴項(xiàng)：

sudo apt install -y libmad-ocaml-dev
sudo apt install -y libgstreamer-ocaml-dev
sudo apt install -y liba52-0.7.4
sudo apt install -y liba52-0.7.4-dev
sudo apt install -y libxcb-composite0-dev
sudo apt install -y libxcb-xv0-dev
sudo apt install -y libxcb-randr0-dev
sudo apt install -y libxcb-keysyms1-dev
sudo apt install -y wayland-protocols
sudo apt install -y libalsa-ocaml-dev
sudo apt install -y libxcb-xkb-dev
sudo apt install -y libsidplay2-dev
sudo apt install -y libogg-dev
sudo apt install -y libdca-dev
sudo apt install -y libflac-dev
sudo apt install -y libmpeg2-4-dev
sudo apt install -y libvorbis-dev
sudo apt install -y libspeex-dev
sudo apt install -y libtheora-dev
sudo apt install -y libfreetype6-dev
sudo apt install -y libcaca-dev
sudo apt install -y libncursesw5-dev
sudo apt install libbluray-dev
sudo apt install -y libssh2-1-dev
sudo apt install -y libvncserver-dev
sudo apt install -y libfreerdp-dev
sudo apt install libdvbpsi-dev
sudo apt install -y libpulse-dev
sudo apt install -y libcddb2-dev
sudo apt install -y libdbus-1-dev
sudo apt install -y libsystemd-dev
sudo apt install -y libsmbclient-dev

# 版本太高，configure: error: libavutil versions 55 and later are not supported.
#sudo apt purge libavutil-dev
#sudo apt purge libavutil-ffmpeg54

# 依賴問(wèn)題：configure: error: Could not find the LUA byte compiler.
# 可以在編譯時(shí)使用--disable-lua。或者安裝lua，如下：
sudo apt install liblua5.2-dev
sudo apt install liblua50-dev
sudo apt install liblualib50-dev

# 編譯問(wèn)題：yacc: command not found
sudo apt install byacc

# ERROR: flex is not installed.
sudo apt install flex

# ERROR: GNU bison is not installed.
sudo apt install bison

# configure: error: No package 'Qt5Core' found
# No package 'Qt5Widgets' found
# No package 'Qt5Gui' found
# No package 'Qt5Quick' found
# No package 'Qt5QuickWidgets' found
# No package 'Qt5QuickControls2' found
# No package 'Qt5Svg' found. If you want to build VLC without GUI, pass --disable-qt.
# 對(duì)上述問(wèn)題，我使用的是：$ ./configure --disable-qt
# 也可以參考下面一句，自行安裝：（我好像這樣試過(guò)，然而不行）
sudo apt install -y qt5-default qtcreator libqt5svg5-dev

# configure: error: Skins2 interface requires FreeType, libxpm, libxext and libxinerama
sudo apt install -y libfreetype6 libfreetype6-dev libxpm-dev libxext-dev libxinerama-dev

# Makefile:1806: recipe for target 'lua/intf/modules/httprequests.luac' failed
# make[2]: *** [lua/intf/modules/httprequests.luac] Error 1
#?? LUAC?? lua/intf/telnet.luac
sudo apt install -y liblua5.1-0-dev liblua5.1-bitop-dev liblua5.1-rrd-dev liblua5.2-dev liblua5.3-dev
sudo apt install -y lua5.1-policy-dev
sudo apt install -y libghc-hslua-dev libluabind-dev libluajit-5.1-dev libtexlua52-dev libtexluajit-dev
sudo apt install -y libtolua++5.1-dev libtolua-dev lua-ansicolors-dev lua-apr-dev lua-bit32-dev lua-cjson-dev
sudo apt install -y lua-cliargs-dev lua-curl-dev lua-curses-dev lua-cyrussasl-dev lua-dbi-mysql-dev
sudo apt install -y lua-dbi-postgresql-dev lua-dbi-sqlite3-dev lua-discount-dev lua-dkjson-dev
sudo apt install -y lua-event-dev lua-expat-dev lua-filesystem-dev lua-iconv-dev lua-ldap-dev lua-leg-dev
sudo apt install -y lua-lemock-dev lua-lgi-dev lua-lpeg-dev lua-lpty-dev lua-luassert-dev lua-md5-dev
sudo apt install -y lua-mediator-dev lua-messagepack-dev lua-penlight-dev lua-posix-dev lua-redis-dev
sudo apt install -y lua-rex-gnu-dev lua-rex-onig-dev lua-rex-pcre-dev lua-rex-posix-dev lua-rex-tre-dev
sudo apt install -y lua-rings-dev lua-rrd-dev lua-say-dev lua-sec-dev lua-socket-dev lua-sql-mysql-dev
sudo apt install -y lua-sql-postgres-dev lua-sql-sqlite3-dev lua-svn-dev lua-term-dev lua-uri-dev
sudo apt install -y lua-wsapi-fcgi-dev lua-yaml-dev lua-zip-dev lua-zlib-dev


需要–enable-live555才能播放rtsp流，基于liveMedia庫(kù)。
注意：不要用apt直接安裝live555（liblivemedia-dev），我剛開(kāi)始就這樣操作，導(dǎo)致vlc打開(kāi)rtsp時(shí)出現(xiàn)段錯(cuò)誤。
手動(dòng)下載live555編譯安裝后，手動(dòng)建立文件（索引包）：/usr/lib/x86_64-linux-gnu/pkgconfig/live555.pc

sudo vim /usr/lib/x86_64-linux-gnu/pkgconfig/live555.pc


寫(xiě)入如下內(nèi)容：（注：路徑根據(jù)自己的系統(tǒng)，自行修改）

prefix=/usr/local
libdir=/usr/local/lib #庫(kù)路徑目錄，注：源碼編譯出來(lái)的庫(kù)是.la庫(kù)。
includedir=${prefix}/include #安裝的頭文件的目錄
Name: live555
Description: multimedia RTSP streaming library
Version: 2016.02.09
Cflags: -I${includedir}/liveMedia -I${includedir}/groupsock -I${includedir}/BasicUsageEnvironment -I${includedir}/UsageEnvironment
Libs: -L${libdir} -lliveMedia -lgroupsock -lBasicUsageEnvironment -lUsageEnvironment


2.VLC編譯

源碼編譯：

??? 下載vlc-3.0.6-20190114-0223.tar.xz：http://nightlies.videolan.org/build/source/
??? 我是在Git下載的：https://github.com/videolan/vlc
??? （并且使用的是就是最新代碼編譯通過(guò)的：4.0.0-dev-7527-g6a4f370）

或者直接下載現(xiàn)成的軟件應(yīng)用：

??? Ubuntu軟件管理中心：搜索vlc，點(diǎn)擊安裝。參考：https://wiki.videolan.org/Configure/
??? 然后將安裝路徑下的庫(kù)取出來(lái)直接用。

依賴項(xiàng)（有點(diǎn)多。。。）
注：除了前面的“1.依賴相關(guān)”里安裝的依賴項(xiàng)之外，這里我也同樣操作過(guò)下面的命令，安裝了以下依賴項(xiàng)：
sudo apt-get install libvorbis-dev libogg-dev libtheora-dev speex libspeex-dev flac libflac-dev x264 libx264-dev a52-0.7.4 liba52-0.7.4-dev mpeg2dec libmpeg2-4-dev faad libfaad-dev faac libfaac-dev lame libmp3lame-dev libavdevice-dev libmad0 libmad0-dev libschroedinger-dev libebml-dev libdca-dev twolame libtwolame-dev libmpcdec-dev libvorbisidec1 libvorbisidec-dev libass-dev libmatroska-dev libdvbpsi-dev libmodplug1 libmodplug-dev libshout3 libshout3-dev libdvdread4 libdvdnav4 libdvdnav-dev livemedia-utils liblivemedia-dev libcddb2 libcddb2-dev libcdio13 libcdio-dev libxcb-composite0-dev libcdio-utils vcdimager libvcdinfo0 libvcdinfo-dev libgpg-error0 libgpg-error-dev libgcrypt11-dev gnutls-bin libgnutls-dev libdap-bin libdap-dev libxml2 libxml2-dev libpng12-0 libpng12-dev libjpeg8 libtiff5 libsdl1.2-dev libsdl-image1.2 libsdl-image1.2-dev libc-bin gettext libfreetype6 libfreetype6-dev libfribidi-dev libfribidi0 zlib1g zlib1g-dev libtag1-dev libcaca0 libcaca-dev caca-utils libqt4-dev libportaudio2 libupnp-dev libupnp6 libexpat1 libexpat1-dev yasm libxcb-xv0 libxcb-xv0-dev libx11-xcb1 libx11-xcb-dev liblua5.2-dev libswscale-dev
編譯：

# 源碼clone
git clone https://github.com/videolan/vlc.git

# 查看版本信息
git log

# 根據(jù)需要，可以更新到指定release版本：
#例vlc-4.0.0:
#git checkout 1f2e534f3033aab9dd31442f7b3956728b62b3d3
#例vlc-3.0.0:
#git checkout 8d432b090e08f141ce9156dc728afbed4636301b

# 開(kāi)始編譯（注：備注:要支持播放rtsp流,必須enable live。要能打印debug,也要enable debug選項(xiàng)。）
./bootstrap
mkdir build; cd build
#../configure --disable-lua --disable-qt --enable-live555 --enable-debug? --enable-x264
../configure --enable-avcodec --enable-avformat --enable-swscale --enable-mad --enable-a52 --enable-libmpeg2 --enable-faad --enable-vorbis --enable-ogg --enable-theora --enable-freetype --enable-fribidi --enable-speex --enable-flac --enable-live555 --enable-caca --enable-alsa --enable-ncurses --enable-debug --enable-x264 --disable-lua --disable-qt --enable-dsm --enable-dvbpsi --enable-dvdnav --enable-dvdread --enable-bluray --enable-nfs --enable-pulse --enable-freerdp --enable-sftp --enable-vnc --enable-run-as-root --enable-archive --enable-dc1394 --enable-dv1394 --enable-smbclient
sudo make -j12 #或者 ./compile
sudo make install


啟動(dòng)VLC：

#直接在命令行上：
vlc --ffmpeg-hw #hw:硬解? sw:軟解
#其實(shí)可以直接啟動(dòng)：
vlc
#Exemple: on playback log output (with -v debug and ATI VAAPI)
[0x7f8c4cc03ba8] avcodec decoder: Using VA API version 0.32 for hardware decoding.


以下“3.”“4.”“5.”節(jié)，與VLC硬解相關(guān)
3.libva-2.1.1編譯安裝

#依賴
$ sudo apt install -y libc6 libdrm-intel1 libdrm2 libva-x11-1 libva1 multiarch-support
#源碼
$ git clone https://github.com/intel/libva.git
$ cd libva
#編譯
$ sudo ./autogen.sh -with-drivers-path=/usr/lib/x86_64-linux-gnu/dri
$ sudo make -j12
$ sudo make install


4.vainfo

vainfo工具用于查看libva庫(kù)調(diào)用信息。

$ sudo apt install vainfo
$ vainfo
# 將會(huì)輸出一些調(diào)用信息
libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit


vainfo支持調(diào)用nvidia顯卡，但需要先安裝nvidia_video驅(qū)動(dòng)：

$ sudo apt install vdpau-va-driver
#查看庫(kù)文件
$ ll /usr/lib/x86_64-linux-gnu/dri/
#將查看到有個(gè)nvidia_drv_video.so文件
lrwxrwxrwx?? 1 root root?????? 18 4月?? 7? 2016 nvidia_drv_video.so -> vdpau_drv_video.so
#此時(shí)使用vainfo查看調(diào)用情況
$ vainfo
libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'nvidia'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/nvidia_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.39 (libva 1.7.0)
vainfo: Driver version: Splitted-Desktop Systems VDPAU backend for VA-API - 0.7.4
vainfo: Supported profile and entrypoints
????? VAProfileMPEG2Simple??????????? :?? ?VAEntrypointVLD
????? VAProfileMPEG2Main????????????? :?? ?VAEntrypointVLD
????? VAProfileMPEG4Simple??????????? :?? ?VAEntrypointVLD
????? VAProfileMPEG4AdvancedSimple??? :?? ?VAEntrypointVLD
????? VAProfileH264Baseline?????????? :?? ?VAEntrypointVLD
????? VAProfileH264Main?????????????? :?? ?VAEntrypointVLD
????? VAProfileH264High?????????????? :?? ?VAEntrypointVLD
????? VAProfileVC1Simple????????????? :?? ?VAEntrypointVLD
????? VAProfileVC1Main??????????????? :?? ?VAEntrypointVLD
????? VAProfileVC1Advanced??????????? :?? ?VAEntrypointVLD


vainfo支持調(diào)用intel核顯，但需要先安裝i965-va-driver驅(qū)動(dòng)：
（但是我的i965-va-driver庫(kù)調(diào)用一直是下面的問(wèn)題，無(wú)法解決。）

#查看是否安裝了驅(qū)動(dòng)
$ apt list i965-va-driver
Listing... Done
i965-va-driver/xenial,now 1.7.0-1 amd64 [installed,automatic]
#如果沒(méi)有安裝，則進(jìn)行安裝
$ sudo apt install -y i965-va-driver

#此時(shí)使用vainfo查看調(diào)用情況（注：要先將libva調(diào)用庫(kù)改為i965，即intel的VAAPI庫(kù)。）
$ export LIBVA_DRIVER_NAME=i965
$ vainfo
libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_39
vainfo: intel_driver.c:100: intel_driver_init: Assertion `(((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_DRI1)) || (((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_DRI2)) || (((struct drm_state *)(ctx)->drm_state)->auth_type == (VA_DRM_AUTH_CUSTOM))' failed.
Aborted (core dumped)


可能是直接使用apt安裝存在支持問(wèn)題，于是嘗試自己編譯intel的vaapi驅(qū)動(dòng)：

$ sudo apt-get install libx11-dev libtool libdrm-dev build-essential autoconf libva-dev
$ git clone https://github.com/intel/intel-vaapi-driver.git
$ cd intel-vaapi-driver/
$ ./autogen.sh
#此時(shí)存在一些依賴項(xiàng)的版本問(wèn)題：
#configure: error: Package requirements (libva >= 1.4.0) were not met:
#Requested 'libva >= 1.4.0' but version of libva is 1.3.0
$ git clone https://github.com/intel/libva.git
$ cd libva/
$ ./autogen.sh -with-drivers-path=/usr/lib/x86_64-linux-gnu/dri
$ make -j12
$ sudo make install
#完成后返回intel-vaapi-driver目錄，再次配置并編譯：
$ cd ../intel-vaapi-driver/
$ ./autogen.sh
#我在配置路徑的時(shí)候發(fā)現(xiàn)配置無(wú)用，路徑仍然是默認(rèn)的/usr/local/lib/dri/
#沒(méi)去深究，我繼續(xù)編譯安裝，最后手動(dòng)將/usr/local/lib/dri/i965_drv_video.so庫(kù)鏈接到/usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
#后來(lái)發(fā)現(xiàn)是libva必須要先修改安裝路徑，然后intel-vaapi-driver的修改才能起作用
$ ./configure --prefix=/usr/lib/x86_64-linux-gnu/dri/
$ make -j12
$ sudo make install
#$ sudo ln -s /usr/local/lib/dri/i965_drv_video.so /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
#$ sudo ln -s /usr/local/lib/dri/i965_drv_video.la /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.la


此時(shí)使用vainfo查看調(diào)用情況，這次異常不一樣了，似乎是某函數(shù)問(wèn)題：

$ vainfo
libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva error: /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so has no function __vaDriverInit_0_32
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit


我在GitHub上有找到類似的問(wèn)題，但并不能解決我這出現(xiàn)的情況，后來(lái)提了issue：https://github.com/intel/intel-vaapi-driver/issues/455

繼續(xù)嘗試，經(jīng)過(guò)仔細(xì)考慮懷疑是這些驅(qū)動(dòng)的版本兼容問(wèn)題，比如我查到的大部分人們的版本為：libva info: VA-API version 0.34.0，而我的是0.39.0。
經(jīng)查詢：0.34.0對(duì)應(yīng)的libva版本是1.2.1，所以下載對(duì)應(yīng)版本：https://github.com/intel/libva/archive/libva-1.2.1.tar.gz
解壓后進(jìn)入目錄，進(jìn)行編譯安裝：

$ ./autogen.sh -with-drivers-path=/usr/lib/x86_64-linux-gnu/dri
$ make -j12
$ sudo make install
#完成后使用vainfo查看
$ vainfo
libva info: VA-API version 0.34.0
libva info: va_getDriverName() returns 0
libva info: User requested driver 'i965'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva error: /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so has no function __vaDriverInit_0_32
libva info: va_openDriver() returns -1
vaInitialize failed with error code -1 (unknown libva error),exit
#可以看到VA-API版本已經(jīng)為0.34.0了，接下來(lái)重新編譯intel-vaapi-driver
$ cd intel-vaapi-driver
$ ./autogen.sh
#會(huì)出現(xiàn)錯(cuò)誤：
configure: error: Package requirements (libva >= 1.4.0) were not met:
Requested 'libva >= 1.4.0' but version of libva is 0.34.0


我們的intel-vaapi-driver也應(yīng)該使用舊版本，經(jīng)檢查應(yīng)該使用：intel-vaapi-driver_1.2.1版本。下載：https://github.com/intel/intel-vaapi-driver/archive/1.2.1.tar.gz
解壓后進(jìn)入目錄，進(jìn)行編譯安裝：

$ cd ../intel-vaapi-driver-1.2.1/
$ ./autogen.sh
$ make -j12


但是編譯出現(xiàn)了錯(cuò)誤，問(wèn)題可能出在源碼里吧，因?yàn)樾掳姹揪幾g都正常，`
只可惜新版本運(yùn)行有問(wèn)題，舊版本又編譯不過(guò)。

Traceback (most recent call last):
? File "../../gpp.py", line 200, in
??? writeblocks(outfile, blocks)
? File "../../gpp.py", line 168, in writeblocks
??? do_writeblock(block, [])
? File "../../gpp.py", line 161, in do_writeblock
??? while check_cond(block.param_op, for_curs[0], block.param_limit):
? File "../../gpp.py", line 138, in check_cond
??? assert type(cur) == int
AssertionError
make[5]: Leaving directory '/home/toson/soft/intel-vaapi-driver-1.2.0/src/shaders/post_processing/gen5_6'
Makefile:376: recipe for target 'all-recursive' failed
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory '/home/toson/soft/intel-vaapi-driver-1.2.0/src/shaders/post_processing'
Makefile:377: recipe for target 'all-recursive' failed
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory '/home/toson/soft/intel-vaapi-driver-1.2.0/src/shaders'
Makefile:941: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/toson/soft/intel-vaapi-driver-1.2.0/src'
Makefile:533: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/toson/soft/intel-vaapi-driver-1.2.0/src'
Makefile:410: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1


5.檢查版本

#查看libva版本
dpkg-query --showformat='${Package}: ${Version}\n' --show | grep libva
#查看vainfo版本
dpkg-query --showformat='${Package}: ${Version}\n' --show | grep vainfo
#查看i965版本
dpkg-query --showformat='${Package}: ${Version}\n' --show | grep i965


例：（我運(yùn)行的結(jié)果）

# List installed libva packages
$ dpkg-query --showformat='${Package}: ${Version}\n' --show | grep libva
libva-dev: 1.7.0-1ubuntu0.1
libva-drm1: 1.7.0-1ubuntu0.1
libva-egl1: 1.7.0-1ubuntu0.1
libva-glx1: 1.7.0-1ubuntu0.1
libva-tpi1: 1.7.0-1ubuntu0.1
libva-wayland1: 1.7.0-1ubuntu0.1
libva-x11-1: 1.7.0-1ubuntu0.1
libva1: 1.7.0-1ubuntu0.1
libva1: 1.7.0-1ubuntu0.1
# The vainfo installed
$ dpkg-query --showformat='${Package}: ${Version}\n' --show | grep vainfo
vainfo: 1.7.0-1ubuntu0.1
# List installed i915 Intel VAAPI driver
$ dpkg-query --showformat='${Package}: ${Version}\n' --show | grep i965
i965-va-driver: 1.7.0-1


6.我在編譯VLC時(shí)問(wèn)過(guò)的問(wèn)題
依賴庫(kù)編譯與調(diào)用：

Toson_桐：有誰(shuí)知道編譯vlc的時(shí)候怎樣讓它不依賴ffmpeg的那些解碼模塊?
不斷電的夢(mèng)：依不依賴是代碼調(diào)用時(shí)決定的, 不是編譯時(shí)決定的.
Toson_桐：編譯時(shí)可以加編譯參數(shù)“–disable-***”，但是沒(méi)有–disable-ffmpeg這個(gè)
Toson_桐：vlc是不是必須依賴ffmpeg
爨纛鼟：那你得自己編ffmpeg禁用那些模塊 然后再編vlc 鏈你自己編的那版ffmpeg
爨纛鼟：@Toson_桐 你直接把libavcodec_plugin.so刪了就行
爨纛鼟：vlc對(duì)ffmpeg是運(yùn)行時(shí)依賴 你把插件一刪就沒(méi)有了
爨纛鼟：ffmpeg的解碼器比較全面 我不知道你為什么要禁用它 但是我告訴你可以通過(guò)運(yùn)行時(shí)參數(shù)指定使用哪個(gè)解碼器 如果你要自己寫(xiě)一個(gè)解碼器 可以把分?jǐn)?shù)設(shè)得比f(wàn)fmpeg高 這樣會(huì)優(yōu)先找你的
Toson_桐：@爨纛鼟 厲害了！，問(wèn)一下禁用ffmpeg會(huì)不會(huì)vlc對(duì)某些編碼格式就不支持了
爨纛鼟：肯定的啊
Toson_桐：我主要想看vlc自己的解碼能力，做個(gè)對(duì)比
爨纛鼟： libvlc什么功能都沒(méi)有 vlc所有的功能都是插件提供的
爨纛鼟：libvlccore是插件加載器 libvlc實(shí)現(xiàn)音視頻播放邏輯和負(fù)責(zé)線程調(diào)度
Toson_桐：我明白了，vlc依賴的x264也是它的插件了，我是解碼相機(jī)的H264格式視頻流，我可以跳過(guò)vlc直接使用底下的插件庫(kù)，應(yīng)該可以達(dá)到快速解碼吧
Toson_桐：現(xiàn)在我這掛載20多個(gè)攝像頭之后，cpu資源全耗光了
Eric：牛逼
Toson_桐：聽(tīng)說(shuō)vlc解碼效果好，就來(lái)研究
爨纛鼟：用硬編硬解 你有顯卡沒(méi)有
Toson_桐：剛開(kāi)始就想用核顯，linux上編譯，一直沒(méi)調(diào)通。獨(dú)顯倒是能用，不過(guò)獨(dú)顯都拿去跑模型用了
爨纛鼟：跑模型跟編解碼不是同一塊核心
爨纛鼟：跑模型用的是cuda核心 編碼是nvenc 解碼是cuvid
三、VLC代碼

參考雷霄驊文檔：https://blog.csdn.net/leixiaohua1020/article/details/42363079
流程圖中包含了3個(gè)結(jié)構(gòu)體：

libvlc_instance_t：代表一個(gè)libVLC的實(shí)例。
libvlc_media_t：代表一個(gè)可以播放的媒體。
libvlc_media_player_t：代表一個(gè)VLC媒體播放器（一個(gè)視頻播放器播放一個(gè)視頻）。注意VLC并不僅僅用于媒體播放。


創(chuàng)建或者以上3個(gè)結(jié)構(gòu)體通過(guò)以下6個(gè)函數(shù)：

libvlc_new()：創(chuàng)建libvlc_instance_t。
libvlc_media_new_path()：創(chuàng)建libvlc_media_t。
libvlc_media_player_new_from_media()：創(chuàng)建libvlc_media_player_t。
libvlc_media_player_release()：釋放libvlc_media_player_t
libvlc_media_release()：釋放libvlc_media_t。
libvlc_release()：釋放libvlc_instance_t。


可以通過(guò)下面的函數(shù)控制媒體的播放或者暫停：

這些函數(shù)都需要使用libvlc_media_player_t作為參數(shù)。這里處于簡(jiǎn)化的目的，只使用了播放和停止函數(shù)。

libvlc_media_player_play()：播放。
libvlc_media_player_pause()：暫停。
libvlc_media_player_stop()：停止。


獲取視頻的時(shí)長(zhǎng)，寬，高等信息：

在libVLC中可以通過(guò)如下等函數(shù)獲取。

libvlc_media_player_get_length()
//libvlc_video_get_width()
//libvlc_video_get_height()
實(shí)測(cè)已經(jīng)沒(méi)有上述2個(gè)函數(shù)，以下面一個(gè)函數(shù)代替：
libvlc_video_get_size(mp, 0, &width, &height);


但是有一個(gè)很奇怪的現(xiàn)象：如果在調(diào)用完libvlc_media_player_play()之后，立即調(diào)用上述3個(gè)函數(shù)的話，返回的值都是0，只有“等待”一段時(shí)間（例如調(diào)用sleep()）后再調(diào)用上述函數(shù)，才能得到正確的數(shù)值。
四、例程

以下是我運(yùn)行過(guò)的程序，實(shí)現(xiàn)vlc代碼提取攝像機(jī)圖像：

//
// Created by toson on 19-4-15.
//
#include
#include
#include
#include
#include

#include "unistd.h"

using namespace std;
using namespace cv;

int IMG_WIDTH = 3840;//2592//1920;//1280//1280
int IMG_HEIGHT= 2160;//1520//1080;//960//720

namespace vlcreader_ns {

//#pragma comment(lib,"libvlc.so.5")
//#pragma comment(lib,"libvlccore.so.8")

??? class VLCReader
??? {
??? public:
??????? VLCReader(char* url = 0);
??????? ~VLCReader();
??????? void start(int wantW = IMG_WIDTH, int wantH = IMG_HEIGHT);
??????? void pause(bool paused);
??????? void ctrl(const char *psz_options);
??????? cv::Mat frame() { return img; }
??????? unsigned int w, h;

??? private:
??????? char* rtspAddress = "rtsp://admin:admin123@192.168.1.102:554/cam/realmonitor?channel=1&subtype=0";
??????? libvlc_instance_t *inst;
??????? libvlc_media_player_t *mp;
??????? unsigned char *pixel;
??????? cv::Mat img;
??????? libvlc_media_t *media;

??????? static void *cb_lock(void *opaque, void **plane);
??????? static void cb_unlock(void *opaque, void *picture, void * const *plane);
??????? static void cb_display(void *opaque, void *picture);
??????? unsigned char * updataSize();
??? };

??? VLCReader::VLCReader(char*url)
??????????? : inst(0), mp(0), pixel(0), w(0), h(0), rtspAddress(url)
??? {
??????? const char * vlc_args[] = {
??????????????? "--ipv4", //將會(huì)默認(rèn)為所有連接使用 IPv4。 (默認(rèn)關(guān)閉)
??????????????? "--no-prefer-system-codecs", //無(wú)論是否有可用的選擇都優(yōu)先使用您系統(tǒng)中的原生插件替代VLC自己的插件。 (默認(rèn)關(guān)閉)
??????????????? "--rtsp-caching=300", //延遲速度ms //允許您修改 RTSP 流的默認(rèn)緩存值。此值必須以毫秒為單位設(shè)置。
??????????????? "--network-caching=500", //設(shè)高可減少花屏 //遠(yuǎn)程文件額外增加的緩存值，以毫秒為單位。
??????????????? "--demux=h264", //去復(fù)用器被用于分離 "復(fù)合" 流 (類似音頻和視頻流)。
??????????????? "--rtsp-tcp", //--rtsp-host //--rtsp-tcp //使用 RTP over RTSP (TCP) (默認(rèn)關(guān)閉)
??????? };
??????? std::string rstp_str(rtspAddress);
??????? if (rstp_str.substr(0, 4) == "file")
??????? {
??????????? vlc_args[4] = "";
??????????? vlc_args[5] = "";
??????? }

??????? inst = libvlc_new(sizeof(vlc_args) / sizeof(vlc_args[0]), vlc_args);
??????? mp = libvlc_media_player_new(inst);

??????? libvlc_video_set_callbacks(mp, cb_lock, cb_unlock, cb_display, this);
??? }

??? VLCReader::~VLCReader()
??? {
??????? libvlc_media_player_stop(mp);
??????? libvlc_media_player_release(mp);
??????? libvlc_release(inst);
??? }

??? void VLCReader::start(int wantW, int wantH)
??? {
??????? libvlc_media_player_pause(mp);
??????? media = libvlc_media_new_location(inst, rtspAddress);
??????? libvlc_media_player_set_media(mp, media);
??????? libvlc_media_release(media);

??????? libvlc_video_set_format(mp, "RV24", wantW, wantH, wantW * 3);
??????? libvlc_media_player_play(mp);
??? }

??? void VLCReader::pause(bool paused)
??? {
??????? if (mp) {
??????????? libvlc_media_player_set_pause(mp, paused);
??????? }
??? }

??? unsigned char * VLCReader::updataSize()
??? {
??????? libvlc_video_get_size(mp, 0, &w, &h);
??????? //int w = libvlc_video_get_width(mp);
??????? //int h = libvlc_video_get_height(mp);
??????? if (!w || !h)
??????????? return 0;
??????? if (pixel && (this->w != w || this->h != h)) {
??????????? delete[] pixel;
??????????? pixel = 0;
??????? }
??????? if (!pixel) {
??????????? pixel = new unsigned char[w*h * 3];
??????????? this->w = w;
??????????? this->h = h;
??????? }
??????? return pixel;
??? }

??? void* VLCReader::cb_lock(void *opaque, void **plane)
??? {
??????? VLCReader *p = (VLCReader*)opaque;
??????? *plane = p->updataSize(); //tell VLC to put decoded data to this buffer
??????? return *plane;
??? }
??? void VLCReader::cb_unlock(void *opaque, void *picture, void * const *plane)
??? {
??????? VLCReader *p = (VLCReader*)opaque;
??????? unsigned char *pix = (unsigned char*)picture;
??????? if (pix) {
??????????? p->img = cv::Mat(p->h, p->w, CV_8UC3, pix);
??????? }
??? }
??? void VLCReader::cb_display(void *opaque, void *picture)
??? {
??????? VLCReader *p = (VLCReader*)opaque;
??????? if (!p->img.empty()) {
//??????????? cv::cvtColor(p->img, p->img, cv::COLOR_BGR2RGB);
//??????????? cv::namedWindow("1", CV_WINDOW_NORMAL);
//??????????? resize(p->img, p->img, Size(0,0), 0.5, 0.5, INTER_LINEAR);
??????????? cv::imshow("1", p->img);
??????????? cv::waitKey(1);
??????? }
??? }

??? void VLCReader::ctrl(const char *psz_options)
??? {
??????? libvlc_media_add_option(media, psz_options);
??? }
}
using namespace vlcreader_ns;

int main(int argc, char* argv[])
{
??? VLCReader vlc_reader("rtsp://admin:admin123@192.168.1.106:554/cam/realmonitor?channel=1&subtype=0");
//??? VLCReader vlc_reader("file:////home/toson/videos/BigBuckBunny_320x180.mp4");
??? vlc_reader.start();
??? sleep(3);
??? vlc_reader.pause(true); //暫停
??? sleep(3);
??? vlc_reader.pause(false);
??? sleep(3);
//??? vlc_reader.ctrl("-f"); //"--fullscreen"
??? sleep(3);
??? sleep(100);

??? return 0;
}

?
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版權(quán)聲明：本文為CSDN博主「Tosonw」的原創(chuàng)文章，遵循 CC 4.0 BY-SA 版權(quán)協(xié)議，轉(zhuǎn)載請(qǐng)附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/Tosonw/article/details/89509356