cc1: error: unrecognized command line option "-fforce-mem" make[2]: *** [version.lo] Error 1 make[2]: Leaving directory `/arm/madplay/libs/libmad-0.15.1b'' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/arm/madplay/libs/libmad-0.15.1b'' make: *** [all] Error 2 |
./configure --prefix=$PWD/../output/arm_linux --cc=arm-linux-gcc --ar=arm-linux-ar \ --ranlib=arm-linux-ranlib --disable-gui \ --target=arm-armv4-linux --host-cc=gcc --disable-freetype\ --enable-fbdev --disable-mencoder --disable-sdl --disable-live --disable-dvdread \ --disable-libdvdcss-internal --disable-x11 --enable-cross-compile --disable-mp3lib \ --enable-mad --with-extraincdir="$PWD/../output/arm_linux/include " --with-extralibdir="$PWD/../output/arm_linux/lib " \ --disable-dvdnav --disable-dvdread-internal --disable-jpeg --disable-tga \ --disable-dvbhead --disable-pnm --disable-tv --disable-ivtv \ --disable-fontconfig --disable-xanim --disable-win32dll --disable-armv5te --disable-armv6 |
- MPlayer不支持常见的--host来修改编译工具前缀.必须用--cc,--ar,--ranlib这样参数来修改.而且交叉编译 --enable-cross-compile 是必须的.
- --disable-gui 关闭图形界面,只采用字符界面控制
- --disable-mp3lib是关闭默认的MP3解码库,--enable-mad 是使用libmad支持.
- --disable-dvbhead --disable-dvdread --disable-dvdnav --disable-dvdread-internal 都是跟DVD相关库,基本版可以不用安装.
- --disable-x11 --enable-fbdev 关闭X11视频输出,打开framebuffer支持.ARM开发板必须的.
- --enable-static 如果使用静态编译尺寸大约是8M,动态编译是6M多,这样可能是无论哪种编译方式,mplayer都把自带的解码库链接到自身,多出2M应该是系统标准库的尺寸。
2.编译:
如果有编译错误,修改源码
- 在某一些编译器下,会提示找不到intptr_t定义,如果是这样 libavcodec/bitstream.h:181行 ,加入如下语句.
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否则会产生如下编译错误,intptr_t在标准C中有定义,但在这里死活找不到,因此直接定义:
arm-linux-gcc -I../libswscale -I../libavcodec -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_ISOC9X_SOURCE -I.. -I.. -I../libavutil -Wdisabled-optimization -Wno-pointer-sign -Wdeclaration-after-statement -I. -I.. -I../libavutil -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -O4 -pipe -ffast-math -fomit-frame-pointer -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -DHAVE_CONFIG_H -I/usr/X11R6/include -c -o cyuv.o cyuv.c cc1: warning: include location "/usr/X11R6/include" is unsafe for cross-compilation In file included from mpegvideo.h:32, from cyuv.c:38: bitstream.h: In function ''put_bits'': bitstream.h:233: error: ''intptr_t'' undeclared (first use in this function) bitstream.h:233: error: (Each undeclared identifier is reported only once bitstream.h:233: error: for each function it appears in.) bitstream.h:233: error: expected '')'' before ''s'' bitstream.h: In function ''init_get_bits'': bitstream.h:777: error: ''intptr_t'' undeclared (first use in this function) bitstream.h:777: error: expected '')'' before ''buffer'' bitstream.h:778: error: expected '')'' before ''buffer'' make[1]: *** [cyuv.o] Error 1 |
- 去掉ARM pld指令的支持
修改源码 libavcodec\armv4l\dsputil_arm_s.S, libmpeg2\motion_comp_arm_s.S
在其开始的加入,这段代码意思是定义一个空的ARM汇编宏 pld,这样当代码出现pld指令,就变成一条空指令
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pld指令只在armv5te以上版本有效,在2440(armv4l)无效.必须取消掉,这个指令的格式是
预读取PLD指令 功能:cache预读取(PLD,PreLoad),使用PLD指示存储系统从后面几条指令所指定的存储器地址读取,存储系统可使用这种方法加速以后的存储器访问。 格式: |
如果不取消,将会产生如下错误
arm-linux-gcc -I../libswscale -I../libavcodec -DHAVE_AV_CONFIG_H -D_FILE_OFFSET _BITS=64 -D_LARGEFILE_SOURCE -D_ISOC9X_SOURCE -I.. -I.. -I../libavutil -Wdisable d-optimization -Wno-pointer-sign -Wdeclaration-after-statement -I. -I.. -I../lib avutil -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -O4 -pipe -ffast-ma th -fomit-frame-pointer -D_REENTRANT -DHAVE_CONFIG_H -I/home/workspace/MPlayer/M Player-1.0rc2/../output/linux_arm/include -I/usr/X11R6/include -c -o armv4l/dsp util_arm_s.o armv4l/dsputil_arm_s.S cc1: warning: include location "/usr/X11R6/include" is unsafe for cross-compilat ion armv4l/dsputil_arm_s.S: Assembler messages: armv4l/dsputil_arm_s.S:79: Error: selected processor does not support `pld [r1]'' armv4l/dsputil_arm_s.S:90: Error: selected processor does not support `pld [r1]'' armv4l/dsputil_arm_s.S:100: Error: selected processor does not support `pld [r1] '' armv4l/dsputil_arm_s.S:111: Error: selected processor does not support `pld [r1] '' armv4l/dsputil_arm_s.S:122: Error: selected processor does not support `pld [r1] '' armv4l/dsputil_arm_s.S:141: Error: selected processor does not support `pld [r1] |
make
修改make install的bug
执行make install时会提示
install -m 755 -s mplayer /home/hxy/MPlayer/ MPlayer-1.0rc2/../output/arm_linux/bin strip: Unable to recognise the format of the input file `/home/hxy/MPlayer/MPlayer-1.0rc2/../output/arm_linux/bin/mplayer' |
查资料看install带-s 参数时会自动调用strip来strip应用程序。但是arm编译时要调用arm-linux-strip才有正确处理。解决办法是取消-s参数,查看Makefile可以发现-s是如下
$(INSTALL) -m 755 $(INSTALLSTRIP) mplayer$(EXESUF) $(BINDIR)
的INSTALLSTRIP设置的,它默认是-s,因此只要简单在Makefile的前面(95行)加入
INSTALLSTRIP := #将其置为空即可惟
4.执行:
export LD_LIBRARY_PATH=${LIB};./mplayer -ac mad demo.mpg
其中$LIB是保存有Mplayer所需的库的路径 -ac mad 是必须,表示强制用libmad解码.
这是我的成功执行一段脚本:
export APP_ROOT=/mnt/nfs/MPlayer/output/arm_linux export LD_LIBRARY_PATH=$APP_ROOT,OOT/lib;./mplayer -ac mad 2.mpg
测试mpg,avi,mp3,mp4均可播放,默认是按视频的原始分辨率播放的。如果想让MPlayer完整在LCD上显示,可以用video filter 参数 scale来设置
./mplayer -vf scale=240:320
另外有人测试发现在有一些开发板下.Mplayer播放后,输出会干扰后续shell的执行行.用下面比较长的参数一般没事
export APP_ROOT=/mnt/nfs/MPlayer/output/arm_linux export LD_LIBRARY_PATH=$APP_ROOT,OOT/lib;./mplayer -ac mad 2.mpg -quiet \
-vf scale=320:240 2>&1 1>/dev/null &&
如果搞不清自己分辩率的,可在MPlayer用 -fullscreen参数 .或者执行busybox shell命令fbset查看自n己板的分辩率