在Blogger beta也可以Read More...

很多人都有寫，
不過我覺的angelo的教學是寫的最清楚的！

轉mpeg1

mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=vcd -vf scale=320:-2,harddup -srate 44100 -af lavcresample=44100 -lavcopts vcodec=mpeg1video:keyint=18:vrc_buf_size=327:vrc_minrate=1152:vbitrate=1152:vrc_maxrate=1152:acodec=mp2:abitrate=224 -ofps 30000/1001 -o movie_vcd.mpg input.mpg

Gamma, bias and gain

gamma:

float gamma(float val, gam){
return pow(val, 1 / gam);
}

bias:

float bias (float x, val){
return (val > 0) ? pow(x,log(val) / log(0.5)) : 0;
}

gain:

float gain (float x, val ) {
return 0.5 * ((x < 0.5) ? bias (2*x, 1-val): (2 - bias(2-2*x,1-val)));
}

Link: rendermanacademy

Mount CUE/BIN in Linux

Convert CUE/BIN to iso.
Install bchunk

bchunk foo.bin foo.cue foo

`AM_PROG_AS' not found

set automake version

ACLOCAL=aclocal-1.8 AUTOMAKE=automake-1.8 autoreconf -f -i -s

FFmpeg compile error

Replace transpose4x4() in libavcodec/i386/dsputil_mmx.c as follows:

static inline void transpose4x4(uint8_t *dst, uint8_t *src, int dst_stride, int src_stride){
asm volatile( //FIXME could save 1 instruction if done as 8x4 ...
"movd %4, %%mm0 \n\t"
"movd %5, %%mm1 \n\t"
"movd %6, %%mm2 \n\t"
"movd %7, %%mm3 \n\t"
"punpcklbw %%mm1, %%mm0 \n\t"
"punpcklbw %%mm3, %%mm2 \n\t"
"movq %%mm0, %%mm1 \n\t"
"punpcklwd %%mm2, %%mm0 \n\t"
"punpckhwd %%mm2, %%mm1 \n\t"
"movd %%mm0, %0 \n\t"
"punpckhdq %%mm0, %%mm0 \n\t"
"movd %%mm0, %1 \n\t"
"movd %%mm1, %2 \n\t"
"punpckhdq %%mm1, %%mm1 \n\t"
"movd %%mm1, %3 \n\t"

: "=m" (*(uint32_t*)(dst + 0*dst_stride)),
"=m" (*(uint32_t*)(dst + 1*dst_stride)),
"=m" (*(uint32_t*)(dst + 2*dst_stride)),
"=m" (*(uint32_t*)(dst + 3*dst_stride))
: "m" (*(uint32_t*)(src + 0*src_stride)),
"m" (*(uint32_t*)(src + 1*src_stride)),
"m" (*(uint32_t*)(src + 2*src_stride)),
"m" (*(uint32_t*)(src + 3*src_stride))
);
}