Hi,
I'm trying to decode MPEG2 Subtitle in TS MPEG2 file.
There is no problem with an old version (02 december 2008) with rgba_palette
code in AVSubtitleRect. rgba_palette was an (uint32_t *) variable.
Since recent version, ffmpeg has included rgba_palette in (uint8_t *) in
data[1] table and we have got an 8 bits palette instead of 32 bits.
So, every subtitle are monocolors.
Is there something I have misunderstood or there is really a bug?
This is some code to introduce my problem:
// Main
// Decode subtitle frame
int nRes = avcodec_decode_subtitle(pCodecCtx, pSubtitle, &frameFinished,
packet.data, packet.size);
// Did we get a subtitle frame?
if(frameFinished != 0)
{
nSize = pSubtitle->num_rects;
for(i = 0; i < nSize; ++i)
{
int width = pSubtitle->rects[i].w;
int height = pSubtitle->rects[i].h;
SaveFrame(&pSubtitle->rects[i], width, height);
}
}
// Save
static void SaveFrame(AVSubtitleRect* pRect, int width, int height)
{
char szImagename[32];
sprintf(szImagename, "d:\\tmp\\ST\\frame%d.ppm", iFrame);
FILE* pImage=fopen(szImagename, "w");
int x, y, v;
for(y = 0; y < height; y++)
{
for(x = 0; x < width; x++)
{
// 20081202 version: v is uint32_t
v = pRect->rgba_palette[pRect->bitmap[y * width + x]];
// recent version: v is uint8_t
//v = pRect->pict.data[1][pRect->pict.data[0][y * width + x]];
putc((v >> 16) & 0xff, pImage);
putc((v >> 8) & 0xff, pImage);
putc((v >> 0) & 0xff, pImage);
}
}
}
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