Hi,
From looking at a few places, mplayer & xine. I see that
0x2000 type for audio is ac3 in avi. I am having problems
with the API in getting an ac3 file to mux with a video
stream.
Basically I am doing something like this;
InputAC3Stream.open(InputAC3Filename.c_str());
const int rate = 48000;
const int channels = 5;
WAVEFORMATEX fmt;
memset(&fmt, 0, sizeof(WAVEFORMATEX));
fmt.wFormatTag = 0x2000;
fmt.nChannels = channels;
fmt.nSamplesPerSec = rate;
fmt.nAvgBytesPerSec = rate * channels;
fmt.nBlockAlign = channels;
fmt.wBitsPerSample = 16;
fmt.cbSize = sizeof(WAVEFORMATEX);
OutputAStream = OutputStream->AddStream(
AviStream::Audio, (char*)&fmt, sizeof(WAVEFORMATEX),
fmt.wFormatTag, fmt.nAvgBytesPerSec, fmt.nBlockAlign);
double tmp = (channels * rate * 1.0)/ VideoFrameRate;
AudioToReadPerFrame = (long)(tmp);
AudioBuffer = new (unsigned char)[ AudioToReadPerFrame ];
then per frame I do;
ExposeFrame();
if( AudioBuffer && InputAC3Stream )
{
InputAC3Stream.read( AudioBuffer, AudioToReadPerFrame );
OutputAStream->AddChunk(
(const char*) AudioBuffer,
(unsigned int)InputAC3Stream.gcount(), 0 );
}
though xine really doesn't like the final file and no ac3.
Any thoughts ?
--
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It's the question, http://witme.sourceforge.net
If you think education is expensive, try ignorance.
-- Derek Bok, president of Harvard
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