Hello, I try to extract raw audio frames from an audio file, using the following example: http://ffmpeg.org/doxygen/3.4/decode_audio_8c-example.html
As far as I understand, I get these frames in the decode() function, in the frame->data array. That said, I need to convert the frames into floats between -1 and 1. Here is what I tried (in my test, dataSize == 4): // here is where I want to get my frame: float myFrame; // first try: memcpy(&myFrame, &frame->data[ch][i], dataSize * sizeof(uint8_t)); // second try: myFrame = (frame->data[ch][i]<<0) | (frame->data[ch][i + 1]<<8) | (frame->data[ch][i + 2]<<16) | (frame->data[ch][i + 3]<<24); // third try: myFrame = (frame->data[ch][i + 3]<<0) | (frame->data[ch][i + 2]<<8) | (frame->data[ch][i + 1]<<16) | (frame->data[ch][i]<<24); But the problem is; it doesn't work, all I got so far is some kind of white noice. So what is the proper way to extract audio frames and convert them to float amplitudes? Thanks for your help.
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