Error when decode AAC with avcodec_decode_audio4()

Question

I\'m trying to decode AAC with FFmpeg native decoder and encountered an error

SSR is not implemeted. Update your FFmpeg version to newest from Git. If the            


        

Answer 1

f = fopen(filename, "rb");
if (!f) {
    fprintf(stderr, "Could not open %s\n", filename);
    return;
}
outfile = fopen(outfilename, "wb");
if (!outfile) {
    av_free(pCodecCtx);
    return;
}

/* decode until eof */
avpkt.data = inbuf;
avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);

while (avpkt.size > 0) {
    int i, ch;
    int got_frame = 0;

Yeah, that's not going to work. You can't dump raw bytes from some random muxing format (potentially mp4) into a decoder and expect it to work. Use av_read_frame() to read individual audio packets from the muxing format, and feed the resulting AVPacket into the decoder using avcodec_decode_audio4(). See e.g. the dranger api tutorial. I know api-example.c uses the above code, but that unfortunately only works for a very limited subset of cases. Also see the detailed description in the API docs.