[Libav-user] encoding_decoding

Georg georgsteinbacher at gmx.net
Mon Aug 17 11:51:10 CEST 2015


I am working with the libav-examples at the moment. 
My plan is to encode an audio file to AAC directly decode it and playing it
with libao
So i edited the "Audio encoding example" from the libav/examples

But while decoding I get the error: get_buffer() failed

Here is what I added to the example:

/* encode the samples */
        pkt.data = NULL; // packet data will be allocated by the encoder
        pkt.size = 0;
        ret = avcodec_encode_audio2(c, &pkt, frame, &got_output);

        if (ret < 0) 
            fprintf(stderr, "error encoding audio frame\n");
        if (got_output) 
            int len = 0;
            avpkt.data = pkt.data;
	avpkt.size = pkt.size;
			if (!decoded_frame) 
				if (!(decoded_frame = av_frame_alloc())) 
					fprintf(stderr, "out of memory\n");

            len = avcodec_decode_audio4(c2, decoded_frame, &got_frame,
			if (len < 0) 
				fprintf(stderr, "Error while decoding\n");
			if (got_frame) 
				//output with ao

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