No. I get the same data that I send to decoder. Not the uncompressed data (pcm) as output. In my case single frame in a single AV packet size. This I checked using a while loop that compares the packet size.
Regards Aboo On 11 January 2017 at 14:23, He Lei <[email protected]> wrote: > do you say ,you write same packet to decoder, and get frame more then in > packet? > look at anntation as avcodec_decode_audio4（）； > that is： > > 4643 * Some decoders may support multiple frames in a single AVPacket. > Such > > 4644 * decoders would then just decode the first frame and the return > value would be > > 4645 * less than the packet size. In this case, avcodec_decode_audio4 has > to be > > 4646 * called again with an AVPacket containing the remaining data in > order to > > 4647 * decode the second frame, etc... Even if no frames are returned, > the packet > > 4648 * needs to be fed to the decoder with remaining data until it is > completely > > 4649 * consumed or an error occurs. > > 4650 * > > good luck > 发自我的 iPhone > > 在 2017年1月11日，20:08，Aboobeker Sidhik Koyamparambil mammu < > [email protected]> 写道： > > Dear All, > > I am trying to decode opus. When I use both methods > avcodec_decode_audio4 and (avcodec_send_packet /avcodec_receive_frame) . I > am receiving the same opus packet that I send for decoding. I got this by > using the packet size of the decoded frame. Packet size is same as the > input opus packet size. > > I followed the decoding example given in github of ffmpeg. Please help me. > Why I am receiving same packet as input? > > > av_register_all(); > avcodec_register_all(); > AVCodec *codec; > AVCodecContext *c = NULL; > AVPacket avpkt; > AVFrame *decoded_frame = NULL; > av_init_packet(&avpkt); > codec = avcodec_find_decoder(AV_CODEC_ID_OPUS); > if (!codec) { > printf("Codec not found\n"); > exit(1); > } > c = avcodec_alloc_context3(codec); > if (!c) { > printf("Could not allocate audio codec context\n"); > exit(1); > } > /* put sample parameters */ > c->sample_rate = 48000; > c->request_sample_fmt = AV_SAMPLE_FMT_FLT; > c->channels = 2; > /* open it */ > if (avcodec_open2(c, codec, NULL) < 0) { > printf("Could not open codec\n"); > exit(1); > } > > AVPacket avpkt; > AVFrame *decoded_frame = NULL; > av_init_packet(&avpkt); > avpkt.data = Buffer; // Buffer is packet data here > avpkt.size = len; // length of the packet > int i, ch; > > if (!decoded_frame) { > if (!(decoded_frame = av_frame_alloc())) { > RELAY_SERVER_PRINT("Could not allocate audio frame\n"); > exit(1); > } > } > int ret; > int got_frame = 0; > ret = avcodec_decode_audio4(client_sockt_num_1->c, decoded_frame, &got_frame, > &avpkt); > if (ret < 0) { > fprintf(stderr, "Error decoding audio frame (%s)\n", av_err2str(ret)); > return ret; > } > printf("length %i\n", decoded_frame->pkt_size); > > > -- > Kind Regards > > Aboobeker Sidhik > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > > -- Kind Regards Aboobeker Sidhik
_______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
