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ffmpeg stream decoding - artefacts when not using ffplay

18 décembre 2018, par Lucker10

I stream a video capture via RTP using libx264. For now, I just stream to localhost.
For watching the stream, I use the ffmpeg library. When I set the GOP size greater than 1 (only I frames), I get artefacts on the receiver side . The strange thing is, when I use ffplay, the image is perfect . What am I doing wrong ?

Settings for encoding

output_codec_ctx->bit_rate = 5000000;

output_codec_ctx->width = 1920;

output_codec_ctx->height = 1080;

output_codec_ctx->time_base.den = 30; // frames per second

output_codec_ctx->time_base.num = 1;

output_codec_ctx->gop_size = 10; // gop size

output_codec_ctx->max_b_frames = 0; // B frames

output_codec_ctx->pix_fmt = AV_PIX_FMT_YUV420P; // output pixel format

output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;



av_opt_set(output_codec_ctx->priv_data, "preset", "ultrafast", 0);

av_opt_set(output_codec_ctx->priv_data, "tune", "zerolatency", 0);

Code for decoding

AVFormatContext *pFormatCtx;

AVCodecContext *input_codec_ctx;

AVCode *pCodec;

avdevice_register_all(); // for device

avformat_network_init();

pFormatCtx = avformat_alloc_context();

input_codec_ctx = avcodec_alloc_context3(nullptr);

AVDictionary *options = nullptr;

av_dict_set(&amp;options, "protocol_whitelist", "file,udp,rtp", 0);

av_dict_set(&amp;options, "fflags", "nobuffer",0);



avformat_open_input(&amp;pFormatCtx, "rtp://127.0.0.1:49990", nullptr, &amp;options);



avformat_find_stream_info(pFormatCtx, nullptr);

for (uint i = 0; i &lt; pFormatCtx->nb_streams; i++)

 {

   if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)

   {

     videoStream = static_cast<int>(i);

     break;

   }



 }



av_read_play(pFormatCtx);    //play stream

pCodec = avcodec_find_decoder(pFormatCtx->streams[videoStream]->codecpar->codec_id);

AVCodecParameters *codec_param = pFormatCtx->streams[videoStream]->codecpar;

avcodec_parameters_to_context(input_codec_ctx, codec_param);

avcodec_open2(input_codec_ctx, pCodec, nullptr);



AVPacket packet;

AVPacket *pkt  = &amp;packet;

AVFrame *frame;

frame = av_frame_alloc();



av_init_packet(pkt);

pkt->data = nullptr;    // packet data will be allocated by the encoder

pkt->size = 0;



while(true){

    av_read_frame(pFormatCtx,pkt);

    avcodec_send_packet(input_codec_ctx,pkt);

    avcodec_receive_frame(input_codec_ctx,frame);

}

</int>

Initialization and stuff omitted. Console output for custom decoding :

NULL @ 0x1fb7b80] Opening 'stream.sdp' for reading

[sdp @ 0x1fb7b80] Format sdp probed with size=2048 and score=50

[sdp @ 0x1fb7b80] video codec set to: h264

[sdp @ 0x1fb7b80] RTP Packetization Mode: 1

[udp @ 0x1f34140] end receive buffer size reported is 131072

[udp @ 0x1fb8e40] end receive buffer size reported is 131072

[sdp @ 0x1fb7b80] setting jitter buffer size to 500



 Success !

[sdp @ 0x1fb7b80] Before avformat_find_stream_info() pos: 181 bytes read:181 seeks:0 nb_streams:1

[AVBSFContext @ 0x1fa5880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[AVBSFContext @ 0x1fa5880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] Format yuv420p chosen by get_format().

[h264 @ 0x1fa51c0] Reinit context to 1920x1088, pix_fmt: yuv420p

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 57 packets

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] Invalid level prefix

[h264 @ 0x1fa51c0] error while decoding MB 2 36

[h264 @ 0x1fa51c0] concealing 3887 DC, 3887 AC, 3887 MV errors in I frame

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 155 packets

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] corrupted macroblock 32 41 (total_coeff=-1)

[h264 @ 0x1fa51c0] error while decoding MB 32 41

[h264 @ 0x1fa51c0] concealing 3257 DC, 3257 AC, 3257 MV errors in I frame

[h264 @ 0x1fa51c0] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1fa51c0] nal_unit_type: 5(IDR), nal_ref_idc: 3

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 52 packets

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 51 packets

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 10 packets

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 50 packets

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 52 packets

[sdp @ 0x1fb7b80] All info found

[sdp @ 0x1fb7b80] After avformat_find_stream_info() pos: 181 bytes read:181 seeks:0 frames:28

found video stream 



The number of elements in stream is  1 



[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] Format yuv420p chosen by get_format().

[h264 @ 0x1ee3880] Reinit context to 1920x1088, pix_fmt: yuv420p

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 256 packets

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] Invalid level prefix

[h264 @ 0x1ee3880] error while decoding MB 119 41

[h264 @ 0x1ee3880] concealing 3170 DC, 3170 AC, 3170 MV errors in I frame

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 5 packets

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 4 packets

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] out of range intra chroma pred mode

[h264 @ 0x1ee3880] error while decoding MB 100 56

[h264 @ 0x1ee3880] corrupted macroblock 84 65 (total_coeff=-1)

[h264 @ 0x1ee3880] error while decoding MB 84 65

[h264 @ 0x1ee3880] concealing 754 DC, 754 AC, 754 MV errors in I frame

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 160 packets

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] corrupted macroblock 17 36 (total_coeff=-1)

[h264 @ 0x1ee3880] error while decoding MB 17 36

[h264 @ 0x1ee3880] concealing 3872 DC, 3872 AC, 3872 MV errors in I frame

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[sdp @ 0x1fb7b80] max delay reached. need to consume packet

[sdp @ 0x1fb7b80] RTP: missed 53 packets

[h264 @ 0x1ee3880] nal_unit_type: 7(SPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 8(PPS), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] nal_unit_type: 5(IDR), nal_ref_idc: 3

[h264 @ 0x1ee3880] corrupted macroblock 62 39 (total_coeff=-1)

[h264 @ 0x1ee3880] error while decoding MB 62 39

[h264 @ 0x1ee3880] concealing 3467 DC, 3467 AC, 3467 MV errors in I frame

1 | ... | 3768 | 3769 | 3770 | 3771 | 3772 | 3773 | 3774 | 3775 | 3776 | ... | 4516

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