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• AC3 decoding throws error number -16976906 ... vlc plays well

  23 décembre 2022, par user1940163

  I have got a mpeg ts file with following composition (shown by ffprobe)

  


  ffprobe version N-109444-geef763c705 Copyright (c) 2007-2022 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --enable-openssl
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 55.103 / 59. 55.103
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
[mpegts @ 0x56201c2c1cc0] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpegts, from 'ff_vlc.ts':
  Duration: 00:10:00.02, start: 1.400000, bitrate: 1839 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 856x480 [SAR 320:321 DAR 16:9], 30 fps, 59.94 tbr, 90k tbn
  Stream #0:1[0x101](spa): Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp


  


  ---

  


  I intend to transcode this so that I copy the video as it is but the audio will be encoded to aac ...so that I can play it in the browser.

  


  I use the following ffmpeg command to attempt that

  


  ffmpeg -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts


  


  this throws errors with -16976906 as follows..........( I have clipped the repetitive excessively long output)

  


  ffmpeg -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts
ffmpeg version N-109444-geef763c705 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --enable-openssl
  libavutil      57. 43.100 / 57. 43.100
  libavcodec     59. 55.103 / 59. 55.103
  libavformat    59. 34.102 / 59. 34.102
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 53.100 /  8. 53.100
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
[mpegts @ 0x55b4369b2440] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
Input #0, mpegts, from 'ff_vlc.ts':
  Duration: 00:10:00.02, start: 1.400000, bitrate: 1839 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 856x480 [SAR 320:321 DAR 16:9], 30 fps, 59.94 tbr, 90k tbn
  Stream #0:1[0x101](spa): Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 17065 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
....
....
....(repetitive output clipped and removed)
....
....
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
    Last message repeated 2 times
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Error while decoding stream #0:1: Error number -16976906 occurred
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
Too many packets buffered for output stream 0:0.
Error submitting a packet to the muxer for output stream #0:0.
[abuffer @ 0x56289e5ab100] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0x56289e5ab100] Error setting option time_base to value 1/0.
[graph_0_in_0_1 @ 0x5628a3f5e800] Error applying options to the filter.
Error reinitializing filters!
Error while filtering: Numerical result out of range
Finishing stream 0:1 without any data written to it.
[abuffer @ 0x56289b2b89c0] Value inf for parameter 'time_base' out of range [0 - 2.14748e+09]
    Last message repeated 1 times
[abuffer @ 0x56289b2b89c0] Error setting option time_base to value 1/0.
[graph_0_in_0_1 @ 0x56289a63e780] Error applying options to the filter.
Error configuring filter graph
Conversion failed!


  


  ---

  


  I tried the above even with this command

  


  ffmpeg -analyzeduration 2147483647 -probesize 2147483647 -i ff_vlc.ts -vcodec copy -acodec aac -map 0:v:0 -map 0:a:0 ff_vlc_2.ts


  


  Still get the same errors. Only changed lines in the output are

  


  [mpegts @ 0x55e1b757d580] Failed to allocate buffers for seekback
[mpegts @ 0x55e1b757d580] Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), stereo, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' (2147483647) and 'probesize' (2147483647) options


  


  ---

  


  VLC player has no problems in playing this audio ... only ffmpeg cannot decode.

  


  How do I fix this ?

  


  Please help
Thanks

  


• Error submitting the frame for encoding when submitting NV12 texture

  6 mai 2022, par Caio Augusto

  I'm trying to encode D3D11 NV12 Texture on QSV encoder but getting [h264_qsv @ 00000244ce6f50c0] Error submitting the frame for encoding.

  


  Main :

  


  int width = 1920;
int height = 1080;
FILE* outfile;

fopen_s(&outfile, "D:\\Sources\\D3D11QSV\\x64\\Debug\\outfile.264", "wb");

const AVCodec* codec = avcodec_find_encoder_by_name("h264_qsv");
AVCodecContext* ctx = avcodec_alloc_context3(codec);

ctx->width = width;
ctx->height = height;
ctx->time_base = AVRational{ 1, 60 };
ctx->framerate = AVRational{ 60, 1 };
ctx->slices = 1;

ctx->sw_pix_fmt = AV_PIX_FMT_NV12;
ctx->pix_fmt = AV_PIX_FMT_NV12;
ctx->bit_rate = 400000;
ctx->gop_size = 10;
ctx->max_b_frames = 1;

auto status = avcodec_open2(ctx, codec, NULL);
if (status < 0) {
    std::cout << "Open codec error!\n";
}

AVFrame* sw_frame = av_frame_alloc();
sw_frame->format = ctx->sw_pix_fmt;
sw_frame->width = ctx->width;
sw_frame->height = ctx->height;
status = av_frame_get_buffer(sw_frame, 0);

fill_frame(sw_frame, ctx);


  


  Filling the frame :

  


  auto ret = 0;

if (ret < 0) {
    fprintf(stderr, "Could not allocate the video frame data\n");
    exit(1);
}

int i, y, x, c = 0;
for (i = 0; i < 60; i++) {
    fflush(stdout);

    ret = av_frame_make_writable(frame);
    
    auto texture = create_texture();
    auto desc = (AVD3D11FrameDescriptor*)frame->buf[0]->data;
    desc->texture = (ID3D11Texture2D*)texture;
    desc->index = 0;

    frame->data[0] = (std::uint8_t*)texture;
    frame->data[1] = 0;
    frame->linesize[0] = width * 4;

    frame->pts = i;

    encode(frame, ctx);
}


  


  Creating Texture :

  


  D3D11_TEXTURE2D_DESC const desc = CD3D11_TEXTURE2D_DESC(
    DXGI_FORMAT_NV12,           // HoloLens PV camera format, common for video sources
    width,                    // Width of the video frames
    height,                   // Height of the video frames
    1,                          // Number of textures in the array
    1,                          // Number of miplevels in each texture
    D3D11_BIND_SHADER_RESOURCE, // We read from this texture in the shader
    D3D11_USAGE_DYNAMIC,        // Because we'll be copying from CPU memory
    D3D11_CPU_ACCESS_WRITE      // We only need to write into the texture
);

ID3D11Device* pd3dDevice = create_d3d11_device();

ID3D11Texture2D* pTexture = NULL;
HRESULT err = pd3dDevice->CreateTexture2D(&desc, nullptr, &pTexture);


if (SUCCEEDED(err)) {
    D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc = CD3D11_SHADER_RESOURCE_VIEW_DESC(
        pTexture,
        D3D11_SRV_DIMENSION_TEXTURE2D,
        DXGI_FORMAT_R8_UNORM
    );

    ID3D11ShaderResourceView* texSRV = NULL;

    err = pd3dDevice->CreateShaderResourceView(pTexture,
        &SRVDesc, &texSRV);

    D3D11_SHADER_RESOURCE_VIEW_DESC const chrominancePlaneDesc = CD3D11_SHADER_RESOURCE_VIEW_DESC(
        pTexture,
        D3D11_SRV_DIMENSION_TEXTURE2D,
        DXGI_FORMAT_R8G8_UNORM
    );

    ID3D11ShaderResourceView* m_chrominanceView = NULL;

    err = pd3dDevice->CreateShaderResourceView(pTexture,
        &chrominancePlaneDesc, &m_chrominanceView);

}

if (FAILED(err))
{
    fprintf(stderr, "Error creating texture\n");
    exit(1);
}

return pTexture;


  


  Creating D3D11 device :

  


      ID3D11Device* dev11 = NULL;
    ID3D11DeviceContext* devcon11 = NULL;

    D3D_FEATURE_LEVEL featureLevels[]{
   D3D_FEATURE_LEVEL_11_1,
   D3D_FEATURE_LEVEL_11_0,
   D3D_FEATURE_LEVEL_10_1,
   D3D_FEATURE_LEVEL_10_0,
   D3D_FEATURE_LEVEL_9_3,
   D3D_FEATURE_LEVEL_9_2,
   D3D_FEATURE_LEVEL_9_1
    };


    int err = D3D11CreateDevice(
        nullptr,
        D3D_DRIVER_TYPE_HARDWARE,
        nullptr,
        D3D11_CREATE_DEVICE_VIDEO_SUPPORT,
        featureLevels, sizeof(featureLevels) / sizeof(D3D_FEATURE_LEVEL),
        D3D11_SDK_VERSION,
        &dev11,
        nullptr,
        &devcon11);

    return dev11;


  


  Encoding :

  


  auto status = 0;

status = avcodec_send_frame(ctx, frame); //error happening here

AVPacket* pkt;

pkt = av_packet_alloc();

if (status < 0) {
    fprintf(stderr, "Error sending a frame for encoding\n");
    exit(1);
}

while (status >= 0) {
    status = avcodec_receive_packet(ctx, pkt);
    if (status == AVERROR(EAGAIN) || status == AVERROR_EOF)
        return;
    else if (status < 0) {
        fprintf(stderr, "Error during encoding\n");
        exit(1);
    }

    printf("Write packet \n", pkt->pts, pkt->size);
    fwrite(pkt->data, 1, pkt->size, outfile);
    av_packet_unref(pkt);
}


  


  Everything runs well until encoding the frame. I have tried sending a dummy nv12 data (not a d3d11 texture) and it works well.

  


• How to Transcode ALL Audio streams from input to output using ffmpeg ?

  24 novembre 2022, par user1940163

  I have an input MPEG TS file 'unit_test.ts'. This file has following content (shown by ffprobe) :

  


  Input #0, mpegts, from 'unit_test.ts':
  Duration: 00:00:57.23, start: 73674.049844, bitrate: 2401 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x31]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 852x480 [SAR 640:639 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x34](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 448 kb/s
    Stream #0:2[0x35](spa): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s


  


  I want to convert it into another MPEG TS file. Requirement is that the Video stream of the input should be directly copied to the output whereas ALL the audio streams should be transcoded "aac" format.

  


  I tried this command :

  


  ffmpeg -i unit_test.ts  -map 0 -c copy -c:a aac maud_test.ts

  


  It converted it into 'maud_test.ts' with following contents (shown by ffprobe)

  


  Input #0, mpegts, from 'maud_test.ts':
  Duration: 00:00:57.25, start: 1.400000, bitrate: 2211 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 852x480 [SAR 640:639 DAR 16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 6 channels, fltp, 391 kb/s
    Stream #0:2[0x102](spa): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 133 kb/s


  


  So it appeared as if the command worked....However when I play the maud_test.ts file in vlc player I can see both audio streams listed in the menu ; but Stream 1 (eng) remains silent............whereas Stream 2 (spa) has proper audio. (Original TS file has both audio streams properly audible)

  


  I have tried this with different input files and have seen that same problem occurs in each case.

  


  What that I am doing is not right ?

  


  How should I get this done ? (I can write explicit stream by stream map and channel arguments to get that done ; however I want the command line to be generic, in that the input file could be having any configuration with one Video and several Audios with different formats. The configuration will not be known beforehand.)