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• flient-ffmpeg getting error as "ffmpeg exited with code 1 : pipe:0 : Invalid data found when processing input"

  6 avril 2023, par Abhishek Rawal

  I am trying to create API where i need to get uploaded video and create thumbnail from that video. But conditions are :

  


  

  • Video should not store on local disk

  


  • Once thumbnail is create it should not store on local disk, instead it should directly uploaded to AWS s3 bucket.

  


  


  Following is the code i am trying with :

  


  


  


  const ffmpeg = require('fluent-ffmpeg');
const stream = require('stream');

router.post('/thumbnail', upload.any(), (req, res) => {
  const videoBuffer = req.files[0].buffer;
  
  let readableVideoBuffer = new stream.PassThrough();
    readableVideoBuffer.write(videoBuffer);
    readableVideoBuffer.end()
    
  let bufferStream = new stream.PassThrough();
  
  ffmpeg(readableVideoBuffer)
    .on('filenames', function(filenames) {
      console.log('Will generate ' + filenames.join(', '))
    })
    .on('end', function() {
      console.log('Screenshots taken');
    })
    .on('error', (err) => {
      console.log(err);
    })
    .screenshots({
      count: 4,
      size: '100x100',
      timestamps: ['00:00:01.000'],
    })
    .writeToStream(bufferStream, { end: true });  /* while using this statement i am getting error */
    
    const buffers = [];
    bufferStream.on('data', function (buf) {
      buffers.push(buf);
    });
    bufferStream.on('end', function () {
      const outputBuffer = Buffer.concat(buffers);
      // use s3 bucket code here
      console.log('outputBuffer===========>', outputBuffer)
    });
})

  


  


  



  so while calling this API my app is crashing and i am getting error as :

  


  


  Error : ffmpeg exited with code 1 : pipe:0 : Invalid data found when
processing input

  


  


  Blockquote

  


  If i am not using this statement :

  


  


  .writeToStream(bufferStream, end : true ) ;

  


  


  then able to save file but in local disk, which is not required in my case.

  


  Please help me to understand what is wrong in this code, how i can resolve it.
Any type of help is appreciated.

  


• What is the right way to put data to abuffersrc and pull from abufersink when I have multiple inputs with FFMPEG "afir" filter ?

  19 décembre 2022, par Evgenii

  I want to understand why av_buffersink_get_frame() always return AVERROR(EAGAIN).
I use this algorithm :

  


  

  1. Open input file input.mp3, create decoder for input file

  


  2. Open signal file signal.wav, create decoder for signal file

  


  3. Create filter graph and inputs/outputs with function avfilter_graph_parse2("[in0][in1]afir[out], &inputs, &outputs")

  


  4. Create abuffersrc for every inputs with names "in0", "in1"

  


  5. Create one abuffersink for one outputs with name "out"

  


  6. Read and decode samples with methods av_read_frame(), avcodec_send_packet(), avcodec_receive_frame(), put samples to abuffersrc with av_buffersrc_add_frame() and trying to read samples from abuffersink with av_buffersink_get_frame() - HERE I get AVERROR(EAGAIN) for every call

  


  


  Please, help !

  


  I've tried to read all samples and push its to abuffersrc for input and signal pipes in first step and and call av_buffersink_get_frame one time in second step. I got AVERROR(EGAIN) again.

  


  I've tried to config two outputs with names "in0" and "in1" and one input with name "out" and call avfilter_graph_parse_ptr() as done in here :

  


  static AVFilterContext *init_buffersrc(AVCodecContext *decoder, AVFilterGraph *filter_graph, const char *pad_name) {
    AVFilterContext *buffersrc = NULL;
    uint8_t args[1024];

    snprintf(args, sizeof(args),
        "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64"",
        decoder->time_base.num, decoder->time_base.den, decoder->sample_rate, av_get_sample_fmt_name(decoder->sample_fmt), decoder->channel_layout);

    CHECK_AV(avfilter_graph_create_filter(&buffersrc, avfilter_get_by_name("abuffer"), pad_name, args, NULL, filter_graph));
    return buffersrc;
}

static AVFilterContext *init_buffersink(AVFilterGraph *filter_graph) {
    AVFilterContext *buffersink = NULL;

    CHECK_AV(avfilter_graph_create_filter(&buffersink, avfilter_get_by_name("abuffersink"), "out", NULL, NULL, filter_graph));
    return buffersink;
}

static void init_complex_graph(const char *desc, Context *ctx) {

    AVFilterGraph *filter_graph;
    AVFilterInOut *inputs = avfilter_inout_alloc();
    AVFilterInOut **outputs = (AVFilterInOut**) av_malloc(ctx->nb_input_files*sizeof(AVFilterInOut *));
    char *dump;
    uint8_t pad_name[64];

    filter_graph = ctx->filter_graph = avfilter_graph_alloc();
    filter_graph->nb_threads = 1;

    for (int i = 0; i< ctx->nb_input_files; ++i) {
        outputs[i] = avfilter_inout_alloc();
    }

    for (int i = 0; i < ctx->nb_input_files; ++i) {
        AVFilterContext *buffersrc;
        snprintf(pad_name, sizeof(pad_name), "in%d", i);        
        buffersrc = init_buffersrc(ctx->input_files[i]->decoder, filter_graph, pad_name);
        ctx->input_files[i]->buffersrc = buffersrc;
        outputs[i]->name = av_strdup(pad_name);
        outputs[i]->filter_ctx = buffersrc;
        outputs[i]->pad_idx = 0;
        if (i == ctx->nb_input_files - 1) {
            outputs[i]->next = NULL;
        }
        else {
            outputs[i]->next = outputs[i + 1];
        }
    }

    ctx->output_file->buffersink = init_buffersink(filter_graph);

    inputs->name = av_strdup("out");
    inputs->filter_ctx = ctx->output_file->buffersink;
    inputs->pad_idx =0;
    inputs->next = NULL;

    CHECK_AV(avfilter_graph_parse_ptr(filter_graph, desc, &inputs, outputs, NULL));

    CHECK_AV(avfilter_graph_config(filter_graph, NULL));
}   

// Call init_complex_graph("[in0][in1]afir[out]", SOME_CONTEXT);


  


  and still nothing.

  


• lavc/qsvdec : update HDR side data on output AVFrame

  21 novembre 2022, par Haihao Xiang

  lavc/qsvdec : update HDR side data on output AVFrame
  The SDK may provides HDR metadata for HDR streams via mfxExtBuffer
  
  attached on output mfxFrameSurface1
  Signed-off-by : Haihao Xiang <haihao.xiang@intel.com>
  

  • [DH] libavcodec/qsv_internal.h
  • [DH] libavcodec/qsvdec.c