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• Hello, I have some problems with ffmpeg.concat, there are logs

  12 mai 2022, par Matvey

  Log :

  


  [swscaler @ 0x27d3c10] [swscaler @ 0x2886fe0] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x27d3c10] [swscaler @ 0x283be10] deprecated pixel format used, make sure you did set range correctly
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:856_v1.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:911_v3.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
Output #0, avi, to '/home/pi/Desktop/VIDEOREG/2022:05:12_09:51:57:890_v2.avi':
  Metadata:
    software        : Lavf58.45.100
    ISFT            : Lavf59.20.101
  Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 200 kb/s, 25 fps, 25>
    Metadata:
      encoder         : Lavc59.25.100 mpeg4
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
[mjpeg @ 0x27aaa10] mjpeg_decode_dc: bad vlc: 0:0 (0x27b7c20)trate=8122.4kbits/s speed=1.33e+04x
[mjpeg @ 0x27aaa10] error dc
[mjpeg @ 0x27aaa10] error y=18 x=37
[mjpeg @ 0x27aaa10] EOI missing, emulating
[mjpeg @ 0x29551c0] error count: 65
[mjpeg @ 0x29551c0] error y=2 x=17
###############################################


  


  My part of code for concatenation audio and video :

  


  def video_with_audio(number, filename, video):
        ms = datetime.today().strftime('%f') + '0000'
        ms = ms[:3]
        name = datetime.today().strftime('%Y:%m:%d_%H:%M:%S:')
        title_video = f'/home/pi/Desktop/VIDEOREG/{name}{ms}{number}.avi'
        print(title_video)
        os.system("ffmpeg -i " + video + " -vf setpts=PTS*2 " + title_video)
        ####################################################
        ms_1 = datetime.today().strftime('%f') + '0000'
        ms_1 = ms_1[:3]
        name_1 = datetime.today().strftime('%Y:%m:%d_%H:%M:%S:')
        title_video = f'/home/pi/Desktop/VIDEOREG/{name}{ms}{number}.avi'
        title_video_1 = f'/home/pi/Desktop/VIDEOREG/{name_1}{ms_1}{number}.avi'
        input_audio = ffmpeg.input(filename)
        input_video = ffmpeg.input(title_video)
        print(title_video_1)
        ffmpeg.concat(input_video, input_audio, v=1, a=1).output(title_video_1).run()


  


  There are slight delays during video recording, because I print information from sensors on video, can this affect the concatenation of video with audio ? (Saved video is accelerated ? that's why at the beginning I used slowing video down.)

  


• More problems with FFmpeg not recognizing the directory I'm sending it to

  8 novembre 2019, par Requiem_7

  I am creating a program that takes an audio file, breaks it up into 30-second audio files, and sends those files to Google’s Speech Recognition API to transcribe the audio. I’m using FFmpeg to break up the original audio file and make the 30-second files. It was working for about 20 minutes and I didn’t change anything but now it’s giving me an error saying that no such file or directory exists.

  Here is the error it gives me :

  C:\Users\hmkur\Desktop\Python\Transcribing_Audio_GoogleAPI_Python>ffmpeg -i source/valve.flac -f segment -segment_time 30 -c copy parts/out%01d.flac
  
  ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.1.1 (GCC) 20190807
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'source/valve.flac':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2mp41
  
      encoder         : Lavf58.29.100
  
    Duration: 00:11:42.54, start: 0.000000, bitrate: 129 kb/s
  
      Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
  
      Metadata:
  
        handler_name    : ISO Media file produced by Google Inc.
  
  [segment @ 000001f8e84bd100] Opening 'parts/out0.flac' for writing
  
  [segment @ 000001f8e84bd100] Failed to open segment 'parts/out0.flac'
  
  Could not write header for output file #0 (incorrect codec parameters ?): No such file or directory
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
      Last message repeated 1 times

  Both the folder "source" with "valve.flac" exists as well as the folder "parts" and the files "out0.flac", etc. I was originally trying in the wav file format, switched to flac and it worked for about 20 minutes then stopped working.

• ffmpeg transcoding.c problems about 'dimensions not set'

  26 octobre 2020, par Park Han Wool

  I am trying to solve this problem in transcoding.c example about FFMPEG. but I don't know how to approach it...

  


  I am getting this error :

  


  [libx264 @ 00000000022c7120] dimensions not set
Cannot open video encoder for stream #0
Error occurred: Invalid argument


  


  Here is my code to fix the transcoding.c example a little bit

  


  static int open_output_file(const char *filename)
{
    AVStream *out_stream;
    AVStream *in_stream;
    AVCodecContext *dec_ctx, *enc_ctx;
    AVCodec *encoder;
    int ret;
    unsigned int i;

    ofmt_ctx = NULL;

    avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename);

    if (!ofmt_ctx) {
        av_log(NULL, AV_LOG_ERROR, "Could not create output context\n");
        return AVERROR_UNKNOWN;
    }

    for (i = 0; i < ifmt_ctx->nb_streams; i++) {
        in_stream = ifmt_ctx->streams[i];
        out_stream = avformat_new_stream(ofmt_ctx, NULL);

        if (!out_stream) {
            av_log(NULL, AV_LOG_ERROR, "Failed allocating output stream\n");
            return AVERROR_UNKNOWN;
        }

        dec_ctx = avcodec_alloc_context3(in_stream->codec->codec);
        enc_ctx = avcodec_alloc_context3(out_stream->codec->codec);

        if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
            /* in this example, we choose transcoding to same codec */
            encoder = avcodec_find_encoder(dec_ctx->codec_id);
            
            if (!encoder) {
                av_log(NULL, AV_LOG_FATAL, "Necessary encoder not found\n");
                return AVERROR_INVALIDDATA;
            }

            /* In this example, we transcode to same properties (picture size,
            * sample rate etc.). These properties can be changed for output
            * streams easily using filters */
            if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {

                enc_ctx->height = dec_ctx->height;
                enc_ctx->width = dec_ctx->width;
                enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio;

                /* take first format from list of supported formats */
                enc_ctx->pix_fmt = AV_PIX_FMT_YUV420P;

                /* video time_base can be set to whatever is handy and supported by encoder */
                enc_ctx->time_base = dec_ctx->time_base;
            }

            else {
                enc_ctx->sample_rate = dec_ctx->sample_rate;
                enc_ctx->channel_layout = dec_ctx->channel_layout;
                enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout);

                /* take first format from list of supported formats */
                enc_ctx->sample_fmt = encoder->sample_fmts[0];
                enc_ctx->time_base.num = 1;
                enc_ctx->time_base.den = enc_ctx->sample_rate;
            }

            /* Third parameter can be used to pass settings to encoder */
            ret = avcodec_open2(enc_ctx, encoder, NULL);
        
            if (ret < 0) {
                cout << "ret<0" << endl;
                av_log(NULL, AV_LOG_ERROR, "Cannot open video encoder for stream #%u\n", i);
                return ret;
            }
        }
        else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) {
            av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is of unknown type, cannot proceed\n", i);
            return AVERROR_INVALIDDATA;
        }
        else {
            /* if this stream must be remuxed */
            ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec, ifmt_ctx->streams[i]->codec);
            if (ret < 0) {
                av_log(NULL, AV_LOG_ERROR, "Copying stream context failed\n");
                return ret;
            }
        }
        if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
            enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
    }

    av_dump_format(ofmt_ctx, 0, filename, 1);

    if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) {
        ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE);
        if (ret < 0) {
            av_log(NULL, AV_LOG_ERROR, "Could not open output file '%s'", filename);
            return ret;
        }
    }

    /* init muxer, write output file header */
    ret = avformat_write_header(ofmt_ctx, NULL);
    if (ret < 0) {
        av_log(NULL, AV_LOG_ERROR, "Error occurred when opening output file\n");
        return ret;
    }
    return 0;
}


  


  Why doesn't avcodec_open2 work in my code ?