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Sur d’autres sites (9113)

  • 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 ?

    


  • AVCodecContex returns zero for width and height in android

    17 février 2023, par Whoami

    Not sure what was my mistake in the below code. I m trying with ffmpeg 0.11 and SDL2.0 in android.

    



    QUESTION :
Why Width and Height of the CodecContext gives me always zero ?..

    



    int main(int argc, char *argv[])&#xA;{&#xA;&#xA;    int flags;&#xA;    flags = SDL_INIT_VIDEO | SDL_INIT_TIMER;&#xA;&#xA;    if (SDL_Init (flags)) {&#xA;        LOGD ("Could not intialize Video for SDL: %s \n", SDL_GetError());&#xA;    }&#xA;    else &#xA;        LOGD (" SUCCESS: SDL_Init ");&#xA;&#xA;    // ffmpeg Register all services..&#xA;    ffmpeg_register_all (); &#xA;&#xA;&#xA;    pFrame = avcodec_alloc_frame ();&#xA;    context = avformat_alloc_context();&#xA;&#xA;    err = avformat_open_input (&amp;context, "rtsp:ip:port", NULL, NULL);&#xA;    if ( err &lt; 0) {&#xA;        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "Unable to open rtsp... ");&#xA;&#xA;        return -1;&#xA;    }&#xA;&#xA;    for (i = 0; i &lt; context->nb_streams; i&#x2B;&#x2B;)&#xA;    {               &#xA;        // Find the Decoder.&#xA;        codec = avcodec_find_decoder(context->streams[i]->codec->codec_id);&#xA;        if (codec->type  == AVMEDIA_TYPE_VIDEO ) {&#xA;            __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "Found Video Streaming..  ");&#xA;            videoStreamIndex = i;&#xA;&#xA;        }&#xA;    }&#xA;&#xA;    // Play RTSP&#xA;    av_read_play(context);&#xA;&#xA;    // Get Codec Context.&#xA;    pCodecCtx = context->streams[videoStreamIndex]->codec;&#xA;    if ( pCodecCtx == NULL )&#xA;        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "CodecCtx is NULL>>> ");&#xA;    else&#xA;        __android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "CodecCtx is &lt;&lt;<ok>>> ");&#xA;&#xA;&#xA;    //Find the Decoder.&#xA;    pCodec = avcodec_find_decoder (pCodecCtx->codec_id);&#xA;    avcodec_open2 (pCodecCtx, pCodec, NULL);&#xA;&#xA;&#xA;    int w = pCodecCtx->width;  // Why me getting 0 ? &#xA;    int h = pCodecCtx->height;&#xA;&#xA;    window = SDL_CreateWindow ("Test ffmpeg",SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI);&#xA;    // What this HIGHDPI Means ??&#xA;&#xA;    if ( window != NULL ) &#xA;    {&#xA;        LOGD (" WINDOW CREATED.. , create Renderer ..");&#xA;        renderer = SDL_CreateRenderer (window, -1, 0);  &#xA;    }&#xA;    else&#xA;    {&#xA;        LOGD (" Invalid SDL Window ");  &#xA;    }&#xA;__android_log_print(ANDROID_LOG_DEBUG, "ffmpegguard", "Width and Height of PCodeccCtx.. %d .. %d " , w, h); &#xA;    return 0;&#xA;}&#xA;</ok>

    &#xA;

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