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  • ffmpeg runs in terminal but returns error in subprocess.run from flatpak-installed pycharm

    19 juin 2024, par name

    I want to run this command in python :

    


    ffmpeg -ss 00:00:30 -i "/home/exl/—1—ARCHIVE—1—/video/music videos/author --- a2 - name (text).webm" -vf scale=150:-2 -vframes 1 -c:v libwebp -compression_level 6 -quality 100 /home/exl/—1—ARCHIVE—1—/—3—previews—3—/734a8a0bac3a83e0f6c69416a26ec5cd211a6d742f3df63bb72bdbe6431b57c30677bc11551ba4aaaecac15ed2c48de51340a09020b7e9d9479e1e81ff766191.webp


    


    In terminal it works fine, but in subprocess returns error. Python code :

    


    finished_process = subprocess.run(
                    [
                        '/usr/bin/ffmpeg',
                        '-ss', f'00:00:{seconds_shift}',
                        '-i', original_path,
                        '-vf', 'scale=150:-2',
                        '-vframes', '1',
                        '-c:v', 'libwebp',
                        '-compression_level', '6',
                        '-quality', '100',
                        preview_path
                    ],
                    #stdout=subprocess.DEVNULL,
                    #stderr=subprocess.DEVNULL,
                    check=False,
                    capture_output=True
                )


    


    finished_process.stderr.decode() :

    


    ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (GCC)
  configuration: --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --disable-debug --disable-doc --disable-static --enable-optimizations --enable-shared --disable-everything --enable-ffplay --enable-ffprobe --enable-gnutls --enable-libaom --enable-libdav1d --enable-libfdk-aac --enable-libmp3lame --enable-libfontconfig --enable-libfreetype --enable-libopus --enable-libpulse --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-openal --enable-opengl --enable-sdl2 --enable-vulkan --enable-zlib --enable-libv4l2 --enable-libxcb --enable-vdpau --enable-vaapi --enable-encoder='ac3,alac,flac,libfdk_aac,g723_1,mp2,libmp3lame,libopus,libspeex,pcm_alaw,pcm_mulaw,pcm_f32le,pcm_s16be,pcm_s24be,pcm_s16le,pcm_s24le,pcm_s32le,pcm_u8,tta,libvorbis,wavpack,' --enable-encoder='ass,ffv1,libaom_av1,libvpx_vp8,libvpx_vp9,mjpeg_vaapi,rawvideo,theora,vp8_vaapi,libopenh264' --enable-decoder='adpcm_g722,alac,flac,g723_1,g729,libfdk_aac,libopus,libspeex,mp2,mp3,m4a,pcm_alaw,pcm_mulaw,pcm_f16le,pcm_f24le,pcm_f32be,pcm_f32le,pcm_f64be,pcm_f64le,pcm_s16be,pcm_s16be_planar,pcm_s24be,pcm_s16le,pcm_s16le_planar,pcm_s24le,pcm_s24le_planar,pcm_s32le,pcm_s32le_planar,pcm_s64be,pcm_s64le,pcm_s8,pcm_s8_planar,pcm_u8,pcm_u24be,pcm_u24le,pcm_u32be,pcm_u32le,tta,vorbis,wavpack,' --enable-decoder='ass,ffv1,mjpeg,mjpegb,libaom_av1,libdav1d,libvpx_vp8,libvpx_vp9,rawvideo,theora,vp8,vp9,libopenh264' --enable-encoder='bmp,gif,jpegls,png,tiff,webp,' --enable-decoder='bmp,gif,jpegls,png,tiff,webp,' --enable-hwaccel='vp8_vaapi,mjpeg_vaapi,' --enable-parser='aac,ac3,flac,mjpeg,mpegaudio,mpeg4video,opus,vp3,vp8,vp9,vorbis,' --enable-muxer='ac3,ass,flac,g722,gif,matroska,mp3,mpegvideo,rtp,ogg,opus,pcm_s16be,pcm_s16le,wav,webm,' --enable-demuxer='aac,ac3,ass,flac,g722,gif,image_jpeg_pipe,image_png_pipe,image_webp_pipe,matroska,mjpeg,mov,mp3,mpegvideo,ogg,pcm_mulaw,pcm_alaw,pcm_s16be,pcm_s16le,rtp,wav,' --enable-filter='crop,scale,overlay,amix,amerge,aresample,format,aformat,fps,transpose,pad,' --enable-indev='v4l2,xcbgrab,' --enable-protocol='crypto,file,pipe,rtp,srtp,rtsp,tcp,udp,unix,' --arch=x86_64 --enable-libopenh264
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
Input #0, matroska,webm, from '/home/exl/—1—ARCHIVE—1—/video/music videos/author --- a2 - name (text).webm':
  Metadata:
    ENCODER         : Lavf59.16.100
  Duration: 00:03:24.98, start: -0.007000, bitrate: 915 kb/s
  Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 1920x1036, SAR 1:1 DAR 480:259, 25 fps, 25 tbr, 1k tbn (default)
    Metadata:
      DURATION        : 00:03:24.960000000
  Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, s16 (default)
    Metadata:
      DURATION        : 00:03:24.981000000
[NULL @ 0x55dd82de7d00] Unable to find a suitable output format for '/home/exl/—1—ARCHIVE—1—/—3—previews—3—/734a8a0bac3a83e0f6c69416a26ec5cd211a6d742f3df63bb72bdbe6431b57c30677bc11551ba4aaaecac15ed2c48de51340a09020b7e9d9479e1e81ff766191.webp'
/home/exl/—1—ARCHIVE—1—/—3—previews—3—/734a8a0bac3a83e0f6c69416a26ec5cd211a6d742f3df63bb72bdbe6431b57c30677bc11551ba4aaaecac15ed2c48de51340a09020b7e9d9479e1e81ff766191.webp: Invalid argument



    


    As suggested here (FFMPEG command runs in terminal but not by subprocess) i tried using which determine path to correct version, but this command returns /usr/bin/ffmpeg both in python and in terminal.

    


    which ffmpeg (both subprocess.run(['which', 'ffmpeg'], capture_output=True).stdout and terminal) : /usr/bin/ffmpeg

    


    ffmpeg -version : 5.1.1-1ubuntu1

    


    ffmpeg version 5.1.1-1ubuntu1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12 (Ubuntu 12.2.0-1ubuntu1)
configuration: --prefix=/usr --extra-version=1ubuntu1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-shared


    


    subprocess.run(['ffmpeg', '-version'], capture_output=True).stdout.decode() : 5.0.1

    


    ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (GCC)
configuration: --prefix=/usr --libdir=/usr/lib/x86_64-linux-gnu --disable-debug --disable-doc --disable-static --enable-optimizations --enable-shared --disable-everything --enable-ffplay --enable-ffprobe --enable-gnutls --enable-libaom --enable-libdav1d --enable-libfdk-aac --enable-libmp3lame --enable-libfontconfig --enable-libfreetype --enable-libopus --enable-libpulse --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-openal --enable-opengl --enable-sdl2 --enable-vulkan --enable-zlib --enable-libv4l2 --enable-libxcb --enable-vdpau --enable-vaapi --enable-encoder='ac3,alac,flac,libfdk_aac,g723_1,mp2,libmp3lame,libopus,libspeex,pcm_alaw,pcm_mulaw,pcm_f32le,pcm_s16be,pcm_s24be,pcm_s16le,pcm_s24le,pcm_s32le,pcm_u8,tta,libvorbis,wavpack,' --enable-encoder='ass,ffv1,libaom_av1,libvpx_vp8,libvpx_vp9,mjpeg_vaapi,rawvideo,theora,vp8_vaapi,libopenh264' --enable-decoder='adpcm_g722,alac,flac,g723_1,g729,libfdk_aac,libopus,libspeex,mp2,mp3,m4a,pcm_alaw,pcm_mulaw,pcm_f16le,pcm_f24le,pcm_f32be,pcm_f32le,pcm_f64be,pcm_f64le,pcm_s16be,pcm_s16be_planar,pcm_s24be,pcm_s16le,pcm_s16le_planar,pcm_s24le,pcm_s24le_planar,pcm_s32le,pcm_s32le_planar,pcm_s64be,pcm_s64le,pcm_s8,pcm_s8_planar,pcm_u8,pcm_u24be,pcm_u24le,pcm_u32be,pcm_u32le,tta,vorbis,wavpack,' --enable-decoder='ass,ffv1,mjpeg,mjpegb,libaom_av1,libdav1d,libvpx_vp8,libvpx_vp9,rawvideo,theora,vp8,vp9,libopenh264' --enable-encoder='bmp,gif,jpegls,png,tiff,webp,' --enable-decoder='bmp,gif,jpegls,png,tiff,webp,' --enable-hwaccel='vp8_vaapi,mjpeg_vaapi,' --enable-parser='aac,ac3,flac,mjpeg,mpegaudio,mpeg4video,opus,vp3,vp8,vp9,vorbis,' --enable-muxer='ac3,ass,flac,g722,gif,matroska,mp3,mpegvideo,rtp,ogg,opus,pcm_s16be,pcm_s16le,wav,webm,' --enable-demuxer='aac,ac3,ass,flac,g722,gif,image_jpeg_pipe,image_png_pipe,image_webp_pipe,matroska,mjpeg,mov,mp3,mpegvideo,ogg,pcm_mulaw,pcm_alaw,pcm_s16be,pcm_s16le,rtp,wav,' --enable-filter='crop,scale,overlay,amix,amerge,aresample,format,aformat,fps,transpose,pad,' --enable-indev='v4l2,xcbgrab,' --enable-protocol='crypto,file,pipe,rtp,srtp,rtsp,tcp,udp,unix,' --arch=x86_64 --enable-libopenh264


    


    Thank you in advance.

    


  • Terminal : How to extract vobsub subtitles to bitmap images (jpg, png) ?

    5 août 2022, par DevonDahon

    How to extract image-based subtitles to bitmap images (jpg, png) ?

    


    I tried with ffmpeg, but it seems to work only with text-based subtitles.

    


    $ ffmpeg -i myvideo.mp4 -map "0:2" output.bre.srt
ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with Apple clang version 13.1.6 (clang-1316.0.21.2.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/5.0.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'myvideo.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 512
    compatible_brands: mp42iso2avc1mp41
    creation_time   : 2022-08-03T21:58:07.000000Z
    encoder         : HandBrake 1.5.1 2022011000
  Duration: 00:11:05.40, start: 0.000000, bitrate: 1635 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt470bg, progressive), 712x576 [SAR 16:15 DAR 178:135], 1454 kb/s, 25 fps, 25 tbr, 90k tbn (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](bre): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 162 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Stereo
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](bre): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s (default)
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Brezhoneg
  Stream #0:3[0x4](fra): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 6 kb/s
    Metadata:
      creation_time   : 2022-08-03T21:58:07.000000Z
      handler_name    : Français
Error initializing output stream 0:0 -- Subtitle encoding currently only possible from text to text or bitmap to bitmap
Stream mapping:
  Stream #0:2 -> #0:0 (dvd_subtitle (dvdsub) -> subrip (srt))
    Last message repeated 1 times


    


  • Having trouble compiling ffmpeg code in command terminal

    10 septembre 2019, par m00ncake

    I am having a bit of trouble compiling my c++ code in my terminal. I have ffmpeg installed as shown below.

    ffmpeg version n4.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
    
  configuration: --enable-gpl --enable-version3 --disable-static --enable-shared --enable-small --enable-avisynth --enable-chromaprint --enable-frei0r --enable-gmp --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-librtmp --enable-libshine --enable-libsmbclient --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libxml2 --enable-libzmq --enable-libzvbi --enable-lv2 --enable-libmysofa --enable-openal --enable-opencl --enable-opengl --enable-libdrm
    
  libavutil      56. 22.100 / 56. 22.100
    
  libavcodec     58. 35.100 / 58. 35.100
    
  libavformat    58. 20.100 / 58. 20.100
    
  libavdevice    58.  5.100 / 58.  5.100
    
  libavfilter     7. 40.101 /  7. 40.101
    
  libswscale      5.  3.100 /  5.  3.100
    
  libswresample   3.  3.100 /  3.  3.100
    
  libpostproc    55.  3.100 / 55.  3.100
    
Hyper fast Audio and Video encoder
    
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

    However, when I compile my c++ code, currently trying to get NTP timestamps from private data in ffmpeg but I need to include their headers ? I have looked into ffmpeg’s libavformat folder and it does have rtpdec.h but when I compile it in the command line, i get this error. (trying to include this header for RTSPState and RTSPStream as well as RTPDemuxContext)

    cf.cpp:11:10: fatal error: libavformat/rtsp.h: No such file or directory
    
 #include <libavformat></libavformat>rtpdec.h>
    
          ^~~~~~~~~~~~~~~~~~~~
    
compilation terminated.

    This is my code :

    #include 
    
#include 
    
#include <iostream>
    
#include <fstream>
    
#include <sstream>
    

    
extern "C" {
    
#include <libavcodec></libavcodec>avcodec.h>
    
#include <libavformat></libavformat>avformat.h>
    
#include <libavformat></libavformat>avio.h>
    
#include <libavformat></libavformat>rtpdec.h>
    
#include <libswscale></libswscale>swscale.h>
    
}
    

    
int main(int argc, char** argv) {
    

    
    // Open the initial context variables that are needed
    
    SwsContext *img_convert_ctx;
    
    AVFormatContext* format_ctx = avformat_alloc_context();
    
    AVCodecContext* codec_ctx = NULL;
    
    int video_stream_index;
    
    uint32_t* last_rtcp_ts;
    
    double* base_time;
    
    double* time;
    

    
    // Register everything
    
    av_register_all();
    
    avformat_network_init();
    

    
    //open RTSP
    
    if (avformat_open_input(&amp;format_ctx, "rtsp://admin:password@192.168.1.67:554",
    
            NULL, NULL) != 0) {
    
        return EXIT_FAILURE;
    
    }
    

    
    if (avformat_find_stream_info(format_ctx, NULL) &lt; 0) {
    
        return EXIT_FAILURE;
    
    }
    

    
    //search video stream
    
    for (int i = 0; i &lt; format_ctx->nb_streams; i++) {
    
        if (format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
    
            video_stream_index = i;
    
    }
    

    
    AVPacket packet;
    
    av_init_packet(&amp;packet);
    

    
    //open output file
    
    AVFormatContext* output_ctx = avformat_alloc_context();
    

    
    AVStream* stream = NULL;
    
    int cnt = 0;
    

    
    //start reading packets from stream and write them to file
    
    av_read_play(format_ctx);    //play RTSP
    

    
    // Get the codec
    
    AVCodec *codec = NULL;
    
    codec = avcodec_find_decoder(AV_CODEC_ID_H264);
    
    if (!codec) {
    
        exit(1);
    
    }
    

    
// Add this to allocate the context by codec
    
codec_ctx = avcodec_alloc_context3(codec);
    

    
avcodec_get_context_defaults3(codec_ctx, codec);
    
avcodec_copy_context(codec_ctx, format_ctx->streams[video_stream_index]->codec);
    
std::ofstream output_file;
    

    
if (avcodec_open2(codec_ctx, codec, NULL) &lt; 0)
    
    exit(1);
    

    
    img_convert_ctx = sws_getContext(codec_ctx->width, codec_ctx->height,
    
            codec_ctx->pix_fmt, codec_ctx->width, codec_ctx->height, AV_PIX_FMT_RGB24,
    
            SWS_BICUBIC, NULL, NULL, NULL);
    

    
    int size = avpicture_get_size(AV_PIX_FMT_YUV420P, codec_ctx->width,
    
            codec_ctx->height);
    
    uint8_t* picture_buffer = (uint8_t*) (av_malloc(size));
    
    AVFrame* picture = av_frame_alloc();
    
    AVFrame* picture_rgb = av_frame_alloc();
    
    int size2 = avpicture_get_size(AV_PIX_FMT_RGB24, codec_ctx->width,
    
            codec_ctx->height);
    
    uint8_t* picture_buffer_2 = (uint8_t*) (av_malloc(size2));
    
    avpicture_fill((AVPicture *) picture, picture_buffer, AV_PIX_FMT_YUV420P,
    
            codec_ctx->width, codec_ctx->height);
    
    avpicture_fill((AVPicture *) picture_rgb, picture_buffer_2, AV_PIX_FMT_RGB24,
    
            codec_ctx->width, codec_ctx->height);
    

    
    while (av_read_frame(format_ctx, &amp;packet) >= 0 &amp;&amp; cnt &lt; 1000) { //read ~ 1000 frames
    

    
        RTSPState* rt = format_ctx->priv_data;
    
        RTSPStream *rtsp_stream = rt->rtsp_streams[0];
    
        RTPDemuxContext* rtp_demux_context = rtsp_stream->transport_priv;
    
        uint32_t new_rtcp_ts = rtp_demux_context->last_rtcp_timestamp;
    
        uint64_t last_ntp_time = 0;
    

    
        if (new_rtcp_ts != *last_rtcp_ts) {
    
            *last_rtcp_ts = new_rtcp_ts;
    
            last_ntp_time = rtp_demux_context->last_rtcp_ntp_time;
    
            uint32_t seconds = ((last_ntp_time >> 32) &amp; 0xffffffff) - 2208988800;
    
            uint32_t fraction  = (last_ntp_time &amp; 0xffffffff);
    
            double useconds = ((double) fraction / 0xffffffff);
    
            *base_time = seconds + useconds;
    
            uint32_t d_ts = rtp_demux_context->timestamp - *last_rtcp_ts;
    
            *time = *base_time + d_ts / 90000.0;
    
            std::cout &lt;&lt; "Time is: " &lt;&lt; *time &lt;&lt; std::endl;
    
        }
    

    
        std::cout &lt;&lt; "1 Frame: " &lt;&lt; cnt &lt;&lt; std::endl;
    
        if (packet.stream_index == video_stream_index) {    //packet is video
    
            std::cout &lt;&lt; "2 Is Video" &lt;&lt; std::endl;
    
            if (stream == NULL) {    //create stream in file
    
                std::cout &lt;&lt; "3 create stream" &lt;&lt; std::endl;
    
                stream = avformat_new_stream(output_ctx,
    
                        format_ctx->streams[video_stream_index]->codec->codec);
    
                avcodec_copy_context(stream->codec,
    
                        format_ctx->streams[video_stream_index]->codec);
    
                stream->sample_aspect_ratio =
    
                        format_ctx->streams[video_stream_index]->codec->sample_aspect_ratio;
    
            }
    
            int check = 0;
    
            packet.stream_index = stream->id;
    
            std::cout &lt;&lt; "4 decoding" &lt;&lt; std::endl;
    
            int result = avcodec_decode_video2(codec_ctx, picture, &amp;check, &amp;packet);
    
            std::cout &lt;&lt; "Bytes decoded " &lt;&lt; result &lt;&lt; " check " &lt;&lt; check
    
                    &lt;&lt; std::endl;
    
            if (cnt > 100)    //cnt &lt; 0)
    
                    {
    
                sws_scale(img_convert_ctx, picture->data, picture->linesize, 0,
    
                        codec_ctx->height, picture_rgb->data, picture_rgb->linesize);
    
                std::stringstream file_name;
    
                file_name &lt;&lt; "test" &lt;&lt; cnt &lt;&lt; ".ppm";
    
                output_file.open(file_name.str().c_str());
    
                output_file &lt;&lt; "P3 " &lt;&lt; codec_ctx->width &lt;&lt; " " &lt;&lt; codec_ctx->height
    
                        &lt;&lt; " 255\n";
    
                for (int y = 0; y &lt; codec_ctx->height; y++) {
    
                    for (int x = 0; x &lt; codec_ctx->width * 3; x++)
    
                        output_file
    
                                &lt;&lt; (int) (picture_rgb->data[0]
    
                                        + y * picture_rgb->linesize[0])[x] &lt;&lt; " ";
    
                }
    
                output_file.close();
    
            }
    
            cnt++;
    
        }
    
        av_free_packet(&amp;packet);
    
        av_init_packet(&amp;packet);
    
    }
    
    av_free(picture);
    
    av_free(picture_rgb);
    
    av_free(picture_buffer);
    
    av_free(picture_buffer_2);
    

    
    av_read_pause(format_ctx);
    
    avio_close(output_ctx->pb);
    
    avformat_free_context(output_ctx);
    

    
    return (EXIT_SUCCESS);
    
}
    
</sstream></fstream></iostream>

    The command i use to compile my code : g++ -w cf.cpp -o cf $(pkg-config --cflags --libs libavformat libswscale libavcodec)

    I am a bit new to coding in FFmpeg.

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