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    18 février 2011, par

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Sur d’autres sites (14287)

  • LIVE555 how to use h264 framer class to get nal units for ffmpeg

    18 octobre 2016, par Aleksey

    I’m trying to create a small app which will save frames from inoming h264 stream.
    I took a testRTSP programm as example and made several changes in DummySink::afterGettingFrame function to decode frames with the help of ffmpeg library.
    As I understand from frameSize, my first two frames are SPS units, so I concatenate them with my third frame and then send new big frame to ffmpeg decoder. But that doesnt work. ffmpeg tells me that my first frame is too big for SPS and then it tells me that there is no frame... I dont know what I need to change here.

    void DummySink::afterGettingFrame(unsigned frameSize, unsigned numTruncatedBytes,
    struct timeval presentationTime, unsigned /*durationInMicroseconds*/)
    {
    u_int8_t start_code[4] = { 0x00, 0x00, 0x00, 0x01 };
    int stCodeLen = 4;

    if (frameSize == 50)
    {
       //add start code
       memcpy(bufferWithStartCode, start_code, stCodeLen);
       shiftPtr += stCodeLen;
       memcpy(bufferWithStartCode + shiftPtr, fReceiveBuffer, frameSize);
       shiftPtr += frameSize;
    }
    else if (frameSize == 4)
    {
       memcpy(bufferWithStartCode + shiftPtr, fReceiveBuffer, frameSize);
       shiftPtr += frameSize;
    }
    else
    {
       if (shiftPtr == 0)
       {
           memcpy(bufferWithStartCode, start_code, stCodeLen);
           shiftPtr += stCodeLen;
       }
       memcpy(bufferWithStartCode + shiftPtr, fReceiveBuffer, frameSize);
       avpkt.size = frameSize + shiftPtr;
       avpkt.data = bufferWithStartCode;
       shiftPtr = 0;
       if (!avcodec_send_packet(cContext, &avpkt))
       {
           envir() << "error sending to decoder";

       }
       if (!avcodec_receive_frame(cContext, picture))
       {
           envir() << "error rx from decoder";
       }
       if (picture)
       {
           FILE *f;
           char buffer[32]; // The filename buffer.
           snprintf(buffer, sizeof(char) * 32, "file%i.txt", frame_num);
           f = fopen(buffer, "w");
           fprintf(f, "P5\n%d %d\n%d\n", fSubsession.videoWidth(), fSubsession.videoHeight(), 255);
           for (int i = 0;i < fSubsession.videoHeight();i++)
               fwrite(picture->data[0] + i * (picture->linesize[0]), 1, fSubsession.videoWidth(), f);
           fclose(f);
       }
    }

    envir() << frameSize << "\n";


    frame_num++;

    // Then continue, to request the next frame of data:
    continuePlaying();
  • Concatenating video using FFMPEG wrapper class [duplicate]

    21 décembre 2017, par alan samuel

    I am trying to concatenate video using NReco.VideoConverter wrapper class made for FFMPEG.

    I have three video files with the same frame rate and same frame size.

    Here is what I have done.

           string toconcatfile = @"C:\Users\Alan\Desktop\Black.mp4";
           string output1 = @"C:\Users\Alan\Desktop\output1.mp4";
           string output2 = @"C:\Users\Alan\Desktop\output2.mp4";
           string finaloutput = @"C:\Users\Alan\Desktop\finaloutput.mp4";

    All the three videos have a frame rate of 25 and Video frame size yet it fails when I add in toconcatfile to the final conversion method.

    It works when its just output1 and output2 meaning there must be a different setting in toconcatfile.

    Here is what I have tried.

           FFMpegConverter fFMpeg = new FFMpegConverter();


           //Slices first video
           ConvertSettings settings = new ConvertSettings
           {
               VideoFrameRate = 25,
               VideoFrameSize = FrameSize.hd480,
               MaxDuration = startcut,
               AudioSampleRate = 44100

           };

           //Slices second video
           ConvertSettings settings2 = new ConvertSettings
           {
               VideoFrameRate = 25,
               VideoFrameSize = FrameSize.hd480,
               Seek = endcut,
               AudioSampleRate = 44100

           };
           //Copies framerate and size from the previous video to the concatenation video
           ConvertSettings settings3 = new ConvertSettings
           {
               VideoFrameRate = 25,
               VideoFrameSize = FrameSize.hd480,
               MaxDuration = 4,
               AppendSilentAudioStream = true,
               AudioSampleRate = 44100

           };


     string newblack = @"C:\Users\Alan\Desktop\newblack.mp4";

           //Slice method called
           fFMpeg.ConvertMedia(pathtofile, Format.mp4, output1, Format.mp4, settings);
           fFMpeg.ConvertMedia(pathtofile, Format.mp4, output2, Format.mp4, settings2);
           fFMpeg.ConvertMedia(toconcatfile, Format.mp4, newblack, Format.mp4, settings3);

           String[] inputfiles = new String[2];
           inputfiles[0] = output1;
           inputfiles[1] = newblack;
           //inputfiles[1] = output2;


           ConcatSettings concatSettings = new ConcatSettings
           {
               //CustomOutputArgs = output1+" "+ toconcatfile+ " "+output2+ " -filter_complex \"[0:v:0][0:a:0][1:v:0][1:a:0][2:v:0][2:a:0]concat=n=3:v=1:a=1[outv][outa]\" -map \"[outv]\" - map \"[outa]\""
           };

           fFMpeg.ConcatMedia(inputfiles, finaloutput, Format.mp4, concatSettings);

    Can anyone help ?

    Edit : I get the exception message - "Invalid argument (exit code : 1)",

    Here is the output log of FFMPEG

           FFMPEG LOG ITEM - ffmpeg version 3.2.2 Copyright (c) 2000-2016 the
               FFmpeg developers
    FFMPEG LOG ITEM -   built with gcc 5.4.0 (GCC)
    FFMPEG LOG ITEM -   configuration: --enable-gpl --enable-version3 --enable-

    dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --

    enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
    FFMPEG LOG ITEM -   libavutil      55. 34.100 / 55. 34.100
    FFMPEG LOG ITEM -   libavcodec     57. 64.101 / 57. 64.101
    FFMPEG LOG ITEM -   libavformat    57. 56.100 / 57. 56.100
    FFMPEG LOG ITEM -   libavdevice    57.  1.100 / 57.  1.100
    FFMPEG LOG ITEM -   libavfilter     6. 65.100 /  6. 65.100
    FFMPEG LOG ITEM -   libswscale      4.  2.100 /  4.  2.100
    FFMPEG LOG ITEM -   libswresample   2.  3.100 /  2.  3.100
    FFMPEG LOG ITEM -   libpostproc    54.  1.100 / 54.  1.100
    FFMPEG LOG ITEM - Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Alan\Desktop\output1.mp4':
    FFMPEG LOG ITEM -   Metadata:
    FFMPEG LOG ITEM -     major_brand     : isom
    FFMPEG LOG ITEM -     minor_version   : 512
    FFMPEG LOG ITEM -     compatible_brands: isomiso2avc1mp41
    FFMPEG LOG ITEM -     encoder         : Lavf57.56.100
    FFMPEG LOG ITEM -   Duration: 00:00:30.02, start: 0.000000, bitrate: 543 kb/s
    FFMPEG LOG ITEM -     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 852x480 [SAR 3893:2872 DAR 276403:114880], 407 kb/s, SAR 12800:9443 DAR 320:133, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    FFMPEG LOG ITEM -     Metadata:
    FFMPEG LOG ITEM -       handler_name    : VideoHandler
    FFMPEG LOG ITEM -     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 129 kb/s (default)
    FFMPEG LOG ITEM -     Metadata:
    FFMPEG LOG ITEM -       handler_name    : SoundHandler
    FFMPEG LOG ITEM - Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Alan\Desktop\newblack.mp4':
    FFMPEG LOG ITEM -   Metadata:
    FFMPEG LOG ITEM -     major_brand     : isom
    FFMPEG LOG ITEM -     minor_version   : 512
    FFMPEG LOG ITEM -     compatible_brands: isomiso2avc1mp41
    FFMPEG LOG ITEM -     encoder         : Lavf57.56.100
    FFMPEG LOG ITEM -   Duration: 00:00:04.02, start: 0.000000, bitrate: 19 kb/s
    FFMPEG LOG ITEM -     Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 852x480 [SAR 160:213 DAR 4:3], 7 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    FFMPEG LOG ITEM -     Metadata:
    FFMPEG LOG ITEM -       handler_name    : VideoHandler
    FFMPEG LOG ITEM -     Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
    FFMPEG LOG ITEM -     Metadata:
    FFMPEG LOG ITEM -       handler_name    : SoundHandler
    FFMPEG LOG ITEM - Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\Alan\Desktop\output2.mp4':
    FFMPEG LOG ITEM -   Metadata:
    FFMPEG LOG ITEM -     major_brand     : isom
    FFMPEG LOG ITEM -     minor_version   : 512
    FFMPEG LOG ITEM -     compatible_brands: isomiso2avc1mp41
    FFMPEG LOG ITEM -     encoder         : Lavf57.56.100
    FFMPEG LOG ITEM -   Duration: 00:01:34.22, start: 0.000000, bitrate: 1058 kb/s
    FFMPEG LOG ITEM -     Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 852x480 [SAR 3893:2872 DAR 276403:114880], 923 kb/s, SAR 12800:9443 DAR 320:133, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    FFMPEG LOG ITEM -     Metadata:
    Exception thrown: 'NReco.VideoConverter.FFMpegException' in NReco.VideoConverter.dll
    FFMPEG LOG ITEM -       handler_name    : VideoHandler
    FFMPEG LOG ITEM -     Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    FFMPEG LOG ITEM -     Metadata:
    FFMPEG LOG ITEM -       handler_name    : SoundHandler
    FFMPEG LOG ITEM - [Parsed_concat_0 @ 04ded5e0] Input link in1:v0 parameters (size 852x480, SAR 160:213) do not match the corresponding output link in0:v0 parameters (852x480, SAR 12800:9443)
    FFMPEG LOG ITEM - [Parsed_concat_0 @ 04ded5e0] Failed to configure output pad on Parsed_concat_0
    FFMPEG LOG ITEM - Error configuring complex filters.
    FFMPEG LOG ITEM - Invalid argument
  • How do i create video from images with any slideshow effects(like fadein fadeout,crossfade,slides) using ffmpeg in android

    3 septembre 2016, par Bhavin Patel

    I want to create slideshow from bunch of images with the effects like fade-in fade-out, crossfade, slide from right to left, zoom-in zoom-out or any other slideshow effects and i want to create a video as a output from those images.

    I have also tried with below FFMPEG command but it seems that it will work for only images having same resolution for different different resolution it doesn’t.

    String fourImage ="ffmpeg -loop 1 -t 3 -i /sdcard/videokit/one.jpg
    -loop 1 -t 3 -i /sdcard/videokit/two.jpg -loop 1 -t 3 -i /sdcard/videokit/three.jpg -loop 1 -t 3 -i /sdcard/videokit/four.jpg
    -filter_complex [0:v]trim=duration=3,fade=t=out:st=2.5:d=0.5[v0] ;[1:v]trim=duration=3,fade=t=in:st=0:d=0.5,fade=t=out:st=2.5:d=0.5[v1] ;[2:v]trim=duration=3,fade=t=in:st=0:d=0.5,fade=t=out:st=2.5:d=0.5[v2] ;[3:v]trim=duration=3,fade=t=in:st=0:d=0.5,fade=t=out:st=2.5:d=0.5[v3] ;[v0][v1][v2][v3]concat=n=4:v=1:a=0,format=yuv420p[v]
    -map [v] -preset ultrafast /sdcard/videokit/fourImageSecond.mp4" ;

    And also look at this link as i want to create same effects but it works for same resolution image only.

    So my question is, how can I create video from images with slideshow effects using ffmpeg ?

    Any help would be highly appreciable.