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• How can I add a random watermark to a video during processing in Node.js and Express.js using FFmpeg ?

  3 avril 2023, par Ariful islam

  I want to add a watermark to a video that changes randomly during processing. I am using Node.js and Express.js with FFmpeg. Currently, I am able to add a static watermark to the video using the drawtext filter. However, I want to change the watermark text randomly every few seconds.

  


  How can I achieve this using FFmpeg in my Node.js and Express.js app ? Here's my current code :

  


  const email = 'name@gmail.com';
app.post('/addwatermark', upload.single('video'), (req, res) => {
const fileName = path.basename(req.file.path) + '.mp4';
const outputPath = `public/reduceSize/${fileName}`;
const outputPathWithWatermark = `public/reduceSize/${fileName}-wm.mp4`;
let watermarkPosition = { x: 10, y: 650 };

// Create the directory if it doesn't exist
const outputDir = path.dirname(outputPathWithWatermark);
if (!fs.existsSync(outputDir)) {
    fs.mkdirSync(outputDir, { recursive: true });
}

// Send a comment to keep the connection alive
res.write(': ping\n\n');

// Function to randomly generate watermark position
const changeWatermarkPosition = () => {
    watermarkPosition = { x: Math.floor(Math.random() * 100), y: Math.floor(Math.random() * 100) };
};

// Change watermark position every 5 seconds 
setInterval(changeWatermarkPosition, 5000);
const watermarkStyle = `-vf drawtext=text='${email}':x=(w-text_w-10):y=(h-text_h-10):fontcolor=white:fontsize=24:shadowcolor=black:shadowx=1:shadowy=1:box=1:y=${watermarkPosition.y}:fontcolor=red:fontsize=24:shadowcolor=black:shadowx=1:shadowy=1:box=1:boxcolor=black@0.5`

ffmpeg(req.file.path)
    .addOption(watermarkStyle)
    .output(outputPathWithWatermark)
    .videoCodec('libx264')
    .audioCodec('aac')
    .size('50%')
    .on('error', (err) => {
        console.error(`FFmpeg error: ${err.message}`);
        res.status(500).json({ message: err.message });
    })
    .on('progress', (progress) => {
        // Set the watermark position every 5 seconds randomly
        changeWatermarkPosition();

        const mb = progress.targetSize / 1024;
        const data = {
            message: `Processing: ${mb.toFixed(2)} MB converted`,
            watermark: `Adding watermark to video: ${progress.framesProcessed} frames processed`
        };
        console.log(data.message);
        res.write(`data: ${JSON.stringify(data)}\n\n`);

    })
    .on('end', () => {
        console.log(`Video successfully converted to ${outputPathWithWatermark}`);
        // Remove the temporary file
    })
    .run();
 });


  


  I want to secure my video from unauthorized person by using email in a video and the email will be move around the video randomly every 5 seconds.

  


  I have read this (Add dynamic watermark that randomly changes position over video React/Node) document but didn't get any solution.

  


• ffmpeg installation undefined reference to

  8 février 2017, par user1683302

  I used this official link to download ffmpeg and compile it. I know it creates a static library and I have to reference the library folder. When i try to compile this tutorial . i get this errors

  tutorial01.c: In function ‘main’:
  
  tutorial01.c:96:5: warning: ‘codec’ is deprecated [-Wdeprecated- declarations]
  
   if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
  
   ^
  
  In file included from tutorial01.c:27:0:
  
   /home/osboxes/ffmpeg_build/include/libavformat/avformat.h:893:21: note:  declared here
  
   AVCodecContext *codec;
  
                   ^
  
  tutorial01.c:104:3: warning: ‘codec’ is deprecated [-Wdeprecated-declarations]
  
  pCodecCtxOrig=pFormatCtx->streams[videoStream]->codec;
  
  ^
  
  In file included from tutorial01.c:27:0:
  
  /home/osboxes/ffmpeg_build/include/libavformat/avformat.h:893:21: note: declared here
  
   AVCodecContext *codec;
  
                   ^
  
  tutorial01.c:113:3: warning: ‘avcodec_copy_context’ is deprecated  [-Wdeprecated-declarations]
  
   if(avcodec_copy_context(pCodecCtx, pCodecCtxOrig) != 0) {
  
   ^
  
  In file included from tutorial01.c:26:0:
  
  /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4240:5: note: declared here
  
  int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
  
   ^
  
  tutorial01.c:131:3: warning: ‘avpicture_get_size’ is deprecated   [-Wdeprecated-declarations]
  
   numBytes=avpicture_get_size(AV_PIX_FMT_RGB24, pCodecCtx->width,
  
   ^
  
   In file included from tutorial01.c:26:0:
  
   /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:5467:5: note: declared here
  
   int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
  
   ^
  
    tutorial01.c:138:3: warning: ‘avpicture_fill’ is deprecated [-Wdeprecated-declarations]
  
     avpicture_fill((AVPicture *)pFrameRGB, buffer, AV_PIX_FMT_RGB24,
  
     ^
  
    In file included from tutorial01.c:26:0:
  
    /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:5452:5: note: declared here
  
    int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
  
   ^
  
     tutorial01.c:160:7: warning: ‘avcodec_decode_video2’ is deprecated [-Wdeprecated-declarations]
  
         avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
  
         ^
  
   In file included from tutorial01.c:26:0:
  
    /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4811:5: note: declared here
  
    int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
  
   ^
  
    tutorial01.c:177:5: warning: ‘av_free_packet’ is deprecated [-Wdeprecated-declarations]
  
    av_free_packet(&packet);
  
    ^
  
   In file included from tutorial01.c:26:0:
  
   /home/osboxes/ffmpeg_build/include/libavcodec/avcodec.h:4472:6: note: declared here
  
   void av_free_packet(AVPacket *pkt);
  
    ^
  
  /tmp/ccHYDd9j.o: In function `main':
  
  tutorial01.c:(.text+0x178): undefined reference to `av_register_all'
  
  tutorial01.c:(.text+0x19f): undefined reference to `avformat_open_input'
  
  tutorial01.c:(.text+0x1c1): undefined reference to `avformat_find_stream_info'
  
  tutorial01.c:(.text+0x1f6): undefined reference to `av_dump_format'
  
  tutorial01.c:(.text+0x2ab): undefined reference to `avcodec_find_decoder'
  
  tutorial01.c:(.text+0x2ea): undefined reference to `avcodec_alloc_context3'
  
  tutorial01.c:(.text+0x304): undefined reference to `avcodec_copy_context'
  
  tutorial01.c:(.text+0x348): undefined reference to `avcodec_open2'
  
  tutorial01.c:(.text+0x35b): undefined reference to `av_frame_alloc'
  
  tutorial01.c:(.text+0x367): undefined reference to `av_frame_alloc'
  
  tutorial01.c:(.text+0x3a4): undefined reference to `avpicture_get_size'
  
  tutorial01.c:(.text+0x3ba): undefined reference to `av_malloc'
  
  tutorial01.c:(.text+0x3ef): undefined reference to `avpicture_fill'
  
  tutorial01.c:(.text+0x439): undefined reference to `sws_getContext'
  
  tutorial01.c:(.text+0x47d): undefined reference to `avcodec_decode_video2'
  
  tutorial01.c:(.text+0x4de): undefined reference to `sws_scale'
  
  tutorial01.c:(.text+0x527): undefined reference to `av_free_packet'
  
  tutorial01.c:(.text+0x53d): undefined reference to `av_read_frame'
  
  tutorial01.c:(.text+0x551): undefined reference to `av_free'
  
  tutorial01.c:(.text+0x560): undefined reference to `av_frame_free'
  
  tutorial01.c:(.text+0x56f): undefined reference to `av_frame_free'
  
  tutorial01.c:(.text+0x57b): undefined reference to `avcodec_close'
  
  tutorial01.c:(.text+0x58a): undefined reference to `avcodec_close'
  
  tutorial01.c:(.text+0x599): undefined reference to `avformat_close_input'
  
  collect2: error: ld returned 1 exit status

  i used this sudo gcc -I /home/osboxes/ffmpeg_build/include -L /home/osboxes/ffmpeg_build/lib -lavcode -lavformat -lavutil -lswscale -lz -lm tutorial01.c

  my ffmpeg is

   ffmpeg version N-82113-g490c6bd Copyright (c) 2000-2016 the FFmpeg developers
  
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 20160609
  
     configuration: --prefix=/home/osboxes/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/osboxes/ffmpeg_build/include --extra-ldflags=- L/home/osboxes/ffmpeg_build/lib --bindir=/home/osboxes/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libopus --enable-libx264 --enable-nonfree
  
    libavutil      55. 33.100 / 55. 33.100
  
    libavcodec     57. 63.103 / 57. 63.103
  
    libavformat    57. 55.100 / 57. 55.100
  
    libavdevice    57.  0.103 / 57.  0.103
  
    libavfilter     6. 64.100 /  6. 64.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  2.100 /  2.  2.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  the tutorial code was update to work on new ffmpeg versions.I’m using VM Ubuntu 16.0.4 64 bit fresh install on windows 10 host.

  so why I’m having all of these errors ?

  Update :
  I moved to Ubuntu 12.04 VM and ffmpeg 0.11, I instilled it with opencv 2.4.2 here is the link . This should work yet i don’t why I’m having hard time compiling such small program.

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
   built on Oct 25 2016 13:39:37 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame    --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-shared --enable-pic
  
   libavutil      51. 54.100 / 51. 54.100
  
   libavcodec     54. 23.100 / 54. 23.100
  
   libavformat    54.  6.100 / 54.  6.100
  
   libavdevice    54.  0.100 / 54.  0.100
  
   libavfilter     2. 77.100 /  2. 77.100
  
   libswscale      2.  1.100 /  2.  1.100
  
   libswresample   0. 15.100 /  0. 15.100
  
   libpostproc    52.  0.100 / 52.  0.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  yet i still have the problem but it is less sever

   gcc -o tutorial01 tutorial01.c -Wl,--start-group -lavcodec -lavformat  -lswscale -lavutil -lz -lm -Wl,--end-group     
  
    /tmp/ccnFfu84.o: In function `main':
  
    tutorial01.c:(.text+0x500): undefined reference to `avcodec_free_frame'
  
    tutorial01.c:(.text+0x511): undefined reference to `avcodec_free_frame'
  
    collect2: ld returned 1 exit status

  i tried this ldconfig -p | grep av

    libxklavier.so.16 (libc6,x86-64) => /usr/lib/libxklavier.so.16
  
    libwavpack.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux gnu/libwavpack.so.1
  
  libjavascriptcoregtk-3.0.so.0 (libc6,x86-64) => /usr/lib/libjavascriptcoregtk-3.0.so.0
  
  libdvdnavmini.so.4 (libc6,x86-64) => /usr/lib/libdvdnavmini.so.4
  
  libdvdnav.so.4 (libc6,x86-64) => /usr/lib/libdvdnav.so.4
  
  libavutil.so.51 (libc6,x86-64) => /usr/local/lib/libavutil.so.51
  
  libavutil.so.51 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavutil.so.51
  
  libavutil.so (libc6,x86-64) => /usr/local/lib/libavutil.so
  
  libavformat.so.54 (libc6,x86-64) => /usr/local/lib/libavformat.so.54
  
  libavformat.so.53 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavformat.so.53
  
  libavformat.so (libc6,x86-64) => /usr/local/lib/libavformat.so
  
  libavfilter.so.2 (libc6,x86-64) => /usr/local/lib/libavfilter.so.2
  
  libavfilter.so (libc6,x86-64) => /usr/local/lib/libavfilter.so
  
  libavdevice.so.54 (libc6,x86-64) => /usr/local/lib/libavdevice.so.54
  
  libavdevice.so (libc6,x86-64) => /usr/local/lib/libavdevice.so
  
  libavc1394.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavc1394.so.0
  
  libavcodec.so.54 (libc6,x86-64) => /usr/local/lib/libavcodec.so.54
  
  libavcodec.so.53 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavcodec.so.53
  
  libavcodec.so (libc6,x86-64) => /usr/local/lib/libavcodec.so
  
  libavahi-ui-gtk3.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-ui-gtk3.so.0
  
  libavahi-gobject.so.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-gobject.so.0
  
  libavahi-glib.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-glib.so.1
  
  libavahi-core.so.7 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-core.so.7
  
  libavahi-common.so.3 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
  
  libavahi-common.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-common.so
  
  libavahi-client.so.3 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-client.so.3
  
  libavahi-client.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libavahi-client.so

  Update2

  I changged avcodec_free_frame to av_free and the file complied

  Dranger code is old

  Update 3
  i downloaded ffmpeg 1.0.10 which has the same library version that is the tutorial tested on. Everything complied without any problem now.

• Convert MP4 Version - FFmpeg

  17 mai 2017, par Luzwitz

  I have two mp4 File :

  1. out.mp4 : ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
  2. video/rio2016/finale/brasse/200.mp4 : ISO Media, MP4 v2 [ISO 14496-14]

  How can I convert 1 to 2 (mp41 to mp42) ?

  Thanks !