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• unable to successfully close ffmpeg stream in node.js

  25 septembre 2022, par K. Russell Smith

  i'm trying to write a node video app that generates frames using the canvas api (via node-canvas, the project's only npm dependancy right now), and writes it to ffmpeg via a stream to generate a video :

  


  const { createCanvas } = require('canvas');
const { spawn } = require('child_process');
const fs = require('fs');
const canvas = createCanvas(1280, 720);

const ffmpeg = spawn('ffmpeg', [
    '-y',
    '-f', 'rawVideo',
    '-vcodec', 'rawVideo',
    '-pix_fmt', 'rgb24',
    '-s', `${ canvas.width }x${ canvas.height }`,
    '-r', '40',
    '-i', '-', '-f', 'mp4',
    '-q:v', '5',
    '-an', '-vcodec', 'mpeg4', 'output.mp4',
]);

const ctx = canvas.getContext('2d');
ctx.font = '30px Prime';
ctx.fillStyle = 'blue';
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
ctx.fillText('Hello Canvas', canvas.width / 2, canvas.height / 2);

for (let i = 0; i < 250; ++i)
{
    console.log(i);
    ffmpeg.stdin.write(Buffer.from(ctx.getImageData(0, 0, canvas.width, canvas.height).data));
}
ffmpeg.stdin.end();


  


  unfortunately, when i run it, the program throws this after writing the frames :

  


  node:events:368
      throw er; // Unhandled 'error' event
      ^

Error: write EPIPE
    at WriteWrap.onWriteComplete [as oncomplete] (node:internal/stream_base_commons:98:16)
Emitted 'error' event on Socket instance at:
    at emitErrorNT (node:internal/streams/destroy:164:8)
    at emitErrorCloseNT (node:internal/streams/destroy:129:3)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  errno: -32,
  code: 'EPIPE',
  syscall: 'write'
}

Node.js v17.1.0


  


  what am i doing wrong ?

  


• FFmpeg command to draw text hindi font is working fine in windows command prompt but Batch script and simple CPP program in NOT working

  1er juillet 2022, par Abdullah Farweez

  Below ffmpeg command in working fine in command prompt

  


  ffmpeg -i video.mp4 -filter_complex "drawtext=fontfile=Khula-regular.ttf:fontsize=60:fontcolor=blue:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200" output.mp4


  


  giving expected result


  


  But if we run it as a bat file, it is not giving the expected output

  


      ::bat script start 
    @echo off
    ffmpeg -i video.mp4 -filter_complex "drawtext=fontfile=Khula-Regular.ttf:fontsize=60:fontcolor=blue:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200" output.mp4
:: bat script end


  


  This the CPP program which calling the ffmpeg command via system method

  


  #include <iostream>&#xA;#include <cstring>&#xA;#include &#xA;&#xA;using namespace std;&#xA;&#xA;int main()&#xA;{&#xA;  string command = "ffmpeg.exe -i video.mp4 -filter_complex \"drawtext=fontfile=Khula-Regular.ttf:fontsize=60:fontcolor=yellow:text=अगला एपिसोड देखने के लिए जल्दी से फॉलो करें:x=30:y=200\" output.mp4";&#xA;  system(command.c_str());&#xA;  return 0;&#xA;}&#xA;</cstring></iostream>

  


  same behavior as bat script.

  


  screenshot of the output video.


  


  Here is the additional information for the references

  


  Folder structure

  


  .
|-- Khula-Regular.ttf
|-- cpp_program.exe
|-- command.cpp
|-- ffmpeg.exe
|-- ffplay.exe
|-- ffprobe.exe
|-- output.mp4
|-- run.bat
`-- video.mp4

C:\bin


  


  FFmpeg info

  


  $ ffmpeg
ffmpeg version N-107262-g4454142782-20220628 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220628
  libavutil      57. 27.100 / 57. 27.100
  libavcodec     59. 34.100 / 59. 34.100
  libavformat    59. 25.100 / 59. 25.100
  libavdevice    59.  6.100 / 59.  6.100
  libavfilter     8. 41.100 /  8. 41.100
  libswscale      6.  6.100 /  6.  6.100
  libswresample   4.  6.100 /  4.  6.100
  libpostproc    56.  5.100 / 56.  5.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'


  


  PS : FFmpeg does not showing any error while processing in bat or cpp_program, but output is not giving in the specified font instead giving in random characters in the final output.mp4

  


• Error installing ffmpeg on Ubuntu 8.04 JeOS with Speex

  15 novembre 2011, par tubbo

  I'm having an issue installing ffmpeg with Speex support on Ubuntu 8.04 JeOS. After some wandering around in dependency hell I managed to secure the proper libspeex and ffmpeg versions, and it ./configured properly, but when I try to run make && make install, it fails with the following error :

  ffmpeg.c: In function ‘opt_recording_timestamp’:
  
  ffmpeg.c:3080: warning: dereferencing type-punned pointer will break strict-aliasing rules
  
  ffmpeg.c: In function ‘opt_input_file’:
  
  ffmpeg.c:3312: warning: ‘loop_input’ is deprecated (declared at libavformat/avformat.h:919)
  
  ffmpeg.c: In function ‘opt_output_file’:
  
  ffmpeg.c:4086: warning: ‘loop_output’ is deprecated (declared at libavformat/avformat.h:895)
  
  ffmpeg.c: In function ‘opt_map’:
  
  ffmpeg.c:2873: warning: ‘sync_stream_idx’ may be used uninitialized in this function
  
  CC  cmdutils.o
  
  LD  ffmpeg_g
  
  libavcodec/libavcodec.a(libspeexdec.o): In function `libspeex_decode_close':
  
  /home/tom/src/ffmpeg/libavcodec/libspeexdec.c:144: undefined reference to `speex_header_free'
  
  libavcodec/libavcodec.a(libspeexenc.o): In function `encode_init':
  
  /home/tom/src/ffmpeg/libavcodec/libspeexenc.c:224: undefined reference to `speex_header_free'
  
  /home/tom/src/ffmpeg/libavcodec/libspeexenc.c:215: undefined reference to `speex_header_free'
  
  collect2: ld returned 1 exit status
  
  make: *** [ffmpeg_g] Error 1

  I'm a complete noob to ffmpeg and speex, except for using the codec on Ventrilo back in the day. Can someone shed some light as to why this is happening ?