Node-fluent-ffmpeg: How to draw text?

[jsamos]

Hi I am trying to do the equivalent of
ffmpeg -i video.mp4 -vf \
drawtext="fontfile=LucidaGrande.ttc: \
text='THIS IS TEXT':fontsize=20:fontcolor=white:x=(main_w/2-text_w/2):y=100: shadowcolor=black:shadowx=2:shadowy=2" \
with_text3.mp4

I have tried
.videoFilters([drawtext="LucidaGrande.ttc: text='THIS IS TEXT':fontsize=20:fontcolor=white:x=(main_w/2-text_w/2):y=50:shadowcolor=black:shadowx=2:shadowy=2"])

but i get "ffmpeg exited with code 1: Error opening filters!"

is there another method i should be using?

[njoyard]

For more info about the error please give the full ffmpeg output:

command.on('error', function(err, stdout, stderr) {
   console.log('error: ' + err.message);
   console.log('stdout: ' + stdout);
   console.log('stderr: ' + stderr);
});

Most likely you have an escaping error in your filter string. Try using a filter spec object instead:

command.videoFilters({
  filter: 'drawtext',
  options: {
    fontfile: 'Lucida Grande.ttf',
    text: 'THIS IS TEXT',
    /* etc. */
  }
});

[jsamos]

ya that looks like it. Thanks for your prompt response!

The top line is what I am feeding in, but looks like single quotes being stripped.

drawtext="fontfile=/vagrant/fonts/LucidaGrande.ttc: text='THIS IS TEXT':fontsize=20:fontcolor=white:x=(main_w/2-text_w/2):y=50:shadowcolor=black:shadowx=2:shadowy=2"

error: ffmpeg exited with code 1: Error opening filters!

stdout:
stderr: ffmpeg version 1.2.6-7:1.2.6-1~trusty1 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --arch=amd64 --disable-stripping --enable-avresample --enable-pthreads --enable-runtime-cpudetect --extra-version='7:1.2.6-1~trusty1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 53. 5.103 / 53. 5.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/vagrant/app/storage/032a63a5-619e-4304-96c1-a7cbc3bb0a87/temp/video.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.63.104
Duration: 00:00:02.25, start: 0.000000, bitrate: 1380 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p, 956x474, 1377 kb/s, 8 fps, 8 tbr, 16384 tbn, 16 tbc
Metadata:
handler_name : VideoHandler
[drawtext @ 0x1c817c0] Key '"fontfile' not found.
[AVFilterGraph @ 0x1c719e0] Error initializing filter 'drawtext' with args '"fontfile=/vagrant/fonts/LucidaGrande.ttc: text=THIS IS TEXT:fontsize=20:fontcolor=white:x=(main_w/2-text_w/2):y=50:shadowcolor=black:shadowx=2:shadowy=2"'
Error opening filters!

[njoyard]

Yeah, the problem is most likely due to double quotes. You don't need those outside of your shell. But for a more pleasant experience, I still recommend using filter spec objects :)

[jsamos]

will do, also seeing that '"fontfile' not found?

[njoyard]

Because double quotes are passed to ffmpeg when you're not in the shell. The filter engine looks for an option named "fontfile in the filter and does not find it, I guess.

[jsamos]

got it, and yes this works. Thanks again!

.videoFilters({
  filter: 'drawtext',
  options: {
    fontfile:'/vagrant/fonts/LucidaGrande.ttc',
    text: 'THIS IS TEXT',
    fontsize: 20,
    fontcolor: 'white',
    x: '(main_w/2-text_w/2)',
    y: 50,
    shadowcolor: 'black',
    shadowx: 2,
    shadowy: 2
  }
})