Generate ffmpeg thumbnail from stream in Node.js - node.js

Question

Im using node.js together with ffmpeg to receive an rtmp-stream and output this into m3u8-format.
[ '-y',
'-fflags',
'nobuffer',
'-analyzeduration',
'1000000',
'-i',
'rtmp://localhost:1935/live/ANMZJ2ZRUiMhKaAoygRXwAfHe',
'-c:v',
'copy',
'-c:a',
'aac',
'-f',
'tee',
'-map',
'0:a?',
'-map',
'0:v?',
'-y',
'-an',
'[hls_time=10:hls_list_size=0]./media/live/ANMZJ2ZRUiMhKaAoygRXwAfHe/SX3otgDdf6/index.m3u8|' ]
Together with this functionality I would also like to output a thumbnail. I tried to do this using the following format but without success.
[ '-y',
'-fflags',
'nobuffer',
'-analyzeduration',
'1000000',
'-i',
'rtmp://localhost:1935/live/ANMZJ2ZRUiMhKaAoygRXwAfHe',
'-c:v',
'copy',
'-c:a',
'aac',
'-f',
'tee',
'-map',
'0:a?',
'-map','0:v?',
'-y',
'-an',
'-vf' ,
'fps=1',
'C:/Users/media/out.png'
'[hls_time=10:hls_list_size=0]./media/live/ANMZJ2ZRUiMhKaAoygRXwAfHe/SX3otgDdf6/index.m3u8|' ]
The way I send this information to ffmpeg is by
this.ffmpeg_exec = spawn(ffmpeg_path, args);
Im unable to create a thumbnail using this approach. Does anyone know the problem/solution?

Answer 1

You have a log of extra arguments in the second command! You really only need the input, number of frames, and output.
[ '-i',
'rtmp://localhost:1935/live/ANMZJ2ZRUiMhKaAoygRXwAfHe',
'-frames:v',
'1',
'C:/Users/media/out.png'
]
Docs for -frames:v
https://ffmpeg.org/ffmpeg.html#Video-Options

Answer 2

fluent-ffmpeg support stream input and output :
var FfmpegCommand = require('fluent-ffmpeg');
var ffmpeg = FfmpegCommand();
ffmpeg.input(stream)
.seekInput("00:00:01.000")
.outputFormat("image2")
.pipe(res,{end:true});