You've exhausted the threadpool. Try setting the UV_THREADPOOL_SIZE env var
higher and see if you can spawn more.
On Sun, Jun 28, 2015 at 1:12 PM, Ofir Attia <ofirat...@gmail.com> wrote:
> The server is waiting for request, for each request I am take a video
> input ( it can be RTSP input, video file .. ) and output it as 1 image.
> for example -
>
> this.stream = child_process.spawn("ffmpeg", [ "-i", this.url,
> "-rtsp_transport", "tcp",'-f', 'mpeg1video', '-b:v', '800k', '-r', '30',
> '-'], {
> detached: false
> });
>
> this.inputStreamStarted = true;
> this.stream.stdout.on('data', function(data) {
> return self.emit('mpeg1data', data);
> });
> this.stream.stderr.on('data', function(data) {
> return self.emit('ffmpegError', data);
> });
>
> this is part of the code in the object I wrote, just spawning this child
> process and wait for events in the wrapper.
>
> Its not a problem that the solution is clustering or queue because each
> request execute at the moment its arrive. When I open the Task Manager
>
> I can see only 5 process of ffmpeg.exe , I tried to create manually the
> process from the cmd line and still, the maximum is 4~5 processes.
>
> Any Idea?
>
>
> On Sunday, June 28, 2015 at 1:43:35 AM UTC+3, ryandesign wrote:
>>
>>
>> On Jun 27, 2015, at 3:16 AM, Ofir Attia wrote:
>>
>> > I facing with issue of nodejs and spawning child process.
>> > I have noticed that I can spawn at max 5 instances of ffmpeg instances.
>> > I have a server that listen for requests and each request parsed as
>> ffmpeg instance that working for 5 minutes.
>> > The problem is that the number of the instances is limited for 5 I cant
>> get more instances.
>> >
>> > I would like to get some advice in this subject, if you faced with
>> this issue ( Not necessarily with ffmpeg ) .
>>
>> The web server probably shouldn't spawn long-running processes. Instead,
>> have a separate process to do long-running work, and find a way to
>> communicate between the web server process and the long-running work
>> process. For example, using redis is popular. npm has several modules for
>> helping you manage a work queue.
>>
>> However... I'm not sure why spawning more than 5 processes from a web
>> server would be a problem. I'd need to see some code demonstrating the
>> problem.
>>
>> --
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