Request: pre and post processing

[lars18th]

Hi,

The prescript and postscript functions are very useful to start/stop some external process. However, I request if some "pre-processing" and "post-processing" of the TS can be done. At time only the ffmpeg process can receive data and generate the TS. But my request is about something like:

PRE-PROCESS ---/ pipe /---> FFMPEG ---/ pipe /---> POST-PROCESS >>> node-ffmpeg-mpegts-proxy

The idea is to feed the ffmpeg with an external tool, or do a change in the TS from the ffmpeg process to replace some data.

You agree?

[Jalle19]

Could become quite complicated, I have to think about it a bit.

[lars18th]

Could become quite complicated, I have to think about it a bit.

OK. I hope you can found a simple solution.

Thank you for listening! 😉

[lars18th]

Hi @Jalle19 ,

After more thinking on this, I have a different proposal to achieve the same objective.

First, think on this: If we want to preprocess and postprocess the TS, we can use three chained calls. A chained call is when the source URL is a call to the server itself for a different program. For example we can configure /channel1-pre, /channel1 and /channel1-post. Then the "channel1-post" can feed from the "channel1", and that from the "channel1-pre".

So the only requisite to implement this is that we can process the program using another different binary instead of the avconv. In this case, the "channel1-pre" and "channel1-post" will not use the ffmpeg and the result will be the same.

And in order to implement this, perhaps it's sufficient to support another different module than avconv.js. For example, you can provide support for a generic binary (ex generic-child.js). Or to support a simple tool (for example socat.js) and after we can modify the source or copy-and-paste to create a new module.

What you think?