Capturing live stream/program in max file size with continuous overwrite?

[barbywasadream]

Hi guys.

Let's say I have an M3U8 manifest and want to download/map ID:0. I could use this basic command: ffmpeg -i "M3U8URL" -map p:0 -c copy out.ts .

However that file just keeps growing in size and it does not have overwrite function. What I would really like and what I am trying to achieve is having a single file per stream which I can play at any time which will have a buffer of let's say 60 seconds. The file should be overwritten continuously and as such not grow beyond a certain size.

Is there any way to achieve this? I am on both Windows and Linux if either is easier.


Thx,

[notaghost]

Use output into a FIFO file or pipe
Buffer can be set in the ffmpeg command

[barbywasadream]

Thanks notaghost. Can you give me an example command of this? And would this be on Windows or Linux?

[notaghost]

Why don't you use ffmpeg to create M3U8 segments from a live M3U8 stream, where old segments are replaced and the file size remains relatively stable?

[barbywasadream]

That sounds like a good solution. However I need one file, so that I can play it and have it continue playing. Should I concatenate them then and how would I ensure that the file does not become too big? Let's say I want it max 100MB or even better a buffer of 10 seconds.

[aqzs]

You can create a rtp server with ffmpeg to do that.