search

Haivision / srt

Secure, Reliable, Transport
https://www.srtalliance.org
Mozilla Public License 2.0
3.12k stars 851 forks source link

When remuxing SRT to MPEGTS using FFMPEG, CPU slowly grows. (Windows) #869

Closed squinn92 closed 4 years ago

squinn92 commented 5 years ago

I am using the following command line to grab an SRT stream from a Matrox Edge encoder. Over time, CPU slowly climbs until we hit 100% on the system. I need to copy the PTS times from the source stream to the destination to maintain stream sync between devices, if I use -re before the -i and don't use -copyts, I don't see this problem, but in my workflow I need -copyts.

ffmpeg -i srt://0.0.0.0:1050?mode=listener -c copy -copyts -y test.ts

I am guessing the timestamps being ahead of real-time is causing some sort of problem. Any pointers would be appreciated.

ethouris commented 5 years ago

Just to let you know - we are aware of several issues related to CPU usage on Windows. We have some ongoing work to replace the threads and timers, and on Windows there will be used only those from C++11 standard library. The Windows version is using currently some 3rd party wrappers, which don't provide best emulation and accuracy.

squinn92 commented 5 years ago

Is the refactoring work mentioned above expected to be part of the #800 pull request? If so, is there an ETA on when that work may get back to mainline? Thanks.

ethouris commented 5 years ago

Hard to say, we are in the middle of autumn vacation time, surprisingly. In about two weeks (when we are all back) we will likely have a defined date for 1.4.1 release. Anything else I'd tell you about it would be a speculation.

maxsharabayko commented 4 years ago

Hi @squinn92 We've merged recently PR #929. It introduces steady clock (monotonic) timers. Please check if it resolves this issue.

squinn92 commented 4 years ago

It did seem to fix the problem! Thank you for reaching out. I’ve been running my workflow for over 30 minutes now with no CPU increase. I’ll keep testing to be sure, but looks good.

Steve

From: Maxim Sharabayko notifications@github.com Sent: Friday, December 20, 2019 6:43 AM To: Haivision/srt srt@noreply.github.com Cc: squinn92 scq@comcast.net; Mention mention@noreply.github.com Subject: Re: [Haivision/srt] When remuxing SRT to MPEGTS using FFMPEG, CPU slowly grows. (Windows) (#869)

Hi @squinn92 https://github.com/squinn92 We've merged recently PR #929 https://github.com/Haivision/srt/pull/929 . It introduces steady clock (monotonic) timers. Please check if it resolves this issue.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/Haivision/srt/issues/869?email_source=notifications&email_token=AH37KFC3PNPSIH5GAKHWSLDQZSVVPA5CNFSM4IVT3YW2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEHMW4KA#issuecomment-567897640 , or unsubscribe https://github.com/notifications/unsubscribe-auth/AH37KFAFLTCPSYVYN42UDJTQZSVVPANCNFSM4IVT3YWQ . https://github.com/notifications/beacon/AH37KFGVAEZGQIAINUKA44DQZSVVPA5CNFSM4IVT3YW2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEHMW4KA.gif

maxsharabayko commented 4 years ago

Closing as resolved by #929. Fell free to reopen if the problem still persists. Related issue #669