Stuck in the cutting - merging process

[RCapolungo]

Hello,

i'm having a problem during the cutting - marging phase. i'm using windows 10 as OS, ffmpeg 4.2.2 and python 3.8.6 . i don't know if it's a ffmpeg or a program problem but it gets stuck after creating 2 of the 6 instances and only one working (it stop working after cutting 6 packages).

i'll leave here a photo of the console.

[pokemaniac05]

May you send here RAM size, CPU type, Win10 build and other useful information to reproduce this issue? Did you install all requirements from requirements. md? May you install the latest version of ffmpeg (4.3.1)? Did you compile ffmpeg and/or python from source or download the precompiled version from official websites.

[RCapolungo]

Sure. 16 GB RAM AMD Ryzen 5 3600 Windows 10 build 18363

All requirements has been installed. I also update ffmpeg to 4.3.1 and unfortunately the problem is still there. ffmpeg is precompiled, while i got python from the installer on https://www.python.org/downloads/ so at the end it should be precompiled too.

[morrolinux]

What's your CPU and memory usage during "stuck" execution? For how long did you see it stuck before giving up? The ffmpeg process stdout and stderr is suppressed in https://github.com/morrolinux/simple-ehm/blob/11e90f9eb25f03209ef9db077da7bf708439666a/simple_ehm-runnable.py#L243 You can remove stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE to let the shell print watever ffmpeg is outputting and maybe there's some useful clue to what's really happening and why the process is stuck

[RCapolungo]

I followed your suggestion and removed these arguments and it starts working fine until last frame :( idk why but when arrives the last frame ffmpeg stops working.

This is a screenshot of the task manager.

This is a file of the subprocess output.txt

[morrolinux]

For how long did you see it stuck before giving up?

[RCapolungo]

Almost half an hour

[morrolinux]

Yeah, try to let it go for 1 hour or so just to be sure it's not an ffmpeg (slow) seek issue. Also try with a different video file and see if anything changes

[RCapolungo]

Ok, so i let it go for 2 h 45 min and nothing happend, the last ffmpeg process was stuck at 0% of CPU usage for the whole time. I tried on multiple files and i noticed that if they last less than 10 minutes the last ffmepg process ends. i'm not sure what is the duration limit before the process stops working but for sure for 1 h files it get stuck

[morrolinux]

That's odd... But now that I think about it, you probably should remove shell output piping from the merge command which is on another line

Il mar 15 dic 2020, 15:27 RCapolungo notifications@github.com ha scritto:

Ok, so i let it go for 2 h 45 min and nothing happend, the last ffmpeg process was stuck at 0% of CPU usage for the whole time. I tried on multiple files and i noticed that if they last less than 10 minutes the last ffmepg process ends. i'm not sure what is the duration limit before the process stops working but for sure 1 h files get stuck

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[RCapolungo]

Yes, the problem was the stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE in this lines. https://github.com/morrolinux/simple-ehm/blob/11e90f9eb25f03209ef9db077da7bf708439666a/simple_ehm-runnable.py#L82 https://github.com/morrolinux/simple-ehm/blob/11e90f9eb25f03209ef9db077da7bf708439666a/simple_ehm-runnable.py#L243 https://github.com/morrolinux/simple-ehm/blob/11e90f9eb25f03209ef9db077da7bf708439666a/simple_ehm-runnable.py#L266

i've just removed them and now it's working perfectly

Thanks for your help