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Telecommunication-Telemedia-Assessment / bitstream_mode3_p1204_3

Open source reference implementation of ITU-T P.1204.3
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cpu_count didn't work #13

Closed AnnieXuY closed 4 years ago

AnnieXuY commented 4 years ago

Hello guys, Thank you for providing this reference implementation. I did some test, and results of this project are indeed more accurate than vmaf. However time consuming is not an advantage. I found that the project provides the --cpu_count parameter, but no matter what number is set, the actual cpu_count is still 1. I wonder if this is a bug?

The test environment was as follows： Linux version 3.10.0-229.el7.x86_64 (gcc version 4.8.2 ) Python 3.6.6 cpu info: Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz processor: 24 cpu cores : 6

The command line is as follows： poetry run p1204_3 --cpu_count 4 test_videos/test.mp4

How do I set it up to enable multiprocessing to improve the efficiency of the program?

Looking forward to a response.

BR, Annie

slhck commented 4 years ago

The CPU count parameter affects the parallel processing of many files. The way the parsing of bitstream information works is that it can only run single-threaded, so any parallelism must be achieved by calculating the scores on many video files or segments in parallel. I hope this clarifies your question.

AnnieXuY commented 4 years ago

I understand and thank you for your response.