Netflix/vmaf

libvmaf API does not support `perc*` pool methods

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#818 建立於 2021年2月1日

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 (3 留言) (0 反應) (0 負責人)Python (3,829 star) (700 fork)batch import
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描述

The libvmaf API used by ffmpeg does not support the perc5, perc10, perc20 pooling methods. Furthermore attempting to pass one of these values will silently fallback to mean as the pooling method due to the implementation in pool_method_map, leading to a confusing user experience (even though the documentation mentions that only min, mean and harmonic_mean are supported).

It would be great to either unify the pooling methods such that perc* works, or to perhaps consider returning an error if an unsupported pooling method is requested.

貢獻者指南

技術棧
pythonc
領域
apibackend
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Basic understanding of libvmaf APIFamiliarity with pool method map
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
60
研究方向
Examine the pool method map in libvmaf to understand how pool methods are currently mapped. Determine if adding percentile based methods (perc5, perc10, perc20) is feasible by implementing a percentile pooling function, or alternatively add an error when an unsupported method is passed. Check existing contributions or comments for additional context. Update documentation to reflect supported pool methods.