[编码时间显示错误]Linux fps计算错误 显示编码时间比实际时间长较多倍

[Yang-Xijie]

版本信息：Linux, Ubuntu 18.04.2 LTS, uavs3e version: 1.2.208_release

编码使用脚本：

import os
import time

uavs3_v1_2_208 = "/home/yxj/yangxijie/software/git/uavs3e/build/linux/uavs3enc"

yuv_video = "/mnt/video/E/FourPeople_1280x720_60.yuv"
yuv_width = '1280'
yuv_height = '720'
yuv_fps = '60'

set_qp = '45'
set_speed_level = '3'

coding_video = ' ./uavs3e.avs3'

begin_time = time.time()
cmd = uavs3_v1_2_208 + ' --speed_level ' + set_speed_level + ' --width ' + yuv_width + ' --height ' + yuv_height + ' --fps_num ' + yuv_fps + ' --fps_den 1 ' + ' --i_period ' + yuv_fps + ' --rc_type 0 ' + ' --input_bit_depth 8 ' + ' --qp ' + set_qp + ' --wpp_threads 40 ' + ' --frm_threads 40 ' + ' --input ' + yuv_video + ' --output ' + coding_video + ' --verbose 2 ' 
os.system(cmd)
end_time = time.time()
print('END' + str(end_time - begin_time) + 's')

使用python3 a.py得到输出：

xj@coolc:~/yangxijie/playground/j$ python3 a.py
Version: 1.2.208_release,  SHA-1: cd295084706a307f887dea18b53d4716795974d4
-----------------------------------------------------------------------------------------------------------------------------------
< Sequence's Info >
	resolution input         : 1280 x 720
	resolution coding        : 1280 x 720
	bitdepth input           : 8
	bitdepth coding          : 8
	frame rate               : 60 / 1
	intra picture period     : 60
	close_gop                : 0
	max b frames             : 15
	signature                : 0

< LookAhead Info >
	lookahead                : 40
	scenecut                 : 0
	schistogram              : 0
	adaptive_gop             : 0

< Parallel Info >
	WPP threads              : 6
	frame threads            : 40

< RC Info >
	RC type                  : 0 (0: CQP, 1: CRF, 2: ABR, 3: CBR)
	qp                       : 45
	qp_offset_cb             : 0
	qp_offset_cr             : 0

< CU split CFG >
	ctu_size:        128
	min_cu_size:     4
	max_part_ratio:  8
	max_split_times: 6
	min_qt_size:     8
	max_bt_size:     64
	max_eqt_size:    32
	max_dt_size:     16

< Tool CFG >
	Loop Filter:  deblock: 1, sao: 1, alf: 1, cross_patch: 1,
	Inter: AMVR(1) HMVP_NUM(8) AFFINE(1) SMVD(1) UMVE(1) EMVR(1)
	Intra: TSCPM(1) IPF(1) DT(1)
	Transform: PBT(1) SECTrans(1)
	Quant: WeightedQuant: 0
	ENC-Side Tools: chroma_qp(1) AQ(0)
	Speed_level: 3
-----------------------------------------------------------------------------------------------------------------------------------
  Input YUV file           : /mnt/video/E/FourPeople_1280x720_60.yuv
  Output bitstream         : ./uavs3e.avs3
-----------------------------------------------------------------------------------------------------------------------------------
    POC | QP |  PSNR-Y  PSNR-U  PSNR-V| SSIM-Y SSIM-U SSIM-V|   Bits |  Time |        Ref. List      | Ext_info
************************************************************
    0(I)|41.0| 37.1648 42.2469 43.7415| 0.9491 0.9618 0.9743|  149888|   5838|L0         |L1         |[]
************************************************************
   16(B)|46.0| 36.3726 42.1169 43.4899| 0.9432 0.9609 0.9732|   13904|   1473|L0   0     |L1   0     |[]
***************************************************************************************
（省略）

===============================================================================
  PSNR Y(dB)       : 35.8344
  PSNR U(dB)       : 41.9294
  PSNR V(dB)       : 43.3710
  SSIM Y(dB)       : 0.9391
  SSIM U(dB)       : 0.9603
  SSIM V(dB)       : 0.9724
  Total bits(bits) : 2870696
  bitrate(kbps)    : 287.0696
===============================================================================
Encoded frame count               = 600
Total encoding time               = 450612.000 msec, 450.612 sec
Average encoding time for a frame = 751.020 msec
Average encoding speed            = 1.33152 frames/sec
===============================================================================
END80.22815370559692s

可以看到输出log的后面Total encoding time为450s，但是用python脚本提供的时间计算发现实际编码时间为80.2s。这也导致fps计算错误。（也可能是我对log中Total的理解有差。