U f@sjddlZddlZddlZddlZddlmZmZddl Z Gddde Z Gddde Z GdddZ dS) N) VideoReadercpuc@seZdZddZddZdS) NormalizecCs4t|dddd|_t|dddd|_dS)N)th FloatTensorviewmeanstd)selfr r r /root/demo/VideoLoader.py__init__ szNormalize.__init__cCs||j|jd}|S)Ng:0yE>r r r tensorr r r__call__szNormalize.__call__N__name__ __module__ __qualname__rrr r r rr src@seZdZddZddZdS) PreprocessingcCstdddgdddgd|_dS)Ng3<4'?gwg M?gy{ ?gB91?gwt.?g U?r)rnorm)r r r rrszPreprocessing.__init__cCs|d}||}|S)Ngo@)rrr r rrs zPreprocessing.__call__Nrr r r rrsrc@s:eZdZdZdddZddZd d Zd d Zd dZdS) VideoLoaderzPytorch video loader.rTcCs*||_||_||_t|_d|_d|_dS)N i) centercropsize framerater preprocess max_feats features_dim)r rrrr r rr#s zVideoLoader.__init__cCs\t|jtr t|jdkr |jS||kr@t||j||jfS|jt||j|fSdS)N) isinstancertuplelenint)r hwr r r_get_output_dim6s zVideoLoader._get_output_dimc Csft|}tdd|dDd}t|d}t|d}|dd\}}t|t|}|||fS)Ncss|]}|ddkr|VqdS) codec_typevideoNr ).0streamr r r As z-VideoLoader._get_video_dim..streamswidthheightZavg_frame_rate/)ffmpegprobenextr'split) r video_pathr5 video_streamr1r2numZdenum frame_rater r r_get_video_dim>s   zVideoLoader._get_video_dimc Cstj|rtd|z||\}}}Wn*td|td|dYSX|dkrtd|td|dS|||\}}zt |j d|j d d||}|j rt||jd }t||jd } ||| |j|j}|jd d d d jddd\} } Wn*td|td|dYSX|j rbt|jtrb|j|j}}t| tjd||dg} t| d} | dddd} n td} | |dS)NzDecoding video: {}zffprobe failed at: {}r)r,inputzCorrupted Frame Rate: {}fps)r>scaleg@zpipe:rawvideorgb24)formatpix_fmtT)Zcapture_stdoutquietzffmpeg error at: {}rfloat32rr#)ospathisfileprintrBr<rzerosr*r4r=filterrrr'rcropoutputrunr$np frombufferuint8reshape from_numpyastypepermute) r r8r(r)frr2r1cmdxyout_r,r r r _getvideoKsZ    zVideoLoader._getvideocCs||d}t||jkr^g}t|jD] }|||t||jq*t|}|j}n6t||jkrt|}t|t|j||j gd}| |}||fS)Nr,r) r]r&r!rangeappendrstackcatrKr"r )r r8r,Zsampledj video_lenr r rrs  zVideoLoader.__call__N)rrT) rrr__doc__rr*r<r]rr r r rr s  >r)Zcv2torchrrGnumpyrPZdecordrrr4objectrrrr r r rs