will we cache the "ffmpeg.LoadAVContext" metadata to reduce the seek option's time cost?

[t00350320]

hi, we tested a mp4 seek with a remote url , here is the time cost

func (p *Processor) Process
##000test,Process,time 1693557521532
##001test,Process,time 1693557521534
av, err := ffmpeg.LoadAVContext(rs, size)
##002test,Process,LoadAVContext time 1693557524155
meta := av.Metadata()
##002test,Process,Metadata time 1693557524156
case "seek":
##003test,Process,seek time 1693557524440
##003test,Process,out time 1693557524453

so, we find the LoadAVContext cost =1693557524155 - 1693557521534 = 2621ms / total 2921ms will we cache the LoadAVContext data in process for next seek request? thank you very much!!!

[t00350320]

by the way, a seek request "http://localhost:8000/unsafe/filters:frame(1m)/http://$url/mps-test-south2-input/16-test.mp4" will download the full mp4 file? the package captured info here,

GET /mps-test-south2-input/16-test.mp4 HTTP/1.1
Host: xxx
User-Agent: imagor/1.4.7
Accept: */*
Accept-Encoding: gzip

HTTP/1.1 200 OK
Server: nginx
Date: Mon, 04 Sep 2023 06:38:42 GMT
Content-Type: application/octet-stream
Content-Length: 11734872
Connection: keep-alive
Accept-Ranges: bytes
Content-Transfer-Encoding: binary
ETag: "xxx"
Last-Modified: Wed, 07 Jun 2023 07:07:57 GMT
Vary: Origin,Access-Control-Request-Method,Access-Control-Request-Headers


... ftypisom....isomiso2avc1mp41....free....mdat..........E....H..,. .#..x264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=9 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00......e...o.....K.".\j.)7..z.x.zE......].0.......	[email protected].].<..j.P"....oI#[....|.|.a.3....
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