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I have a small HP server (ProLiant MicroServer Gen8) and I use it to make surveillance camera recordings. The on-board graphics were quite weak, so I added a GeForce GT730 and installed the latest nVidia drivers for it. I did not change any settings in iSpy, but the resulting video files are now roughly 10x in size.
The quality looks the same, the frame rate and the resolution is also the same. What can be the reason of this? I included the file info I obtained using MPC-HC (old, new), I also copy the differing fields here:
old file new file
File size : 19.6 MiB 185 MiB
Duration : 15 min 1 s 14 min 44 s
Overall bit rate : 183 kb/s 1 758 kb/s
Writing application : Lavf57.56.100 Lavf57.83.100
Format settings, GOP : (no data) N=1
Duration : 15 min 1 s 14 min 44 s
Bit rate : 182 kb/s 1 757 kb/s
Frame rate : 4.358 FPS 4.565 FPS
Bits/(Pixel*Frame) : 0.136 1.253
Stream size : 19.5 MiB (100%) 185 MiB (100%)
Writing library : x264 core 148 r2721 72d53ab x264 core 152 r2851 ba24899
Encoding settings :
old: cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=3 / 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=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=16 / qpmax=26 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
new: cabac=1 / ref=1 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=2 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / 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=1 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Lock your bitrate at a max of 200 kb/s – Narzard – 2017-12-26T20:26:40.307
Consider checking the latest version of the iSpy software too and looking at the release notes of newer versions and such. You did change hardware so perhaps there's a bug with that hardware and those drivers and the version of iSpy you are running whereas perhaps the release notes will tell if any applicable bugs have since been patched. Never hurts to upgrade if you can after your typical backups and such. I still like the GPU offload explanation answered earlier as well too. – Pimp Juice IT – 2017-12-27T04:55:30.863