![]() ![]() Many encoder GUI's refer to it as a quality setting. ie it kind of guesses as it encodes.Ĭonstant Quantizer: Not exactly a true quality based encoding method but fairly close. Without a first pass the encoder has to keep making quality adjustments to hit the target average bitrate by the end of the encode. Quality should remain constant throughout but because you're specifying a bitrate you don't know what it'll be.Īverage bitrate: It's variable bitrate, so it's less wasteful than constant bitrate and for a given bitate it should provide better quality, or a more consistent quality thought an encode, but it only uses single pass encoding. The encoder works out how to distribute the bits during the first pass and encodes during the second. 2 pass encoding is often used while specifying a target (average) bitrate or a file size. Variable bitrate: The bitrate varies so theoretically the quality remains constant throughout the encode. Whether it's noticeable will depend on how high the constant bitrate is. More bits than necessary here, maybe not enough there etc. ![]() As each video will compress differently, the bitrate required for a given quality will change with each encode.Ĭonstant bitrate: The birate is constant so the quality will vary throughout the encode. When you specify the quality the unknown becomes the bitrate. When you specify a file size (or bitrate) you're effectively specifying the quality without knowing what it'll be. And given the goal is AVI I assume you're re-compressing video encoded with the x264 encoder while using an mpeg4 encoder (Xvid/Divx etc) which is older and less efficient. ![]() It just comes down to how hard the video is to re-compress. The bitrate of the source video has nothing to do with the bitrate required to re-compress it. To justify running that long it would have to give more than a marginal difference to the output.Writing application : HandBrake 0.9.6 2012022800Įncoding settings : 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=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=2pass / mbtree=1 / bitrate=1000 / ratetol=1.0 / qcomp=0.60 / qpmin=3 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00 I went back to my old fallback of using Xmedia Recode which upscaled in less than 1 hour (50+fps). OK it’s 59.94 fps and 46 minutes long but I was still shocked by the estimated 4+ DAYS to render (0.2fps) … so that’s not happening. I’ve seen a massive performance increase swapping my old GTX1080 for an RTX3070 as rendering times have dropped by around 60% but today I wanted a relatively small upscale of a VR video from 3400 1700 up to 40962048 (120%). While having multiple previews available now it’s not really easy to compare different ones unless they are side by side as in the previous version. ![]() Please remove looping the video playback, it’s much easier at a glance when doing other things if the video stops once it’s done and it also doesn’t use resources. Also I’d much prefer the constant quality variable bitrate to reappear as it’s much more efficient than setting one bitrate for all. I can’t say I’m a fan of the new V3 interface as a lot of the older options now seem to be missing for lower quality video. ![]()
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