[gd350turbo]

Originariamente inviato da Khanattila

Handbrake di fatto è soltanto una interfaccia grafica a HandBrakeCLI che al suo interno usa x264 e x265. Quest'ultimi con un minimo di pratica si posso usare da soli ottenendo risultati qualitativamente superiori in minor tempo.

x265 in particolare è in fase alpha, e il team di sviluppo rilascia continuamente nuove versioni https://chromashift.org/x265_builds/

La ilc14 è consigliata per processori intel, msvc2012 per gli altri.

Ottima notizia !

Anche se non è proprio user friendly:

x265 [info]: HEVC encoder version 1.3+374-4495af3b30bb
x265 [info]: build info [Windows][ICC 1400][64 bit] 16bpp

Syntax: x265 [options] infile [-o] outfile
infile can be YUV or Y4M
outfile is raw HEVC bitstream

Executable Options:
-h/--help Show this help text and exit
-V/--version Show version info and exit

Output Options:
-o/--output <filename> Bitstream output file name
--log-level <string> Logging level: none error warning info debug full. Default info
--no-progress Disable CLI progress reports
--[no-]cu-stats Enable logging stats about distribution of cu across all modes. Default disabled
--csv <filename> Comma separated log file, log level >= 3 framelog, else one line per run

Input Options:
--input <filename> Raw YUV or Y4M input file name. `-` for stdin
--y4m Force parsing of input stream as YUV4MPEG2 regardless of file extension
--fps <float|rational> Source frame rate (float or num/denom), auto-detected if Y4M
--input-res WxH Source picture size [w x h], auto-detected if Y4M
--input-depth <integer> Bit-depth of input file. Default 8
--input-csp <string> Source color space: i420, i444 or i422, auto-detected if Y4M. Default: i420
-f/--frames <integer> Maximum number of frames to encode. Default all

--seek <integer> First frame to encode
--[no-]interlace <bff|tff> Indicate input pictures are interlace fields in temporal order. Default progressive
--dither Enable dither if downscaling to 8 bit pixels. Default disabled

Quality reporting metrics:
--[no-]ssim Enable reporting SSIM metric scores. Default disabled
--[no-]psnr Enable reporting PSNR metric scores. Default disabled

Profile, Level, Tier:
--profile <string> Enforce an encode profile: main, main10, mainstillpicture
--level-idc <integer|float> Force a minumum required decoder level (as '5.0' or '50')
--[no-]high-tier If a decoder level is specified, this modifier selects High tier of that level

Threading, performance:
--threads <integer> Number of threads for thread pool (0: detect CPU core count, default)
-F/--frame-threads <integer> Number of concurrently encoded frames. 0: auto-determined by core count
--[no-]wpp Enable Wavefront Parallel Processing. Default enabled
--[no-]pmode Parallel mode analysis. Default disabled
--[no-]pme Parallel motion estimation. Default disabled
--[no-]asm <bool|int|string> Override CPU detection. Default: auto

Presets:
-p/--preset <string> Trade off performance for compression efficiency. Default medium
ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, or placebo
-t/--tune <string> Tune the settings for a particular type of source or situation:
psnr, ssim, zerolatency, or fastdecode

Quad-Tree size and depth:
-s/--ctu <64|32|16> Maximum CU size (default: 64x64). Default 64
--tu-intra-depth <integer> Max TU recursive depth for intra CUs. Default 1

--tu-inter-depth <integer> Max TU recursive depth for inter CUs. Default 1

--[no-]rect Enable rectangular motion partitions Nx2N and 2 NxN. Default disabled
--[no-]amp Enable asymmetric motion partitions, requires --rect. Default disabled

Analysis:
--rd <0..6> Level of RD in mode decision 0:least....6:full RDO. Default 3
--psy-rd <0..2.0> Strength of psycho-visual rate distortion optimization, 0 to disable. Default 0.000000
--psy-rdoq <0..10.0> Strength of psycho-visual optimization in quantization, 0 to disable. Default 0.000000
--nr <integer> An integer value in range of 100 to 1000, which denotes strength of noise reduction. Default disabled
--[no-]tskip-fast Enable fast intra transform skipping. Default disabled
--[no-]early-skip Enable early SKIP detection. Default disabled
--[no-]fast-cbf Enable early outs based on whether residual is coded. Default disabled

Coding tools:
-w/--[no-]weightp Enable weighted prediction in P slices. Default enabled
--[no-]weightb Enable weighted prediction in B slices. Default disabled
--[no-]cu-lossless Consider lossless mode in CU RDO decisions. Default disabled
--[no-]signhide Hide sign bit of one coeff per TU (rdo). Default enabled
--[no-]tskip Enable intra 4x4 transform skipping. Default disabled

Temporal / motion search options:
--me <string> Motion search method dia hex umh star full. Default 1
-m/--subme <integer> Amount of subpel refinement to perform (0:least .. 7:most). Default 2
--merange <integer> Motion search range. Default 57
--max-merge <1..5> Maximum number of merge candidates. Default 2

Spatial / intra options:
--[no-]strong-intra-smoothing Enable strong intra smoothing for 32x32 blocks.
Default enabled
--[no-]constrained-intra Constrained intra prediction (use only intra coded reference pixels) Default disabled
--[no-]b-intra Enable intra in B frames in veryslow presets. Default enabled
--[no-]fast-intra Enable faster search method for angular intra predictions. Default disabled
--rdpenalty <0..2> penalty for 32x32 intra TU in non-I slices. 0:disabled 1:RD-penalty 2:maximum. Default 0

Slice decision options:
--[no-]open-gop Enable open-GOP, allows I slices to be non-IDR. Default enabled
-I/--keyint <integer> Max IDR period in frames. -1 for infinite-gop.Default 250
-i/--min-keyint <integer> Scenecuts closer together than this are coded as I, not IDR. Default: auto
--no-scenecut Disable adaptive I-frame decision
--scenecut <integer> How aggressively to insert extra I-frames. Default 40
--rc-lookahead <integer> Number of frames for frame-type lookahead (determines encoder latency) Default 20
--bframes <integer> Maximum number of consecutive b-frames (now it only enables B GOP structure) Default 4
--bframe-bias <integer> Bias towards B frame decisions. Default 0
--b-adapt <0..2> 0 - none, 1 - fast, 2 - full (trellis) adaptive B frame scheduling. Default 2
--[no-]b-pyramid Use B-frames as references. Default enabled
--ref <integer> max number of L0 references to be allowed (1 .. 16) Default 3
--qpfile <string> Force frametypes and QPs for some or all frames

Format of each line: framenumber frametype QP
QP is optional (none lets x265 choose). Frametypes: I,i,P,B,b.
QPs are restricted by qpmin/qpmax.

Rate control, Quantization:
--bitrate <integer> Target bitrate (kbps) for ABR (implied). Default 0
-q/--qp <integer> QP for P slices in CQP mode (implied).
--ipratio and --pbration determine other slice QPs
--crf <float> Quality-based VBR (0-51). Default 28.000000
--[no-]lossless Enable lossless: bypass transform, quant and loop filters globally. Default disabled
--crf-max <float> With CRF+VBV, limit RF to this value. Default 0.000000
May cause VBV underflows!
--crf-min <float> With CRF+VBV, limit RF to this value. Default 0.000000
this specifies a minimum rate factor value for encode!
--vbv-maxrate <integer> Max local bitrate (kbit/s). Default 0
--vbv-bufsize <integer> Set size of the VBV buffer (kbit). Default 0
--vbv-init <float> Initial VBV buffer occupancy (fraction of bufsize or in kbits). Default 0.900000
--aq-mode <integer> Mode for Adaptive Quantization - 0:none 1:uniform AQ 2:auto variance. Default 2
--aq-strength <float> Reduces blocking and blurring in flat and textured areas.(0 to 3.0). Default 1.000000
--[no-]cutree Enable cutree for Adaptive Quantization. Default enabled
--ipratio <float> QP factor between I and P. Default 1.400000
--pbratio <float> QP factor between P and B. Default 1.300000
--cbqpoffs <integer> Chroma Cb QP Offset. Default 0
--crqpoffs <integer> Chroma Cr QP Offset. Default 0
--stats Filename for stats file in multipass pass rate control. Default x265_2pass.log
--pass Multi pass rate control.
- 1 : First pass, creates stats file
- 2 : Last pass, does not overwrite stats file
- 3 : Nth pass, overwrites stats file
--[no-]slow-firstpass Enable a slow first pass in a multipass rate control mode. Default disabled
--analysis-mode <string|int> save - Dump analysis info into file, load - Load analysis buffers from the file. Default 0
--analysis-file <filename> Specify file name used for either dumping or reading analysis data.
--scaling-list <string> Specify a file containing HM style quant scaling lists or 'default' or 'off'. Default: off
--lambda-file <string> Specify a file containing replacement values for the lambda tables
MAX_MAX_QP+1 floats for lambda table, then again for lambda2 table
Blank lines and lines starting with hash(#) are ignored
Comma is considered to be white-space

Loop filters (deblock and SAO):
--[no-]lft Enable Deblocking Loop Filter. Default enabled
--[no-]sao Enable Sample Adaptive Offset. Default enabled
--[no-]sao-non-deblock Use non-deblocked pixels, else right/bottom boundary areas skipped. Default disabled

VUI options:
--sar <width:height|int> Sample Aspect Ratio, the ratio of width to height of an individual pixel.
Choose from 0=undef, 1=1:1("square"), 2=12:11,3=10:11, 4=16:11,
5=40:33, 6=24:11, 7=20:11, 8=32:11, 9=80:33, 10=18:11, 11=15:11,
12=64:33, 13=160:99, 14=4:3, 15=3:2, 16=2:1 or custom ratio of <int:int>. Default 0
--crop-rect <string> Add 'left,top,right,bottom' to the bitstream-level cropping rectangle
--overscan <string> Specify whether it is appropriate for decoder to show cropped region: undef, show or crop. Default undef
--videoformat <string> Specify video format from undef, component, pal, ntsc, secam, mac. Default undef
--range <string> Specify black level and range of luma and chroma signals as full or limited Default limited
--colorprim <string> Specify color primaries from undef, bt709, bt470m, bt470bg, smpte170m,
smpte240m, film, bt2020. Default undef
--transfer <string> Specify transfer characteristics from undef, bt709, bt470m, bt470bg, smpte170m,
smpte240m, linear, log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
bt2020-10, bt2020-12. Default undef
--colormatrix <string> Specify color matrix setting from undef, bt709, fcc, bt470bg, smpte170m,
smpte240m, GBR, YCgCo, bt2020nc, bt2020c. Default undef
--chromaloc <integer> Specify chroma sample location (0 to 5). Default of 0

Bitstream options:
--[no-]info Emit SEI identifying encoder and parameters. Default enabled
--[no-]aud Emit access unit delimiters at the start of each access unit. Default disabled
--[no-]hrd Enable HRD parameters signalling. Default disabled
--[no-]repeat-headers Emit SPS and PPS headers at each keyframe. Default disabled
--hash <integer> Decoded Picture Hash SEI 0: disabled, 1: MD5, 2: CRC, 3: Checksum. Default 0

Reconstructed video options (debugging):
-r/--recon <filename> Reconstructed raw image YUV or Y4M output filename
--recon-depth <integer> Bit-depth of reconstructed raw image file. Defaults to input bit depth, or 8 if Y4M

Non c'è modo di integrarlo nella user interface di handbrake o altro ?