Avisynth x265 Source Filters?

[VideoFanatic]

Are there any source filters that support x265?

[hydra3333]

if you have an nvidia card ...
http://rationalqm.us/dgdecnv/dgdecnv.html

[VideoFanatic]

...

[VideoFanatic]

When I try to save a project file of a x265 MKV in DGDecodeNV I get this message: GPU Decoder: HEVC not supported on this device.

[hydra3333]

is your gpu new enough ? https://en.wikipedia.org/wiki/Nvidia_PureVideo#Feature_Set_F

[VideoFanatic]

I've got a GT 520. The table says it supports 4K UHD video decoding which uses HEVC so I assume it support HEVC decoding.

[Marsia Mariner]

IF decoding speed is not a concern, then why not use FFVideoSource() or LAV Filters + DirectShowSource()

P.S.: x265 is not the same as H.265 or HEVC.

[jagabo]

I've got a GT 520. The table says it supports 4K UHD video decoding which uses HEVC so I assume it support HEVC decoding.

No, it says it supports 4K UHD h.264 (AVC) decoding, not h.265 (HEVC) decoding. 4K UHD indicates to frame size, not codec.

[KarMa]

Are there any source filters that support x265?

FFMSIndex and L-Smash Works can decode HEVC but it's CPU software driven. If my memory is correct I believe FFMSindex is much faster at decoding than the other.

[sneaker]

That would be surprising as both are based on ffmpeg.

[KarMa]

That would be surprising as both are based on ffmpeg.

I just remember a few years back one of them being quite a bit faster with decoding 4k x265 content. Maybe there was some multi-threading happening on one over the other or something else. Has not been tested recently.

[LigH.de]

I would recommend L-SMASH Works or FFMS2 as well; but to have an alternative in case of problems:

LAV Filters + DirectShowSource()

There is also DSS2mod from the Xvid4PSP project archive (or ge.tt mirror) which is able to use a copy of LAV Filters directly, without the often unreliable building of a whole DirectShow filter chain (unreliable in the meaning that it may contain surprising and unwanted filters which may ruin the quality, depending on which filters ever got installed in your system before).

The here attached small archive contains

• avss (DSS2) modded by fcp, version 2.0.0.13 without the outdated LAV Filters 0.63 – use either avss.dll for AviSynth 2.5 or avss_26.dll for AviSynth 2.6 / plus 32b
• avss_x64 from the Wayback Machine of the Internet (via AviSynth Wiki: x64 plugins)

See the README, chapter 10, about additional files: Put a matching VSFilter.dll next to the avss*.dll you are going to use (may or may not be your AviSynth plugins directory anyway), and a subdirectory "LAVFilters" containing *.ax files of a supported version. I did not check if most current LAV Filters are still compatible. If you want to link to existing directories of system installed LAV Filters and VSFilter.dll instead of copying files to your AviSynth plugins, use the "lavf_path" and "dvs_path" parameters.

[raffriff42]

Test/demo of decoding HEVC, 10bit, YUV 4:2:0 (some trial and error was needed).
AviSynth+ required.

LWLibavVideoSource(<path>, stacked=true, format="YUV420P10")
ConvertFromStacked(bits=10)
ConvertBits(8, dither=0) ## '0' means on, '-1' means off

[KarMa]

LAV Filters + DirectShowSource()

It's possible to use LAV Filters in avisynth video deocding? As that should off load decoding to the GPU. I tried googling that awhile back with other people saying it won't work.

[poisondeathray]

LAV Filters + DirectShowSource()

Is possible to use LAV Filters in avisynth video deocding? As that should off load decoding to the GPU. I tried googling that awhile back with other people saying it won't work.

Yes you can

(But not GPU offloading for the OP in this specific case with HEVC and a GT520)

[Marsia Mariner]

@KarMa:

just make sure LAV Video is configured to use hardware-decoding while Avisynth uses the .GRF file.
Assuming there exists an HEVC decoder in the GPU, of course.