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12th June 2018, 11:59 | #22881 | Link |
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it's not that simple.
the only part that is simple is that the performance differences for madVR are mimimal if not zero on a proper working system. if you think d3d11 native is the fastest mode for madVR it has to copy the data to dx9 after getting them this is not the case with dxva2 or software decoding. if transferring big data or doing this copy process is using more processing power is hard to check because it is so little and inconsistent. in term of rendertiems d3d11 clearly looses on the madVR OSD what ever that is worth i never encountered any real world differences. i get 1.5 to 3 ms in the madVR OSD just for the d3d11 interop while for software decoding i can't find a reliable number or performance impact. |
18th June 2018, 14:19 | #22882 | Link |
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Artificial statistics data don't prove anything. With my GTX 1070, the decoder performance with DXVA2 was too slow for 8k VP9, while D3D11VA worked.
madVR uses an interop for D3D11 presentation as well, and it doesn't really cost performance. Less guessing, please. |
19th June 2018, 13:55 | #22885 | Link |
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LAV Filters 0.72
Code:
LAV Video - Changed: Enabled CineformHD decoding by default, since the decoder has much improved - Fixed: Decoding Matroska files with Linked Segments which used old x264 4:4:4 encodes could result in corruption LAV Audio - NEW: Blu-ray Dolby Digital Plus 7.1 decoding and bitstreaming support - NEW: LAV Audio will fallback to audio decoding if bitstreaming is not supported by the audio renderer/hardware - Fixed: DTS-HD HRA bitstreaming did not work properly with many A/V receivers - Fixed: TrueHD bitstreaming could result in drop-outs on high bitrate TrueHD+Atmos streams Audio and Bitstreaming Improvements A lot of work went into this release for bitstreaming improvements, including doing a lot of research and reverse engineering to figure out how the TrueHD bitstreaming is really supposed to work, so that high bitrate streams (as found on UltraHD Blu-rays with Atmos) no longer cause drop-outs during playback. Some newer receivers also had trouble receiving DTS-HD HRA streams, which should hopefully be resolved as well - even though my own receiver accepted the previous format just fine, but testing by other users has yielded quite positive results. And last but not least, LAV Audio finally supports handling Dolby Digital Plus 7.1 as found on Blu-ray discs properly, both in decoding and bitstreaming. This format has not seen very wide use on Blu-ray discs, but the usage seems to be increasing lately. Outside of those improvements, LAV 0.72 of course comes with a newer version of FFmpeg.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 19th June 2018 at 15:24. |
19th June 2018, 16:25 | #22890 | Link |
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Thanks for the new release and your work!
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20th June 2018, 19:34 | #22892 | Link |
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Hi, my AVR is 7.1 capable, however, I have a 5.1 setup. If I were to send PCM to my receiver instead of bitstream, for 7.1 tracks should I send the full 7.1 channels and let the AVR do the downmixing, or set LAV to output 5.1?
Also, not starting a PCM vs bitstreaming debate, but is there any advantage to bitstreaming? Don't the lossless codecs have downmixing metadata in them whereas PCM would not have this? |
20th June 2018, 22:06 | #22893 | Link |
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bitstreaming is less accurate in term of A/V sync.
lav or an audio render could use the meta data to down mix not sure if there is a render with support for that or if lavfilter is reading it. i can't tell you if PCM can be send with meta data. |
21st June 2018, 01:36 | #22896 | Link |
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It depends on the AVR but yea, I let mine do the same thing. Then again, I've got a massive speaker upgrade en route so I'll be fully 7.1 shortly. WOO HOO!
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21st June 2018, 08:58 | #22897 | Link |
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nevcairiel
Hi. Fallback to audio decoding is not working if some audio processor present in graph, "ffdshow Audio Processor" as example.
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21st June 2018, 09:06 | #22898 | Link |
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Thats probably ffdshows fault, its extremely inflexible in changing its types. Also, why would an audio processor ever accept a bitstreaming type in the first place?
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LAV Filters - open source ffmpeg based media splitter and decoders |
23rd June 2018, 04:33 | #22900 | Link | |
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Op post desc.
Hey Nevcairiel,
Just mentioning the top post desc still says 0.71, the link to the fille is ok though, it links to v 0.72 Quote:
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Tags |
decoders, directshow, filters, splitter |
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