When you can DL please have a look at the clip I linked
Unfortunately I can’t do much downloading. If you can tell me a movie (and give me a rough timestamp) where you see it I can check; assuming that I have that movie.
The blocking is one of the issues but not the only one. The closest comparison I would make is that everything looks like it has been badly transcoded to a low bitrate , resulting in lots of obvious banding and posterisation in gradients, a smeary look to film grain as a result DNR and just a general loss of any high frequency detail.
My assumption is that there is some sort of processing filter being applied only to VC-1 when being decoded by hardware, as it doesn’t affect any other codec from what I can tell.
Couple of quick examples if you have them (all blu-ray rips so untouched video)
Blood Diamond - 20 secs in there are some light shafts that make up one of the logos. Lots of posterisation and banding can be seen.
Body of lies - 00:12:42 - Close up on the face you can see lots of smearing and loss of detail. Tell tale “waxy” look from DNR
Sherlock Holmes (2009) This one is really bad, all the film grain is mushy, banding in colours etc…
Pretty much any shot from the Planet Earth blu-ray ( the first series) looks terrible.
To me it is obvious with all VC-1 files, not just specific clips. Comparing playback with something else ( or disable hardware decoding) should show the difference immediately.
Unfortunately, I don’t happen to have any of those movies/TV Shows. Figures…
To make it easier to find a movie that we both have, here’s a list of my VC-1 Movies. Hopefully you have one of them.
"9" "A Christmas Story" "A Nightmare on Elm Street" "American Pie 2" "An American Werewolf in London" "Animal House" "Austin Powers in Goldmember" "Austin Powers: International Man of Mystery" "Austin Powers: The Spy Who Shagged Me" "Battlestar Galactica" "Beetlejuice" "Doctor Zhivago" "Elf" "Fame" "Fast Times at Ridgemont High" "Fletch" "Flightplan" "Forbidden Planet" "Gone with the Wind" "Gremlins" "Grumpier Old Men" "Grumpy Old Men" "Harry Potter and the Chamber of Secrets" "Harry Potter and the Goblet of Fire" "Harry Potter and the Half-Blood Prince" "Harry Potter and the Order of the Phoenix" "Harry Potter and the Philosopher's Stone" "Harry Potter and the Prisoner of Azkaban" "Inception" "Love Actually" "Mamma Mia!" "National Lampoon's European Vacation" "Outbreak" "Purple Rain" "Se7en" "Sixteen Candles" "Taking Lives" "The Mask" "The Polar Express" "The Shining" "The Switch" "Twister" "Weird Science"
I have a number of those as well, however I had completley forgotten that you can take screenshots in Kodi, so its easy to make a comparison showing the issue.
I have uploaded a couple of quick comparison screenshots here that show the issue with the foced DNR on the Vero 4K when compared to the same MKV VC1 file played back in VLC (on my PC). You can clearly see that high frequncy detail is being lost on the Vero.
Caps taken from the same sample file mentioned before (clip of the file Constantine) along wiht a couple from the film Se7en.
General Unique ID : 247069771915629624081559552862298751544 (0xB9DFE83ED15B58A78D09B7B24002C238) Complete name : Z:\Codec Samples\VC1\VC-1_23.976_sample.mkv Format : Matroska Format version : Version 4 File size : 105 MiB Duration : 59 s 978 ms Overall bit rate mode : Variable Overall bit rate : 14.7 Mb/s Encoded date : UTC 2015-05-28 12:23:49 Writing application : mkvmerge v7.9.0 ('Birds') 64bit Writing library : libebml v1.3.1 + libmatroska v1.4.2 Video ID : 1 Format : VC-1 Format profile : Advanced@L3 Codec ID : V_MS/VFW/FOURCC / WVC1 Codec ID/Hint : Microsoft Duration : 59 s 977 ms Bit rate : 13.4 Mb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Compression mode : Lossy Bits/(Pixel*Frame) : 0.269 Stream size : 95.5 MiB (91%) Language : English Default : Yes Forced : No Audio ID : 2 Format : MLP FBA Format/Info : Meridian Lossless Packing FBA Commercial name : Dolby TrueHD Codec ID : A_TRUEHD Duration : 59 s 977 ms Bit rate mode : Variable Bit rate : 1 356 kb/s Maximum bit rate : 3 267 kb/s Channel(s) : 6 channels Channel layout : L R C LFE Ls Rs Sampling rate : 48.0 kHz Frame rate : 1 200.000 FPS (40 SPF) Bit depth : 24 bits Compression mode : Lossless Delay relative to video : 1 ms Stream size : 9.70 MiB (9%) Title : 5.1 Language : English Default : Yes Forced : No Menu 00:00:00.000 : en:Chapter 19 00:00:07.007 : en:Chapter 20
Thanx a lot for the screenshots but only the VLC seem to show.
Edit: Works on Chrome
We have some VC-1 improvements coming in our next kernel. I suspect that this will resolve things and we have had @bmillham do some extensive testing.
Sounds interesting! Do we have any idea at all when that might be available? Weeks? Months?
When it’s ready
Just a note, for housekeeping purposes, that the VC-1 decoding errors I was complaining about in posts 1 and 6 of this thread have been fixed in the September 2022 software release.
VC-1 playback on RPi 4B is not fixed in the September release (but that wasn’t to be expected as the RPi 4 does not have any VC-1 hardware acceleration).
Well, yes. But this is a thread about VC-1 playback on the Vero 4K(+).