1 Topic by kadigan.ksb (edited by kadigan.ksb 13-07-2023 01:42:21)

  • Thanks: 4

Topic: Mixed aspect ratio video sometimes gets stuck on wrong AR

I'm watching "For All Mankind" which is set in the '70s and '80s. The episodes sometimes include 4:3 aspect ratio sequences. SVP4 seems to have issues with that, it has trouble switching between 16:9 (well, 2:1 in this case, since the video is 1920x960) and 4:3 when they're in the same file.

I don't even know how it's possible to set this inside a file - but apparently it is (segments? I'm looking at an MKV).

Attaching several images. "AR 4x3 incorrect" shows a scene that got "stuck" in the wrong AR; "AR proper for segment" shows the same scene with SVP disabled. "AR 4x3 previous segment" shows the scene immediately prior to this.

Also, whenever this change happens - SVP just goes bonkers for a good moment (it's probably throwing its buffers away and re-doing the look-ahead). Still, those moments only last a few seconds, so it's annoying that this can't happen faster.

What further info can I provide? I can't give you a sample of the file (several hundred MB), but I can point you to a torrent of it ("For All Mankind", S02E10 at around 43:10).


SVP v4.6.0.246 / Windows 10

Post's attachments

AR 4x3 incorrect.jpg 52.56 kb, 37 downloads since 2023-07-12 

AR 4x3 previous segment.jpg 85.79 kb, 40 downloads since 2023-07-12 

AR proper for segment.jpg 75.81 kb, 40 downloads since 2023-07-12 

  • MAG79
  • SVP developer
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Re: Mixed aspect ratio video sometimes gets stuck on wrong AR

I can't give you a sample of the file (several hundred MB), but I can point you to a torrent of it ("For All Mankind", S02E10 at around 43:10)

What exaclty file name and size in bytes?
I will try to find the torrent.

  • Thanks: 4
  • Thanks for the post: 1

Re: Mixed aspect ratio video sometimes gets stuck on wrong AR

Here's the magnet to it.

magnet:?xt=urn:btih:243885183a052a47243e7d0fe9b6ed88d2bccde3&dn=For.All.Mankind.S02E10.1080p.HEVC.x265-MeGusta%5Beztv.re%5D.mkv%5Beztv%5D&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A80&tr=udp%3A%2F%2Fglotorrents.pw%3A6969%2Fannounce&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337%2Fannounce&tr=udp%3A%2F%2Fexodus.desync.com%3A6969

Otherwise:

Filename: For.All.Mankind.S02E10.1080p.HEVC.x265-MeGusta[eztv.re].mkv
Filesize: 727 MB (763,040,109 bytes)
Params as seen by MPC-HC:

Video: HVC1 1920x960 23.976fps [V: English [eng] (hevc main 10, yuv420p10le, 1920x960) [default]]
Audio: DD+ 48000Hz 6ch 768kbps [A: English [eng] (eac3, 48000 Hz, 5.1, 768 kb/s) [default]]
Subtitle: Advanced SubStation Alpha [S: English [Forced] [eng] (ass) [default,forced]]
Subtitle: UTF-8 [S: No subtitles]

  • MAG79
  • SVP developer
  • Offline

Re: Mixed aspect ratio video sometimes gets stuck on wrong AR

I've downloaded and looked your video.
It is usual video with constant frame resolution 1920x960.
Base video source have this resoution and only small part of scenes has 4:3 screen aspect ratio and black borders from left and right sides.
To avoide resolution changes best solution is to disable SVP option: Video frame > Detect and cut off black bars
Or you can open Advanced controls option of Video frame menu, press and hold button Black bars detection and select option: One time only

  • Thanks: 4

Re: Mixed aspect ratio video sometimes gets stuck on wrong AR

Ah, so I can disable this entirely.

That's fine, because I prefer to see the original video without alterations anyway (if it bothers me, I can always zoom in with the video player).

Thank you for this.