VideoHelp Forum




+ Reply to Thread
Results 1 to 8 of 8
  1. I have kept all of my raw lossless vhs capture avi's, around 2.0TB, who knows if I'll ever use them again, but in the future world of AI who knows.

    7zip has a 98% compression ratio, which really isn't worth the time. I haven't seemed to find any other options but thought I'd ask as I havent found any recent threads on the subject.
    Quote Quote  
  2. Capturing Memories dellsam34's Avatar
    Join Date
    Jan 2016
    Location
    Member Since 2005, Re-joined in 2016
    Search PM
    Are they uncompressed AVI or losslessly compressed, Because lossless compression can save you up to 40%, albeit it's a tedious work. Though a 2TB is around $60, so I would just put them in a hard drive and forget about them.
    Quote Quote  
  3. Member
    Join Date
    Aug 2018
    Location
    Wrocław
    Search PM
    Originally Posted by jeby1980 View Post
    I have kept all of my raw lossless vhs capture avi's, around 2.0TB, who knows if I'll ever use them again, but in the future world of AI who knows.

    7zip has a 98% compression ratio, which really isn't worth the time. I haven't seemed to find any other options but thought I'd ask as I havent found any recent threads on the subject.
    Lossless won't be smaller.
    You can compress to H264/H265 with low CRF, but it will be (slightly, imperceptibly) lossy compression.
    Quote Quote  
  4. FFV1 should deliver higher lossless compression than 7z - it is tailored for video and 7z i general purpose.
    I also agree that lossy (but imperceptible) compression with modern video codec can be acceptable (depends on your criteria).
    Give a chance to FFV1 - if not try lossless H.264/265 but also test minimal lossy way (like qp=4).
    Quote Quote  
  5. Captures & Restoration lollo's Avatar
    Join Date
    Jul 2018
    Location
    Italy
    Search Comp PM
    As dellsam34 says, keep your raw lossless capture as they are. They are your masters for present and future enhacement, if any.

    More advanced techniques can be used for extremely important material (error detection and correction, storage of 3x copies in 3 different places, etc) but that’s too much for you I suppose.
    Quote Quote  
  6. Thank you for the replies. They're the AVI's created during capture with lagarith. Yes, I just didn't know if there was anything that reduced them even further like zip or 7z. Just wanted to make sure that there wasn't something obvious before I spend the money on hard drives for only something that I "might" use in the future (HDD prices havent come down in price for quite some time now).
    Quote Quote  
  7. Lagarith (and all the other lossless video codecs) use algorithms very similar to the archivers like 7zip, WinRar, etc. So those programs won't get you much more compression unless there's some other uncompressed data within the video file (uncompressed audio, subtitles, padding, etc.).
    Quote Quote  
  8. Some discussion on using x264/x265 with crf 0 (lossless) for compressing these raw captures. Considering doing some testing on my own, as I have about 60TB of UTVideo and Huffyuv captures for long term archival.

    Seems in testing this person was able to compress and uncompress and get an exact result back, while also cutting the size down drastically.

    https://www.reddit.com/r/DataHoarder/comments/1g0g1pf/should_i_winrar_archive_raw_vhs_records_or/
    Quote Quote  



Similar Threads

Visit our sponsor! Try DVDFab and backup Blu-rays!