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  1. I'm trying to see if there is a way to determine if a movie file was ripped from a DVD/Blu-ray. Currently the only way I can check is looking at the ffprobe output and checking the tags property:

    "_STATISTICS_WRITING_APP-eng: MakeMKV v1.14.5 win(x64-release)"

    This tells me it was created by the MakeMKV application. If I have the video properties is there a way to check that it's a straight copy of a DVD/Blu-ray?

    Example:
    1. Bitrate: (7,209 kb/s)
    2. Resolution: (480p)
    3. Bit Depth: (8)
    4. Frame Rate: (23.976)
    5. Color Space: (YUV)
    6. Chroma Sampling: (4:2:0)
    7. File Size: (4.35GiB)
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  2. Where's the video and audio codecs? In your example, it has to be MPEG-2 if from a DVD. Except for the 23.976fps (all NTSC DVDs output 29.97fps), the rest are consistent with it being a DVD rip. How about a MediaInfo text printout?
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  3. I have a thought. Using the data I have above could I calculate the bitrate without using file size and see if that value is close to the value provided by mediainfo? I have a bunch of files(movies/shows) and I want a quick way to determine if they've been re-encoded after ripping.

    I extracted the video stream out of the movie just for an example.

    Code:
    General
    Unique ID                                : 182955288906884022244003373112494559093 (0x89A3E82D2724797CEC2DE563A5168F75)
    Complete name                            : C:\Users\xadea\Desktop\out.mkv
    Format                                   : Matroska
    Format version                           : Version 4
    File size                                : 4.36 GiB
    Duration                                 : 1 h 26 min
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 7 211 kb/s
    Writing application                      : Lavf58.33.100
    Writing library                          : Lavf58.33.100
    ErrorDetectionType                       : Per level 1
    
    Video
    ID                                       : 1
    ID in the original source medium         : 224 (0xE0)
    Format                                   : MPEG Video
    Format version                           : Version 2
    Format profile                           : Main@Main
    Format settings                          : CustomMatrix / BVOP
    Format settings, BVOP                    : Yes
    Format settings, Matrix                  : Custom
    Format settings, GOP                     : Variable
    Codec ID                                 : V_MPEG2
    Codec ID/Info                            : MPEG 1 or 2 Video
    Duration                                 : 1 h 26 min
    Bit rate mode                            : Variable
    Bit rate                                 : 7 209 kb/s
    Maximum bit rate                         : 9 800 kb/s
    Width                                    : 720 pixels
    Height                                   : 480 pixels
    Display aspect ratio                     : 16:9
    Frame rate mode                          : Variable
    Frame rate                               : 23.976 FPS
    Color space                              : YUV
    Chroma subsampling                       : 4:2:0
    Bit depth                                : 8 bits
    Scan type                                : Progressive
    Scan order                               : 2:3 Pulldown
    Compression mode                         : Lossy
    Bits/(Pixel*Frame)                       : 0.870
    Time code of first frame                 : 00:59:59;00
    Time code source                         : Group of pictures header
    Stream size                              : 4.35 GiB (100%)
    Language                                 : English
    Default                                  : Yes
    Forced                                   : No
    Color range                              : Limited
    Original source medium                   : DVD-Video
    
    Menu
    00:00:00.000                             : :Chapter 01
    00:05:05.838                             : :Chapter 02
    00:09:24.063                             : :Chapter 03
    00:13:18.831                             : :Chapter 04
    00:18:03.782                             : :Chapter 05
    00:22:14.533                             : :Chapter 06
    00:28:51.930                             : :Chapter 07
    00:32:54.839                             : :Chapter 08
    00:36:55.913                             : :Chapter 09
    00:42:27.411                             : :Chapter 10
    00:44:46.884                             : :Chapter 11
    00:50:21.218                             : :Chapter 12
    00:54:45.482                             : :Chapter 13
    00:59:34.103                             : :Chapter 14
    01:02:36.619                             : :Chapter 15
    01:07:12.361                             : :Chapter 16
    01:13:06.915                             : :Chapter 17
    01:16:04.593                             : :Chapter 18
    01:18:48.056                             : :Chapter 19
    01:19:58.827                             : :Chapter 20
    Last edited by cr3ative; 2nd Mar 2020 at 17:43.
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  4. No, imo.
    You could do a straight disc rip, or take the output of a disc mastering program like scenarist and they'd be identical.
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  5. In your example, I believe it's straight from the DVD with no reencoding, if that's what you wanted to know. Progressive 23.976fps with 2:3 pulldown to output 29.97fps.

    MediaInfo is better than whatever it was you showed at the beginning.
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    why? are you dmca enforcer? help? hell no.
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