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Unexpected Speed or FPS
#1
I am running into an issue where this Behind the Scenes clip I'm trying to re-encode/compress is not outputting the right speed/fps. It seems to play it back too fast. I think it could be related to the deinterlacing settings or mixed fps clips. Also, I notice that whenever I import the clip, it wants to give me a different FPS for output. Again, I don't know if this is related the the settings or a flagging issue. I have tried multiple different scenarios and none seem to work. I have attached a debug report.
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#2
Will Look at it after work. Clip seems to be soft telecine.
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Offline between (including) 29th of June and 5th of July => RochHarz Festival
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#3
MediaInfo reports:
Video Count : 392 Count of stream of this kind : 1 Kind of stream : Video Kind of stream : Video Stream identifier : 0 StreamOrder : 0 ID : 1 ID : 1 ID in the original source medium : 4113 ID in the original source medium : 4113 (0x1011) Unique ID : 1 Format : MPEG Video Format : MPEG Video Commercial name : MPEG-2 Video Format version : Version 2 Format profile : Main@High Format settings : BVOP Format settings, BVOP : Yes Format settings, BVOP : Yes Format settings, Matrix : Default Format settings, Matrix : Default Format settings, GOP : M=3, N=12 Internet media type : video/MPV Codec ID : V_MPEG2 Codec ID/Info : MPEG 1 or 2 Video Codec ID/Url : http://ffdshow-tryout.sourceforge.net/ Duration : 1137177.708333 Duration : 18 min 57 s Duration : 18 min 57 s 178 ms Duration : 18 min 57 s Duration : 00:18:57.178 Duration : 00:18:56:01 Duration : 00:18:57.178 (00:18:56:01) Bit rate mode : VBR Bit rate mode : Variable Bit rate : 17805360 Bit rate : 17.8 Mb/s Maximum bit rate : 35000000 Maximum bit rate : 35.0 Mb/s Width : 1920 Width : 1 920 pixels Height : 1080 Height : 1 080 pixels Sampled_Width : 1920 Sampled_Height : 1080 Pixel aspect ratio : 1.000 Display aspect ratio : 1.778 Display aspect ratio : 16:9 Frame rate mode : CFR Frame rate mode : Constant Frame rate : 23.976 Frame rate : 23.976 (24000/1001) FPS FrameRate_Num : 24000 FrameRate_Den : 1001 Frame count : 27265 Color space : YUV Chroma subsampling : 4:2:0 Chroma subsampling : 4:2:0 Bit depth : 8 Bit depth : 8 bits Scan type : Progressive Scan type : Progressive Compression mode : Lossy Compression mode : Lossy Bits/(Pixel*Frame) : 0.358 Delay : 0 Delay : 00:00:00.000 Delay : 00:00:00:00 Delay : 00:00:00.000 (00:00:00:00) Delay, origin : Container Delay, origin : Container Delay_Original : 4604417 Delay_Original : 1 h 16 min Delay_Original : 1 h 16 min 44 s 417 ms Delay_Original : 1 h 16 min Delay_Original : 01:16:44.417 Delay_Original : 01:16:39:20 Delay_Original : 01:16:44.417 (01:16:39:20) Delay_Original_Settings : drop_frame_flag=0 / closed_gop=1 / broken_link=0 Delay_Original_DropFrame : No Delay_Original_Source : Stream Time code of first frame : 01:16:44:10 TimeCode_DropFrame : No Time code source : Group of pictures header GOP, Open/Closed : Open GOP, Open/Closed : Open GOP, Open/Closed of first frame : Closed GOP, Open/Closed of first frame : Closed Stream size : 2530980768 Stream size : 2.36 GiB (98%) Stream size : 2 GiB Stream size : 2.4 GiB Stream size : 2.36 GiB Stream size : 2.357 GiB Stream size : 2.36 GiB (98%) Proportion of this stream : 0.98199 Language : en Language : English Language : English Language : en Language : eng Language : en Default : No Default : No Forced : No Forced : No Buffer size : 1222656 Original source medium : Blu-ray intra_dc_precision : 10

Since it's file from MakeMKV, Hybrid interprets it as:
video_fps: 29.97 video_interlace: telecine (soft)
The Vapoursynth script looks fine to me:
# Imports import vapoursynth as vs # getting Vapoursynth core import sys import os core = vs.core # Import scripts folder scriptPath = 'C:/Program Files/Hybrid/64bit/vsscripts' sys.path.insert(0, os.path.abspath(scriptPath)) # loading plugins core.std.LoadPlugin(path="C:/Program Files/Hybrid/64bit/vsfilters/SourceFilter/DGDecNV/DGDecodeNV.dll") # Import scripts import validate # Source: 'G:\RIPS\test\Monty Python And The Holy Grail_t03.mkv' # Current color space: YUV420P8, bit depth: 8, resolution: 1920x1080, frame rate: 29.97fps, scanorder: telecine (soft), yuv luminance scale: limited, matrix: 709, format: mpeg-2 # Loading G:\RIPS\test\Monty Python And The Holy Grail_t03.mkv using DGSource # using 'softpulldown' through DGDecNV clip = core.dgdecodenv.DGSource("F:/Hybrid Temp/SCRIPTID_:_.dgi",fieldop=1)# 23.976 fps, scanorder: progressive # Making sure content is preceived as frame based frame = clip.get_frame(0) # setting color matrix to 709. clip = core.std.SetFrameProps(clip, _Matrix=vs.MATRIX_BT709) # setting color transfer (vs.TRANSFER_BT709), if it is not set. if validate.transferIsInvalid(clip): clip = core.std.SetFrameProps(clip=clip, _Transfer=vs.TRANSFER_BT709) # setting color primaries info (to vs.PRIMARIES_BT709), if it is not set. if validate.primariesIsInvalid(clip): clip = core.std.SetFrameProps(clip=clip, _Primaries=vs.PRIMARIES_BT709) # setting color range to TV (limited) range. clip = core.std.SetFrameProps(clip=clip, _ColorRange=vs.RANGE_LIMITED) # making sure frame rate is set to 23.976fps clip = core.std.AssumeFPS(clip=clip, fpsnum=24000, fpsden=1001) # making sure the detected scan type is set (detected: progressive) clip = core.std.SetFrameProps(clip=clip, _FieldBased=vs.FIELD_PROGRESSIVE) # progressive # set output frame rate to 23.976fps (progressive) clip = core.std.AssumeFPS(clip=clip, fpsnum=24000, fpsden=1001) # output clip.set_output()
Since DGDecNV was used even if MakeMKV did change something and the source isn't soft telecine, but progressive, DGDecNV should output 23.976 fps progressive.

According to x264 21812 frames wre encoded which @23.976 would match a length of ~ 15min 9sec which is shorter than the length reported by MediaInfo (18 min 57 s).

=> would need the source to look further into it.
Assuming there is something wrong with the flags or MakeMKV did change something in their packaging, does the preview show combing if you overwrite the scantype to 'progressive' ?

Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Offline between (including) 29th of June and 5th of July => RochHarz Festival
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#4
(23.04.2025, 16:06)Selur Wrote: Assuming there is something wrong with the flags or MakeMKV did change something in their packaging, does the preview show combing if you overwrite the scantype to 'progressive' ?

Cu Selur

No. There is no combing. But it does play back fast just like before (fast video, but same audio playback speed). Here is a debug if that helps. I can try and cut down a sample too.

Here is a sample. It's the first 1:15 of the video.  https://www.dropbox.com/scl/fi/5o2vh0koe...y8te6&dl=0
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#5
Can you reproduce the problem with your sample? I can't. (That sample gets detected as 23.976 fps, all frames seem to be there and playback of a reencoded file seems fine)
Did you try different source filters?

Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Offline between (including) 29th of June and 5th of July => RochHarz Festival
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#6
(24.04.2025, 05:25)Selur Wrote: Can you reproduce the problem with your sample? I can't. (That sample gets detected as 23.976 fps, all frames seem to be there and playback of a reencoded file seems fine)
Did you try different source filters?

Cu Selur

Oh weird. I just tried to duplicate the issue with the sample and I wasn't able to. It came out just fine. I will try to cut a larger sample and see if I can reproduce the issue with that.

Update: It's possible the issue must have been with MakeMKV or something because I keep using MKVToolNix to trim the file before I use hybrid to re-encode, and I cannot reproduce the issue from a file that was cut from MKVToolNix. So, my workaround was to trim off the last second of the video, keep the remainder, and re-encode with Hybrid; and it worked out just fine!
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#7
Remuxing with mkvtoolnix without cutting probably is fine too.
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Offline between (including) 29th of June and 5th of July => RochHarz Festival
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