Original VHS captured video is:
HuffYUV 1.3.1, 25fps interlaced, 720x576
I want to convert this into h264, 50fps progressive, 720x576.
I use Windows 10 with Avisynth+, QTGMC, FFmpeg.
My avs script:
Convert command is:Code:AviSource("H:\vhs\videohelp.avi").ConvertToYV12() QTGMC(Preset="Slow")
And I have an issue with the output. I got stuttered in the video with 50fps..Code:./ffmpeg -i /h/videohelp.avs videohelp-QTGMC-50fps.mp4
It seems that every second frame rewinds playback.
Here is an example of the original source.
And here is deinterlaced h264, 50fps output:
Any suggestions on how to fix this?
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Wrong field order .
Also you should use ConvertToYV12(interlaced=true)
AviSource("H:\vhs\videohelp.avi") AssumeTFF() ConvertToYV12(interlaced=true) QTGMC(Preset="Slow")
thanks, but with AssumeTFF() output is with the same issue
Sorry, you're right - I didn't look too closely at the sample. But BFF will definitely be worse, there will be a jerk every 2nd frame as in your mp4
There are some messed up fields in your source . I take a closer look, if there is a pattern, there might be a way to "replace" the bad fields
This one isn't a source filter issue
And AVISource() is usually pretty good with AVI sources, assuming you have the appropriate codec installed
There are repeated fields and the pattern isn't consistent. Either in the original tape or your capturing process.
How is the capture set up?
Huffyuv 1.3.1?? That was released 19.5 years ago. The newest file in the ZIP archive has a modified date of 2000-06-16.
At least upgrade to 2.1.1, if not a more modern codec like Ut Video Codec Suite or MagicYUV.
You really need to add a line TBC passthrough to your setup, and also lower the Contrast using your card's Proc Amp controls.
Duplicate frames (i.e. an Inserted frame going by VDub's Capture Mode nomenclature)
50=49In fact, starting with frame 50, every 5th frame is a dupe. Source being 25fps, you're only able to capture 2 seconds before your capture is hosed.
[Attachment 51921 - Click to enlarge]
Red arrows indicate vertical lines that would be straight if you used line TBC. Histogram shows clipping (right edge in the brown part).
Last edited by vaporeon800; 9th Feb 2020 at 11:53. Reason: add screenshot
@poisondeathray @vaporeon800 thank you for your help, i thought that maybe source is corrupted and now i know it for sure.
will keep 25fps version of it, and maybe someday i'll recapture it with TBC