Author Topic: Fps problem(motion stutter, jerky movements)  (Read 8615 times)

maximillan

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Fps problem(motion stutter, jerky movements)
« on: March 24, 2016, 04:23:19 PM »
Hello I'm new to this site. But I have been using avidemux 2.6 for a month now. I trying to encode a DVD which is 29.97fps originally at 2:03.221 original time. My first encode I just let avidemux do the work at mp4 H264 output, avidemux default fps output was at 59.9fps. Quality and everything was great but the only problem was the movement from action scenes and panning scenes the movement or result was jerky or stuttering. My next reencode try I changed the fps settings through filters I manually set it at 25fps movement was smooth no stutter or jerking but the resulting movie from 2:03.221 got longer to 2:27.411 so the original audio became so out of sync. Third experiment with resampling fps, I tried setting it with same as source to 29.97fps but sadly stuttering came back. I am wondering if I manually try change fps putting source at 29.97fps and setting destination at 29.97fps if I either get a longer movie time than the original or will stuttering happen. I'm just wonering how to set up avidemux to just copy the original source file's fps.
Any suggestions would be highly appreciated thanks. :D

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #1 on: March 25, 2016, 08:05:22 AM »
DVD use MPEG2 video codec, you should not encode dvd in h264? If I understand you correctly? Creating video for dvd inclusion?

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #2 on: March 25, 2016, 10:04:39 AM »
I was trying to save old family DVDs to a media player just incase some discs get damaged. I had a few that got damaged over time.

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #3 on: March 25, 2016, 12:03:26 PM »
Copy video from dvd (vob) to hard disc. Try processing from hard disc.
If you got still the same issue, install avidemux 2.5.6 alongside 2.6. And use 2.5.6 to process your family videos.
This wont work with region protected dvd's.
« Last Edit: March 25, 2016, 02:27:32 PM by Jan Gruuthuse »

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #4 on: March 25, 2016, 03:16:41 PM »
That's what I did I copied the vob files and muxed them into mkv before encoding. But I will try you suggestion on installing 2.5.6 thank you I hope this works👍

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #5 on: March 25, 2016, 03:18:17 PM »
Its not region protected DVD I burned those home movies into a blank verbatim dvd

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #6 on: March 25, 2016, 04:08:15 PM »
try vob directly into avidemux 2.5.6 without in between step mkv muxing.

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #7 on: March 25, 2016, 06:54:41 PM »
Okay I will try that and see what happens thanks.

AQUAR

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Re: Fps problem(motion stutter, jerky movements)
« Reply #8 on: March 26, 2016, 12:26:12 PM »
The stuttering might be because the home video is interlaced and needs better de-interlacing.
At the moment I think you are just weaving fields together and ADM is giving an incorrect frame rate.

Purely speculative on my part but try a de-interlacing filter like Yadif and see if it makes a difference.
 

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #9 on: March 26, 2016, 12:31:47 PM »
Or just use [Copy] for both Video Output and Audio Output with Output Format [Mkv Muxer].

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #10 on: March 26, 2016, 03:12:37 PM »
AQUAR- I'm not sure if the video is interlaced or not but I will definitely look on it and give it a try I just waiting for the encode experiments I'm trying now to be done and see if it's okay or not based on earlier suggestions. But if it does not work out well I'll into your suggestion thanks.👍

maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #11 on: March 26, 2016, 03:16:06 PM »
Jan Gruuthuse- muxing would have the file still in vob yes it's easy and tried it no problems with the result, but I was hoping to save it in mp4 form on my hd.☺

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #12 on: March 26, 2016, 04:52:34 PM »
x264:
Could likely be in this case that Quality is to high when Constant Rate Factor (Single Pass) is used, low number (20, ...), increase the number (lower quality).
Mark 1 minute of your video for testing, preferable where you noticed the stuttering. Try 23 to 27 and see if this improves.




maximillan

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Re: Fps problem(motion stutter, jerky movements)
« Reply #13 on: March 26, 2016, 06:49:21 PM »
Okay thanks Jan I will try to increase crf to 30 usually it ranges from 20 to 25 from previous encodes. I will also try 23 or 27 but 25 is out of the question I tried it and it dramatically increased the total play time of the video compared to the original one.

Jan Gruuthuse

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Re: Fps problem(motion stutter, jerky movements)
« Reply #14 on: March 27, 2016, 07:00:10 AM »
|-- x264 Configuration --|
[General]
Rate Control
Encoding Mode [Constant Rate Factor (Single Pass) ]

Should not influence playing time.