Author Topic: Why are some video files so jumpy in frames?  (Read 530 times)

Vygantas

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Why are some video files so jumpy in frames?
« on: February 17, 2019, 08:59:29 AM »
Hi there, when editing 30 or 10 seconds videos, sometimes there are parts where I can only jump (as starting point) from 1st sec to 6th, etc (using jump by frame option). Making it hard to cut videos with a specific length in might, it's either 14 seconds or 24, etc. but can't be 20

Is this something that can be improved in future builds?

v271v2

eumagga0x2a

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Re: Why are some video files so jumpy in frames?
« Reply #1 on: February 17, 2019, 12:59:46 PM »
No, this is already an improvement over a total failure to advance in a video when undecodable / broken frames are encountered, implemented by [editor] Try to continue from the next keyframe if decoding fails from 2018-05-18.

eumagga0x2a

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Re: Why are some video files so jumpy in frames?
« Reply #2 on: February 17, 2019, 01:08:30 PM »
In doubt, please provide a video exhibiting this problem during frame-stepping as a sample using WeTransfer, Mega, Dropbox, Google Drive or a similar service.

Vygantas

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Re: Why are some video files so jumpy in frames?
« Reply #3 on: February 17, 2019, 07:14:16 PM »
Tried to post, but got rejected by filter. Let me repost with edit button

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Hi, here are two videos, both can be split at around every 8 seconds only, please note: these are NOT SAFE FOR WORK GIFs, meaning content for adults.

<links to samples removed>


« Last Edit: February 18, 2019, 12:42:52 AM by eumagga0x2a »

lodger

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Re: Why are some video files so jumpy in frames?
« Reply #4 on: February 17, 2019, 07:59:33 PM »
 ;D  ;D  ;D

eumagga0x2a

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Re: Why are some video files so jumpy in frames?
« Reply #5 on: February 18, 2019, 12:41:52 AM »
I misunderstood "jump by frame" as "step by frame". What you obviously meant is called "seek to keyframe" or "keyframe-based navigation".

There is nothing wrong with the samples from video-technical point of view. If you want to keep visual quality (copy mode), you must set cut points at keyframes. If you re-encode, you can set cut points at any frame you like. This is a fundamental limitation based in the very nature of video compression.