Re: Video Editing

From	Lewis <g.kreme@kreme.dont-email.me>
Newsgroups	comp.sys.mac.apps, comp.sys.mac.system
Subject	Re: Video Editing
Date	2020-11-14 18:46 +0000
Organization	Miskatonic U
Message-ID	<slrnrr09fe.1j07.g.kreme@ProMini.lan> (permalink)
References	(1 earlier) <i18arcF7spcU1@mid.individual.net> <romvol$3ac$1@dont-email.me> <1eNrH.550126$0W4.249829@fx42.iad> <i1abqjFjrlaU1@mid.individual.net> <eJUrH.1184696$DO2.419180@fx45.iad>

Cross-posted to 2 groups.

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In message <eJUrH.1184696$DO2.419180@fx45.iad> JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:
> On 2020-11-14 10:35, Jolly Roger wrote:
>> On 2020-11-14, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:
>>> note: I have found that by using -vcodec h264 and -acodec ac3 or aac
>>> with ffmpeg  will used up mega CPU and is slower.
>> 
>> That's because you are instructing ffmpeg to re-encode with those codecs
>> rather than "-*codec copy" which streams the content as-is and is much
>> faster as a result.


> Opposite: I found that by forcing the re-encode, I got the output video
> to start 100% OK at the time mark. When you don't do this via the
> "copy", it starts to copy frame information at the right frane, but the
> output video contains "out of context" compressed data for the first
> frames because it doesn't start with a keyframe.

This is because you don't know what you are doing.

-- 
Up the airy mountains, down the rushy glen... From ghosties and
	bogles and long-leggity beasties... My mother said I never
	should... We dare not go a-hunting for fear... And things that go
	bump... Play with the fairies in the wood... --Lords and Ladies

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Video Editing gtr <xxx@yyy.zzz> - 2020-11-12 08:06 -0800
  Re: Video Editing Savageduck <savageduck1@{REMOVESPAM}me.com> - 2020-11-12 09:57 -0800
    Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-12 10:52 -0800
  Re: Video Editing JF Mezei <jfmezei.spamnot@vaxination.ca> - 2020-11-12 14:17 -0500
    Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-12 11:45 -0800
    Re: Video Editing Jolly Roger <jollyroger@pobox.com> - 2020-11-12 19:50 +0000
      Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-12 12:04 -0800
  Re: Video Editing Jolly Roger <jollyroger@pobox.com> - 2020-11-12 19:26 +0000
    Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-12 12:07 -0800
  Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-13 10:22 +0000
    Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-13 12:26 -0800
      Re: Video Editing Jolly Roger <jollyroger@pobox.com> - 2020-11-13 21:06 +0000
        Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-13 14:01 -0800
          Re: Video Editing JF Mezei <jfmezei.spamnot@vaxination.ca> - 2020-11-14 04:14 -0500
            Re: Video Editing Jolly Roger <jollyroger@pobox.com> - 2020-11-14 15:35 +0000
              Re: Video Editing JF Mezei <jfmezei.spamnot@vaxination.ca> - 2020-11-14 12:45 -0500
                Re: Video Editing Jolly Roger <jollyroger@pobox.com> - 2020-11-14 17:55 +0000
                Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-14 18:46 +0000
      Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-14 01:12 +0000
  Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-13 11:36 -0500
    Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-13 12:24 -0800
      Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-13 19:38 -0500
        Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-13 22:46 -0800
          Re: Video Editing JF Mezei <jfmezei.spamnot@vaxination.ca> - 2020-11-14 04:30 -0500
            Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-15 08:43 -0800
          Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-14 09:56 -0500
            Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-15 08:46 -0800
              Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-15 12:03 -0500
                Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-15 18:25 +0000
                Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-15 13:39 -0500
    Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-14 00:59 +0000
      Re: Video Editing gtr <xxx@yyy.zzz> - 2020-11-13 22:47 -0800
        Re: Video Editing Lewis <g.kreme@kreme.dont-email.me> - 2020-11-14 10:01 +0000
      Re: Video Editing Alan Browne <bitbucket@blackhole.com> - 2020-11-14 09:35 -0500

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