Gentoo Archives: gentoo-user

From: Dale <rdalek1967@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Video editing advice on formats and size of file
Date: Sat, 24 Dec 2011 01:53:26
In Reply to: Re: [gentoo-user] Video editing advice on formats and size of file by Michael Mol
1 Michael Mol wrote:
2 > Dale wrote:
3 >> Howdy,
4 >>
5 >> I been trying to get this to work right for a goooooood while now. I'm
6 >> confused here. I have some videos that I download that are split up.
7 >> Some have two or three parts and a few 4 or 5. What I can't get is this,
8 >> I can't seem to take say two 250Mb videos and make it come anywhere near
9 >> 500Mbs when spliced together. They usually end up being 1.5Gb and
10 >> sometimes much more. I use Kdenlive to do this with. I have tried every
11 >> setting that I can find. I have used exiftool to try to match the
12 >> encoding and rates and all that with no improvement or very little
13 >> improvement.
14 >>
15 >> Is there some secret spice that I am missing or something? Why can't I
16 >> take two videos and splice them together and it be something close to
17 >> the two file sizes added together? I'm not asking for a perfect fit but
18 >> at least something close. If I can get 2 250Mb videos to splice together
19 >> and be 600Mbs, that would be good enough.
20 >
21 > You're probably re-encoding, rather than simply splicing the existing
22 > streams. The resulting size will necessarily have some quality loss,
23 > and the resulting file size will depend greatly on the quality of your
24 > encoder, not just on your settings for codec choice and options.
25 >
26 > What you really want to do is repackage the audio and video streams
27 > from all your files into a single container file.
28 >
29 > Back when I was poking "simple" things like this, I used 'avidemux'.
30 > That was ages ago, and on Ubuntu, but it might work for you. You'd
31 > want to use 'copy' for your audio and video selection, to avoid any
32 > transcoding.
33 >
34 > On Ubuntu, I usually had difficulties(read: crashes) with avidemux
35 > when some tool or library it wanted wasn't installed--it wasn't smart
36 > enough to remove those options from its menus if those options weren't
37 > present. I haven't tried it on gentoo; it's plausible someone fixed
38 > that either upstream or as part of some USE flag awareness in the past
39 > couple years.
40 >
41 > I expect there are ways to do the exact same thing on the command line
42 > using ffmpeg, but I'm less familiar with that tool.
43 >
44 >
46 Well, it took some experimenting but I finally figured it out. I like
47 to have never found the save video option under the file menu. Why not
48 hide it next time. lol I can't blame it on my glasses this time
49 either. I got new ones a while back. Maybe it is stupidity. o_O
51 I will say this tho, it is dang fast. It took like 10 to 15 seconds and
52 it was done. Kdenlive took MUCH longer.
54 File size is awesome too. The two files added are very close to just
55 adding the file size of each video. I'm talking within a megabyte or two.
57 Thanks for this tip. I got a new toy to play with. lol
59 Dale
61 :-) :-)
63 --
64 I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
66 Miss the compile output? Hint:
67 EMERGE_DEFAULT_OPTS="--quiet-build=n"


Subject Author
Re: [gentoo-user] Video editing advice on formats and size of file Dale <rdalek1967@×××××.com>