Gentoo Archives: gentoo-user

From: Andrew Gaydenko <a@××××××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] [OT] stretching AVI in time
Date: Tue, 26 Aug 2008 14:37:47
Message-Id: 200808261836.18479@goldspace.net
In Reply to: Re: [gentoo-user] [OT] stretching AVI in time by Willie Wong
1 ======= On Tuesday 26 August 2008, Willie Wong wrote: =======
2 > On Tue, Aug 26, 2008 at 12:34:00PM +0400, Penguin Lover Andrew Gaydenko
3 squawked:
4 > > I have a very short (probably one or few frames) avi file (display
5 > > geometry test image). How to stretch the avi in time to long period
6 > > (say, minutes)? Software? Steps?
7 >
8 > If you worry just about display, look at the -fps option in mplayer,
9 > it lets you dictate the frame rate at which the movie is played.
10 > (Though on this box here it doesn't let you stretch to ftime more than
11 > 1 sec....)
12 >
13 > A possibly better way is to (assuming your video file has really few
14 > frames)
15 >
16 > mplayer -vo jpeg <videofile>
17 >
18 > beware that if your video file has more than a few seconds, the number
19 > of frames can really pile up and give you a whole bunch of files.
20
21 Done, there was a single frame.
22
23
24 >
25 > Then you can reencode the avi thus
26 >
27 > mencoder "mf://000*jpg" -mf fps=<insert frame rate> -o <outputfile>.avi
28 > -ovc lavc -lavcopts vcodec=mpeg4
29 >
30 > (you can, of course, encode in the codec of your choosing). The files
31 > 000*jpg are the default filenames for the output of the first command.
32 > If you specified output file names in the first command, you need to
33 > change the input filenames for the second. For fps insert a number
34 > corresponding to what you want: for example, say you have 5 frames and
35 > want to stretch it to 2 minutes, then set
36 >
37 > fps=5/120
38 >
39 > (number of frames divided by the amount of total run time).
40 >
41 > Hope this helps,
42 >
43 > W
44
45 Have got:
46
47 videocodec: libavcodec (720x576 fourcc=34504d46 [FMP4])
48 [mpeg4 @ 0x11004b0]bitrate tolerance too small for bitrate
49
50 Sorry, my initial message wasn't clear: the final goal is to prepare DVD to
51 adjust a geometry of a TV with CRT.
52
53 P.S. Oh, this mencoder magic... :-)

Replies

Subject Author
Re: [gentoo-user] [OT] stretching AVI in time Florian Philipp <lists@××××××××××××××××××.net>