VMD-L Mailing List

From: Josh Vermaas (vermaas2_at_illinois.edu)
Date: Sat Feb 28 2015 - 13:11:03 CST

Hi Anu,

Resize your display before making the images. ffmpeg is complaining that
the dimensions of the jpg files isn't divisible by 2, probably since the
codec you were encoding it with demands it. To change the size of the
VMD window, the command is:

display resize 800 800

Which would resize the VMD window to 800 x 800 pixels.
-Josh Vermaas

On 02/28/2015 11:07 AM, anu chandra wrote:
> Dear Maxim,
>
>
> Thanks fro the quick reply. I try to do as you suggested, but
> encountered with an error as below.
>
> I have files named - *final.untitled.00000.jpg,
> final.untitled.00001.jpg,......, final.untitled.00020.jpg.
> *
> I executed the command, *ffmpeg -r 0.5 -i final.untitled.%05d.jpg -c:v
> libx264 -r 30 output.mpg*, which unfortunately ended-up with some
> errors as below.
>
>
>
> ffmpeg version 1.2.6-7:1.2.6-1~trusty1 Copyright (c) 2000-2014 the
> FFmpeg developers
> built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
> configuration: --arch=amd64 --disable-stripping --enable-avresample
> --enable-pthreads --enable-runtime-cpudetect
> --extra-version='7:1.2.6-1~trusty1' --libdir=/usr/lib/x86_64-linux-gnu
> --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype
> --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame
> --enable-librtmp --enable-libopencv --enable-libopenjpeg
> --enable-libopus --enable-libpulse --enable-libschroedinger
> --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau
> --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl
> --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264
> --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
> libavutil 52. 18.100 / 52. 18.100
> libavcodec 54. 92.100 / 54. 92.100
> libavformat 54. 63.104 / 54. 63.104
> libavdevice 53. 5.103 / 53. 5.103
> libavfilter 3. 42.103 / 3. 42.103
> libswscale 2. 2.100 / 2. 2.100
> libswresample 0. 17.102 / 0. 17.102
> libpostproc 52. 2.100 / 52. 2.100
> Input #0, image2, from 'final.untitled.%05d.jpg':
> Duration: 00:00:00.80, start: 0.000000, bitrate: N/A
> Stream #0:0: Video: mjpeg, yuvj444p, 669x716 [SAR 72:72 DAR
> 669:716], 25 fps, 25 tbr, 25 tbn, 25 tbc
> *[libx264 @ 0x1e48780] width not divisible by 2 (669x716)*
> Output #0, mpeg, to 'output.mpg':
> Stream #0:0: Video: h264, yuvj420p, 669x716 [SAR 1:1 DAR 669:716],
> q=-1--1, 90k tbn, 30 tbc
> Stream mapping:
> Stream #0:0 -> #0:0 (mjpeg -> libx264)
> *Error while opening encoder for output stream #0:0 - maybe incorrect
> parameters such as bit_rate, rate, width or height*
>
>
> Can you please help me to figure out what went wrong here.
>
> Many thanks
> Anu
>
> On Sat, Feb 28, 2015 at 8:53 PM, Maxim Belkin <mbelkin_at_ks.uiuc.edu
> <mailto:mbelkin_at_ks.uiuc.edu>> wrote:
>
> You got it right. You have to use console for the second step. And
> yes, you have to have ffmpeg, so install it if you currently don’t
> have it.
> ‘03d’ simply expands to a sequence 001, 002, 003, …
> d - means integer
> 3 - minimum number of characters to use for the value
> 0 - if the number uses less than 3 characters - fill them with zeros.
>
> In my example, images are assumed to be named like this:
> imagename001.png imagename002.png imagename003.png ...
> If you don’t have zeros, simply use %d
>
> Maxim
>
>> On Feb 28, 2015, at 07:49, anu chandra <anu80125_at_gmail.com
>> <mailto:anu80125_at_gmail.com>> wrote:
>>
>> Dear john and Maxim,
>>
>> Thanks for the reply.
>>
>> @ Maxim,
>>
>> Can you please explain me a little more about your solution. If I
>> am right, all you suggesting to do is
>>
>> 1. For each of the 20 frames, render the image in png fromat
>> using VMD
>>
>> 2. Then use ffmpeg command as you mentioned to create the movie.
>>
>> Do I have to use VMD console for the second step or I should do
>> in command line from a terminal? Do I have to install ffmpeg in
>> my computer with Ubuntu 14.04 LTS fro this? Can you please brief
>> me the '%03d' in the image naming. Please excuse me for asking
>> you the basics, as I am new to linux.
>>
>>
>> Many thanks in advance
>>
>> Anu
>>
>> On Sat, Feb 28, 2015 at 2:12 AM, Maxim Belkin
>> <mbelkin_at_ks.uiuc.edu <mailto:mbelkin_at_ks.uiuc.edu>> wrote:
>>
>> Alternative solution is to use VMD to render movie frames and
>> then use ffmpeg to render your movie with desired FPS rate.
>>
>> ffmpeg -r 0.5 -i imagename%03d.png -c:v libx264 -r 30 output.mp4
>>
>> Here, every frame will be displayed for 2 seconds (0.5 fps).
>>
>> Maxim
>>
>> > On Feb 27, 2015, at 2:31 PM, John Stone <johns_at_ks.uiuc.edu
>> <mailto:johns_at_ks.uiuc.edu>> wrote:
>> >
>> > Most movie formats display images at 24 or 30 frames per
>> second.
>> > To make a longer movie with VMD, you can either load a
>> larger number
>> > of frames from your simulation trajectory (that's what I'd
>> do) and
>> > use that for your movie, or, if that isn't possible, you can
>> > duplicate each frame 10 times, and than you'll get
>> something that
>> > lasts for about 8 seconds.
>> >
>> > Cheers,
>> > John Stone
>> > vmd_at_ks.uiuc.edu <mailto:vmd_at_ks.uiuc.edu>
>> >
>> > On Sat, Feb 28, 2015 at 01:54:59AM +0530, anu chandra wrote:
>> >> Dear VMD users,
>> >>
>> >> I am trying to make 30second movie with VMD movie making
>> utility. I have a
>> >> short 20 frame trajectory and movie making with
>> 'tajectory' option
>> >> generate only a very short movie ( last for only 6-8
>> seconds), even though
>> >> I tried changing the 'time duration' options many times.
>> Is there a way in
>> >> VMD where I can make a movie with such a short (20
>> frame) trajectory?
>> >>
>> >> Many thanks in advance
>> >>
>> >> Anu
>> >
>> > --
>> > NIH Center for Macromolecular Modeling and Bioinformatics
>> > Beckman Institute for Advanced Science and Technology
>> > University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
>> > http://www.ks.uiuc.edu/~johns/
>> <http://www.ks.uiuc.edu/%7Ejohns/> Phone:
>> 217-244-3349 <tel:217-244-3349>
>> > http://www.ks.uiuc.edu/Research/vmd/
>>
>>
>
>