[MEncoder-users] Problem using MEncoder on .JPG files

[Eric Buist]

For photo slideshows, a better solution would be dvdslideshow which
allows to show images for predetermined durations. You can also add
special effects for transitions between images, and music. MEncoder
would be ideal only if you have (many) .jpg images forming a movie. For
example, for 25fps, you would have 250 .jpg files for 10s of movie.
Eric

Franco Pellegrini a écrit :
> On Fri, Apr 11, 2008 at 11:37 AM, Enrico Mattea <ocirne94 at virgilio.it> wrote:
>   
>> Hi!
>>  I have some .JPG images to encode. They're frames from a movie I
>>  registered in a game (torcs.sourceforge.net) and I converted from png to
>>  jpg using png2jpg program. In Konsole (Linux Kubuntu 7.10) first I cd to
>>  the input directory, then I run the following command, that I found on
>>  the game's site
>>  (http://torcs.sourceforge.net/index.php?name=Sections&op=viewarticle&artid=30):
>>
>>  mencoder -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=1800 *.jpg -mf
>>  on:fps=25 -o /home/enrico/Desktop/Try1.avi
>>
>>  So it says:
>>
>>  MEncoder 2:1.0~rc2-0ubuntu1~gutsy1 (C) 2000-2007 MPlayer Team
>>  CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
>>  CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>>  Compiled with runtime CPU detection.
>>  *-mf on has been removed, use mf:// instead.
>>
>>  *So:
>>
>>  enrico at enrico:~/.torcs/captures$ mencoder -ovc lavc -lavcopts
>>  vcodec=mpeg4:vhq:vbitrate=1800 *./*jpg*/ mf:// on:fps=25 -o
>>  /home/enrico/Desktop/Try1.avi
>>  MEncoder 2:1.0~rc2-0ubuntu1~gutsy1 (C) 2000-2007 MPlayer Team
>>  CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
>>  CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>>  Compiled with runtime CPU detection.
>>
>>  WARNING: OUTPUT FILE FORMAT IS _AVI_. See -of help.
>>  File not found: '*.jpg'
>>  Failed to open *.jpg.
>>  Cannot open file/device.
>>
>>  And so (it's the last one):
>>
>>  enrico at enrico:~/.torcs/captures$ mencoder -ovc lavc -lavcopts
>>  vcodec=mpeg4:vhq:vbitrate=1800 *./*JPG*/ mf:// on:fps=25 -o
>>  /home/enrico/Desktop/Try1.avi
>>  MEncoder 2:1.0~rc2-0ubuntu1~gutsy1 (C) 2000-2007 MPlayer Team
>>  CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 7)
>>  CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>>  Compiled with runtime CPU detection.
>>
>>  WARNING: OUTPUT FILE FORMAT IS _AVI_. *See -of help*.
>>  success: format: 0  data: 0x0 - 0x65dea
>>  ============ Sorry, this file format is not recognized/supported
>>  =============
>>  === If this file is an AVI, ASF or MPEG stream, please contact the
>>  author! ===
>>  Cannot open demuxer.
>>
>>  I saw -of help, but also using other formats it always said the same
>>  error message.
>>  Could someone help me?
>>  Thanks
>>  Yours
>>  Ocirne
>>  **
>>  _______________________________________________
>>  MEncoder-users mailing list
>>  MEncoder-users at mplayerhq.hu
>>  https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>>
>>     
>
> Hi Enrico, if you take a look at mencoder's manual, there it is an
> example of what you're trying to do:
>
> Encode all *.jpg files in the current directory:
>
> mencoder "mf://*.jpg" -mf fps=25 -o output.avi -ovc lavc -lavcopts vcodec=mpeg4
>
> now... some time ago, i tried to do this for making a DVD with photos
> and some music as background, and i had problems... the thing is, that
> iirc, the output.avi file, will be a video in which every frame is a
> jpg... i never could have a photo, say 6 seconds, showing, then other
> one, etc... i wanted to do like a "memories" kind of thing... i didn't
> however had enough spare time to play around and do it, so if you
> manage to do it, would you paste here the command you used?
>
> thanks and good luck,
> Franco
>
>