Verificar se existe a biblioteca no repositório

Debian ou derivado
apt-cache search libavcodec

Instalar dependendo do resultado
apt-get install <pacote>

Red Hat ou derivado
yum search libavcodec

Instalar dependendo do resultado
yum install <pacote>

-------- Mensagem original --------
De : elmanoferrer <elmanofer...@hotmail.com> 
Data: 06/01/2014  20h10  (GMT-03:00) 
Para: Paulo Correia <psc...@hotmail.com>,dup 
<debian-user-portuguese@lists.debian.org> 
Assunto: Re: Mencoder erro ao converter para mjpeg 
 
supported Could not open codec. FATAL: Cannot initialize video driver.




Enviado do tablet Samsung



-------- Mensagem original --------
De : Paulo Correia <psc...@hotmail.com> 
Data: 06/01/2014 20h01 (GMT-03:00) 
Para: dup <debian-user-portuguese@lists.debian.org> 
Assunto: Mencoder erro ao converter para mjpeg 



Amigos estou usando a seguinte linha de comando:
mencoder convertVideo.avi -o video.mjpeg -ovc lavc -lavcopts 
vcodec=mjpeg -nosound

Obtenho a saída:

MEncoder 1.1-4.7 (C) 2000-2012 MPlayer Team success: format: 0 data: 0x0 
- 0x866b32a libavformat version 54.6.100 (internal) AVI file format 
detected. [aviheader] Video stream found, -vid 0 VIDEO: [WMV2] 720x480 
24bpp 29.794 fps 1934.8 kbps (236.2 kbyte/s) [V] filefmt:3 
fourcc:0x32564D57 size:720x480 fps:29.794 ftime:=0.0336 libavcodec 
version 54.23.100 (internal) Opening video filter: [expand osd=1] 
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 
========================================================================== 
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family 
Selected video codec: [ffwmv2] vfm: ffmpeg (FFmpeg WMV2/WMV8) 
========================================================================== 
Movie-Aspect is undefined - no prescaling applied. videocodec: 
libavcodec (720x480 fourcc=47504a4d [MJPG]) [mjpeg @ 0xe757c0]Specified 
pix_fmt is not supported Could not open codec. FATAL: Cannot initialize 
video driver. Movie-Aspect is undefined - no prescaling applied. 
videocodec: libavcodec (720x480 fourcc=47504a4d [MJPG]) [mjpeg @ 
0xe757c0]Specified pix_fmt is not supported Could not open codec. FATAL: 
Cannot initialize video driver.

  Já pesquisei e nada achei, alguém tem uma ideia do que falta ?


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