Truco: Girar videos

Hola,

Si habéis visto los vídeos de YouTube sobre la aventura con los aviones (los enlaces a los vídeos están aquí) , un par de vídeos están "girados".

Pues buscando, he encontrado cómo girar los vídeos fácilmente.

Primero, instaláis mencoder:

[sinner@mandriva pelis]$ sudo urpmi mencoder
    ftp://ftp.free.fr/pub/Distributions_Linux/plf/mandriva/2007.1/free/release/binary/i586/mencoder-1.0-...
installing mencoder-1.0-1.rc1.11.2plf2007.1.i586.rpm from /var/cache/urpmi/rpms
Preparing...                     

      1/1: mencoder              #######################################################

[sinner@mandriva pelis]$

Luego, giráis la peli. Para ello, se usa la opción "rotate". Los valores de rotate pueden ser:

• 0 Girar 90 grados en el sentido de las agujas del reloj y darle la vuelta (opción por defecto).
• 1 Girar 90 grados en el sentido de las agujas del reloj.
• 2 Girar 90 grados en el sentido contrario de las agujas del reloj.
• 3 Girar 90 grados en el sentido contrario de las agujas del reloj y darle la vuelta.

Y el comando es:

[sinner@mandriva pelis]$  mencoder -vf rotate=1 -ovc lavc -oac copy mvi_8509.avi -o  mvi_8509girada.avi
MEncoder 1.0-1.rc1.11.2plf2007.1-4.1.2 (C) 2000-2006 MPlayer Team
CPU: Intel(R) Pentium(R) 4 CPU 3.40GHz (Family: 15, Model: 6, Stepping: 4)
CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
98 audio & 216 video codecs
success: format: 0  data: 0x0 - 0xaa2b266
AVI file format detected.
VIDEO:  [MJPG]  640x480  24bpp  30.000 fps  11430.1 kbps (1395.3 kbyte/s)
[V] filefmt:3  fourcc:0x47504A4D  size:640x480  fps:30.00  ftime:=0.0333
Opening video filter: [expand osd=1]
Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1
Opening video filter: [rotate=1]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG decoder)
==========================================================================
audiocodec: framecopy (format=1 chans=1 rate=11024 bits=8 B/s=11024 sample-1)
VDec: vo config request - 640 x 480 (preferred colorspace: Planar 422P)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
VDec: using Planar 422P as output csp (no 1)
Movie-Aspect is undefined - no prescaling applied.
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 4
SwScaler: reducing / aligning filtersize 1 -> 1
SwScaler: reducing / aligning filtersize 9 -> 8

SwScaler: BICUBIC scaler, from yuv422p to yuv420p using MMX2
SwScaler: using 4-tap MMX scaler for horizontal luminance scaling
SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling
SwScaler: using 1-tap MMX "scaler" for vertical scaling (YV12 like)
SwScaler: 640x480 -> 640x480
videocodec: libavcodec (480x640 fourcc=34504d46 [FMP4])
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.
Pos: 123.9s   3716f (100%) 77.99fps Trem:   0min  13mb  A-V:0.033 [803:88]
Flushing video frames
Writing index...
Writing header...
ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.

Video stream:  803.567 kbit/s  (100445 B/s)  size: 12441890 bytes  123.867 secs  3716 frames

Audio stream:   88.192 kbit/s  (11023 B/s)  size: 1365506 bytes  123.867 secs
[sinner@mandriva pelis]$

Y ya está :)

Salut,
Sinner