[MEncoder-users] Aspect problem

Alex Samad alex at samad.com.au
Mon Aug 27 05:26:03 CEST 2007


Hi

I am trying to encode from mpgpes to xvid, doing some home video to xvid, I 
have set the video camera to 16:9 and it produces .MOD files - well these are 
what i get of the hard drive.

now I use autoaspect=1 as xvidencopts, and when I play the resultant file with 
mplayer it looks the same as the original MOD file.

But when I bring it over to windows and use vlc it seems to go back to 4:3.

It look like the desired aspect ratio is 1.333

Now I am sure I have the recorder in 16:9 mode..... when I recorded in 
aspect=16:9 it looked a but wrong.


this is what I get from MOD file

Playing MOV001.MOD.                                                                                                                            
ID_VIDEO_ID=0                                                                                                                                  
ID_AUDIO_ID=128                                                                                                                                
MPEG-PS file format detected.                                                                                                                  
VIDEO:  MPEG2  704x576  (aspect 2)  25.000 fps  9542.8 kbps (1192.9 kbyte/s)                                                                   
ID_FILENAME=MOV001.MOD                                                                                                                         
ID_DEMUXER=mpegps                                                                                                                              
ID_VIDEO_FORMAT=0x10000002                                                                                                                     
ID_VIDEO_BITRATE=9542800                                                                                                                       
ID_VIDEO_WIDTH=704                                                                                                                             
ID_VIDEO_HEIGHT=576                                                                                                                            
ID_VIDEO_FPS=25.000                                                                                                                            
ID_VIDEO_ASPECT=0.0000                                                                                                                         
ID_AUDIO_FORMAT=8192                                                                                                                           
ID_AUDIO_BITRATE=0                                                                                                                             
ID_AUDIO_RATE=0                                                                                                                                
ID_AUDIO_NCH=0                                                                                                                                 
ID_LENGTH=52.76                                                                                                                                
==========================================================================                                                                     
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough                                                                                    
VDec: vo config request - 704 x 576 (preferred colorspace: Mpeg PES)                                                                           
VDec: using Mpeg PES as output csp (no 0)                                                                                                      
Movie-Aspect is undefined - no prescaling applied.                                                                                             
VO: [null] 704x576 => 704x576 Mpeg PES  [vm] [zoom]                                                                                            
Selected video codec: [mpegpes] vfm: mpegpes (MPEG-PES output (.mpg or 
DXR3/IVTV/DVB card))                                                    
==========================================================================                                                                     
ID_VIDEO_CODEC=mpegpes                                                                                                                         
==========================================================================                                                                     
Opening audio decoder: [liba52] AC3 decoding with liba52                                                                                       
Using SSE optimized IMDCT transform                                                                                                            
Using MMX optimized resampler                                                                                                                  
AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000->192000)                                                                         
ID_AUDIO_BITRATE=256000                                                                                                                        
ID_AUDIO_RATE=48000                                                                                                                            
ID_AUDIO_NCH=2                                                                                                                                 
Selected audio codec: [a52] afm: liba52 (AC3-liba52)                                                                                           
==========================================================================                                                                     
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)                                                                                              
ID_AUDIO_CODEC=a52                                                                                                                             
Starting playback...                                                                                                                           
VDec: vo config request - 704 x 576 (preferred colorspace: Mpeg PES)                                                                           
VDec: using Mpeg PES as output csp (no 0)                                                                                                      
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.                                                                                   
ID_VIDEO_ASPECT=1.3333
VO: [null] 704x576 => 768x576 Mpeg PES  [vm] [zoom]


from the resultant avi file

Playing MOV001.avi.
AVI file format detected.
ID_VIDEO_ID=0
ID_AUDIO_ID=1
VIDEO:  [DX50]  704x576  12bpp  25.000 fps  2003.5 kbps (244.6 kbyte/s)
Clip info:
 Software: MEncoder dev-SVN-rUNKNOWN-4.1.3
ID_CLIP_INFO_NAME0=Software
ID_CLIP_INFO_VALUE0=MEncoder dev-SVN-rUNKNOWN-4.1.3
ID_CLIP_INFO_N=1
ID_FILENAME=MOV001.avi
ID_DEMUXER=avi
ID_VIDEO_FORMAT=DX50
ID_VIDEO_BITRATE=2003464
ID_VIDEO_WIDTH=704
ID_VIDEO_HEIGHT=576
ID_VIDEO_FPS=25.000
ID_VIDEO_ASPECT=1.3333
ID_AUDIO_FORMAT=85
ID_AUDIO_BITRATE=192320
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0
ID_LENGTH=53.64
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
ID_VIDEO_CODEC=ffodivx
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 96.0 kbit/6.25% (ratio: 12000->192000)
ID_AUDIO_BITRATE=96000
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=2
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
ID_AUDIO_CODEC=mp3
Starting playback...
VDec: vo config request - 704 x 576 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
ID_VIDEO_ASPECT=1.3333
VO: [null] 704x576 => 768x576 Planar YV12  [vm] [zoom]
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