[MPlayer-users] gmplayer displays just a crop of an mp4, sample file

[Larry Reznick]

Krzysztof Duchnowski wrote:
> Larry Reznick pisze:
>   
>> That suggests the file was created with the wrong information. I wonder > if this means that VLC probed further into the file's structure, > discovered the 640x480 setting, and applied it to the whole clip.
>>     
> That must be.
> MediaInfo raport:######################################General #0Complete name        : movie.mp4Format               : MPEG-4Format/Info          : ISO 14496-1 version 2Format/Family        : MPEG-4File size            : 1.09 MiBPlayTime             : 4s 804msBit rate             : 1910 KbpsStreamSize           : 95.1 KiBMovie name/More      : OLYMPUS DIGITAL CAMERAEncoded date         : UTC 2007-11-06 16:59:22Tagged date          : UTC 2007-11-06 16:59:22Origin               : Digital Camera
> Video #0Codec                : MPEG-4 VisualPlayTime             : 4s 804msBit rate             : 1748 KbpsBit rate mode        : VBRWidth                : 320 pixelsHeight               : 240 pixelsDisplay Aspect ratio : 4/3Frame rate           : 29.970 fpsBits/(Pixel*Frame)   : 0.869StreamSize           : 1.00 MiBLanguage             : EnglishEncoded date         : UTC 2007-11-06 16:59:22Tagged date          : UTC 2007-11-06 16:59:22
>
>
> Avinaptic raport:######################################[ About file ]
> Name: movie.mp4Date: 7/11/2007 16:23:03Size: 1,146,880 bytes (1.094 MB)
> [ Generic infos ]
> Play duration: 00:00:05 (4.8048 s)Container type: MP4/MOVMajor brand: ISO Base Media version 0Creation time: 6/11/2007 16:59:22 UTCModification time: 6/11/2007 16:59:22 UTCNumber of streams: 3Type of stream nr. 1: video (mp4v)Type of stream nr. 2: odsm (mp4s)Type of stream nr. 3: sdsm (mp4s)Audio streams: 0
> [ Relevant data ]
> Resolution: VERY LOW (320 x 240)Width: multiple of 32 (GOOD)Height: multiple of 16 (GOOD)
> [ Video track ]
> Codec: mp4vResolution: 320 x 240Resolution (bitstream): 640 x 480Frame aspect ratio: 4:3 = 1.333333Pixel aspect ratio: 1:1 = 1Display aspect ratio: 4:3 = 1.333333Framerate: 29.970029 fpsNumber of frames: 144Bitrate: 1747.487512 kbps
> [ About MPEG4 encoding ]
> QPel: NoGMC: NoInterlaced: NoAspect ratio: Square pixelsQuant type: H.263
> This report was created by AVInaptic (29-09-2007) on  7 nov 2007, h 19:09:02
> -- Krzysztof 'DK75' DuchnowskiGetFirefox - http://www.mozilla.com/firefox/Konfiguracja UTF-8 dla czytników - http://evil.pl/pip/utf/_______________________________________________MPlayer-users mailing listMPlayer-users at mplayerhq.huhttp://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
>
>   

Interesting. Why would the "Resolution" be 320x240 but the "Resolution 
(bitstream)" be 640x480? It looks like an encoding error or a container 
formatting error that VLC -- possibly improperly -- compensated for, 
that MPlayer didn't until given the -demuxer lavf option. So, the 
question is whether MPlayer should honor the "Resolution" or the 
"Resolution (bitstream)" if one is somehow more correct. Again, I don't 
know the QuickTime spec very well, so someone who does would be better 
able to address this issue.

--Larry