I created a test video file. When I play this same video file using windows media player and VLC, and I set both of them not to scale the video, I expect the size of the video displayed on screen to be exactly same. But I find the size is different. I used a screen ruler to measure the size and here is what I find :
- Windows media player : 641 x 369 for aspect ratio of 1.73
- VLC : 721 x 416 for aspect ratio of 1.73
Well, at least the aspect ratio is same. But why is the display size different between the 2 players?
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The test video file has these properties 720x480 (and I am not expecting the display size to match 720x480). Video was created from Vegas. File extension is .avi.
KoolK
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Windows Media Player is a piece of absolute garbage. I am not kidding when I say that I really wonder if it would even be possible to make it suck more than it does right now. Often it refuses to play files that it should have no problems with so I guess to a certain extent you're lucky that it played your file at all, even if at the wrong resolution.
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As suggested by 'aedipuss', copying the output of mediainfo on the test video file below.
General
Complete name : <cut>.avi
Format : AVI
Format/Info : Audio Video Interleave
Format_Commercial_IfAny : DV
File size : 30.5 MiB
Duration : 8s 375ms
Overall bit rate : 30.5 Mbps
Recorded date : 2011-08-06 08:57:19.000
TCOD : 0
TCDO : 83750333
Video
ID : 0
Format : DV
Codec ID : dvsd
Codec ID/Hint : Sony
Duration : 8s 375ms
Bit rate mode : Constant
Bit rate : 24.4 Mbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:1:1
Bit depth : 8 bits
Scan type : Interlaced
Compression mode : Lossy
Bits/(Pixel*Frame) : 2.357
Stream size : 28.7 MiB (94%)
Audio
ID : 1
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Signed
Codec ID : 1
Codec ID/Hint : Microsoft
Duration : 8s 375ms
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 1.53 MiB (5%)
Interleave, duration : 262 ms (7.84 video frames)
Interleave, preload duration : 266 ms
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DVavi isn't a square pixel format. it's either under 1 for 4:3 or over 1 for 16/9. for display purposes it should be 640x480 for 4:3 or 854x480 for 16/9 if you are working with ntsc.
in vlc play the video and go to tools/video info to see what it thinks it's playing. you can alway take a snapshot with vlc while it's playing in png format and that will give you the exact size of the video on the screen.--
"a lot of people are better dead" - prisoner KSC2-303
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