XviD Encoded videos present distorted bar at the bottom

[deadp0et]

Hello everybody.

The videos I'm encoding in XVID present a distorted area at the bottom:



Suggestions on how to troubleshoot this?

Davide

[poisondeathray]

What software or player are you using to take screenshots?

If you open the xvid encoded video in vdub, are the distortions still there?

What about another player like VLC ?

What is the source, and how are you encoding to xvid?

[deadp0et]

-Screeshots taken using VLC

-If I open encoded videos in VDub the distortions are still there

-Source files are .FLV files off Youtube. Source files are ok, they present no distortion at the bottom

-I'm encoding with VirtualDub and XviD codec "XviD Home" Profile

[poisondeathray]

I think the 8 pixels are normally not seen by some decoders (some codecs internally pad to mod16 dimensions) , so it depends how you are opening them in vdub, and what decoder you are using

You can probably crop them out for 640x360 instead of 640x368

[deadp0et]

Oh, yep, they do present the distortion when opened in VDub, so it is not an encoding problem, it is a VDub importing one I guess there's no way to fix this since it's FLV import pluging related

Thanks
Davide

[poisondeathray]

Because VLC might be using a different decoder than whatever you are using in vdub.

Those 8 pixels are not normally displayed . Another example is often HD footage is 1920x1080 , but actually internally padded to 1920x1088. On display, most decoder will crop the 8 pixels on display, so you only see 1920x1080

What does mediainfo (view=>text) say about the flv ?

How are you opening flv in vdub ? what decoder ?

[deadp0et]

Oh, I'm using an FLV import plugin, don't remember where or when downloaded it off the net. Maybe you can point me to a better one?

[poisondeathray]

Not sure of better import plugin, but it's a simple fix, just add the crop filter

Or load it another way, maybe through avisynth, or try playing with different decoder

[deadp0et]

Ok, thanks very much for your help!

Grazie tante!
Davide

[ConverterCrazy]

Hello,

I face the same problem while playing the converted m4v file in PotPlayer v.1.6.53254 but not in VLC.

Has it something to do with settings in PotPlayer?

I don't mess with default settings except for speaker configuration or Subtitle font.

Please help and share.

Thanks.

[LigH.de]

The reason is probably that your height is not macroblock aligned, means, not a multiple of 16. Decoders should have cropped off this part, poisondeathray already mentioned the quite notorious similarity for 1080 HD resolution.

[ConverterCrazy]

Thanks @LigH.de for the technical explanation.