Any quick fix to wrong frame size?

[johnjohn]

Hi,

Thanks for your message and please take my apologies. My first goal was to leave a feedback as warning that something weird is happening and unfortunately it took some time from me to understand that the file itself was harmless.

I hope you understand that it makes anyone anxious if after downloading a file and running it, unexpected processes are starting to happen.
While it's being said to be one of the first security rules, to be careful with downloads.

So what happened - I started avi, noticed that nothing hadn't changed and then appeared for a 0.5 second a unknown window with unrar header and I didn't hav time to read anything else and next unknown music started to play.
Only later I found out what had happened. The BSPlayer has a unrar built in to play mp3's which I weren't aware of existing. As BS Player "create playlist of whole dir" option was active, BS found the next in the zip (which I weren't aware of) and so it went.
My reaction was rather "normal" I guess, when avi started unexpected processes, sorry that it just took a bit longer to return to the theme and to understand what really happened.

Back to the avi - the last one is still corrupted even when playing with WMP.
I use BSPlayer a lot and such distortion is rather rare, therefore I wouldn't blame also the codecs, which btw are also up to date.

[paglamon]

Ok friend. No hard feelings. But, did you see the screenshot I posted ? Why is it playing OK in my Windows Media Player ?
Let me explain to you what I did to the files. I opened the original file in MPEG Modifier. It can change Display Aspect Ratio and Pixel Aspect Ratio without re-encoding. Effectively it just changes the header info regarding the AR flag so that the standalone unit can play it at the correct AR. So, I just changed the DAR to 4:3(in the last converted file) and saved the new file. Now,since the number of pixels have not changed, the new file now has a different Pixel Aspect Ratio than the original.(You can confirm this by opening the original file and the converted file in GSpot). But a computer screen is meant to display square pixels. So, it still goes by the original pixel count(576 x 240). You will have to "teach" the software media player to display it correctly. I do not know about BSPlayer. But in Media Player Classic you can set this right. Even the preview window of GSpot will give the correct display.

[johnjohn]

Hi,

It still playus distorted on several different computer I have tried with BS Player or with Windows Media player.

The question is important not of because this video clip but as a global problem, because approximately every 20-30 shared avi suffers of the same aspect ratio distortion, which likely is just an incompatililty of avi bit settings.

From MPEG4 Modifier homepage:
NOTE: Aspect ratio modification works by changing a flag in the VOL headers, which is ignored by most decoders.

PS. I can't check this MPEG4 Modifier utility myself as it requires .NET Framework 2.0, which was lately uninstalled for compatibility problems.

Tia

[paglamon]

I asked you to see the screenshot I posted. Does it look OK? If it does,then why is it playing OK in my WMP ? And for the last time, I advise you to try out Media Player Classic(which has the option of changing display Aspect Ratios). Does BSPlayer have the option of changing DAR ? If it has,then try to play the original file at 4:3. Looks OK then. It means that the file was meant to play at a DAR of 4:3,but somehow the cropping/resizing went awry and it ended up at 576 x 240 instead of 576 x 432. Or,the encoder forgot to enable non-square pixels for the conversion.
I also asked you to open all the files in GSpot and note the differences.Did you do that?
I asked you to try to play the file on TV through a standalone player? Did you do that ?

A solution is not possible unless we can analyse the problem ?How can we do it unless you cooperate?

which likely is just an incompatililty of avi bit settings.

What are you talking about?

[johnjohn]

As told - there is no difference with WMP.
With G-spot the
1.original distorted avi is 576x240 dar:2.4 (12:5)
2.your second still distorted avi is 576x240 dar:1.636 (18:11)
3. your third still distorted avi is 576x240 dar:1.333 (4:3)

It appears that both BS Player and WMP don't read Dar but pic wxh.

BS Player used to be extremely recource saving and has a lot of essential options. One of most important to me is easy shortcut programming.
There is also possible to change dar manually but it isn't practical with short clips.

I don't have MPC to test and can't install right it as it may mess some other settings. Neither playing in TV isn't so easy to arrange and not a purpose.


which likely is just an incompatililty of avi bit settings - a conclusion from your previous message, I mean that BS Player reads a wxh instead of dar.
But until original distorted clip has these both set wrong, it isn't much of help.
There is a bit crunching soft needed to correct these stream values.

Any ideas?

[paglamon]

So, you can see that GSpot is detecting the change in PAR and DAR.

I don't have MPC to test and can't install right it as it may mess some other settings.

MPC needs no"installation". It runs from its folder. Believe me, most of the members in this forum would swear by it.
Again, what is AVI bitsetting ? Know about bitsetting booktype for DVD-ROM and DVD+R. But don't know anything about avi bitsetting? Can you explain ?

There is a bit crunching soft needed to correct these stream values.

MPEG4 Modifier is changing the values. Whether the player can detect it is another matter altogether.That is why I asked you to try MPC and Gonwk asked you to try VLC.
Otherwise, you will have to re-encode.