AVI view file information

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AVI view file information

Postby norlane » Tue Dec 21, 2010 11:32 pm

if i have a video file encode with XvID and AVI container.
Is there a program that can view infomation like file header info , PAR values etc.
any thing like that thankx.
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Re: AVI view file information

Postby Enigma » Tue Dec 21, 2010 11:38 pm

GSpot
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Re: AVI view file information

Postby mirkosp » Wed Dec 22, 2010 9:17 am

MediaInfo.
GSpot is fine for AVIs, but doesn't know all codecs and fails with quite a lot of other common containers. MediaInfo tells you a LOT more stuff about a much wider variety of containers.
Be advised that neither GSpot nor MediaInfo will be accurate in reporting the framerate if it is VFR.
However, since you have an AVI Xvid, you probably have a CFR. Also I doubt it has a PAR different to 1.0, so if it looks weird, it means who encoded did it wrong.
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Re: AVI view file information

Postby Kawatta-kun » Wed Dec 22, 2010 4:19 pm

Variable frame-rate? o.O
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Re: AVI view file information

Postby mirkosp » Wed Dec 22, 2010 5:46 pm

Kawatta-kun wrote:Variable frame-rate? o.O

Yes. If a file is VFR then the reported FPS will be the average of the video. If you want to know the correct framerate of a certain part, you'll have to somehow demux the timecodes and check those (hint: when loading with ffvideosource you can make it output timecodes, should work with at least mkv and mp4).
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Re: AVI view file information

Postby Mister Hatt » Wed Dec 22, 2010 10:51 pm

>AVI
>VFR

AVI's VFRaC is still a constant rate as far as the container, or anything else really, is concerned, so that's not a problem.
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Re: AVI view file information

Postby mirkosp » Wed Dec 22, 2010 11:33 pm

Mister Hatt wrote:>AVI
>VFR

AVI's VFRaC is still a constant rate as far as the container, or anything else really, is concerned, so that's not a problem.


I know, I said the note about vfr more for a general FYI when dealing with mkvs and mp4s. The "probably" was more due to the fact that I don't really know what gets reported when dealing with those pesky 120fps AVIs full of null frames, really. :P
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Re: AVI view file information

Postby Kawatta-kun » Thu Dec 23, 2010 7:38 am

isn't fps constant? Now you caught me there out of surprise :'o
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Re: AVI view file information

Postby mirkosp » Thu Dec 23, 2010 8:30 am

For AVI it is. For MKV and MP4 it can very well be variable, and in some cases it actually SHOULD be depending on the content... even DVDs and BDs can be VFR, heh.
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Re: AVI view file information

Postby Kawatta-kun » Thu Dec 23, 2010 6:24 pm

I'm tryin' to understand. Then a video isn't actualy 25fps, for instance? Can be 20 or 24 or wtv, per second? Is like that?
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Re: AVI view file information

Postby mirkosp » Thu Dec 23, 2010 6:28 pm

Well, if a video is VFR, then some parts go at a certain framerate and others go at another framerate... that's it. Only if it is VFR though, duh. If it's CFR it's the same framerate throughout, quite obviously. :P
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Re: AVI view file information

Postby TheRyuu » Fri Dec 24, 2010 10:41 pm

mirkosp wrote:For AVI it is. For MKV and MP4 it can very well be variable, and in some cases it actually SHOULD be depending on the content... even DVDs and BDs can be VFR, heh.


There's no such thing as an arbitrary framerate in mkv or something weird like that I think.
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Re: AVI view file information

Postby mirkosp » Sat Dec 25, 2010 9:15 am

TheRyuu wrote:
mirkosp wrote:For AVI it is. For MKV and MP4 it can very well be variable, and in some cases it actually SHOULD be depending on the content... even DVDs and BDs can be VFR, heh.


There's no such thing as an arbitrary framerate in mkv or something weird like that I think.


I didn't say that... but as long as you mux in timecodes to specify it, you get a VFR. I doubt you can deny that.
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Re: AVI view file information

Postby Mister Hatt » Sun Dec 26, 2010 10:13 am

AVI isn't VFR capable but it does handle VFRaC. Saying it doesn't is a bit misleading.
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