Just as a side question....

Can somebody explain to me why it is that all these kinds of tools display different bitrate sizes for the same encode?

Cheers

Great ! I'll give this a look.

The problem comes from the fact that video bitrate are not always explicitely defined in some files (AVI...) and have to be "guessed"...

Yep,

I have to admit this has always been a bit of an annoyance for me.

Okay I understand that many encodes are now 2pass VBR but I would have thought that once the audio stream bitrate (in kbps) has been identified (and deducted from the overall file size), calculating the 'average' video stream bitrate should be quite straight forward!

I guess things would become more difficult if both the video and audio streams are variable. As maybe the only way to accurately determine the average bitrate of the entire file would be to de-mux the streams out of their container. And calculate the average bitrate of each stream against each streams file size!

But I'm no programmer or software designer. Just an end user!

Cheers

The problem also comes from "overheading" data. This means data that belongs to the container (block headers...) and not to the stream... You can only "estimate" it...

Yes, sorry about that.

As I finished writing my previous post I realized that I had not taken the encodes 'overhead' into consideration!

Maybe we could do with a tool to measure this as well ;)

Cheers

I try to estimate it the best as i can... exact estimation require the entire file to be parsed... long and CPU consumming ;-)

Yep it must be difficult,

By running a 'video only' file that I encoded at 627kbps, through various 'info' tools, the following results came up: -

AVIcheck = 652kbps
Gspot = 654kbps
MediaInfo = 657kbps
Video ToolBox = 657kbps

May I ask. Will it be your intension to add the capability to analyse 'audio only' streams, such as Mp3, AAC, AC3, DTS, WAV (in mono, 2Ch, 6Ch)?

Cheers

For "audio only" you should you my "K-MP3" (which i should have called AudioToolbox...)

If you can make a tool that can analyse - 'audio only' streams, 'video only' streams, and combined audio+video streams. Why not call it 'Media Stream Analyser' or 'MSA' for short?

Just a thought!

Cheers

I'll think about it, good idea !

@Kyle_KatarnA

how about supporting ogm ???

thx
cjaar

Planned too.

VideoToolbox has just been updated to v0.8.0.35

Web Site : http://www.katarncorp.com/?vtb

Change log :

It works great...




...Having said that I do have some thoughts!

When identifying AAC streams with SBR 'Spectral Band Replacement' it would probably be less confusing to identify them as being "AAC HE (High Efficiency)" instead of using the term "AAC Low Complexity with Spectral Band Replacement"

Great to see Quickime file identification.

Cheers

Ok i'll update the database !

New version !

New version : http://www.kcsoftwares.com/?vtb

Thanks Kyle.

I see that this is v0.9.0.39. In what way is it different fron the previous version?

Cheers