VideoInspector : Codecs, infos... - Page 2

SeeMoreDigital · 4th February 2004, 21:00

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

Kyle_Katarn · 4th February 2004, 21:51

Great ! I'll give this a look.

Kyle_Katarn · 4th February 2004, 21:52

Quote:

Originally posted by SeeMoreDigital
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

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

SeeMoreDigital · 4th February 2004, 22:40

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

Kyle_Katarn · 4th February 2004, 22:43

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...

SeeMoreDigital · 4th February 2004, 23:18

Quote:

Originally posted by Kyle_Katarn
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

Kyle_Katarn · 4th February 2004, 23:27

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

SeeMoreDigital · 4th February 2004, 23:51

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

Kyle_Katarn · 4th February 2004, 23:55

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

SeeMoreDigital · 5th February 2004, 00:22

Quote:

Originally posted by Kyle_Katarn
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

Kyle_Katarn · 5th February 2004, 00:27

I'll think about it, good idea !

cjaar · 5th February 2004, 06:06

@Kyle_KatarnA

how about supporting ogm ???

thx
cjaar

Kyle_Katarn · 5th February 2004, 21:08

Planned too.

Kyle_Katarn · 8th February 2004, 20:53

VideoToolbox has just been updated to v0.8.0.35

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

Change log :

Code:

----------------------------
VTB v0.8.0.35   [08/02/2004]
----------------------------
+ QuickTime Support
+ Indonesian language file
+ [MPEG] : Added support for "mpe" file extension
@ [CodecDB] : More explicit AAC codec names for Matroska
@ [MPEG] : Format detection
# [MPEG] : Duration detection on small files
# [MKV] : Resolution detection

SeeMoreDigital · 8th February 2004, 21:27

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

Kyle_Katarn · 8th February 2004, 21:57

Ok i'll update the database !

Kyle_Katarn · 15th February 2004, 23:37

New version !

Code:

----------------------------
VTB v0.8.1.36   [15/02/2004]
----------------------------
+ Danish language file
+ Dutch language file
@ Install Script
@ Codec database
# [AVI] Codec (FourCC) detection

Kyle_Katarn · 24th March 2004, 19:06

Quote:

----------------------------
VTB v0.9.0.37 [24/03/2004]
----------------------------
+ Ability to download codecs (thanks to MovieCodecs.com)
@ Language files

Kyle_Katarn · 15th April 2004, 11:30

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

SeeMoreDigital · 15th April 2004, 11:38

Quote:

Originally posted by Kyle_Katarn
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

4th February 2004, 21:00	#21 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	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 __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

4th February 2004, 21:51	#22 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	Great ! I'll give this a look. __________________ KC Softwares http://www.kcsoftwares.com

4th February 2004, 22:40	#24 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	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 __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

4th February 2004, 22:43	#25 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	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... __________________ KC Softwares http://www.kcsoftwares.com

4th February 2004, 23:27	#27 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	I try to estimate it the best as i can... exact estimation require the entire file to be parsed... long and CPU consumming ;-) __________________ KC Softwares http://www.kcsoftwares.com

4th February 2004, 23:51	#28 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	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 __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

4th February 2004, 23:55	#29 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	For "audio only" you should you my "K-MP3" (which i should have called AudioToolbox...) __________________ KC Softwares http://www.kcsoftwares.com

5th February 2004, 00:27	#31 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	I'll think about it, good idea ! __________________ KC Softwares http://www.kcsoftwares.com

5th February 2004, 06:06	#32 \| Link
cjaar Registered User Join Date: Mar 2002 Posts: 186	@Kyle_KatarnA how about supporting ogm ??? thx cjaar

5th February 2004, 21:08	#33 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	Planned too. __________________ KC Softwares http://www.kcsoftwares.com

8th February 2004, 21:27	#35 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	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 __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

8th February 2004, 21:57	#36 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	Ok i'll update the database ! __________________ KC Softwares http://www.kcsoftwares.com

15th February 2004, 23:37	#37 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	New version ! Code: ---------------------------- VTB v0.8.1.36 [15/02/2004] ---------------------------- + Danish language file + Dutch language file @ Install Script @ Codec database # [AVI] Codec (FourCC) detection __________________ KC Softwares http://www.kcsoftwares.com

15th April 2004, 11:30	#39 \| Link
Kyle_Katarn Registered User Join Date: Jul 2003 Posts: 271	New version : http://www.kcsoftwares.com/?vtb __________________ KC Softwares http://www.kcsoftwares.com

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