Regd:Video Converter Programming

[Ch3ru5]

Hi,
I want to write an avi to flv converter in php but i am a complete
newbie to it.

I would like to know the basic flow of entire process of how a
converter code is written
(ie. the basic algorithm ) .

Example: "You first create an flv stream , then compress the avi code ,
then copy that code into the flv stream created ."

The above flow may or may not be correct but what i want to know is
this flow .

Any good tutorials or resources where i can learn the basics.

Thank You,
Raja.

[placid]

Ch3ru5 wrote:

Hi,
I want to write an avi to flv converter in php but i am a complete
newbie to it.

I would like to know the basic flow of entire process of how a
converter code is written
(ie. the basic algorithm ) .

Example: "You first create an flv stream , then compress the avi code ,
then copy that code into the flv stream created ."

The above flow may or may not be correct but what i want to know is
this flow .

Any good tutorials or resources where i can learn the basics.

via a Google search for "python video convert" i found the following

http://pymedia.org/

Cheers

[Grant Edwards]

On 2006-08-09, placid <Bu****@gmail.c omwrote:

>I want to write an avi to flv converter in php but i am a complete
newbie to it.

via a Google search for "python video convert" i found the following

http://pymedia.org/

Except he wants to write it in PHP.

Not sure why he's asking us about it here in c.l.python.

--
Grant Edwards grante Yow! Like I always
at say -- nothing can beat
visi.com the BRATWURST here in
DUSSELDORF!!

[placid]

Grant Edwards wrote:

On 2006-08-09, placid <Bu****@gmail.c omwrote:

I want to write an avi to flv converter in php but i am a complete
newbie to it.

via a Google search for "python video convert" i found the following

http://pymedia.org/

Except he wants to write it in PHP.

Not sure why he's asking us about it here in c.l.python.

well if i see a post on comp.lang.pytho n, then i assume its related to
python and thats what my brain did!

[Ch3ru5]

HI,
Thanks all for replies . I am sorry for a confusion of the question .
But what i wanted to know is in general in any programming language ,
how you go about writing a video converter .

The basic flow of code . that's it . I will look into the resources in
a particular language of my choice later .
I am not clear as to how to proceed in any language .

placid wrote:

Grant Edwards wrote:

On 2006-08-09, placid <Bu****@gmail.c omwrote:

>I want to write an avi to flv converter in php but i am a complete
>newbie to it.

via a Google search for "python video convert" i found the following
>
http://pymedia.org/

Except he wants to write it in PHP.

Not sure why he's asking us about it here in c.l.python.

well if i see a post on comp.lang.pytho n, then i assume its related to
python and thats what my brain did!

[Tim Roberts]

"Ch3ru5" <mu********@gma il.comwrote:

>
Thanks all for replies . I am sorry for a confusion of the question .
But what i wanted to know is in general in any programming language ,
how you go about writing a video converter .

The problem is that converting between video formats requires LOTS of
manipulation of bitfields: pull 3 bits from here, pull 6 bits from here,
insert 9 bits there. That kind of manipulation is easier in some languages
than in others.

For example, it makes sense in C and C++. It can be done in Python,
although not as efficiently. It would be difficult in PHP.

>The basic flow of code . that's it . I will look into the resources in
a particular language of my choice later .

The basic flow depends on what formats you are converting between. To to
MPEG-to-AVI, for instance, you would normally go through the whole MPEG
decompression process to get to a series of bitmaps, then go through the
whole AVI compression process to get a movie.

If you are on Windows, you almost certainly want to use DirectShow to do
this job. There is a DirectShow interface for Python.
--
- Tim Roberts, ti**@probo.com
Providenza & Boekelheide, Inc.