[MPlayer-dev-eng] dynamic A/V sync possibility in EDL

[D Richard Felker III]

On Wed, Feb 12, 2003 at 08:13:46AM -0700, Michael Halcrow wrote:
> On Wed, 2003-02-12 at 05:06, Kövesdi György wrote:
> > Hi,
> > 
> > I don't know if the EDL file format is a standard or not (i don't 
> > want to violate any standards)
> 
> I did not think out the EDL format very carefully. I just needed
> something that worked while I coded the actual functionality. I would
> prefer the format to be XML-based, so you could have a format that looks
> something like this:
> 
> <edlentry>
>         <action>0</action>
>         <start unit=second>34.4</start>
>         <end unit=second>35.2</end>
>         <category>advertisement</category>
> </edlentry>
> 
> or:
> 
> <edlentry>
>         <action>
>                 <libmpcodec name="boxblur" params="3:4"/>
>         </action>
>         <start unit=frame>1002</start>
>         <duration unit=second>2.5</duration>
> </edlentry>
> 
> or:
> 
> <edlentry>
>         <action>2</action>
>         <start unit=frame>2420</start>
>         <!-- Zero length -->
> </edlentry>
> 
> >, but i added a feature which can 
> > change the A/V sync during playback and encoding too. I think it can 
> > (at least temporarily) resolve some A/V sync problems.
> 
> I've thought about doing this. Actually, with an XML format, it would
> not be hard to modify EDL to be able to perform *any* operation that
> MPlayer can do. Like change the brightness/contrast, change A/V sync,
> change volume, etc.

What on earth is the point in an XML-based format? It's horribly
verbose and hideous to edit by hand (and somewhat painful to parse
unless you use silly libs), and as far as I can tell it has no
advantages. The same stuff you're talking about could be done with a
nice simple flat text format.

Rich