Re: [PATCH 0/3] GStreamer 1.0 recipes

[Carlos Rafael Giani <dv@pseudoterminal.org>]

On 06.06.2013 22:18, Saul Wold wrote:
> On 06/06/2013 10:17 AM, Carlos Rafael Giani wrote:
>> On 06.06.2013 18:53, Saul Wold wrote:
>>> On 05/31/2013 12:15 PM, Carlos Rafael Giani wrote:
>>>> These patches introduce recipes for GStreamer 1.0 . They
>>>> are copied over from my gstreamer 1.0 layer at
>>>> https://github.com/dv1/meta-gstreamer1.0 . All files except
>>>> gstreamer1.0-plugins-package.inc were copied; gst-plugins-package.inc
>>>> was patched to fix a problem with -meta packages and can be used for
>>>> both 0.10 and 1.0 now (the only difference is the value of the LIBV
>>>> variable).
>>>>
>>> So is there an update path from 0.10 to 1.0?  Also normally we replace
>>> the older version with the newer version by "git mv" in order to
>>> preserve history where possible.  I am not sure if you can do this
>>> with a move and then copy the new versions in.
>>>
>>> Since the packages are renamed, and I don's see any
>>> RPROVIDES/RREPLACES or RCONFLICTS to cover the upgrade path.
>>>
>>
>> Replace? Why do you want to replace? 1.0 is designed to be able to
>> coexist with 1.0 in the same rootfs (you cannot use both at the same
>> time in a process; however, this isn't a concern for OE, but for
>> application developers). In essence, simply adding the new files from
>> the patch to recipes-multimedia/gstreamer/ should be sufficient. The old
>> 0.10 ones can be left unchanged.
>>
>>
> One of the core tenants of OE-Core is to only maintain the latest 
> version of a given recipe and have an upgrade path from existing 
> version to the latest version.
>
> What I am not sure about is the programs that rely on gstream if all 
> of them are ready for the 1.0.
>
> But back to the orignal question, is the gstreamer 1.0 an upgrade path 
> for 0.10 or a completely new gstreamer?  Is there an upgrade path? If 
> so, then the packaging needs to reflect that.
>
> Sau!
>

While 1.0 inherited a lot from 0.10, it is not a simple upgrade. It is 
ABI and API incompatible with 0.10. The featureset is also not 100% the 
same. This situation is comparable to Qt3 vs. Qt4 vs. Qt5, or Gtk2 vs. 
Gtk3 etc. This is why it is not a good idea to get rid of the 0.10 
recipes - you cannot simply build applications that use 0.10 with 1.0 
libraries and expect it to compile.

Carlos