[FFmpeg-trac] #4814(undetermined:new): swscale default alpha blending drops alpha

FFmpeg trac at avcodec.org
Thu Sep 10 13:19:04 CEST 2015

#4814: swscale default alpha blending drops alpha
             Reporter:  michael      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  swscale,     |               Resolution:
  alpha                              |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by cehoyos):

 Replying to [comment:12 projectsymphony]:
 > Replying to [comment:11 cehoyos]:
 > > > > > is there a benchmark related to the performance impact that
 @cehoyos and @michael suggest?
 > > > >
 > > > > You mean additional (per-pixel) code comes for free?
 > > >
 > > > Depends on how that code is written. Usually people run benchmarks
 for what a code change encompasses before claiming that something has a
 huge performance impact.
 > >
 > > Did I really say the impact is huge?
 > From our other favourite bug:
 > "No, I don't think a default massive performance regression is
 > huge and massive are synonyms.

 You are right, sorry.

 > > > > Maybe in avconv...
 > > >
 > > > How is this comment related to anything here? Please go troll
 > >
 > > Lol, that is a funny argument when it comes from you!
 > Not really sure why I deserve this comment. I restate, please go troll

 If a developer exclusively working for a project that has done everything
 to destroy FFmpeg (although maybe using FFmpeg exclusively?) is opening
 tickets on our bugtracker under an alias personality, I think "trolling"
 is not exactly a wrong description.

 > Any update on thig bug?

 A patch was posted on the development mailing list, please comment there.
 It makes no sense to discuss patches here on track.

Ticket URL: <https://trac.ffmpeg.org/ticket/4814#comment:13>
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