Poor HD performance with appsink

[Dušan Poizl]

I used QtGstreamer but because it is not for gstreamer-1.0 I must 
rewrite my SW to use gstreamer directly. But you can get general idea 
from this code 
http://cgit.freedesktop.org/gstreamer/qt-gstreamer/tree/elements/gstqtvideosink/painters/openglsurfacepainter.cpp 
which is where I started when I wrote my my own implementation.

Dňa 13.02.2014 16:45, Gordon Nickel wrote / napísal(a):
> Thanks for the responses. I'm using callbacks, not signals already.
>
> Dusan, how are you displaying content in OpenGL? Is there an implementation you would be willing to share?
>
> Gordon Nickel
>
> downstream.com
>
>> On Feb 13, 2014, at 7:39 AM, "Dušan Poizl" <poizl at maindata.sk> wrote:
>>
>> I am using appsink for playing video with OpenGL and have no issue. I can easily play two FullHD video fine while capturing output and pushing to appsrc to encode.
>>
>> Dňa 13.02.2014 16:14, Aleix Conchillo Flaqué wrote / napísal(a):
>>> On Wed, Feb 12, 2014 at 5:40 PM, Gordon Nickel
>>> <gordon.nickel at downstream.com> wrote:
>>>> Hi,
>>>>
>>>> I have an implementation of Gstreamer 1.0 for Windows using appsink to play
>>>> videos back. Generally, performance is pretty good, and quality is
>>>> excellent. However, with some specific videos (all 1080p, 720p seems to be
>>>> fine), the video track can get very far behind the audio, at which time the
>>>> audio starts to stutter and eventually cut out. I don't believe it's an
>>>> issue with the app itself (which generally gets 90-200 fps with videos
>>>> running), but my implementation of Gstreamer. The same videos play without
>>>> issue using playbin in gst-launch.
>>>>
>>>> I've tried setting drop frames ( gst_app_sink_set_drop to true ) and max
>>>> lateness to various values from 1 second to 0.01 seconds. In doing so, the
>>>> audio won't cut out, but the video will stutter to an unnacceptable degree
>>>> (approx 1 frame per second). I've also tried different bit rates, but have
>>>> generally stuck with h.264 for codecs. Mpeg 2 had similar performance
>>>> issues.
>>>>
>>>> Playing the video through the app but with it's own directdrawsink window
>>>> played back smoothly.
>>>>
>>>> I can provide the problem videos if that would be helpful.
>>>>
>>>> Gstreamer builds 1.0.10, 1.2.0 and 1.2.3 have all been tried with the same
>>>> results.
>>>>
>>>> Any ideas to improve performance?
>>> You might already be doing it, but do you use signals instead of
>>> callbacks? If so, use callbacks instead. Much faster.
>>>
>>> Aleix
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