Poor HD performance with appsink

Dušan Poizl poizl at maindata.sk
Thu Feb 13 07:38:53 PST 2014

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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