Poor HD performance with appsink

[Aleix Conchillo Flaqué]

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