hello, has anyone looked into this? 2017-01-19 21:41 GMT-02:00 Mikko Rapeli <mikko.rap...@iki.fi>:
> Kdenlive used to have frame accurate preview on my slow i686 Thinkpad > laptop, not in real-time but close enough in HD resolutions. > Changes to buffering, asynchronous processing and frame dropping > screwed my time line accurace in clip and timeline previews. > > For example, zone playbacks were stopping 25 frames before end of zone > and quickly seeking to the last frame. Sometimes timeline ruler was > left off. Then stopping playback included always a 5 frame jump to the > future. These map to the buffer size and drop_max properties of > https://www.mltframework.org/doxygen/structmlt__consumer__s.html > > With these tunings set, I get a pretty and accurate timeline again. > Especially when using proxy clips which my PC can play in real time. > > Well, almost. Stopping clip playback with space or mouse clicks jumps the > time line cursor a few frames to the future. Luckily setting > zone in and out points works fine. Maybe there is some similar fix required > somewhere else? > > I thikn on faster modern machines users don't see problems like these, > except under heavy load, but to me these setting seem good defaults. > Accuracy is more important to me than real-time playback when working > with a video timeline. > > Signed-off-by: Mikko Rapeli <mikko.rap...@iki.fi> > --- > src/monitor/glwidget.cpp | 4 +++- > src/renderer.cpp | 18 ++++++------------ > 2 files changed, 9 insertions(+), 13 deletions(-) > > diff --git a/src/monitor/glwidget.cpp b/src/monitor/glwidget.cpp > index b6a5117..becd94b 100644 > --- a/src/monitor/glwidget.cpp > +++ b/src/monitor/glwidget.cpp > @@ -993,7 +993,7 @@ int GLWidget::reconfigure(Mlt::Profile *profile) > if (!KdenliveSettings::monitor_dropframes()) { > dropFrames = -dropFrames; > } > - m_consumer->set("real_time", dropFrames); > + m_consumer->set("real_time", 0); > m_threadCreateEvent = > m_consumer->listen("consumer-thread-create", > this, (mlt_listener) onThreadCreate); > m_threadJoinEvent = m_consumer->listen("consumer-thread-join", > this, (mlt_listener) onThreadJoin); > } > @@ -1049,6 +1049,8 @@ int GLWidget::reconfigure(Mlt::Profile *profile) > m_consumer->set("deinterlace_method", KdenliveSettings:: > mltdeinterlacer().toUtf8().constData()); > m_consumer->set("buffer", 25); > m_consumer->set("prefill", 1); > + m_consumer->set("real_time", 0); > + m_consumer->set("drop_max", 0); > m_consumer->set("scrub_audio", 1); > if (KdenliveSettings::monitor_gamma() == 0) { > m_consumer->set("color_trc", "iec61966_2_1"); > diff --git a/src/renderer.cpp b/src/renderer.cpp > index ceb40b8..4306074 100644 > --- a/src/renderer.cpp > +++ b/src/renderer.cpp > @@ -736,13 +736,10 @@ void Render::switchPlay(bool play, double speed) > m_mltProducer->seek(0); > } > if (m_mltConsumer->get_int("real_time") != > m_qmlView->realTime()) { > - m_mltConsumer->set("real_time", m_qmlView->realTime()); > + m_mltConsumer->set("real_time", 0); > m_mltConsumer->set("buffer", 25); > m_mltConsumer->set("prefill", 1); > - // Changes to real_time require a consumer restart if running. > - if (!m_mltConsumer->is_stopped()) { > - m_mltConsumer->stop(); > - } > + m_mltConsumer->set("drop_max", 0); > } > if (currentSpeed == 0) { > m_mltConsumer->start(); > @@ -757,9 +754,9 @@ void Render::switchPlay(bool play, double speed) > m_mltConsumer->purge(); > m_mltProducer->set_speed(0.0); > m_mltConsumer->stop(); > - m_mltConsumer->set("buffer", 0); > + m_mltConsumer->set("buffer", 25); > m_mltConsumer->set("prefill", 0); > - m_mltConsumer->set("real_time", -1); > + m_mltConsumer->set("real_time", 0); > m_mltProducer->seek(m_mltConsumer->position() + 1); > } > } > @@ -778,13 +775,10 @@ void Render::play(double speed) > resetZoneMode(); > } > if (speed != 0 && m_mltConsumer->get_int("real_time") != > m_qmlView->realTime()) { > - m_mltConsumer->set("real_time", m_qmlView->realTime()); > + m_mltConsumer->set("real_time", 0); > m_mltConsumer->set("buffer", 25); > m_mltConsumer->set("prefill", 1); > - // Changes to real_time require a consumer restart if running. > - if (!m_mltConsumer->is_stopped()) { > - m_mltConsumer->stop(); > - } > + m_mltConsumer->set("drop_max", 0); > } > if (current_speed == 0) { > m_mltConsumer->start(); > -- > 2.10.2 > > -- 1111.1010.r.i.1101|n.o.i.s.1110|i.m.1010.g.1110|مقاومة fsf member #5439 usuario GNU/Linux #471966 |_|0|_| |_|_|0| |0|0|0| <a href="http://www.gunga.com.br";>gunga</a> <a href="http://www.tempoecoarte.com.br";>tempoecoarte</a> <a href="http://www.atelier-labs.org";>atelier-labs</a> <a href="http://www.mocambos.net";>rede mocambos</a>
