PlayerComponent: use imprecise seeks when resuming on RPI

When resuming playback, an exact seek is used to set the old playback
position. Change this on RPI to imprecise seeks. Now playback can resume
slightly before the previous playback position.

Other forms of seeks still always use exact seeks. (Perhaps this should
be changed for large seeks.)

src/player/PlayerComponent.cpp

@@ -117,6 +117,9 @@ bool PlayerComponent::componentInitialize()
   mpv::qt::set_option_variant(m_mpv, "demuxer-max-bytes", 50 * 1024 * 1024); // bytes
   // Specifically for enabling mpeg4.
   mpv::qt::set_option_variant(m_mpv, "hwdec-codecs", "all");
+  // Do not use exact seeks by default. (This affects the start position in the "loadfile"
+  // command in particular. We override the seek mode for normal "seek" commands.)
+  mpv::qt::set_option_variant(m_mpv, "hr-seek", "no");
 #endif
 
   mpv_observe_property(m_mpv, 0, "pause", MPV_FORMAT_FLAG);
@@ -523,7 +526,7 @@ void PlayerComponent::seekTo(qint64 ms)
 {
   double start = mpv::qt::get_property_variant(m_mpv, "time-start").toDouble();
   QString timeStr = QString::number(ms / 1000.0 + start);
-  QStringList args = (QStringList() << "seek" << timeStr << "absolute");
+  QStringList args = (QStringList() << "seek" << timeStr << "absolute+exact");
   mpv::qt::command_variant(m_mpv, args);
 }