Question

我试图制作一个视频播放器，按顺序无缝播放视频并循环播放。＆＃34;序列＆＃34;和＆＃34;无缝＆＃34;部分通过使用Sequencer Source解决。但是＆＃34;循环＆＃34;部分让我头疼！

我想要做的是捕获 MEEndOfPresentation 事件，当它被捕获时我会执行以下步骤：

暂停媒体会话;
抓住第一个细分ID;
使用第2步结果调用MFCreateSequencerSegmentOffset;
调用媒体会话开始使用第3步结果。

这很有效。如果我将输出节点上的 MF_TOPONODE_NOSHUTDOWN_ON_REMOVE 设置为 TRUE ，则可以正常工作。但是，这会在几分钟内产生大量内存泄漏！

如果我将 MF_TOPONODE_NOSHUTDOWN_ON_REMOVE 设置为 FALSE ，则显示的步骤无法正常工作。我使用的策略是否正确？

我记录了这些事件，看看我在比赛后接到了什么。在这里他们分别是：

MF_TOPONODE_NOSHUTDOWN_ON_REMOVE = FALSE

MENewPresentation, Event Status: S_OK
# then I queue the next segment
MESessionTopologyStatus, Event Status: S_OK, Topology Status: StartedSource
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ended
MESessionTopologyStatus, Event Status: S_OK, Topology Status: SinkSwitched
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ready
MESessionTopologyStatus, Event Status: S_OK, Topology Status: StartedSource
MEEndOfPresentation, Event Status: S_OK, Canceled: 0
# then I do the steps mentioned
MENewPresentation, Event Status: S_OK
# then I queue the next segment
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ended

MF_TOPONODE_NOSHUTDOWN_ON_REMOVE = TRUE

MENewPresentation, Event Status: S_OK
# then I queue the next segment
MESessionTopologyStatus, Event Status: S_OK, Topology Status: StartedSource
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ended
MESessionTopologyStatus, Event Status: S_OK, Topology Status: SinkSwitched
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ready
MESessionTopologyStatus, Event Status: S_OK, Topology Status: StartedSource
MEEndOfPresentation, Event Status: S_OK, Canceled: 0
# then I do the steps mentioned
MENewPresentation, Event Status: S_OK
# then I queue the next segment
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ended
MESessionTopologyStatus, Event Status: S_OK, Topology Status: SinkSwitched
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ready
MESessionTopologyStatus, Event Status: S_OK, Topology Status: StartedSource
MESessionTopologyStatus, Event Status: S_OK, Topology Status: Ended
MESessionTopologyStatus, Event Status: S_OK, Topology Status: SinkSwitched
...

P.S。我没有添加代码，因为它非常大。但如果你需要，我可以编辑我的问题。

Media Foundation - Sequencer Source Loop

0 个答案: