From: Jean-Baptiste Mardelle <jb@kdenlive.org>
Date: Thu, 3 Jan 2013 13:43:34 +0000 (+0100)
Subject: Disable screen grab if FFmpeg does not support it: http://kdenlive.org/mantis/view... 
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=f15361123a17fd8bcd0f42aab9eabdd07e5acf7d;p=kdenlive

Disable screen grab if FFmpeg does not support it: http://kdenlive.org/mantis/view.php?id=2643
---

diff --git a/src/recmonitor.cpp b/src/recmonitor.cpp
index cb117df9..06dba63e 100644
--- a/src/recmonitor.cpp
+++ b/src/recmonitor.cpp
@@ -262,7 +262,14 @@ void RecMonitor::slotVideoDeviceChanged(int ix)
 	    if (exepath.isEmpty()) video_frame->setPixmap(mergeSideBySide(KIcon("dialog-warning").pixmap(QSize(50, 50)), i18n("ffmpeg or avconv not found,\n please install it for screen grabs")));
 	    else KdenliveSettings::setFfmpegpath(exepath);
 	}
-        if (!KdenliveSettings::ffmpegpath().isEmpty()) video_frame->setPixmap(mergeSideBySide(KIcon("video-display").pixmap(QSize(50, 50)), i18n("Press record button\nto start screen capture\nFiles will be saved in:\n%1", m_capturePath)));
+        if (!KdenliveSettings::ffmpegpath().isEmpty()) {
+	    if (!Render::checkX11Grab()) {
+		// FFmpeg does not support screen grab
+		video_frame->setPixmap(mergeSideBySide(KIcon("dialog-warning").pixmap(QSize(50, 50)), i18n("Your FFmpeg / Libav installation\n does not support screen grab")));
+		m_recAction->setEnabled(false);
+	    }
+	    else video_frame->setPixmap(mergeSideBySide(KIcon("video-display").pixmap(QSize(50, 50)), i18n("Press record button\nto start screen capture\nFiles will be saved in:\n%1", m_capturePath)));
+	}
         //video_frame->setText(i18n("Press record button\nto start screen capture"));
         break;
     case VIDEO4LINUX:
diff --git a/src/renderer.cpp b/src/renderer.cpp
index 79873c2b..15673b70 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -4737,5 +4737,19 @@ void Render::slotMultiStreamProducerFound(const QString path, QList<int> audio_l
     }
 }
 
+//static 
+bool Render::checkX11Grab()
+{
+    if (KdenliveSettings::rendererpath().isEmpty() || KdenliveSettings::ffmpegpath().isEmpty()) return false;
+    QProcess p;
+    QStringList args;
+    args << "avformat:f-list";
+    p.start(KdenliveSettings::rendererpath(), args);
+    if (!p.waitForStarted()) return false;
+    if (!p.waitForFinished()) return false;
+    QByteArray result = p.readAllStandardError();
+    return result.contains("x11grab");
+}
+
 #include "renderer.moc"
 
diff --git a/src/renderer.h b/src/renderer.h
index 28e317c6..972feb03 100644
--- a/src/renderer.h
+++ b/src/renderer.h
@@ -335,6 +335,8 @@ Q_OBJECT public:
     int getCurrentSeekPosition() const;
     /** @brief Create a producer from url and load it in the monitor  */
     void loadUrl(const QString &url);
+    /** @brief Check if the installed FFmpeg / Libav supports x11grab */
+    static bool checkX11Grab();
     
     QSemaphore showFrameSemaphore;
     bool externalConsumer;