Increase VIDIOC_REQBUFS count from 2 to 4

media/video/capture/linux/video_capture_device_linux.cc

Index: media/video/capture/linux/video_capture_device_linux.cc
diff --git a/media/video/capture/linux/video_capture_device_linux.cc b/media/video/capture/linux/video_capture_device_linux.cc
index 60d8f77d55cfe0497fe3835cdfe76f6016ff037a..341b7ec7698acb5fe7eee511308ffcb93b0c4f2e 100644
--- a/media/video/capture/linux/video_capture_device_linux.cc
+++ b/media/video/capture/linux/video_capture_device_linux.cc
@@ -29,7 +29,7 @@ namespace media {
 #define GET_V4L2_FOURCC_CHAR(a, index) ((char)( ((a) >> (8 * index)) & 0xff))
 
 // Max number of video buffers VideoCaptureDeviceLinux can allocate.
-const uint32 kMaxVideoBuffers = 2;
+const uint32 kMaxVideoBuffers = 4;

[Pawel Osciak, 2015/03/18 11:17:02]

s/kMaxVideoBuffers/kNumVideoBuffers/

 // Timeout in milliseconds v4l2_thread_ blocks waiting for a frame from the hw.
 enum { kCaptureTimeoutMs = 200 };
 // The number of continuous timeouts tolerated before treated as error.