diff --git a/dlls/quartz/filesource.c b/dlls/quartz/filesource.c
index 6e5db5efb4d..726776bfbef 100644
--- a/dlls/quartz/filesource.c
+++ b/dlls/quartz/filesource.c
@@ -1045,6 +1045,7 @@ static HRESULT WINAPI FileAsyncReader_Request(IAsyncReader * iface, IMediaSample
 static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dwTimeout, IMediaSample ** ppSample, DWORD_PTR * pdwUser)
 {
     HRESULT hr = S_OK;
+    DWORD dwBytes = 0;
     DATAREQUEST * pDataRq = NULL;
     FileAsyncReader *This = impl_from_IAsyncReader(iface);
 
@@ -1083,7 +1084,6 @@ static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dw
 
     if (SUCCEEDED(hr))
     {
-        DWORD dwBytes;
         /* get any errors */
         if (!GetOverlappedResult(This->hFile, &pDataRq->ovl, &dwBytes, FALSE))
             hr = HRESULT_FROM_WIN32(GetLastError());
@@ -1091,6 +1091,7 @@ static HRESULT WINAPI FileAsyncReader_WaitForNext(IAsyncReader * iface, DWORD dw
 
     if (SUCCEEDED(hr))
     {
+        IMediaSample_SetActualDataLength(pDataRq->pSample, dwBytes);
         *ppSample = pDataRq->pSample;
         *pdwUser = pDataRq->dwUserData;
     }
diff --git a/dlls/quartz/pin.c b/dlls/quartz/pin.c
index 58e5beeec89..84a2c30507e 100644
--- a/dlls/quartz/pin.c
+++ b/dlls/quartz/pin.c
@@ -1198,6 +1198,7 @@ static void CALLBACK PullPin_Thread_Process(ULONG_PTR iface)
          * so that one sample is processed while one sample is fetched. However,
          * it is harder to debug so for the moment it will stay as it is */
         IMediaSample * pSample = NULL;
+        REFERENCE_TIME rtSampleStart;
         REFERENCE_TIME rtSampleStop;
         DWORD_PTR dwUser;
 
@@ -1209,10 +1210,11 @@ static void CALLBACK PullPin_Thread_Process(ULONG_PTR iface)
 
         if (SUCCEEDED(hr))
         {
-            rtSampleStop = This->rtCurrent + MEDIATIME_FROM_BYTES(IMediaSample_GetSize(pSample));
+            rtSampleStart = This->rtCurrent;
+            rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(IMediaSample_GetSize(pSample));
             if (rtSampleStop > This->rtStop)
                 rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(This->rtStop), allocProps.cbAlign));
-            hr = IMediaSample_SetTime(pSample, &This->rtCurrent, &rtSampleStop);
+            hr = IMediaSample_SetTime(pSample, &rtSampleStart, &rtSampleStop);
             This->rtCurrent = rtSampleStop;
         }
 
@@ -1225,6 +1227,14 @@ static void CALLBACK PullPin_Thread_Process(ULONG_PTR iface)
         if (SUCCEEDED(hr))
             hr = IPin_QueryPinInfo((IPin*)&This->pin, &pinInfo);
 
+        if (SUCCEEDED(hr))
+        {
+            rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(IMediaSample_GetActualDataLength(pSample));
+            if (rtSampleStop > This->rtStop)
+                rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(This->rtStop), allocProps.cbAlign));
+            hr = IMediaSample_SetTime(pSample, &rtSampleStart, &rtSampleStop);
+        }
+
         if (SUCCEEDED(hr))
             hr = This->fnSampleProc(This->pin.pUserData, pSample);
         else