Patch by Paul Sokolovsky <pmsicml _AT_ gmail _dot_ com>.

Remove unconditionally enforcing of "preferred" media type upon the capture devices. Some devices don't handle this properly, which often results in a BSOD. By not setting a preferred media type the problem dissappears. Please check this with other type of devices for any regression.

modules/access/dshow/dshow.cpp

@@ -832,84 +832,9 @@ static int OpenDevice( vlc_object_t *p_this, access_sys_t *p_sys,
                         p_sys->i_width, p_sys->i_height,
                         0, 0, 0, media_types, MAX_MEDIA_TYPES );
 
-    /* Find out if the pin handles MEDIATYPE_Stream, in which case we
-     * won't add a prefered media type as this doesn't seem to work well
-     * -- to investigate. */
-    vlc_bool_t b_stream_type = VLC_FALSE;
-    for( size_t i = 0; i < media_count; i++ )
-    {
-        if( media_types[i].majortype == MEDIATYPE_Stream )
-        {
-            b_stream_type = VLC_TRUE;
-            break;
-        }
-    }
-
     size_t mt_count = 0;
     AM_MEDIA_TYPE *mt = NULL;
 
-    if( !b_stream_type && !b_audio )
-    {
-        // Insert prefered video media type
-        AM_MEDIA_TYPE mtr;
-        VIDEOINFOHEADER vh;
-
-        mtr.majortype            = MEDIATYPE_Video;
-        mtr.subtype              = MEDIASUBTYPE_I420;
-        mtr.bFixedSizeSamples    = TRUE;
-        mtr.bTemporalCompression = FALSE;
-        mtr.pUnk                 = NULL;
-        mtr.formattype           = FORMAT_VideoInfo;
-        mtr.cbFormat             = sizeof(vh);
-        mtr.pbFormat             = (BYTE *)&vh;
-
-        memset(&vh, 0, sizeof(vh));
-
-        vh.bmiHeader.biSize   = sizeof(vh.bmiHeader);
-        vh.bmiHeader.biWidth  = p_sys->i_width > 0 ? p_sys->i_width : 320;
-        vh.bmiHeader.biHeight = p_sys->i_height > 0 ? p_sys->i_height : 240;
-        vh.bmiHeader.biPlanes      = 3;
-        vh.bmiHeader.biBitCount    = 12;
-        vh.bmiHeader.biCompression = VLC_FOURCC('I','4','2','0');
-        vh.bmiHeader.biSizeImage   = vh.bmiHeader.biWidth * 12 *
-            vh.bmiHeader.biHeight / 8;
-        mtr.lSampleSize            = vh.bmiHeader.biSizeImage;
-
-        mt_count = 1;
-        mt = (AM_MEDIA_TYPE *)malloc( sizeof(AM_MEDIA_TYPE)*mt_count );
-        CopyMediaType(mt, &mtr);
-    }
-    else if( !b_stream_type )
-    {
-        // Insert prefered audio media type
-        AM_MEDIA_TYPE mtr;
-        WAVEFORMATEX wf;
-
-        mtr.majortype            = MEDIATYPE_Audio;
-        mtr.subtype              = MEDIASUBTYPE_PCM;
-        mtr.bFixedSizeSamples    = TRUE;
-        mtr.bTemporalCompression = FALSE;
-        mtr.lSampleSize          = 0;
-        mtr.pUnk                 = NULL;
-        mtr.formattype           = FORMAT_WaveFormatEx;
-        mtr.cbFormat             = sizeof(wf);
-        mtr.pbFormat             = (BYTE *)&wf;
-
-        memset(&wf, 0, sizeof(wf));
-
-        wf.wFormatTag = WAVE_FORMAT_PCM;
-        wf.nChannels = 2;
-        wf.nSamplesPerSec = 44100;
-        wf.wBitsPerSample = 16;
-        wf.nBlockAlign = wf.nSamplesPerSec * wf.wBitsPerSample / 8;
-        wf.nAvgBytesPerSec = wf.nSamplesPerSec * wf.nBlockAlign;
-        wf.cbSize = 0;
-
-        mt_count = 1;
-        mt = (AM_MEDIA_TYPE *)malloc( sizeof(AM_MEDIA_TYPE)*mt_count );
-        CopyMediaType(mt, &mtr);
-    }
-
     if( media_count > 0 )
     {
         mt = (AM_MEDIA_TYPE *)realloc( mt, sizeof(AM_MEDIA_TYPE) *