Window size changes incorrectly when switching between streamed content

Switching between streaming content with different video resolution causes a change of the window size. In most cases the window is sized to a incorrect size not equal to the stream resolution. Example streams have resolutions of 720p, 1080i or 576p.

Example .xspf with stream sources:

?xml version="1.0" encoding="ISO-8859-1"?>
<playlist version="0" xmlns="http://xspf.org/ns/0/"><title>VDR</title><trackList>
<track><location>http://wlan-010:3000/TS/1</location><title>1 - SF 1 HD</title></track>
<track><location>http://wlan-010:3000/TS/2</location><title>2 - SF zwei HD</title></track>
<track><location>http://wlan-010:3000/TS/3</location><title>3 - SF info</title></track>
<track><location>http://wlan-010:3000/TS/4</location><title>4 - Das Erste HD</title></track>
<track><location>http://wlan-010:3000/TS/5</location><title>5 - ZDF HD</title></track>
<track><location>http://wlan-010:3000/TS/6</location><title>6 - ORF1 HD</title></track>
<track><location>http://wlan-010:3000/TS/7</location><title>7 - ORF2 HD</title></track>
<track><location>http://wlan-010:3000/TS/8</location><title>8 - arte HD</title></track>
<track><location>http://wlan-010:3000/TS/9</location><title>9 - 3sat HD</title></track>
<track><location>http://wlan-010:3000/TS/10</location><title>10 - BR Süd HD</title></track>
<track><location>http://wlan-010:3000/TS/11</location><title>11 - BR-alpha</title></track>
<track><location>http://wlan-010:3000/TS/12</location><title>12 - SWR BW HD</title></track>
<track><location>http://wlan-010:3000/TS/13</location><title>13 - WDR HD Köln</title></track>
<track><location>http://wlan-010:3000/TS/14</location><title>14 - MDR Sachsen</title></track>
<track><location>http://wlan-010:3000/TS/15</location><title>15 - NDR FS HH HD</title></track>
<track><location>http://wlan-010:3000/TS/16</location><title>16 - hr-fernsehen</title></track>
<track><location>http://wlan-010:3000/TS/17</location><title>17 - rbb Berlin</title></track>
<track><location>http://wlan-010:3000/TS/18</location><title>18 - zdf_neo HD</title></track>
<track><location>http://wlan-010:3000/TS/19</location><title>19 - zdf.kultur HD</title></track>