Buenas! Después de ver el de @pozimi, me gustó tanto el programa para ver películas que quise configurarlo para ver la TDT en vivo.
No hay links de descargas, pero es software muy facil de encontrar y gratuito.
Lo necesario es: el xbmc instalado, una tarjeta sintonizadora de tdt y una antena. Mejor dicho, es necesario que la tdt ya esté funcionando en tu PC. Lo que sigue, sirve para integrar todo en un mismo programa: el XBMC.
Después de luchar un rato logré configurarlo. El tema es el siguiente: el XBMC no detecta de forma nativa las tarjetas sintonizadoras. Primero hay que instalar desde el sistema operativo un Servidor de PVR que configure la tarjeta de tv. Luego, desde el XBMC se instala el Add-On Cliente PVR (el Frontend) que se conectará con el Servidor PVR (el Backend).
Luego de hacer varias pruebas, logré instalar un Servidor que funciona con la norma de TDT Argentina (ISDB-T): Ese programa es el NextPVR. Primero se instala, y luego se scanea las frecuencias de canales de tu zona. Para que esto último funcione, es necesario seleccionar la zona: Taiwan. Sino, pueden copiar el código que dejo acá abajo que tiene todas las frecuencias de Buenos Aires.
Luego de hacer andar el NextPVR, es necesario entrar al XBMC. Activar la Tv Online, e instalar el Add-ON Cliente NextPVR..
Con todo esto, ya debería funcionar.

Como dije, dejo el código con las frecuencias de los canales de Buenos Aires, Argentina.
1) Lo copian
2) Abren el bloc de notas y lo pegan
3) Guardan el archivo con extensión xml
4) Abren el NextPVR y settings-Device-Import Channels: importan el archivo xml.
5) Desde el NextPVR deberian poder sintonizar los canales sin problemas.
6) Desde el XBMC ya pueden ver los canales con el Add-On Cliente de NextPVR.
[color=#000000]
<Channels Type="DVB-T">
<Channel>
<Name>Encuentro</Name>
<Number>1</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>521000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59168</service_id>
<tsid>1849</tsid>
<onid>1849</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59168:1849:1849 Encuentro</readable_source>
<mapping>59168:1849:1849</mapping>
</epg>
</Channel>
<Channel>
<Name>Paka Paka</Name>
<Number>2</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>521000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59169</service_id>
<tsid>1849</tsid>
<onid>1849</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59169:1849:1849 Paka Paka</readable_source>
<mapping>59169:1849:1849</mapping>
</epg>
</Channel>
<Channel>
<Name>TaTeTi</Name>
<Number>3</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>521000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59170</service_id>
<tsid>1849</tsid>
<onid>1849</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59170:1849:1849 TaTeTi</readable_source>
<mapping>59170:1849:1849</mapping>
</epg>
</Channel>
<Channel>
<Name>Incaa Tv</Name>
<Number>4</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>521000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59171</service_id>
<tsid>1849</tsid>
<onid>1849</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59171:1849:1849 Incaa Tv</readable_source>
<mapping>59171:1849:1849</mapping>
</epg>
</Channel>
<Channel>
<Name>Tecnopolis</Name>
<Number>5</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>521000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59172</service_id>
<tsid>1849</tsid>
<onid>1849</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59172:1849:1849 Tecnopolis</readable_source>
<mapping>59172:1849:1849</mapping>
</epg>
</Channel>
<Channel>
<Name>Unknown 527000.59201</Name>
<Number>6</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>527000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59201</service_id>
<tsid>1850</tsid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59201:1850:0 Unknown 527000.59201</readable_source>
<mapping>59201:1850:0</mapping>
</epg>
</Channel>
<Channel>
<Name>Unknown 527000.59202</Name>
<Number>7</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>527000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59202</service_id>
<tsid>1850</tsid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59202:1850:0 Unknown 527000.59202</readable_source>
<mapping>59202:1850:0</mapping>
</epg>
</Channel>
<Channel>
<Name>DEPORTV HD</Name>
<Number>8</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>533000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59232</service_id>
<tsid>1851</tsid>
<onid>1851</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59232:1851:1851 DEPORTV HD</readable_source>
<mapping>59232:1851:1851</mapping>
</epg>
</Channel>
<Channel>
<Name>Vivra</Name>
<Number>9</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>533000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59233</service_id>
<tsid>1851</tsid>
<onid>1851</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59233:1851:1851 Vivra</readable_source>
<mapping>59233:1851:1851</mapping>
</epg>
</Channel>
<Channel>
<Name>Arpeggio</Name>
<Number>10</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>533000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59234</service_id>
<tsid>1851</tsid>
<onid>1851</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59234:1851:1851 Arpeggio</readable_source>
<mapping>59234:1851:1851</mapping>
</epg>
</Channel>
<Channel>
<Name>Viajar</Name>
<Number>11</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>533000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59235</service_id>
<tsid>1851</tsid>
<onid>1851</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59235:1851:1851 Viajar</readable_source>
<mapping>59235:1851:1851</mapping>
</epg>
</Channel>
<Channel>
<Name>CN23</Name>
<Number>12</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>539000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59264</service_id>
<tsid>1852</tsid>
<onid>1852</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59264:1852:1852 CN23</readable_source>
<mapping>59264:1852:1852</mapping>
</epg>
</Channel>
<Channel>
<Name>C5N</Name>
<Number>13</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>539000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59265</service_id>
<tsid>1852</tsid>
<onid>1852</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59265:1852:1852 C5N</readable_source>
<mapping>59265:1852:1852</mapping>
</epg>
</Channel>
<Channel>
<Name>TeleSur</Name>
<Number>14</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>539000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59266</service_id>
<tsid>1852</tsid>
<onid>1852</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59266:1852:1852 TeleSur</readable_source>
<mapping>59266:1852:1852</mapping>
</epg>
</Channel>
<Channel>
<Name>G360</Name>
<Number>15</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>539000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59267</service_id>
<tsid>1852</tsid>
<onid>1852</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59267:1852:1852 G360</readable_source>
<mapping>59267:1852:1852</mapping>
</epg>
</Channel>
<Channel>
<Name>Construir</Name>
<Number>16</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>539000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59268</service_id>
<tsid>1852</tsid>
<onid>1852</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59268:1852:1852 Construir</readable_source>
<mapping>59268:1852:1852</mapping>
</epg>
</Channel>
<Channel>
<Name>C5N HD</Name>
<Number>17</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>551000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>23456</service_id>
<tsid>733</tsid>
<onid>733</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>23456:733:733 C5N HD</readable_source>
<mapping>23456:733:733</mapping>
</epg>
</Channel>
<Channel>
<Name>2702 HD</Name>
<Number>18</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>551000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>23457</service_id>
<tsid>733</tsid>
<onid>733</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>23457:733:733 2702 HD</readable_source>
<mapping>23457:733:733</mapping>
</epg>
</Channel>
<Channel>
<Name>Canal 13 SD</Name>
<Number>19</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>587000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59520</service_id>
<tsid>1860</tsid>
<onid>1860</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59520:1860:1860 Canal 13 SD</readable_source>
<mapping>59520:1860:1860</mapping>
</epg>
</Channel>
<Channel>
<Name>Prueba Artear 2</Name>
<Number>20</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>587000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>59521</service_id>
<tsid>1860</tsid>
<onid>1860</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>59521:1860:1860 Prueba Artear 2</readable_source>
<mapping>59521:1860:1860</mapping>
</epg>
</Channel>
<Channel>
<Name>Telefe HD PRUEBA</Name>
<Number>21</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>593000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57408</service_id>
<tsid>65282</tsid>
<onid>65282</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57408:65282:65282 Telefe HD PRUEBA</readable_source>
<mapping>57408:65282:65282</mapping>
</epg>
</Channel>
<Channel>
<Name>Telefe Movil</Name>
<Number>22</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>593000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57432</service_id>
<tsid>65282</tsid>
<onid>65282</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57432:65282:65282 Telefe Movil</readable_source>
<mapping>57432:65282:65282</mapping>
</epg>
</Channel>
<Channel>
<Name>Telefe SD</Name>
<Number>23</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>593000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57409</service_id>
<tsid>65282</tsid>
<onid>65282</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57409:65282:65282 Telefe SD</readable_source>
<mapping>57409:65282:65282</mapping>
</epg>
</Channel>
<Channel>
<Name>ACUA </Name>
<Number>24</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>593000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57410</service_id>
<tsid>65282</tsid>
<onid>65282</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57410:65282:65282 ACUA </readable_source>
<mapping>57410:65282:65282</mapping>
</epg>
</Channel>
<Channel>
<Name>ACUA</Name>
<Number>25</Number>
<ServiceType>22</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>599000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>3522</service_id>
<tsid>110</tsid>
<onid>110</onid>
<service_type>22</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>3522:110:110 ACUA</readable_source>
<mapping>3522:110:110</mapping>
</epg>
</Channel>
<Channel>
<Name>Canal 9 SD</Name>
<Number>26</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>599000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>3521</service_id>
<tsid>110</tsid>
<onid>110</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>3521:110:110 Canal 9 SD</readable_source>
<mapping>3521:110:110</mapping>
</epg>
</Channel>
<Channel>
<Name>Canal 9 HD</Name>
<Number>27</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>599000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>3520</service_id>
<tsid>110</tsid>
<onid>110</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>3520:110:110 Canal 9 HD</readable_source>
<mapping>3520:110:110</mapping>
</epg>
</Channel>
<Channel>
<Name>America HD Prueba</Name>
<Number>28</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>605000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57440</service_id>
<tsid>65283</tsid>
<onid>65283</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57440:65283:65283 America HD Prueba</readable_source>
<mapping>57440:65283:65283</mapping>
</epg>
</Channel>
<Channel>
<Name>America SD</Name>
<Number>29</Number>
<ServiceType>1</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>605000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57441</service_id>
<tsid>65283</tsid>
<onid>65283</onid>
<service_type>1</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57441:65283:65283 America SD</readable_source>
<mapping>57441:65283:65283</mapping>
</epg>
</Channel>
<Channel>
<Name>A24 Prueba</Name>
<Number>30</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>605000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57442</service_id>
<tsid>65283</tsid>
<onid>65283</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57442:65283:65283 A24 Prueba</readable_source>
<mapping>57442:65283:65283</mapping>
</epg>
</Channel>
<Channel>
<Name>America 1 seg</Name>
<Number>31</Number>
<ServiceType>25</ServiceType>
<tuning>
<type>DVB-T</type>
<locator>
<frequency>605000</frequency>
<bandwidth>6</bandwidth>
</locator>
<service_id>57464</service_id>
<tsid>65283</tsid>
<onid>65283</onid>
<service_type>25</service_type>
</tuning>
<EPGSource>DVB/ATSC EPG</EPGSource>
<epg>
<source>DVB/ATSC EPG</source>
<capture_source>20</capture_source>
<readable_source>57464:65283:65283 America 1 seg</readable_source>
<mapping>57464:65283:65283</mapping>
</epg>
</Channel>
</Channels>
[/color]
Les dejo una captura de pantalla sacada recién:

Eso es todo, saludos!