No audio when playing QuickTime or MP4 files

[SD65535]

I have a QuickTime file, which I also converted to an MP4 file using MP4Box.
When I try to play either file using ffdshow, I get video, but no audio.
When I play them in VLC I get video and audio.

DirectShow detailed rendering :
0> MyRenderFile : <filename>
0> Creation of GraphBuilder : OK
0> Creation of FilterMapper2 : OK
0> Adding graph to ROT : OK
70> Creation of source filter : OK
70> # Rendering output pin <filename>(Video)
70> Filters matching mediatype : ffdshow Video Decoder, DirectVobSub (auto-loading version), Video Renderer
70> Trying connection to ffdshow Video Decoder :
110> OK, connected to (In)ffdshow Video Decoder
110> # Rendering output pin <filename>(Video) -> ffdshow Video Decoder(Out)
120> Filters matching mediatype : ffdshow Video Decoder, DirectVobSub (auto-loading version), Video Renderer
120> Trying connection to DirectVobSub (auto-loading version) :
180> Failed connecting pin to DirectVobSub (auto-loading version), removing it now.
180> Trying connection to Video Renderer :
280> OK, connected to (VMR Input0)Video Renderer
280> Completed path : <filename>(Video) -> ffdshow Video Decoder(Out) -> Video Renderer
280> MyRenderFile finished : OK

Version: ffdshow tryouts Win32 4500

[clsid]

The splitter is at fault. It does not provide an audio pin.

Install LAV Filters.