No audio track for my MP4 files

Hi there,

I'm using Samsung SC-MX20, PC-BSD 7.1, kdenlive 7.5. When I add the MP4 files to kdenlive, it does not include the audio. Other file formats do not have this problem (video and audio are both there). Playing one of the mp4 files in mplayer (from the command line) works (has sound) and also produces the following text output:

[xxxx@pcbsd /usr/home/xxxx/Videos/Raw]$ mplayer SDV_0017.MP4
MPlayer 1.0rc2-4.2.1 (C) 2000-2007 MPlayer Team
CPU: AMD Sempron(tm) Processor 3100+ (Family: 15, Model: 28, Stepping: 0)
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.

Playing SDV_0017.MP4.
ISO: Unknown File Type Major Brand: avc1
Quicktime/MOV file format detected.
[mov] Video stream found, -vid 0
[mov] Audio stream found, -aid 1
VIDEO: [avc1] 720x480 24bpp 29.970 fps 0.0 kbps ( 0.0 kbyte/s)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
==========================================================================
==========================================================================
Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding)
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio) decoder)
==========================================================================
AO: [oss] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 720 x 480 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 720x480 => 720x480 Planar YV12

Is there some way to get kdenlive to recognize the audio track?

Thanks!

Tim