Losing Audio in Video Conversion m2ts mp4

I am using a video importing device and software that creates a "m2ts" file.   I can play the created "m2ts" file perfectly using VLC.
However, neither QuickTime 7 or QuickTime 10.3 will play this file.   When I tried to use MPEG Streamclip I was presented with a pop-up suggesting I need to purchase an additional plug-in, (which I am happy to do). It suggested I go here to purchase. http://www.apple.com/quicktime/mpeg2
I tried that, but was redirected here http://www.apple.com/quicktime/extending/components.html
I have no idea if the software I need is at this redirected website.
The plot thickens.   The importing software has the ability within it to convert video file to a mp4.   I tried that because I have found mp4 to be more compatible.
Unfortunately, I lose all audio (the video is perfect) when I try MPEG Streamclip or VLC. With QuickTime 10.3 I get perfect audio and video. So, I drag the mp4 file into iMovie 06 (aka iMovie HD) and it begins converting into something. When the conversion is complete the audio is gone!
I have dumped many mp4 files into iMovie 06, and never had a problem until now.
Thanks for reading, suggestions appreciated.

I thought I would report my progress. ( I have sound now, BUT !! )
I purchased a video conversion program from the Mac App Store.   It is called “AnyVideo converter HD". It is well reviewed.
So, I dropped in my "m2ts" file. I set the conversion to "Computer MOV 720p HD". "AnyVideo converter HD" converted a 1 minute video in about 15 seconds to a "mov".   The converted file had excellent picture quality and sound, it played perfectly using QuickTime.
Then the trouble started. When I dropped this 60 second clip into iMovie 06 (set for 720p) it's conversion process took 35 minutes ?!?!   The result was flawless! However, a two-hour video conversion would not be complete until about the time Capt. Kirk joins Starfleet.

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Complete name                         \BPAV\CLPR\151_0009_01\151_0009_01.MP4
Format                                   : MPEG-4
Commercial name                    : XDCAM EX 35
Format profile                         : Base Media / Version 2
Codec ID                                : mp42
File size                                : 1.76 GiB
Duration                                 : 7mn 5s
Overall bit rate mode                 : Variable
Overall bit rate                         : 35.6 Mbps
Encoded date                             : UTC 2009-07-19 04:22:10
Tagged date                              : UTC 2009-07-19 04:22:10
Video
ID                                       : 1
Format                                   : MPEG Video
Commercial name                          : XDCAM EX 35
Format version                           : Version 2
Format profile                           : Main@High
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, GOP                     : M=3, N=15
Codec ID                                 : 61
Duration                                 : 7mn 5s
Bit rate mode                            : Variable
Bit rate                                 : 34.0 Mbps
Maximum bit rate                         : 35.0 Mbps
Width                                    : 1 280 pixels
Height                                   : 720 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 fps
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 1.231
Stream size                              : 1.68 GiB (96%)
Language                                 : English
Encoded date                             : UTC 2009-07-19 04:22:10
Tagged date                              : UTC 2009-07-19 04:22:10
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Audio
ID                                       : 2
Format                                   : PCM
Format settings, Endianness              : Big
Format settings, Sign                    : Signed
Codec ID                                 : twos
Duration                                 : 7mn 5s
Bit rate mode                            : Constant
Bit rate                                 : 1 536 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 KHz
Bit depth                                : 16 bits
Stream size                              : 77.9 MiB (4%)
Language                                 : English
Encoded date                             : UTC 2009-07-19 04:22:10
Tagged date                              : UTC 2009-07-19 04:22:10

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Last edited by ninian (2010-11-16 23:28:02)

Aha! I think I've cracked it, but using ffmpeg instead, with options prompted by this blog post:
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Is there a way to shorten iMovie video conversion ?

I am starting with a "m2ts" video file.
I purchased a video conversion program from the Mac App Store.   It is called “AnyVideo converter HD". It is well reviewed.
So, I dropped in my "m2ts" file. I set the conversion to "Computer MOV 720p HD". "AnyVideo converter HD" converted a 1 minute video in about 15 seconds to a "mov".   The converted file had excellent picture quality and sound, it played perfectly using QuickTime.
When I dropped this 60 second clip into iMovie 06 (set for 720p) it's conversion process took 35 minutes ?!?!   The result was flawless! However, a two-hour video conversion would not be complete until about the time Capt. Kirk joins Starfleet.
How can I speed this up ?

baltwo - thank you for the expert advice.
I did as you instructed and the situation is better but I don't believe it's solved.
I still get 3 versions of Photoshop when I right click on a PSD. I also get Dashcode and Textwrangler - which are the oddest associations. All together I get 25 apps responding to "Open With" on a PSD. And this is an improvement.
Do you think I would get even better results if I ran the same command again?
Thanks again.
JL

Losing Audio in Video Conversion m2ts mp4

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