Why does Quicktime 7 not open in Windows 7?

When I try to open the Quicktime 7 player an icon appears in the tray, and when I click on it nothing happens. I am using Windows 7 Professional 64 bit- service pack 1. QT7 worked before. It simply stopped opening. I have tried uninstalling and reinstalling to no avail. If someone has an answer for this problem I would appreciate knowing how I could fix it. Thanks.

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I can create an mp4 file (recording) from Belkin's @TV app but that file will not play correctly in Quicktime (or RealPlayer or iMovie, etc.). While the video playback seems fine, the audio plays a couple of seconds, at "chipmonk" speed, and then there is no sound out. However, if I move the playhead to any random place in the recording I can then hear another couple of seconds of audio, as before ("chipmonk" speed), and then silence. The VLC player will, however, play the file correctly.
So, seeing that the file itself was not bad, I decided to try Handbrake to re-encode the recording. And, to my surprise, Handbrake was able to handle the file correctly and produce an mp4 file that Quicktime (and the others) can play.
I don't know enough about these mp4 files to grasp what is wrong with the original Belkin output. The Quicktime inspector reports that the Format is
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Any ideas? (Is there additional data I can look at about this file?)
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Jon Walker wrote:
Use a dedicated utility like MediaInfo to screen more information about the file and how each track is encoded.
Another user in the Belkin forum suggested that I look at the recording's header info, and pointed me to AtomicParsley, which I have now run (using some basic terminal commands).
This is what it reports for the initial, Belkin-app produced file:
Atom ftyp @ 0 of size: 24, ends @ 24
Atom mdat @ 24 of size: 195643428, ends @ 195643452
Atom moov @ 195643452 of size: 772515, ends @ 196415967
     Atom mvhd @ 195643460 of size: 108, ends @ 195643568
     Atom iods @ 195643568 of size: 33, ends @ 195643601
     Atom trak @ 195643601 of size: 674653, ends @ 196318254
         Atom tkhd @ 195643609 of size: 92, ends @ 195643701
         Atom mdia @ 195643701 of size: 674553, ends @ 196318254
             Atom mdhd @ 195643709 of size: 32, ends @ 195643741
             Atom hdlr @ 195643741 of size: 33, ends @ 195643774
             Atom minf @ 195643774 of size: 674480, ends @ 196318254
                 Atom vmhd @ 195643782 of size: 20, ends @ 195643802
                 Atom dinf @ 195643802 of size: 36, ends @ 195643838
                     Atom dref @ 195643810 of size: 28, ends @ 195643838
                 Atom stbl @ 195643838 of size: 674416, ends @ 196318254
                     Atom stsd @ 195643846 of size: 140, ends @ 195643986
                         Atom avc1 @ 195643862 of size: 124, ends @ 195643986
                             Atom avcC @ 195643948 of size: 38, ends @ 195643986
                     Atom stts @ 195643986 of size: 403840, ends @ 196047826
                     Atom stss @ 196047826 of size: 8476, ends @ 196056302
                     Atom stsc @ 196056302 of size: 28, ends @ 196056330
                     Atom stsz @ 196056330 of size: 253724, ends @ 196310054
                     Atom stco @ 196310054 of size: 8200, ends @ 196318254
     Atom trak @ 196318254 of size: 97713, ends @ 196415967
         Atom tkhd @ 196318262 of size: 92, ends @ 196318354
         Atom edts @ 196318354 of size: 48, ends @ 196318402
             Atom elst @ 196318362 of size: 40, ends @ 196318402
         Atom mdia @ 196318402 of size: 97565, ends @ 196415967
             Atom mdhd @ 196318410 of size: 32, ends @ 196318442
             Atom hdlr @ 196318442 of size: 33, ends @ 196318475
             Atom minf @ 196318475 of size: 97492, ends @ 196415967
                 Atom smhd @ 196318483 of size: 16, ends @ 196318499
                 Atom dinf @ 196318499 of size: 36, ends @ 196318535
                     Atom dref @ 196318507 of size: 28, ends @ 196318535
                 Atom stbl @ 196318535 of size: 97432, ends @ 196415967
                     Atom stsd @ 196318543 of size: 92, ends @ 196318635
                         Atom mp4a @ 196318559 of size: 76, ends @ 196318635
                             Atom esds @ 196318595 of size: 40, ends @ 196318635
                     Atom stts @ 196318635 of size: 1088, ends @ 196319723
                     Atom stss @ 196319723 of size: 16, ends @ 196319739
                     Atom stsc @ 196319739 of size: 532, ends @ 196320271
                     Atom stsz @ 196320271 of size: 88328, ends @ 196408599
                     Atom stco @ 196408599 of size: 7368, ends @ 196415967
Total size: 196415967 bytes; 42 atoms total. AtomicParsley version: 0.9.0 (utf8)
Media data: 195643428 bytes; 772539 bytes all other atoms (0.393% atom overhead).
Total free atom space: 0 bytes; 0.000% waste.
Movie duration: 2116.513 seconds (35:16.51) - 739.49* kbp/sec bitrate (*=approximate)
Low-level details. Total tracks: 2
Trk Type Handler                    Kind Lang Bytes
1    vide [none listed]              avc1 eng   178711864
     675.58* kbp/s 2116.243 sec AVC Main Profile, Level 3.1 352x240 (330 macroblocks)
2    soun [none listed]              mp4a eng   16931556
     64.00* kbp/s 2116.513 sec MPEG-4 AAC Low Complexity Profile    channels: [2]
Jon Walker wrote:
In most cases, users want answers but are unable or unwilling to provide the encoding information to explain most problems, it is usually simpler to ask users to post a sample file for examination on my own computer.
I have the equivalent for the recording's Handbrake output. I did a file compare but there were enough differences (and I'm not a technical person) so I could not spot which of the differences mattered. For example, I thought that the fact that there is "none listed" for the sound handler looked like an obvious clue until I saw that same thing in the Handbrake output.
Here is the Handbrake data:
Atom ftyp @ 0 of size: 28, ends @ 28
Atom free @ 28 of size: 132, ends @ 160
Atom mdat @ 160 of size: 100944363, ends @ 100944523
Atom moov @ 100944523 of size: 1606698, ends @ 102551221
     Atom mvhd @ 100944531 of size: 108, ends @ 100944639
     Atom iods @ 100944639 of size: 24, ends @ 100944663
     Atom trak @ 100944663 of size: 1288497, ends @ 102233160
         Atom tkhd @ 100944671 of size: 92, ends @ 100944763
         Atom mdia @ 100944763 of size: 1288361, ends @ 102233124
             Atom mdhd @ 100944771 of size: 32, ends @ 100944803
             Atom hdlr @ 100944803 of size: 33, ends @ 100944836
             Atom minf @ 100944836 of size: 1288288, ends @ 102233124
                 Atom vmhd @ 100944844 of size: 20, ends @ 100944864
                 Atom dinf @ 100944864 of size: 36, ends @ 100944900
                     Atom dref @ 100944872 of size: 28, ends @ 100944900
                 Atom stbl @ 100944900 of size: 1288224, ends @ 102233124
                     Atom stsd @ 100944908 of size: 186, ends @ 100945094
                         Atom avc1 @ 100944924 of size: 170, ends @ 100945094
                             Atom avcC @ 100945010 of size: 50, ends @ 100945060
                             Atom colr @ 100945060 of size: 18, ends @ 10094507 ~
                     Atom stts @ 100945094 of size: 403832, ends @ 101348926
                     Atom stsz @ 101348926 of size: 253724, ends @ 101602650
                     Atom stsc @ 101602650 of size: 24436, ends @ 101627086
                     Atom stco @ 101627086 of size: 56712, ends @ 101683798
                     Atom ctts @ 101683798 of size: 484536, ends @ 102168334
                     Atom stss @ 102168334 of size: 1352, ends @ 102169686
                     Atom sdtp @ 102169686 of size: 63438, ends @ 102233124
         Atom edts @ 102233124 of size: 36, ends @ 102233160
             Atom elst @ 102233132 of size: 28, ends @ 102233160
     Atom trak @ 102233160 of size: 317950, ends @ 102551110
         Atom tkhd @ 102233168 of size: 92, ends @ 102233260
         Atom mdia @ 102233260 of size: 317828, ends @ 102551088
             Atom mdhd @ 102233268 of size: 32, ends @ 102233300
             Atom hdlr @ 102233300 of size: 33, ends @ 102233333
             Atom minf @ 102233333 of size: 317755, ends @ 102551088
                 Atom smhd @ 102233341 of size: 16, ends @ 102233357
                 Atom dinf @ 102233357 of size: 36, ends @ 102233393
                     Atom dref @ 102233365 of size: 28, ends @ 102233393
                 Atom stbl @ 102233393 of size: 317695, ends @ 102551088
                     Atom stsd @ 102233401 of size: 103, ends @ 102233504
                         Atom mp4a @ 102233417 of size: 87, ends @ 102233504
                             Atom esds @ 102233453 of size: 51, ends @ 102233504
                     Atom stts @ 102233504 of size: 24, ends @ 102233528
                     Atom stsz @ 102233528 of size: 264600, ends @ 102498128
                     Atom stsc @ 102498128 of size: 28, ends @ 102498156
                     Atom stco @ 102498156 of size: 52932, ends @ 102551088
         Atom udta @ 102551088 of size: 22, ends @ 102551110
             Atom name @ 102551096 of size: 14, ends @ 102551110
     Atom udta @ 102551110 of size: 111, ends @ 102551221
         Atom meta @ 102551118 of size: 103, ends @ 102551221
             Atom hdlr @ 102551130 of size: 33, ends @ 102551163
             Atom ilst @ 102551163 of size: 58, ends @ 102551221
                 Atom ©too @ 102551171 of size: 50, ends @ 102551221
                     Atom data @ 102551179 of size: 42, ends @ 102551221
Atom free @ 102551221 of size: 132, ends @ 102551353
~ denotes an unknown atom
Total size: 102551353 bytes; 54 atoms total. AtomicParsley version: 0.9.0 (utf8)
Media data: 100944363 bytes; 1606990 bytes all other atoms (1.567% atom overhead).
Total free atom space: 264 bytes; 0.000% waste.
Movie duration: 2116.640 seconds (35:16.64) - 381.53* kbp/sec bitrate (*=approximate)
Low-level details. Total tracks: 2
Trk Type Handler                    Kind Lang Bytes
1    vide [none listed]              avc1 und   65533744
     247.74* kbp/s 2116.243 sec AVC Main Profile, Level 4 352x240 (330 macroblocks)
2    soun [none listed]              mp4a eng   35410611
     133.84 kbp/s 2116.640 sec MPEG-4 AAC Low Complexity Profile    channels: [2]

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