MP4 conversion is shortening my clip

[yebidies]

Hi,

I'm converting from an .mov to an .mp4 and every time I try my clip gets shortened. The video is still there in good quality, however, all the black before and after the video has been taken out. Please help.

I've used:
Any Video Converter
4Videosoft AVC Converter for Mac
Miro Video Converter
WinXD Video Converter

[Baldrick]

Try "remux" with avidemux, open mov, under video and choose copy, under format choose mp4, save. No video quality loss.

If it wont help then post the details from the mov. Use MediaInfo.

[yebidies]

thank you for the reply. it did the same thing again. below is the result of the mediainfo. I've realized that the conversion replaces the black space with the first image of the video (about 13 seconds of black), the actual length isn't shorter. below the .mov are the results of the media info for the converted file through avidemux

.MOV
Format :MPEG-4
Format profile :QuickTime
Codec ID :qt
File size :8.59 GiB
Duration :6mn 2s
Overall bit rate mode :Variable
Overall bit rate :204 Mbps
Encoded date :UTC 2011-10-30 13:49:01
Tagged date :UTC 2011-10-30 14:52:46
Writing library :Apple QuickTime
©TIM :00;00;00;00
©TSC :2997
©TSZ :100
Video ID :1
Format :AVC
Format/Info :Advanced Video Codec
Format profile :Main@L5.1
Format settings, CABAC :No
Format settings, ReFrames :2 frames
Format settings, GOP :N=1
Codec ID :avc1
Codec ID/Info :Advanced Video Coding
Duration :6mn 2s
Bit rate mode :Variable
Bit rate :202 Mbps
Width :1 920 pixels
Height :1 080 pixels
Display aspect ratio :16:9
Frame rate mode :Variable
Frame rate :28.819 fps
Minimum frame rate :0.072 fps
Maximum frame rate :29.970 fps
Color space :YUV
Chroma subsampling :4:2:0
Bit depth :8 bits
Scan type :Progressive
Bits/(Pixel*Frame) :3.384
Stream size :8.53 GiB (99%)
Language :English
Encoded date :UTC 2011-10-30 13:49:01
Tagged date :UTC 2011-10-30 14:52:46
Color primaries :BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics :BT.709-5, BT.1361
Matrix coefficients :BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

avidemux conversion
Format :MPEG-4
Format profile :Base Media
Codec ID :isom
File size :8.53 GiB
Duration :6mn 2s
Overall bit rate mode :Variable
Overall bit rate :202 Mbps
Movie name :avidemuxtrial
Writing application :Lavf52.78.3
VideoID :1
Format :AVC
Format/Info :Advanced Video Codec
Format profile :Main@L5.1
Format settings, CABAC :No
Format settings, ReFrames :2 frames
Format settings, GOP :N=1
Codec ID :avc1
Codec ID/Info :Advanced Video Coding
Duration :6mn 2s
Bit rate mode :Variable
Bit rate :202 Mbps
Width :1 920 pixels
Height :1 080 pixels
Display aspect ratio :16:9
Frame rate mode :Constant
Frame rate :28.819 fps
Color space :YUV
Chroma subsampling :4:2:0
Bit depth :8 bits
Scan type :Progressive
Bits/(Pixel*Frame) :3.384
Stream size :8.53 GiB (100%)
Color primaries :BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics :BT.709-5, BT.1361
Matrix coefficients :BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177