DOES NOT REQUIRE X11
Qt4 build also available: http://prdownload.berlios.de/avidemux/avidemux_2.4.3_QT4_universal.dmg

2.4.3

Improved support for MP4 files including support for 64-bit filesa
Support for Y800 codec
libavcodec is now the default MPEG-2 decoder (instead of mpeg2dec)
Fixed memory leak when indexing DVR-MS files
Fixed calculation of width and height for High Profile H.264 video in TS files
Fixed dropping of frames using x264 2-pass encoding (regression introduced in 2.4.2)
Restored missing code pages to the Subtitler filter (regression introduced in 2.4.2)
Fixed crashing on MS Windows when opening multiple instances of Avidemux (regression introduced in 2.4.2)
Remove unneeded delay when using x264 with mkv or mp4
2.4.2

Improved input and output of audio streams in MKV files
Support for MJPEG-A in MOV/MP4 files
Fixed saving header information of AVI files with PCM/LPCM audio
Fixed opening FLV files that don't contain audio
Fixed corruption when decoding MP4 files
Fixed crashing when using MPEG-4 ASP (lavc) and two pass average bitrate mode
Flush the x264 encoder upon completion so the last few frames aren't dropped
Fixed incorrect colour conversion of 24/32 bit BMP and DIB files
Re-enabled AMR-NB decoder (regression introduced in 2.4.0)
Support for additional VP6 fourCCs
Xvid custom matrices are now activated correctly
Fixed caching issue with Qt4 interface which would corrupt translated strings
Fixed zooming when using SDL (regression introduced in 2.4.1)
Windows are now centred correctly on multi-monitor setups
Use alternate button ordering for GTK+ interface when GNOME HIG isn't appropriate, e.g. MS Windows and KDE
Various additions to the Qt4 interface including a new calculator tool, drag and drop support, improved joblist support and an about window
SRT subtitle support for Arabic, Baltic, Greek, Hebrew and Turkish
Fixed iPod profile where audio encoding options weren't always set correctly
Fixed Film to PAL audio filter so frames are removed and added correctly
Batch importing of image files is no longer restricted by the file handle limit set by the C runtime
Video filter for outputting the frame number
PulseAudio support (Linux only)
GCC 4.3 support
Updated the following translations: Czech, French, German, Greek, Italian, Spanish
Fixed drag and drop support on MS Windows
Improved Unicode support for filenames on MS Windows
Prevent source files from being overwritten accidentally by the user on MS Windows
MS Windows logging and settings are now stored under the Application Data folder instead of the User Profile folder
Native file dialogs are now used for the Qt4 interface on Mac
Various minor fixes and enhancements

2.4.1 is a bugfix release

• Support for x264’s new Hadamard Exhaustive Search method of motion estimation

• Decoder for Windows Media Video 9 Advanced Profile (WVC1)

• Re-enabled H.263 decoder (it was missing from the 2.4 release)

• Fixed loss of audio when saving large OpenDML AVI files

• Fixed various colour conversion issues with RGB codecs including BMP, Huffyuv, JPEG and PNG

• Updates to the following translations: Catalan, French, German, Italian, Russian and Spanish

• Win32 logging is now stored in an Avidemux folder under the user's profile. This allows Avidemux to operate under a non-administrator account.

• Win32 CLI version nows outputs to console

• New Quartz version for Mac

• Better SDL support for Mac Quartz and Qt4 versions (SDL windows are now embedded and acceleration is enabled for Qt4)

• Various video decoding fixes for PowerPC-based Macs

• Fixed freezing when opening files on Mac

• Fix corruption when encoding from a mp4/mov/3gp file.

Most of the work is once again from Gruntster.

no longer requires x11 to run. there are two os x standalone versions of avidemux now. one's interface is built with the qt toolkit (you can get that from the download link) and an alternate one is built with gtk, which can be downloaded from here;

http://downloads.sourceforge.net/avidemux/avidemux_2.4_gtk_preview3.1_intel.dmg