MediaCoder (64-bit) is an universal audio or video batch converter, which puts together lots of excellent audio or video codec's and tools from the open source community into an all-in-one solution, capable of coding among different audio or video formats. It contains many extra features and expandable architecture. MediaCoder is more than a GUI of a bunch of command line tools.
Video and audio are converted quickly, accurately and at high quality.
Not for beginners.
I've tried most of the well known video converters and none of them would accurately reproduce all six channels from a Dolby 5.1 DVD.
Some channels would be missing or extra channels would be added that didn't exist on the DVD! Also some converters produced poor video and/or audio output despite the quality settings and sometimes audio would be very distorted.
Mediacoder is the ONLY software I have tried that not only converts a Doby 5.1 DVD correctly but also produces high video and audio quality.
1) Excellent quality output with respect to original.
2) Works relatively fast.
3) Wide range of input and output file types.
4) Ability to control kbps bitrate (file size), pixel sizes, aspect ratio of output.
4) Ability to crop files.
5) Ability to join files of same type.
6) Ability to boost audio.
7) Ability to offset audio in output file for input files out of sync.
8) Ability to control brightness, contrast, saturation and much more.
9) Minimal nag screens (I've seen 2 while doing about 30 conversions).
1. Not user friendly.
2. No manual.
I was looking for freeware that would quickly convert flv, avi, etc. files to mp4 for use on my cell phone. I wanted output files whose video and audio quality were as good as the input files. Some of my files have audio out of sync. Some are old 1960's-70's rock videos that are dark or have low contrast or washed-out color. Some are larger in file size than I need for my 5" screen.
MediaCoder answers all those needs well.
As for speed, for me with a 2 GHz quad-core processor, MediaCoder 64K has converted 1280 x 720 video at a 1000 kbps bitrate at about 2/3 the speed of the movie's normal playing time - so a 60 minute movie takes 90 minutes to convert and that's while I'm doing other things on the computer.
To adjust contrast, saturation, and brightness, click on the "Settings" tab at the top, then click on the "Video..." listing on the bottom to access those controls.
Bitrate and audio boost/offset controls are on "Video" and "Sound" tabs on the lower left.