Good video convertor for mp4 to avi.,which should convert with out affecting the quality, and size?

Nidesoft total video conver is a very good video software http://www.nidesoft.com/total-video-converter.html

try the Formatfactory, it is a free video/audio converter, works perfectly between any format. type Formatfactory in Google and pick the first one then download it.

Different video encoder have different compression rate. Video bitrate has influence on video size and quality within the same video encoder, the lower bitrate, the higher the compression and the lower the quality. Compress and convert any video files between any different formats, you can try RZ Video Converter, it can convert any videos and audios from one format to other format, it can compress videos, it can customize the target videos bitrate, video resolution, resize mode(stretch, or keep ratio), etc. You can compress/convert your mp4 or avi videos with RZ Video Converter, more info about RZ Video Converter, you can goto rzvideoconverter.com. Hope it can help you.

Try this video converter: http://www.video-dvd-ripper.com/video-converter/ It supports the mutual conversion between almost all video/audio formats, and HD videos. It is easy to operate. Just few clicks are OK. The conversion will be finished in short while and with lossless quality. Just have a try and I hope it can help you.

Try this video converter. It is easy and powerful with High image quality.You can custome the size by youself. This software allow you to preview the original or video customized, and compare them with each other. Customize the start time and the size of file. Allow you to clip and merge any segment optionally. High-Definition (HD) videos encoding and decoding are also highly supported. It offers multithreading and batch conversion.

you can try Leawo Video Converter which can convert videos and audios with video editing fucntions. leawo video converter can convert videos and audios between popular formats: AVI, MOV, MP4, MPEG, WMV, MOV, DivX, Xvid, VOB, ASF, MPG, MP3, WMA, 3GP, RM, RMVB, DV, TS, etc. and it can crop, trim and merge video files. you can even use this leawo video converter to Burn videos to DVD with DVD menu. Get Leawo video converter here------------------------- For windows: http://www.google.com/search?hl=en&q=leawo+video+converter&aq=f&aqi=&fp=5777bb8bebb07f34 For mac: http://www.google.com/search?hl=en&q=leawo+mac+video+converter&aq=f&aqi=&fp=5777bb8bebb07f34

I recommend 4Videosoft Video Converter Platinum which can convert between any video formats including MPG, MPEG, MPEG2, VOB, MP4, M4V, RM, RMVB, WMV, etc and extract audio from these video. It also converts between all audio formats including MP3, MP2, AAC, AC3, WAV, MID, MIDI, WMA, M4A, RA, RAM, OGG, APE, AU, FLAC . Hope it helps!

It was probably the codec used - all conversions effect quality - you can control the size of the file manually by adjusting the output resolution and bitrate etc Try Any Video Converter - free http://www.filehippo.com/download_any_video_converter/ or Super http://www.filehippo.com/download_super/

You can try this converter 4Easysoft Total Video Converter http://www.4easysoft.com/total-video-converter.html It can convert almost any the video format to another with high output quality. This full-featured video converter software also can help you: 1.convert between all mainstream video and audio formats,such as(mp4, mov, m4v, vob, XviD, avi, flv, 3gp, 3g2, mpg,wmv,HD videos,etc;m4v, mp3, wav, ac3,etc) 2.extract audio tracks from video files to other audio formats 3.support all popular portable multimedia players 4.edit video-Effect,Merge, Trim, Crop and Snapshot Here is the detailed guide: http://www.4easysoft.com/how-to-put-video-on-ipod.html Hope this can help you.