We just improved the anything to MP4, anything to AVI and anything to MP3 conversions on CloudConvert.
Instead of setting the video bitrate of the H264 and MPEG4 codec to fixed 1000 kbps, we now automatically detect the best bitrate to get a very good quality video. Of course, it is still possible for advanced users to change this settings and to adjust the bitrate by their own.
Furthermore we use variable bitrates (VBR) insetad of constant bitrates (CBR) for MP3 now as default. You can adjust the bitrate range in the conversion settings.