How to convert the file format ah can not open

Convert with Format Factory: 1, left double-click to open the converter - video (to audio when the audio selection) → 3gp, mp4, AVI ... (when converting audio there are mp3, wma...) →Add file→Find video-(or audio)→Double click→OK→Start. Cell phone, mp4, mp5 best to choose all to mobile devices - and then select and your device corresponding to the recommended configuration - do not forget to + also click on the selection - for conversion. 2、If you can't find the same model configuration, choose 3GP, MP4, AVI... Open the output configuration and choose low

quality. If your device is advanced, choose mp4, AVI medium quality or high quality. Or manually adjust the output configuration, in the video screen size 176x144-640x480. (Common 176x144-320x240-352x288) Frames per second 12-25 (Common 12 for mobile devices) Sampling rate 256-2400, Audio sampling rate 22050-48000, (Common 44100) Bit rate 64-224, (Common 44100) Bit rate 64-224. Bit rate 64-224 (common 96-128), video clarity size is the most critical, audio quality bit rate is the most critical. Resist equipment to support 3GP, mid-range 3GP, MP4, high-grade 3GP, MP4, AVI all support. Note; resistance equipment to adjust the parameters of the low point, to prevent playback errors, high-grade equipment can be adjusted up. 3, video clipping method; (audio clipping selection audio is).