Audio/Video is the highlight of HTML5. It is inevitable to deal with audio and video files on the web front-end. The browser team is united, and the formats of audio and video support are quite different, generally, three to four different formats need to be prepared for the same audio and video. Easy-to-use free conversion software is required. Among such free software, Chinese goods are shameless. Please bypass. I have found some of the recommended ones from Google, and I have used them myself.
(1) Free Audio Converter and free video converterfree Audio Converter from freemake.com
Supports MP3, WMA, WAV, FLAC, AAC, m4a, Ogg, and more than 30 audio formats. 264, Avi, MPEG, MP4, MKV, DivX, mov, WMV, vob, 3GP, RM, QT, FLV, and other 50 video file formats to extract audio files.
Free Video Converter
Supports Avi, MP4, WMV, MKV, MPEG, 3GP, DVD, MP3, iPod, iPhone, PSP, Android, rip & burn DVD, flash FLV & SWF, burn Blu-ray, supports more than 200 input formats, supports direct conversion from more than 50 video websites to paste URLs, and supports direct upload to YouTube.
(2) Any Video Converter free version and any audio converterany Video Converter free version from any-video-converter.com
Supports DivX, Xvid, mov, RM, rmvb, Avi, MP4, WMV, MKV, MPEG, FLV, 3GP, DVD, MP3, iPad, iPhone, Android, PSP, Tablets
Any Audio Converter
Supports MP3, WMA, wave, AAC, m4a, Ogg, ape, FLAC, Avi, MP4, WMV, and rmvb. Apart from audio to audio conversion, you can also extract audio files from videos.
(3) free MP3 WMA Ogg Converter
Supports output of MP3, WMA, WAV, Ogg, AAC, m4a, FLAC, and MP2, and audio extraction from video files such as Avi, MPEG, WMV, MP4, FLV, mov, and HD.
(4) Free Video Converter from myconverters.com
Supports Avi, WMV, including Avi, WMV, HTML5 videos (MP4, Ogg, webm), ASF, MKV, ASF, MKV, H. 264, RM, rmvb, mov, QT, MP4, DV, 3GP, mpg, MPE, MPEG, dat (VCD), vob (DVD), Asx, ts, MTS, FLV (Flash video), and audio Ra, ape, WMA, MP3, m4a, AAC, aa3, Ogg, FLAC, WAV, and more than 120 video formats, you can also export image files from videos.
There are other similar free software, but I haven't downloaded and tried it, so I won't talk about it. There are basically no advertisements for these free software abroad, and there is no rogue software attached, which is also very powerful.
For occasional conversion of audio and video files with a small quantity and a small size, you can use some online conversion websites, such as this, this, or Google to search for free online audio video converters.
Source: http://blog.csdn.net/cuixiping/article/details/7569269