Specify audio channels. The all-in-one video software that can convert multi-track HD videos AVCHD, MKV, TS, H.264/MPEG-4 AVC, SD videos AVI, MPEG, MP4, WMV, MOV, FLV, RM, RMVB, etc. Users can painlessly convert any videos for iPhone, iPad, iPod, PSP, Surface, Android, Samsung, Galaxy, HTC, Kindle Fire, DVD players, etc. It also can download online Dailymotion/Facebook/YouTube videos, make picture slideshow, and merge/crop/trim/subtitle videos, etc. How do I convert from mp4 to mp3 online might i thought about this best mp4 to mp3 converter
A stream specifier can match several stream, the option is then applied to all of them. E.g. the stream specifier in “-b:a 128k” matches all audio streams. Audio Converter Plus also support MP4 to M4A conversion if you wish to use audio tracks only with Apple devices. M4A is a newest audio format and provide better audio quality with less file size.