無料オンラインAV1からM4Rへのコンバーター

AV1 is a new open codec developed by Alliance for Open Media consisting of companies that produces electronics and develops web browsers. The codec is aimed to send high-quality videos via the internet quickly and without losing the quality even when bandwidth is low. AV1 is more efficacious then today's most popular video formats because it uses future compression technology.

M4R - is a digital multimedia container format used to store audio in mono channel mode. This format is suitable for store ringtones and it is widely used by Apple iPhone for its ringtones. Needless to say that M4R and M4A formats shares many similar features.