Convert MP4 to OGV — Free Online Converter

MP4 to OGV conversion transcodes your MPEG-4 video into the Ogg Video format using the Theora video codec and Vorbis audio codec. OGV is a completely open, royalty-free video format maintained by the Xiph.Org Foundation. It was the first open video codec to gain widespread browser support and was instrumental in the early HTML5 video movement before WebM and AV1 emerged.

Our converter transcodes the MP4 video stream to Theora and the audio to Vorbis, muxing both into the Ogg container with the .ogv extension.

OGV is relevant when you need a completely patent-free, open-source video format. Some organizations, particularly in government, education, and open-source communities, have policies requiring royalty-free media formats. Wikipedia uses Ogg Theora for all video content. LibreOffice Impress embeds OGV for presentations. Firefox historically preferred OGV before adding H.264 support. While WebM (VP8/VP9) has largely succeeded OGV for new content, existing Theora-based systems still require this format.

FFmpeg transcodes the MP4 H.264 video to Theora using the libtheora encoder. Quality targets range from 0 (lowest) to 10 (highest), with 6-7 producing good results for web delivery. Audio is re-encoded to Vorbis. Theora is based on VP3, an older codec from On2 Technologies, and is significantly less efficient than H.264 or VP9 — expect larger files or lower quality at equivalent bitrates. Maximum practical resolution is 1080p, though Theora performs best at 480p-720p.