WebM to MP4 with FFmpeg — VP8/VP9 + Opus to H.264/AAC
Convert WebM (VP8/VP9 video, Opus/Vorbis audio) to MP4 with FFmpeg. Re-encode to H.264/AAC with CRF, when VP9 stream-copy is possible, faststart for web playback, quality/size trade-offs, and a full troubleshooting and FAQ section.
June 27, 2026
