Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp (default) However, I get an error: opus in MP4 support is experimental, add '-strict -2' if you want to use it.Ĭould not write header for output file #0 (incorrect codec parameters ?): Experimental featureĬomplete log: ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developersīuilt with gcc 9.3.0 (Arch Linux 9.3.0-1)Ĭonfiguration: -prefix=/usr -disable-debug -disable-static -disable-stripping -enable-fontconfig -enable-gmp -enable-gnutls -enable-gpl -enable-ladspa -enable-libaom -enable-libass -enable-libbluray -enable-libdav1d -enable-libdrm -enable-libfreetype -enable-libfribidi -enable-libgsm -enable-libiec61883 -enable-libjack -enable-libmfx -enable-libmodplug -enable-libmp3lame -enable-libopencore_amrnb -enable-libopencore_amrwb -enable-libopenjpeg -enable-libopus -enable-libpulse -enable-libsoxr -enable-libspeex -enable-libssh -enable-libtheora -enable-libv4l2 -enable-libvidstab -enable-libvorbis -enable-libvpx -enable-libwebp -enable-libx264 -enable-libx265 -enable-libxcb -enable-libxml2 -enable-libxvid -enable-nvdec -enable-nvenc -enable-omx -enable-shared -enable-version3

I'm trying to merge WebM file with Opus audio + MP4 file with H.264 video into a MP4 file: ffmpeg -i audio.webm -i video.mp4 -c copy output.mp4

Undf video format mac