you have an error in this place -vcodec copy -target imx50 -vcodec copy copies a video stream without transcoding in IMX50 use only -target imx50 -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/muxing-into-mxf-im50-tp4221697p4223454.html Sent from the FFmpeg-users mailing list archive at Nabble.com.