Here’s another quick command line for FFmpeg. It converts interlaced video and audio into deinterlaced DVD-ready files. Your output will be a VOB file, ready to be split into a file of the correct size by any DVD authoring program (e.g. DVDStyler) without any further recoding.
The command line you see below was written for a recent film show, where interlaced material had been supplied on DVD, where the projector would not resize interlaced video correctly, and where the only replay device was a standard DVD player.
This command line is careful to apply the appropriate flags to the bitstream to signal that the video uses broadcast levels, and encodes colour according to ITU Rec.601, the standard for European (PAL) SD television.
Two filterchains are in use. The video filterchain first de-interlaces the incoming video, then applies noise-reduction because the files given to me were already noisy and, therefore, would waste bandwidth after encoding. The audio filterchain delays the sound by just over a frame: I found this to be necessary, possibly because of delays introduced by the video coder and the video filter.
ffmpeg -i VIDEO_INPUT -target pal-dvd -vf "w3fdif, hqdn3d" -af "adelay=50|50" -color_range 1 -colorspace 5 -color_primaries 5 -color_trc 5 VIDEO_OUTPUT.VOB