Guide - Create video

What this form is for

This is the last step of the chain: it combines the audio, a fixed background image and the synchronized subtitles into a single MP4 video file, with the text appearing and disappearing on screen exactly at the times set in the Sync lyrics form.

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Audio, subtitles and image

The three fields must be filled in order, because each one only unlocks after the previous one:

Audio file (mp3): the final track, usually the one generated by the MIDI → MP3 conversion form.
Subtitle file (srt): only enabled after choosing the audio. If an .srt file with the same name as the mp3 exists in the same folder (the one exported from Sync lyrics) it is proposed automatically.
Background image: only enabled after choosing a valid subtitle file. This is the static image that will stay visible for the whole duration of the video, with the text overlaid on top.

Why this forced order: it avoids starting a generation with inconsistent file combinations (e.g. subtitles from a different song). If you exported the SRT with the same name as the mp3 as recommended in the sync guide, in practice you only need to choose the image.

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Choosing the font

The button opens the system window to choose the text font (typeface, bold style, size) that will be overlaid on the video. If you don't choose anything, a default font is used (depends on the operating system) at a standard readable size.

Default font: Impact on Windows, Helvetica on macOS, FreeSans on Linux, size 32.
Size: the value chosen in the dialog is multiplied by 2.5 in the video (32 becomes about 80 pixels), because otherwise the text would end up tiny. Recommended range is 24 to 40: below about 20 the text is hard to read, above about 48 long lines risk running off the edges of the video.
Bold: recommended when the background image is light or full of detail.

Why choose it: a heavier/more readable font (e.g. bold) helps reading on small screens or with "busy" background images. If the song will be projected on a big screen, the default is usually already fine.

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Create Video

It only becomes active once all three files (audio, subtitles, image) are valid. It generates the MP4 video in the same folder as the audio, with the same name as the mp3 file (only the extension differs). The progress bar and the estimated time remaining show the processing status.

Why check the three files carefully before starting: processing a video can take a few minutes per song; checking in advance that the subtitles and image are the right ones avoids having to redo the whole generation.

Note: if the SRT file has no valid lines (no line with a start/end time), video creation stops with an error: go back to the Sync lyrics form and finish the synchronization before trying again.

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