Subtitle Requirements for International Film Festivals

International film festivals have strict subtitle technical requirements — learn what festivals expect and how to prepare your subtitles to avoid disqualification or rejection.

Major international film festivals — Cannes, Sundance, Berlin, Toronto — receive thousands of submissions from filmmakers around the world. Subtitles are not a production afterthought at these events; they are a core part of how juries, press, and audiences experience foreign-language films. Poor subtitles can seriously harm a film's reception, causing viewers to miss emotional beats, misunderstand plot points, or simply disengage. Because of this, festivals have developed detailed technical specifications for subtitle files. These cover everything from font type and size to character limit per line, reading speed, minimum and maximum display duration, and file format. Some festivals require Open Caption (subtitles burned into the video), while others require separate subtitle files in DCP format for digital cinema projection. If you're submitting a film with dialogue in any language, even English, check the festival's submission guidelines carefully before formatting your subtitles. Many festivals now provide their specification sheets on their websites, and some offer subtitle technical support for selected films. Getting your subtitles right is as important as getting your colour grade right — it affects how every viewer in the screening room experiences your work.

While each festival has its own requirements, most professional film subtitle standards share a common baseline. Reading speed is typically capped at 17 characters per second, which corresponds to roughly 170 words per minute — fast enough for an adult reader but not rushed. Each subtitle card should contain a maximum of two lines, with each line no longer than 40-42 characters including spaces. Minimum display duration is usually one second — any subtitle visible for less than this will not register for viewers. Maximum display duration is typically seven seconds to avoid subtitles overstaying their welcome when there is dialogue silence. Frame-accurate timing is essential for festival submissions. Subtitles that drift even slightly out of sync with dialogue feel unprofessional and distract from the film. Most festivals require subtitle files in the SRT or SCC format for digital submissions, though DCP deliverables often require XML-based subtitle formats like SMPTE-TT or IMSC. Fonts are usually specified — many festivals require Arial, Times New Roman, or their own branded subtitle font. Yellow with black outline remains the most legible colour combination for subtitles over mixed backgrounds, though white on black letterbox band is increasingly common in festival presentations.

Start your subtitle preparation early — ideally as soon as your picture is locked. Rushing subtitles at the last moment before a submission deadline is one of the most common mistakes independent filmmakers make, and the results show. Begin with a complete and accurate translation from a professional translator who has experience with film rather than general translation. Film dialogue has rhythm, subtext, and economy that general translators don't always preserve. A good film subtitle translator will capture not just meaning but register — the way characters speak tells us who they are, and that must survive translation. Once you have your translated text, sync your subtitle file to the final cut of your film using subtitle software like Aegisub, Subtitle Edit, or professional tools like EZTitles. Check every single subtitle against the film's audio and visual content. Pay special attention to reaction shots where characters respond non-verbally — subtitles that linger into these moments can undercut the actor's performance. Finally, export in the format specified by each festival and validate the file before submission. Zingo and similar tools can accelerate the translation and initial timing process, but always have a human professional review the final file before it represents your film on the international stage.