Photo to video converter tools: what to check before you install one

What to take away

Start with the destination, not the tool

A photo to video converter takes a set of still images, adds motion, transitions and often music, and exports a video file. A slideshow for a family tablet needs different settings from a clip for YouTube.

Write down the destination before you search. It could be a phone gallery, a social platform, a website or a printed-media playback screen. Each has limits on file type, shape and size, and the tool must be able to meet them.

YouTube publishes recommended upload encoding settings, which make a useful benchmark for any converter. It recommends the MP4 container, the H.264 video codec, and AAC-LC or Opus audio at a 48 kHz sample rate. It says to encode and upload at the frame rate you recorded, with common rates of 24, 25, 30, 48, 50 and 60 frames per second, and that 16:9 is standard on computers while vertical and square videos are accepted. For 1080p standard dynamic range video, it lists a recommended bitrate of 8 Mbps at standard frame rates and 12 Mbps at high frame rates.

Use that as a checklist. Before installing, look at the converter's own page or help text and ask whether it can export MP4 with H.264 video, set the frame rate, choose vertical, square or widescreen shapes, and output at the resolution you need.

Export checks that are worth five minutes

Make a short test with three or four photos and check the result on the device where it will be shown.

Watermarks, trials and subscriptions

Free versions of media tools commonly limit what you can export, so look for the restriction before you start. The usual ones are a logo on the video, a cap on length or resolution, or a trial that ends and moves to a paid plan. Read the app listing's description of the free tier, then test it with your short clip.

For paid tools, note the price, the billing period and how to cancel before you enter payment details. Ask whether the licence is for one device or several, and whether exports made during a subscription remain usable after it ends.

UK law gives paid users some protection. The Consumer Rights Act 2015 applies to a contract for a trader to supply digital content for a price paid by the consumer, and also to digital content supplied free with goods, services or other content for which the consumer pays. Under the Act, digital content must be of satisfactory quality, reasonably fit for a purpose the consumer made known beforehand, and must match the description the trader gave. If it does not, the consumer's main rights are repair or replacement and then a price reduction, and a non-conformity arising within six months of supply is presumed to have existed at supply unless that is shown to be wrong. A price reduction must be refunded within 14 days using the original payment method. A free app used on its own does not fall under this chapter, because no price is paid, so the protection is mainly useful if you pay. The guide to consumer rights when a repair fails explains how the Act works for goods and services more generally.

Privacy: where do your photos go?

Photos are personal data. They show faces, places, dates and often location information. The key question is whether the conversion happens on your device or on the developer's servers.

Both app stores now publish privacy labels. Apple's App Privacy details, shown on the App Store listing, require developers to declare data they or their partners collect, and "collect" means transmitting data off the device in a way that lets the developer or partners access it for longer than needed to service a request in real time. Photos or Videos is a named data type, and the labels also show whether data is used to track you and whether it is linked to your identity. Data processed only on the device does not have to be declared.

Google Play's Data safety section works in a similar way. Developers declare data sent off the device, including through third-party libraries, whether it is shared with third parties, whether it is encrypted in transit, and whether users can request deletion. It also requires a privacy policy link. Google reviews the form but leaves responsibility for accuracy with the developer.

Use the labels like this:

UK GDPR exempts processing by an individual in the course of a purely personal or household activity, so a private family video is outside its scope. Posting the video publicly, or using the tool for a business, changes the position. In that case the people in the photos have data protection rights, and children's images deserve extra care. The data privacy rights guide for devices sets out the rights you have over your own data, which apply in the same way to an app that holds your photos.

Licensing: music, templates and other people's photos

GOV.UK says copyright protects music and sound recordings, photographs and film, and stops others using the work without the owner's permission, including copying and posting it online. A song you like is not a song you can post. The exceptions in UK law are narrow: they cover things such as private time-shifting of broadcasts, criticism, review and quotation, and parody, and fair dealing considers whether the use replaces the original and reduces the owner's revenue.

In practice, check these four things:

If the terms are unclear, keep your videos private and choose a tool that spells them out.

A short pre-install routine

Use the pre-purchase technology checklist as a template and add these lines: the destination format, the export test result, the watermark rule, the privacy label and the licence for music and templates. If you are comparing several tools, the approach in how to build a technology shortlist keeps the comparison fair.

Official sources