Convert JPG to MP4 Online & Free

Use our fast and secure convert JPG to MP4 tool to turn images into smooth videos online, free, and without installing software; this JPG to MP4 converter keeps quality high, supports bulk images, and lets you set duration and order for a clean result, making it ideal for slideshows, social posts, and quick demos with simple steps and instant processing.

More online JPG converters to transform your images

Want more ways to convert your images? Explore our easy online tools to switch JPG into formats like MP4, PNG, PDF, and more—fast, secure, and free. If you need a smooth video from your photos, try our JPG to MP4 converter, or pick another format that fits your workflow.

Frequently Asked Questions about JPG to MP4 Conversion

Find quick, clear answers to the most common questions about converting JPG images to MP4 videos. Below, we cover how it works, supported settings, file limits, privacy, speed, and troubleshooting tips—so you can convert with confidence.

What image resolution and aspect ratio should I use to avoid black bars in the MP4?

To avoid black bars in your MP4, match the video’s aspect ratio to your target display and use a standard resolution with that ratio: for 16:9 use 1920×1080, 1280×720, or 3840×2160; for 4:3 use 1440×1080 or 1024×768; for 1:1 use 1080×1080; for vertical 9:16 use 1080×1920; for ultrawide 21:9 use 2560×1080 or 3440×1440. Ensure your content is encoded and exported with the same aspect ratio (no mismatched letterboxing/pillarboxing), disable “fit with black bars” options, and if needed crop or pad intentionally to the exact ratio before export.

How can I set the frame rate or duration per image when turning JPGs into an MP4 slideshow?

You can control slideshow speed either by setting a frame rate (fps) or a fixed duration per image. A higher fps shows more images per second (e.g., 2 fps ≈ 0.5 s per image), while specifying a duration per image (e.g., 3 seconds) makes each photo stay on screen that long regardless of fps.

With FFmpeg, for a fixed duration per image, use an input framerate and the concat demuxer: create a text file listing your images like “file img1.jpg” and “duration 3”, then run: ffmpeg -f concat -safe 0 -i list.txt -vf scale=1920:-2 -r 30 -pix_fmt yuv420p out.mp4. For a simple fps-based approach: ffmpeg -framerate 1 -pattern_type glob -i «*.jpg» -vf scale=1920:-2 -r 30 -pix_fmt yuv420p out.mp4 (1 fps = 1 second per image).

In GUI editors, look for settings like Image duration, Slide duration, or Timeline fps. Set the image/slide duration (e.g., 2–5 s) for consistency, and choose a video fps (commonly 24–60) for smooth playback. Export as MP4 (H.264) and preview to ensure the timing matches your preference.

Will the MP4 file be compressed and can I control video quality or bitrate?

Yes, the resulting MP4 is typically compressed. MP4 is a container that commonly uses H.264/H.265 codecs, which apply lossy compression to balance file size and quality.

You can usually control video quality through options like target quality level, resolution, and frame rate. Some tools also let you pick a VBR (variable bitrate) or CRF (constant rate factor) to fine-tune visual fidelity.

If available, set a specific bitrate (e.g., 2–8 Mbps for HD) for predictable file sizes, or use a quality-based mode (e.g., CRF 18–24) for consistent visual quality. Higher bitrate/quality settings yield better results but larger files.

Are my files secure during upload and how long are they stored?

We protect your uploads with HTTPS encryption in transit and store them securely on our servers. Only the conversion process accesses your files, and we never use them for analytics, advertising, or training.

Files are kept only as long as needed to complete the conversion, then are automatically deleted—typically within a short window. You can also remove them sooner using the delete option after your download.

Can I merge multiple JPGs into a single MP4 and set transitions or background music?

Yes—use a video editor or a command-line tool to turn multiple JPGs into an MP4, add transitions, and include background music: with desktop apps (e.g., iMovie, Shotcut, DaVinci Resolve), import the images, set each photo’s duration, apply crossfades or other transitions, drop in an audio track, then export as MP4; with FFmpeg, you can sequence images (e.g., 001.jpg, 002.jpg…), set per-image duration and frame rate, add a crossfade filter chain for transitions, and mix in an audio file before encoding to H.264 MP4.

Why is my MP4 not playing on my device and which codecs are supported?

Your MP4 might not play because MP4 is just a container, and the actual video/audio inside can use different codecs. If your device or app doesn’t support the specific codec (e.g., certain profiles of H.264 or newer formats like HEVC/H.265), you may get errors, black screen, or no audio. Corrupt files, high bitrates, unusual resolutions/levels, or missing hardware decoding can also cause playback issues.

Most modern devices reliably support MP4 with H.264 (AVC) video and AAC audio. Many newer phones, TVs, and browsers also support HEVC (H.265) video and Opus or AC-3 audio, but support varies by brand, model, and region. Older devices might only handle Baseline/Main Profile H.264, limited resolution (e.g., 1080p), and standard frame rates.

To fix playback: re-encode to H.264 + AAC in an MP4 container, target common settings (Main Profile, Level 4.0/4.1, 8-bit, 1080p, ≤10–15 Mbps), and use a compatible audio sample rate (44.1/48 kHz). Alternatively, update your player/OS or try a versatile player (e.g., VLC). If the file is corrupt, remux or redownload it before re-encoding.

What is the maximum file size or number of images allowed for conversion?

The maximum file size per upload is typically 100 MB, and you can upload up to 50 images at once; if you hit a limit, try compressing images, splitting them into smaller batches, or reducing resolution before uploading.

What’s the difference between a JPG file and an MP4 file?

A JPG (or JPEG) is a compressed image file format designed for photos and graphics. It uses lossy compression to reduce file size while maintaining acceptable visual quality, making it ideal for web images, social media, and photo sharing.

An MP4 is a video container format that can hold video, audio, subtitles, and metadata. It commonly uses codecs like H.264/H.265 for video and AAC for audio, enabling efficient streaming and playback across most devices and platforms.

In short: JPG = single still image; MP4 = moving pictures with sound. Use JPG to store or share a photo; use MP4 to capture or distribute video content.

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