The DiffALL Blog
Practical guides on image and video quality metrics, compression, and media comparison workflows.
How to Compare HDR and SDR Versions of a Video
Tone-mapping HDR to SDR is where highlights blow out and shadows crush. How to check what your conversion did, frame by frame, and why a raw score misleads.
Image ComparisonHow to Compare Two Versions of a Logo or Icon
A logo gets re-exported, an icon nudged two pixels, a colour one shade off, and nobody notices until it ships. Check a new asset against the approved one.
Audio ComparisonHow to Compare Two Microphone Test Recordings
Picking a mic by ear is unreliable: the louder one usually wins. Compare two microphone recordings on what differs: frequency response, noise floor, room.
Image ComparisonHow to Compare Two Scanned Documents for Differences
A scan has no text layer to diff. How to compare two scanned pages visually, catching altered clauses and swapped signatures through scanner skew and glare.
Image ComparisonHow to Compare Two AI-Generated Images from the Same Prompt
Same prompt, two different images. How to measure exactly what changed between seeds, models or sampler settings: composition, colour and fine detail.
Video QAHow to Compare Two Video Exports from Different Editing Software
The same timeline exported from two editors rarely gives the same file. Check whether new software or a preset changed your picture, and which changes are real.
Audio ComparisonHow to Compare Two Text-to-Speech Voices
Do two TTS clips sound like the same voice? How to check a voice model stayed consistent across versions or providers, and what a voiceprint can't tell you.
Video QAHow to Tell if a Video Has Been Re-Encoded
What re-encoded means, why a second encoding pass loses quality invisibly, and how to tell if a video was re-encoded when size and resolution won't show it.
Audio ComparisonHow to Compare Two FLAC Files for Lossless Audio Differences
Compare two FLAC files and see exactly where the audio diverges — spectral changes, timing shifts, or a re-encode that quietly altered the signal. Free, no install.
Text & DataHow to Compare Markdown Files for Documentation Changes
Compare two Markdown files and see exactly which lines of documentation changed — content, not just formatting noise. Free, no install.
Audio ComparisonHow to Compare OGG and OPUS Audio Files
Compare two OGG or OPUS files — or check one against the other — and see exactly how much the encoding changed the audio. Free, no install.
Subtitles & TextHow to Compare SRT and VTT Subtitle Files
Compare two subtitle files and see which lines of text or timing changed, between translations, revisions, or SRT and VTT versions of the same captions.