Take it step by step
- Choose Media inspection and read the listed streams. It reports container information without transmitting the file.
- Extract video audio when an audio stream exists. Use WAV for an editing handoff or MP3 for common listening apps.
- Extract embedded subtitles only for a text subtitle track. The first matching track exports as SRT; edit and shift timings with Subtitle editor.
- Use Video frame extractor for individual JPEGs or Video thumbnail grid for a contact sheet. Select a bounded interval and inspect the selected frames.
A situation to try.
Try an example in Extract embedded subtitles uses a synthetic MKV containing a known caption. A video with no subtitle track produces actionable feedback instead of inventing a transcript.
Use the tool’s synthetic example first where available. The example here explains a decision; it is not a reported benchmark result.
Before you call it done.
- Burned-in captions are pixels and cannot be extracted as text here.
- Bitmap subtitle formats are unsupported by the text export.
- A muted clip has no soundtrack to extract.
- Frame extraction is capped at 60 frames to bound memory.
Know the limits.
This release does not automatically transcribe captions inside these extraction tools. Embedded track selection is limited to the first matching text subtitle track. Review subtitle timing in your destination player.
This tool’s current boundary: A file without an audio track cannot produce a soundtrack. Lossy encoding changes quality.
Evidence and scope
Technical source guidance and task-specific output checks. These do not establish that every file, browser or device passes.
Use the checks above on your own exported result. A source explains the format or mechanism; it is not proof that this export preserved every feature.
Technical reference: FFmpeg: stream selection ↗
Choose the right tool for this step.
Extract video audio
Save a video soundtrack as MP3, WAV, FLAC or M4A.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Extract embedded subtitles
Export the first embedded text subtitle track as SRT.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Subtitle editor and converter
Edit and convert SRT/VTT cues and timestamps.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Video frame extractor
Download selected frames as individually named JPEG images.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Video thumbnail grid
Create a compact JPEG contact sheet of sampled video frames.
On your deviceWhy use it: Use this task-specific local workspace.
Before you start: Keep your original and review the stated format and device limits.
Preparation tools process locally. Official service links take you to the authority’s website. Inspect any exported copy before sharing it.