> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tessact.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Upload local media

> Add image, video, or audio files from the computer through the Bin.

The Bin's upload control accepts local image, video, and audio categories. The browser reports each file's MIME type and provides bytes for upload, probing, and preview.

## Upload sequence

<Steps>
  <Step title="Open Bin and choose upload">
    Select one or more files with clear filenames. Avoid renaming extensions without changing the actual container format.
  </Step>

  <Step title="Wait for transfer and processing">
    Large video or lossless audio can take time. Keep the tab open and avoid submitting the same file repeatedly.
  </Step>

  <Step title="Confirm the Bin entry">
    Check the thumbnail, media kind, duration or dimensions, and filename.
  </Step>

  <Step title="Insert at an intentional frame">
    Move the playhead first, then add the uploaded asset as a timeline layer.
  </Step>

  <Step title="Test decoding">
    Seek and play the inserted layer. Upload success and browser decode success are separate stages.
  </Step>
</Steps>

## File selection guidance

* Prefer browser-friendly video and audio encodings for responsive previews.
* Use source dimensions close to the expected composition use; huge still images consume more decoding and texture memory.
* Preserve transparency only when the chosen image format and source actually contain an alpha channel.
* Use a short ASCII filename when diagnosing a problematic upload.

## Technical stages

```mermaid theme={null}
flowchart LR
  F["Local File"] --> U["Upload"] --> M["Remote asset metadata"] --> B["Bin"] --> L["Timeline layer"] --> D["Browser decode/cache"]
```

<Note>
  The upload input advertises broad `image/*`, `video/*`, and `audio/*` categories. Actual success still depends on backend ingestion and browser codec support; category acceptance is not a promise that every container-codec combination will preview.
</Note>

See [supported media guidance](/editor/media/supported-formats) and [media diagnostics](/editor/troubleshooting/media).