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

# Threads media guidelines

> See the video and image limits that OpenPMM applies to Threads Destinations.

Threads has the most detailed video contract of the Meta channels. Read [Media guidelines](/docs/media/overview) for the general rules.

## Self-reply chains

Repeat the Post `body` value to publish a Threads self-reply chain. Media
can attach to each body item, and any body item can contain media without text.
OpenPMM checks both the Threads post quota and the reply quota before
publication. Existing connections must reconnect once to grant the
`threads_manage_replies` permission.

If publication stops part-way, a retry resumes at the first missing reply.

## Media per post

A Threads post accepts up to 20 assets.

## Video limits

| Property          | Limit                                                           |
| ----------------- | --------------------------------------------------------------- |
| Container         | MP4 or MOV                                                      |
| Video codec       | H.264 or HEVC                                                   |
| Duration          | More than 0 seconds, and 300 seconds maximum                    |
| Frame rate        | 23 to 60 fps                                                    |
| Width             | 1,920 px maximum                                                |
| Aspect ratio      | 0.01:1 to 10:1                                                  |
| Video bitrate     | 100 Mbps maximum                                                |
| Pixel format      | YUV 4:2:0                                                       |
| Scan type         | Progressive                                                     |
| File size         | 500 MiB. Threads permits 1 GiB, but the OpenPMM limit is lower. |
| Audio codec       | AAC                                                             |
| Audio sample rate | 48 kHz maximum                                                  |
| Audio channels    | Mono or stereo                                                  |
| Audio bitrate     | 128 kbps maximum                                                |
| MP4 layout        | Fast start. The file index must be before the video data.       |
| Edit list         | Not accepted                                                    |

Threads recommends a 9:16 vertical video. OpenPMM gives advice for a different aspect ratio, but it does not block the post.

## Image limits

| Property     | Limit                                                  |
| ------------ | ------------------------------------------------------ |
| Format       | JPEG or PNG                                            |
| File size    | 8 MB maximum                                           |
| Aspect ratio | 10:1 maximum                                           |
| Width        | Threads scales an image to between 320 px and 1,440 px |
| Colour space | Threads converts an image to sRGB                      |

OpenPMM converts a WebP or a GIF image, and makes the file smaller when it is
above 8 MB. See [Media compatibility](/docs/guides/media-compatibility).

## Limits that OpenPMM cannot check

Threads documents a closed group of pictures (GOP). OpenPMM cannot read this property from the file. Make sure that your encoder writes a closed GOP.

## Provider documentation

[Threads posts and media specifications](https://developers.facebook.com/docs/threads/posts)