What causes "Unsupported media type" in tonhowtf/omniget?

Check which media type the post resolved to and add a handler for it in native_download's match

Unsupported media type

Error message

Unsupported media type

What it means

native_download in reddit.rs terminates its match on the media type with a catch-all `_ =>` arm that returns this anyhow error. It means the reddit media item resolved to a type the downloader does not implement (neither direct file, HLS/DASH stream, nor torrent path handled above). The library throws it when a post contains an unsupported media kind, so it refuses to download rather than produce a corrupt file.

Solutions

Check which media type the post resolved to and add a handler for it in native_download's match
Verify the URL is a supported Reddit post type (video/image, not gallery/poll/live)
Update the library to a newer version that may support this media type
Handle the error in the caller and surface a 'post type not supported' message instead of retrying

Example fix

// before
_ => Err(anyhow!("Unsupported media type")),
// after
Some(MediaType::Gallery) => Err(anyhow!("Reddit galleries are not supported yet; download items individually")),
_ => Err(anyhow!("Unsupported media type: {:?}", media.media_type)),

Defensive patterns

Strategy: validation

Validate before calling

const SUPPORTED_MEDIA_TYPES = ["video", "image", "hls", "torrent"];
if (!SUPPORTED_MEDIA_TYPES.includes(String(post.media_type))) {
  throw new Error(`Reddit media type '${post.media_type}' is not supported for download`);
}

Type guard

function isDownloadableRedditMedia(m) {
  return m != null && ["video", "image", "hls", "torrent"].includes(String(m.media_type));
}

Try / catch

match platform.download(url).await {
    Err(e) if e.to_string().contains("Unsupported media type") => warn_user("This Reddit post type is not supported"),
    other => other?,
}

Prevention

Filter URLs by supported Reddit post kinds before dispatching to download
Log the resolved media type alongside the error for diagnosis
Keep the match arm list in sync with Reddit API media variants
Check the library changelog for newly supported media types

When it happens

Trigger: Calling download on a Reddit post whose resolved media type falls into the default match arm — e.g. a gallery, live post, poll, crosspost, or a new embed type not covered by the handled variants.

Common situations: Reddit introduces/renames a media type in its API; users submit gallery or live-stream URLs; the platform handler's URL pattern matched but the inner media kind was never supported.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/cf2f8a8ada9b4e9d. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/platforms/reddit.rs:767

                        Some(&opts.cancel_token),
                    )
                    .await?;

                    total_bytes += bytes;
                    last_path = output;

                    let percent = ((i + 1) as f64 / count as f64) * 100.0;
                    let _ = progress.send(ProgressUpdate::percent(percent)).await;
                }

                Ok(DownloadResult {
                    file_path: last_path,
                    file_size_bytes: total_bytes,
                    duration_seconds: 0.0,
                    torrent_id: None,
                })
            }
            _ => Err(anyhow!("Unsupported media type")),
        }
    }
}

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