oximedia-transcode

High-level transcoding pipeline for OxiMedia with professional features and industry-standard presets.

Part of the oximedia workspace — a comprehensive pure-Rust media processing framework.

Version: 0.1.1 — 2026-03-10

Features

• Simple One-Liner API - Quick transcoding with sensible defaults
• Industry-Standard Presets - YouTube, Vimeo, broadcast, streaming, and more
• Multi-Pass Encoding - 2-pass and 3-pass encoding for optimal quality
• ABR Ladder Generation - Adaptive bitrate encoding for HLS/DASH
• Parallel Encoding - Encode multiple outputs simultaneously
• Progress Tracking - Real-time progress with ETA estimation
• Audio Normalization - Automatic loudness normalization (EBU R128/ATSC A/85)
• Quality Control - CRF, CBR, VBR, and constrained VBR modes
• Hardware Acceleration - Auto-detection and use of GPU encoders
• Filter Chains - Video and audio filter pipelines
• Codec Optimization - Codec-specific configurations (H.264, VP9, AV1, Opus)
• Job Management - Queue, schedule, and prioritize transcode jobs
• Subtitle Burn-in - Burn subtitles into video or embed as separate stream
• Scene Cut Detection - Detect scene boundaries for optimal segmentation
• Rate-Distortion Analysis - Optimal encoding parameter selection
• Segment Encoding - Encode media in independent segments
• AB Comparison - Compare two encoded outputs for quality assessment
• Watermark Overlay - Embed graphics or text during transcoding
• Concat Transcode - Join multiple media sources during transcode

Usage

Add to your Cargo.toml:

[dependencies]
oximedia-transcode = "0.1.1"

use oximedia_transcode::{Transcoder, presets};

// Simple transcode to YouTube 1080p
Transcoder::new()
    .input("input.mp4")
    .output("output.mp4")
    .preset(presets::youtube::youtube_1080p())
    .transcode()
    .await?;

use oximedia_transcode::{TranscodePipeline, MultiPassMode, QualityMode};

// Create HLS ABR ladder with multiple qualities
TranscodePipeline::builder()
    .input("source.mp4")
    .abr_ladder(presets::streaming::hls_ladder())
    .audio_normalize(true)
    .quality(QualityMode::High)
    .parallel_encode(true)
    .multipass(MultiPassMode::TwoPass)
    .progress(|p| {
        println!("Progress: {}% - ETA: {:?}", p.percent, p.eta);
    })
    .execute()
    .await?;

Supported Platforms

Streaming

• YouTube (1080p60, 4K, VP9/H.264)
• Vimeo (Professional quality)
• Twitch (Live streaming)
• Social Media (Instagram, TikTok, Twitter)

Broadcast

• ProRes Proxy (HD/4K)
• DNxHD Proxy (Avid)
• EBU R128 Compliant
• ATSC A/85 Compliant

Streaming Protocols

• HLS (HTTP Live Streaming)
• DASH (MPEG-DASH)
• CMAF (Common Media Application Format)

Archive

• Lossless/Near-Lossless (FFV1)
• VP9/AV1 Archival

API Overview

• Transcoder — Simple fluent API: input(), output(), preset(), video_codec(), audio_codec(), multi_pass(), quality(), transcode()
• TranscodeConfig — Configuration: input, output, codecs, bitrates, resolution, frame rate, subtitle/chapter modes
• TranscodeOutput — Result: output path, file size, duration, bitrates, encoding time, speed factor
• TranscodePipeline — Complex pipeline builder with ABR, normalization, parallel encoding
• AbrLadder / AbrRung / AbrStrategy — Adaptive bitrate ladder construction
• MultiPassMode / MultiPassEncoder — Two-pass and three-pass encoding
• QualityMode / QualityPreset / RateControlMode — Quality and rate control
• HwAccelType / HwEncoder / HwAccelConfig — Hardware acceleration management
• AudioNormalizer / LoudnessStandard / LoudnessTarget — Audio loudness normalization
• ParallelEncoder / ParallelConfig — Concurrent multi-output encoding
• JobQueue / TranscodeJob / JobPriority / TranscodeStatus — Job management
• ProgressInfo / ProgressCallback / ProgressTracker — Real-time progress
• PresetConfig — Preset container for video/audio codec, bitrate, resolution, frame rate
• CodecConfig / H264Config / Vp9Config / Av1Config / OpusConfig — Codec-specific settings
• AudioFilter / VideoFilter / FilterNode — Filter chain nodes
• SubtitleMode / ChapterMode — Subtitle and chapter handling
• TranscodeError / Result — Error and result types
• Modules: ab_compare, abr_ladder, adaptive_bitrate, audio_channel_map, audio_transcode, bitrate_control, bitrate_estimator, burn_subs, codec_mapping, codec_profile, concat_transcode, crop_scale, crf_optimizer, encoding_log, examples, frame_stats, output_verify, presets, rate_distortion, resolution_select, scene_cut, segment_encoder, segment_transcoder, stage_graph, thumbnail, transcode_metrics, transcode_session, two_pass, utils, validation, watermark_overlay

License

Apache-2.0 — Copyright 2024-2026 COOLJAPAN OU (Team Kitasan)