python-media 0.2.4

In-memory video processing library powered by FFmpeg

pymedia

In-memory media processing for Python, powered by FFmpeg through native bindings (ctypes + bundled/shared native library).

python -m pip install python-media

Quick start

from pymedia import get_video_info, transcode_video, extract_audio

with open("video.mp4", "rb") as f:
    data = f.read()

info = get_video_info(data)
out = transcode_video(data, vcodec="h264", acodec="aac", crf=22)
mp3 = extract_audio(data, format="mp3")

Current status

Implemented domains:

• Video remux/transcode/edit/effects workflows
• Audio extraction/transcode/mixing/normalization workflows
• Frame extraction and preview generation
• Metadata read/write helpers
• Analysis utilities (keyframes, scene detection, trim strategies)
• Subtitle conversion and subtitle track operations
• Streaming-oriented helpers (fMP4, probe, GOP/loudness/timing analysis, HLS/DASH packaging)

Still evolving:

• More advanced stream-synchronized multi-input composition behavior
• Expanded HLS/DASH feature surface (for example encryption/richer profiles)

Public API (grouped)

info

• get_video_info

analysis

• list_keyframes, detect_scenes, trim_to_keyframes, frame_accurate_trim

audio

• extract_audio, transcode_audio, adjust_volume, fade_audio, normalize_audio_lufs
• change_audio_bitrate, resample_audio, silence_detect, silence_remove
• crossfade_audio, mix_audio_tracks

video

• convert_format, transcode_video, compress_video
• trim_video, cut_video, split_video
• mute_video, replace_audio, change_video_audio
• resize_video, crop_video, pad_video, change_fps, flip_video
• blur_video, denoise_video, sharpen_video, color_correct, apply_lut, apply_filtergraph
• add_watermark, overlay_video, stack_videos, split_screen, stabilize_video
• subtitle_burn_in, create_audio_image_video, video_to_gif

transforms

• rotate_video, change_speed, merge_videos, concat_videos, reverse_video

frames

• extract_frame, extract_frames, create_thumbnail, generate_preview

metadata

• set_metadata, strip_metadata

subtitles

• convert_subtitles, extract_subtitles, add_subtitle_track, remove_subtitle_tracks

streaming

• create_fragmented_mp4, stream_copy, probe_media
• analyze_loudness, analyze_gop, detect_vfr_cfr
• package_hls, package_dash

For signatures and detailed behavior, see docs under docs/.

Repository structure

src/pymedia/
├── __init__.py           # Public API exports
├── _core.py              # Native library loading + ctypes signatures
├── video.py              # Video/remux/transcode/effects wrappers
├── audio.py              # Audio extraction/transcode/processing wrappers
├── frames.py             # Frame/thumbnail helpers
├── transforms.py         # Rotation/speed/concat helpers
├── metadata.py           # Metadata helpers
├── info.py               # Probe/info helper
├── analysis.py           # Keyframe/scene/trim analysis helpers
├── subtitles.py          # Subtitle conversion/track helpers
├── streaming.py          # fMP4/probe/packaging helpers
└── _lib/
    ├── pymedia.c         # Native entry points / bridge layer
    └── modules/          # Native C implementation split by domain
        ├── video_core.c
        ├── video_effects.c
        ├── audio.c
        ├── filters.c
        ├── transforms.c
        ├── metadata.c
        ├── subtitles_tracks.c
        └── streaming.c

Installation

End user:

python -m pip install python-media

Development:

python -m venv .venv
source .venv/bin/activate
python -m pip install -U pip setuptools wheel
pip install -e .
pip install pytest

If the native library needs an explicit rebuild in source checkouts:

python setup.py build_ext --inplace

Docs

• docs/index.md
• docs/installation.md
• docs/features.md
• docs/video.md
• docs/audio.md
• docs/frames.md
• docs/metadata.md
• docs/info.md
• docs/analysis.md
• docs/subtitles.md
• docs/streaming.md
• docs/development.md

Contributing

Core rules:

• Keep wrappers in src/pymedia/*.py thin (validation + marshalling)
• Put heavy media logic in src/pymedia/_lib/modules/
• Add tests for each public API addition/behavioral branch
• Keep docs synchronized with code

Basic workflow:

pytest tests/ -v
black src/ tests/
isort src/ tests/
flake8 src/ tests/

License

MIT