On https://free-av-tools.com you can:

Convert an audio file to another format - MP3, AAC, WAV, Opus, Vorbis (in the .mka container), FLAC, ALAC, AC3, DTS or CAF.
Convert a video to an audio-only file (to any of the above formats).
Convert a video to the MP4 or MKV format.
Change the audio codec of a video to MP3, AAC, AC3, DTS, WAV, FLAC or ALAC.
Trim a video or audio file (will not work if using the Safari browser).
Download a YouTube video or the audio only. The webpage is a youtube-dl wrapper.

Quick Links:

[1] Features (audio/video converter)

[2] Features (YouTube downloader)

[3] Supported Filetypes

[4] Tools used

[5] Requirements for developers/running locally

Features (audio/video converter):

You can see the file upload progress as a percentage and also amount uploaded (MB) in realtime.
Upload completion time is shown in realtime.
Whilst the file is being converted, you can see how far into the file the encoder currently is. This information is updated every second.

Features (YouTube downloader):

Download as an MP3 or MP4 file, or simply the best quality video/audio stream that is available.
Download the best quality audio stream without encoding it, so no lossy-to-lossy encoding is done (only applicable if you use the "Audio [best]" button.

Supported Filetypes:

Many filetypes are supported, click here for details.

Tools used:

FFmpeg is used for the audio and video converter. Configuration:

--enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree

youtube-dl is used for the YouTube downloader.

Requirements for developers/running locally:

You can run the Flask app locally for development purposes or if you want audio/video conversion to be quicker as the file(s) will not need to be uploaded to my server.

Python 3.6+
FFmpeg
pip install -r requirements.txt

If youtube-dl doesn't install when doing pip install -r requirements.txt, follow the instruction here to install youtube-dl, unless you do not wish to do any development/testing related to the YouTube downloader.

Clone this repository.
Change the value of ffmpeg_path in converter.py to the correct path.
Change the value of youtube_dl_path in yt.py to the correct path.
cd into the directory that main.py is and enter python3 main.py (or just python if that uses Python 3 for you) in the terminal.
Enter localhost:5000 in the address bar of your web browser and hit enter.

If you want to convert to AAC when running this web application locally:

When running locally, you will not be able to convert to AAC unless your build of FFmpeg has --enable-libfdk-aac in the configuration. This is because this web application uses the high quality fdk-aac AAC encoder, and "the license of libfdk_aac is not compatible with GPL" (source). Therefore, you cannot download a pre-built FFmpeg binary that supports that encoder. Here's how to complile FFmpeg on Ubuntu/Debian/Mint with libfdk_aac support, if your build of FFmpeg does not have --enable-libfdk-aac. Or, if you know what you're doing, you can edit the code in converter.py to use FFmpeg's native AAC encoder instead.

Building with Docker

Run these commands to build and run the Dockerfile.

Note: sudo is usually required on Linux.

docker build -t audio-and-video-converter .
docker run -p 5000:5000 audio-and-video-converter

Notes for contributors

Contributors are welcome, simply submit a pull request and I (BassThatHertz) will have a look at it within 24 hours.

[Python files] No more than 120 characters per line. Use f-strings instead of .format() if you know how to do so. Comment sections of code where the purpose may not be obvious to the reader.

chirag4979/AudioAndVideoConverter