From FFmpeg's point of view, this means converting the MP3 audio stream into a Vorbis audio stream and wrapping this stream into an OGG container. This command takes an MP3 file called input.mp3 and converts it into an OGG file called output.ogg. Usually it automatically selects the correct codecs and container without any complex configuration.įor example, say you have an MP3 file and want it converted into an OGG file: ffmpeg -i input.mp3 output.ogg Luckily, FFmpeg is pretty clever with its default settings. The thing that trips up most people when it comes to converting audio and video is selecting the correct formats and containers. You should be prepared to settle in for a while when you use FFmpeg. To learn more, click on the links above.īe aware that video and audio encoding can take a very long time to run. This explanation is enough to get you through this article. Many require certain streams and metadata or put restrictions on the codecs or contents allowed. This is an abstract representation of media files and skips over a lot of the differences between containers. It all depends on what the container is set to allow. Different containers will allow for different streams, e.g., subtitles, chapter information, or other metadata. The streams in a container don't have to be just audio or video though. Some containers are highly advanced and allow for any sort of stream, including multiple video and audio streams inside a single container. It presents a single interface that media players and tools can interact with. The container is the wrapper for the streams. Neither is inherently better than the other, as each is trying to do different things. This means a FLAC-formatted file will be much larger than a Vorbis audio stream but should sound better. For example, the FLAC codec is good for high-quality lossless audio, whereas Vorbis is designed to compete with MP3 in file size while offering better audio quality. Each codec has its own properties, strengths, and weaknesses. The streams include the actual AV components, such as a movie's audio or video, and are encoded using a particular media encoding, or codec. Media filesĪt a very high-level view, a media file is broken up into a container and its streams. Before we look at using FFmpeg, first we need to take a quick look at what a media file exactly is. In this article, we are interested in using it to convert files, so we won't be taking a deep dive into its entire feature set. It can be downloaded from the FFmpeg website or through most package managers.įFmpeg is a powerful tool that can do almost anything you can imagine with multimedia files. It's available on many different operating systems and is included in some operating systems by default. In this article I'll be using FFmpeg through the command-line tool ffmpeg, which is only a single, small piece of the FFmpeg project. Despite its name, it has nothing to do with the Moving Picture Experts Group or the myriad multimedia formats it has created. It's often used behind the scenes in many other media-related projects. Enter FFmpeg.įFmpeg is a collection of different projects for handling multimedia files. Tools like Audacity or Handbrake are fantastic, but sometimes you just want to change a file from one format into another quickly. There are many open source tools out there for editing, tweaking, and converting multimedia into exactly what you need. When this happens I use the following command to quickly convert the audio to FLAC or some other lossless audio format that I know it'll pick up, and then run the -scan again on the new file:įfmpeg -i title00.mkv -c:v copy -c:a flac title00-flac. Very occasionally I find that the -scan step doesn't detect a language track at all when there is definitely one present, especially when the audio codec is "pcm_s16le". here, accordingly (see extensive README file in the above link). You might need to add -filter deinterlace or -add-audio. Mkdir processed & cd processed & transcode-video. Might want to skip through it in a media player, too. Mediainfo title00.mkv to double-check that the video really isn't interlaced. Also detects any obvious combing/interlacing. Transcode-video -scan title00.mkv to check if there's any additional audio or subtitle tracks you want to include. Delete any files you don't want to encode. Rip the disc using MakeMKV and cd to the directory containing the output file(s) you want to encode. This Ruby Gem (hopefully as easy as sudo gem install video_transcoding) My current method (which admittedly you will only find "friendly" if you're comfortable with the command line):
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