If your source is lossy so is your output. Note: Video/audio output can only be as good as the video/audio input. To learn more about it and how presets affect the quality or encoding speed, check the H.264 encoding guide on the FFmpeg wiki. To set the quality, use -crf 23, where lower is better, and values from 18-28 are considered a good range.įfmpeg uses libx264's own preset system. Tests have shown this library functions comparatively if not more efficiently than Apple's Compressor or Episode, although both these programs have powerful features that ffmpeg does not have.
Wikipedia has related information at X264īefore using this in a production system please obtain the necessary licenses, you are warned! Wikipedia has related information at H.264/MPEG-4 AVC It's not natively supported in ffmpeg, so you will need to build ffmpeg with support for the external library, x264. It is heavier on encoding and decoding than preceding formats but results in much higher picture quality from smaller files. It is currently being used in formats such as Blu-ray, MP4, Flash (F4V), HTML5and most modern portable devices. H.264 is arguably the cutting edge of video compression codecs.
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