Started by Requiem, June 02, 2013, 09:59:26 pm
QuoteFrom http://www.avidemux.org/admWiki/doku.php?id=tutorial:h.264#generalLossless Mode: x264 also supports Ã¢â,¬Å"trueÃ¢â,¬Â lossless compression. Using this mode there will be absolutely no degradation to your video data. But lossless compression will take significant more bitrate than any lossy compression. So converting from a lossy format (e.g. MPEG-2 or MPEG-4 ASP) to lossless compression will produce a file much bigger than the source! Anyway, x264 in Ã¢â,¬Å"losslessÃ¢â,¬Â mode will usually still need less bitrate than other lossless encoders, such as HuffYUV or FFV1. And it's much smaller than uncompressed video (e.g. raw YUV/RGB data), of course. In order to enforce lossless compression, you must choose the Constant Quantizer mode and you must set the quantizer to a value of 0. Note that playback of lossless H.264 requires a decoder capable of the Ã¢â,¬Å"Predictive LosslessÃ¢â,¬Â profile. Decoders that support this include libavcodec/ffmpeg (ffdshow, MPlayer, etc.) and CoreAVC Decoder. Other decoders may display garbled output (or no output at all).