![]() You can match the profile with the table shown above to get a hang of it. If we were to change that to 2, it would be the standard ProRess 422, and so on. If you see the commandline, we’ve used -profile:v 3 to choose Apple ProRes 422 HQ variant using FFmpeg. The commandline for Apple ProRes 422 (HQ) encoding is pretty straightforward using the options above – ffmpeg -i inputVideo.mp4 \ Related: VMAF in FFmpeg - Installation and Usage Guide for Ubuntu Encoding Apple ProRes 422 HQ using FFmpeg Specify number of bits for alpha component. A custom vendor ID like apl0 would claim the stream was produced by the Apple encoder. Number of macroblocks in each slice (1-8) the default value (8) should be good in almost all situations. Different profiles use between 2 bits per macroblock, the maximum is 8000. How many bits to allot for coding one macroblock. If not set, the matrix providing the highest quality, default, will be picked. If this option is set to auto, the matrix matching the profile will be picked. Apple ProRes 4444: ‘ap4h’ (‘ h4pa‘ in little-endian).Apple ProRes 422 Proxy: ‘ apco‘ (‘ocpa’ in little-endian).Apple ProRes 422 LT: ‘ apcs‘ (‘scpa’ in little-endian).Apple ProRes 422 Standard Definition: ‘ apcn‘ (‘ncpa’ in little-endian).Apple ProRes 422 High Quality: ‘ apch‘ (‘hcpa’ in little-endian). ![]() The FourCC codec IDs for the different Apple ProRes variants are – Profile : You can use this option to choose the ProRes profile to encode. You can choose the encoder you want using the -vcodec option. Source: Wikipedia Apple ProRes Profiles in FFmpegįFmpeg contains two ProRes encoders, the prores-aw and prores-ks encoder. Also, ProRes 44 XQ use the 4:4:4 chroma subsampling schema with either 10 or 12-bit depth and can optionally include an alpha channel.Ī concise table from Wikipedia captures the bitrates and resolutions that the various ProRes variants can support. All ProRes422-variants use 4:2:2 10-Bit subsampling formats. ProRes supports different resolutions and chroma sampling schemes. ![]() The goal of ProRes is to retain the video quality while attaining an agreeable amount of compression. ProRes is basically used as an intermediate compression format and is not to be used to compress videos with an intention of getting high compression efficiency. The data rates vary based on codec type, image content, frame size, and frame rate. Apple ProRes includes the following formats. Apple ProRes codecs take full advantage of multicore processing and feature fast, reduced-resolution decoding modes.Īll Apple ProRes codecs support all frame sizes (including SD, HD, 2K, 4K, and 5K) at full resolution. As per Apple’s website,Īpple ProRes codecs provide an unparalleled combination of multistream, real-time editing performance, impressive image quality, and reduced storage rates. FFmpeg to Convert to Apple ProRes 4444 FormatĪpple ProRes is a high quality, lossy video codec developed by Apple.Encoding Apple ProRes 422 HQ using FFmpeg.
0 Comments
Leave a Reply. |