As you can see libx265 does not yet support alpha. If it supported alpha it would have pixel format with an a in the name, such as yuva420p or rgba. Supported pixel formats: yuv420p yuvj420p yuv422p yuvj422p yuv444p yuvj444p gbrp yuv420p10le yuv422p10le yuv444p10le gbrp10le yuv420p12le yuv422p12le yuv444p12le gbrp12le gray gray10le gray12le Checking if an encoder supports alpha / transparency $ ffmpeg -h encoder=libx265 This answer may become outdated due to continuous developments, so make sure to research the current situation. See ffmpeg -h encoder=hevc_videotoolbox for more info. The "HEVC Video with Alpha" profile will only be used when the -alpha_quality value is not 0 (default is 0, range 0-1.). Features Overview Provides next-generation compression and codec. This has been updated after FFmpeg 4.3 was released, so you'll have to use a build from the current git branch, or wait for 4.4.Įxample command adapted from the relevant commit: ffmpeg -i input%03d.png -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 0.75 -vtag hvc1 output.mov x265 is a free software library and application for encoding video streams into the H.265/MPEG-H HEVC compression format, and is released under the terms of the GNU GPL. Convert to DXV with Alley 2.0 Resolume Alley is a super quick lightweight video player and video converter. There is a useless codec pack with extreme low reviews that I downloaded in the Microsoft store but that didn't take effect whatsoever. But now after the factory reset, the files are now no longer unreadable. This is a hardware accelerated encoder for Apple hardware. We have created a set of Adobe DXV exporter & importer plugins that enable rendering with the DXV codec in Adobe Premiere Pro, Media Encoder and After Effects. Successfully opened with Windows Media Player, Windows 10 Movies app and even VLC. It supports 7 HEVC/H.265 external encoders (most are hardware based) including libx265 which does not currently support alpha.Īs of now only the VideoToolbox HEVC Encoder ( -c:v hevc_videotoolbox) supports alpha. VideoToolbox supports alpha / transparencyįFmpeg does not have its own HEVC/H.265 encoder.
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