is UMS also a render itself?
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Re: is UMS also a render itself?
UMS isn't a renderer, a renderer must have playback capabilities. Most renderers are "hardware devices" in some shape or form.
I'm not sure why you'd want to play video on a RPi, is it at all up to the task? There aren't a lot of working software renderers, you'll find many (often abandoned) projects implementing some part of it, but there's nothing I've found yet I'd really recommend. I use software renderers for testing, and I primarily use Kodi. VLC also has some renderer capabilities, but both Kodi and VLC has a quite "shallow" implementation that doesn't support too much of what's in the standards. For audio I use foobar2000, which seems to have quite a decent audio renderer implementation.
MPlayer is only used to decode DVDs, although MEncoder is used for transcoding, just like FFmpeg and to some extent VLC. tsMuxeR can also be used for "transcoding", although only when only remuxing is needed and for certain codec/formats.
I'm not sure why you'd want to play video on a RPi, is it at all up to the task? There aren't a lot of working software renderers, you'll find many (often abandoned) projects implementing some part of it, but there's nothing I've found yet I'd really recommend. I use software renderers for testing, and I primarily use Kodi. VLC also has some renderer capabilities, but both Kodi and VLC has a quite "shallow" implementation that doesn't support too much of what's in the standards. For audio I use foobar2000, which seems to have quite a decent audio renderer implementation.
MPlayer is only used to decode DVDs, although MEncoder is used for transcoding, just like FFmpeg and to some extent VLC. tsMuxeR can also be used for "transcoding", although only when only remuxing is needed and for certain codec/formats.