On Thu, Aug 25, 2005 at 08:09:48AM -0400, Matt Mousseau wrote: > What exactly happens when I tell myth to "transcode" a recording > from the Watch Recordings screen? Previously to re-encode files I > have used nuvexport, which I know is just a perl script that pulls > information about all your recordings from the database, checks > dependencies, and asks you how you want to re-encode specific files, > then launches ffmpeg. I'd like to utilize the built-in transcoder, > but I'm curious how it compares in speed to the nuvexport/ffmpeg > combo. > > Of course, I could have the complete wrong idea about how that > operates, soooo...can anybody give me some idea what happens when I > hit that little "X" key on my keyboard?
It will launch the internal "mythtranscode" transcoding program (which is different from the "mtd" MythDVD transcoding program) to transcode your TV recordings. Usually the motivation is to save space, but it can also be used to cut out commercials (but nuvexport can also respect the commercial cutlists). It differs from nuvexport in that nuvexport will create a new file for you (presumably for you to burn to DVD, or place in your permanent MythVideo collection), while mythtranscode will replace your original recording with the transcoded copy (by default; there is a backend option to preserve the original files as ".old" or something like that). I can't really compare with nuvexport; I used nuvexport once to burn a DVD of a program. Otherwise, I pretty much always use mythtranscode to save space. From the space-saving perspective, the only use I can really see for mythtranscode is to save space when you don't have a capture card that can do the desired transcoding at recording time. For example, I only have two HD-3000 cards (which do no encoding), so to save space I have to have them processed after the recording is finished. If you have the Hauppauge PVR-x50 cards or similar hardware, you should be able to just use the "Recording Profiles" to tell the PVR hardware to encode to the desired quality/disk-space profile; you shouldn't have to use mythtranscode. I think I've read somewhere on these lists that mythtranscode is optimized for speed (at cost of lower quality), while nuvexport is optimized for quality (at the cost of slower speed). But I don't know anything about that. --Rob
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