> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Darren Wilkinson > Sent: Tuesday, April 15, 2008 4:47 PM > To: User discussion about IVTV > Subject: [ivtv-users] Converting FROM mpeg2 using 350's > onboard decoding > > > I'm considering buying the Hauppauge 350 to use as not only > as a capture > card but mainly to use the onboard mpeg2 decoder to speed up > transcoding > 720x576 "pal" recorded dvb and dvd streams to xvid. > > I'm using a low speed cpu due to wanting a silent setup. It is often > clocked as less than 1Ghz so I can turn the fan speeds down. > I want to > know if there is some app (preferrably for linux but not necessarily) > that can take the decoded stream and won't rely on being able to > re-encode in realtime to avoid dropped frames. > > Can anyone help? >
I am curious how the mpeg2 decoder could be used to speed up the tranformation to xvid. I guess that transcoders work something like this. Decode the input stream to some intermediate representation. Encode the intermediate representation to the output stream. The transcoder could go directly from one format to another but a ton more code would need to be written to support the same number of formats. If the input stream to the transcoder is close to the intermediate format then I guess you cut the software work down a reasonable amount. http://drdobbs.com/embedded/184411224 The article at the link above says that the itermediate format of ffmpeg is Rgba. It also says that the internal format for blender is not rgba. Also there are issues of audio video synchronization,decrypting the dvd and possibly Selecting the audio channels. Sounds like a fair bit of work even if the hardware supports it. Sincerely, [EMAIL PROTECTED] _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
