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Stuttering and Software Encoding TV cards
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<blockquote data-quote="Hivanoe" data-source="post: 97802" data-attributes="member: 27053"><p>Hi all,</p><p></p><p>this may be not new for someone, but I didn't read this on documentation ...</p><p></p><p>With software encoding TV tuners (the supported types) , when you watch analog channels (not recording or timeshifting), MP <u>encode the analog signal to MPEG2</u> anyway, than it decode the stream again to show it on the monitor screen.</p><p></p><p>I read on DOC that a P4 2.8Ghz is required for software encoders ... but I supposed "... if you want to record or timeshift", instead such CPU is also required if you want to <u>watch only </u>:</p><p></p><p>I have a Pentium4 2.4Ghz with stuttering problem on analog TV channels:</p><p>With TV capture resolution to 720x576 (PAL on my country) MP cannot encode and decode the signal again ... so I have stuttering problems (CPU at 100%)!</p><p>By changing TV capture resolution to 352x288 (CIF) my CPU can do the job at 60% load ... so I have NO STUTTERING ! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /> </p><p></p><p>So, not a codec problem, or vga drivers, XP patch ... but CPU power limit <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> .</p><p></p><p>Attention, this is not a "real problem" ... it's the MP approach to "software encoding tv cards".... you need a really fast CPU !</p><p></p><p>The TV software that came with my tv adapter works PERFECT with my CPU ...</p><p>This is possible: because such software capture the analog signal and send it directly to LCD monitor UNCOMPRESSED, without the MPEG2 encoding step.</p><p></p><p>My question is: can MP handle the Analog signal without compressing it to MPEG2 ?</p><p>I think no....</p><p>I tried to change filters connections to skip the encoder ... not successful, I think MP needs an MPEG2 stream.</p><p></p><p>Bye.</p></blockquote><p></p>
[QUOTE="Hivanoe, post: 97802, member: 27053"] Hi all, this may be not new for someone, but I didn't read this on documentation ... With software encoding TV tuners (the supported types) , when you watch analog channels (not recording or timeshifting), MP [U]encode the analog signal to MPEG2[/U] anyway, than it decode the stream again to show it on the monitor screen. I read on DOC that a P4 2.8Ghz is required for software encoders ... but I supposed "... if you want to record or timeshift", instead such CPU is also required if you want to [U]watch only [/U]: I have a Pentium4 2.4Ghz with stuttering problem on analog TV channels: With TV capture resolution to 720x576 (PAL on my country) MP cannot encode and decode the signal again ... so I have stuttering problems (CPU at 100%)! By changing TV capture resolution to 352x288 (CIF) my CPU can do the job at 60% load ... so I have NO STUTTERING ! :o So, not a codec problem, or vga drivers, XP patch ... but CPU power limit ;) . Attention, this is not a "real problem" ... it's the MP approach to "software encoding tv cards".... you need a really fast CPU ! The TV software that came with my tv adapter works PERFECT with my CPU ... This is possible: because such software capture the analog signal and send it directly to LCD monitor UNCOMPRESSED, without the MPEG2 encoding step. My question is: can MP handle the Analog signal without compressing it to MPEG2 ? I think no.... I tried to change filters connections to skip the encoder ... not successful, I think MP needs an MPEG2 stream. Bye. [/QUOTE]
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