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Stuttering and Software Encoding TV cards
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<blockquote data-quote="Hivanoe" data-source="post: 97830" data-attributes="member: 27053"><p>I have Nvidia geforce 6200a AGP, (DX9, VMR9, Purevideo).</p><p></p><p>The sw bundled with my TV card (FlyDVB Trio) records in MPEG2 (I'm sure) !</p><p>But, if I watch only, it uses acquired video uncompressed directly di the monitor; CPU load is an average 15-20% when watching.</p><p></p><p>It starts encoding only when I press RECORD, in that situation (recording and watching) CPU usage goes to 90-95% (P4 2.4Ghz)</p><p></p><p>MP, with my CPU, cannot do the same thing at the same time, For me because it encode/decode MPEG2. The bundled other TV app doesn't <u>decode </u>the just MPEG2 encoded stream, it continue using the uncompressed video (before the encoding step)</p><p></p><p>This is what I think:</p><p></p><p><span style="font-family: 'Courier New'"></span></p><p><span style="font-family: 'Courier New'"><strong>MP (CPU load 100%, stuttering)</strong></span></p><p><span style="font-family: 'Courier New'">-------------- . . . -------- . . . .--------</span></p><p><span style="font-family: 'Courier New'">|Uncompressed.|. . .|Encoding| . . .|decoding|</span></p><p><span style="font-family: 'Courier New'">|video. . . . |---->|to MPEG2|----->|MPEG2...|----> <u>show video to Monitor</u></span></p><p><span style="font-family: 'Courier New'">-------------- . . . -------- . . . .--------</span></p><p><span style="font-family: 'Courier New'">. . . . . . . . . . . .|</span></p><p><span style="font-family: 'Courier New'">. . . . . . . . . . . .V </span></p><p><span style="font-family: 'Courier New'">. . . . . . . . . <u>record to disk</u></span></p><p><span style="font-family: 'Courier New'"> </span></p><p><span style="font-family: 'Courier New'"></span></p><p><span style="font-family: 'Courier New'"><strong>Bundled TV card software (CPU 90%, no stuttering)</strong></span></p><p><span style="font-family: 'Courier New'">------------- . . . -------- </span></p><p><span style="font-family: 'Courier New'">|Uncompressed|. . .|Encoding|</span></p><p><span style="font-family: 'Courier New'">|video . . . |---->|to MPEG2|----> <u>record to disk</u></span></p><p><span style="font-family: 'Courier New'">------------- . . . -------- </span></p><p><span style="font-family: 'Courier New'">. . .|</span></p><p><span style="font-family: 'Courier New'">. . .V</span></p><p><span style="font-family: 'Courier New'">. <u>show video to Monitor</u></span></p><p><span style="font-family: 'Courier New'"></span></p><p></p><p>There may be a 10-15% CPU load difference between the two methods ... related to CPU power !</p><p></p><p>It's true that an hardware encoding card whould be better ...</p><p>But with the growing cpu power ... and digital TV becoming more popular ... what's the future of analog hardware encoding ?</p><p></p><p>Now .. if I want more than 352x288 resolution on analog TV I need an hardware encoding card ... or a new CPU !</p><p></p><p>Thank you for your reply.</p><p>Bye</p></blockquote><p></p>
[QUOTE="Hivanoe, post: 97830, member: 27053"] I have Nvidia geforce 6200a AGP, (DX9, VMR9, Purevideo). The sw bundled with my TV card (FlyDVB Trio) records in MPEG2 (I'm sure) ! But, if I watch only, it uses acquired video uncompressed directly di the monitor; CPU load is an average 15-20% when watching. It starts encoding only when I press RECORD, in that situation (recording and watching) CPU usage goes to 90-95% (P4 2.4Ghz) MP, with my CPU, cannot do the same thing at the same time, For me because it encode/decode MPEG2. The bundled other TV app doesn't [U]decode [/U]the just MPEG2 encoded stream, it continue using the uncompressed video (before the encoding step) This is what I think: [FONT="Courier New"] [B]MP (CPU load 100%, stuttering)[/B] -------------- . . . -------- . . . .-------- |Uncompressed.|. . .|Encoding| . . .|decoding| |video. . . . |---->|to MPEG2|----->|MPEG2...|----> [U]show video to Monitor[/U] -------------- . . . -------- . . . .-------- . . . . . . . . . . . .| . . . . . . . . . . . .V . . . . . . . . . [U]record to disk[/U] [B]Bundled TV card software (CPU 90%, no stuttering)[/B] ------------- . . . -------- |Uncompressed|. . .|Encoding| |video . . . |---->|to MPEG2|----> [U]record to disk[/U] ------------- . . . -------- . . .| . . .V . [U]show video to Monitor[/U] [/FONT] There may be a 10-15% CPU load difference between the two methods ... related to CPU power ! It's true that an hardware encoding card whould be better ... But with the growing cpu power ... and digital TV becoming more popular ... what's the future of analog hardware encoding ? Now .. if I want more than 352x288 resolution on analog TV I need an hardware encoding card ... or a new CPU ! Thank you for your reply. Bye [/QUOTE]
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