Potřebuji poradit ohledně bitrate zvuku – ripuji dvd přes megui a nejsem si jist, na kolik můžu nastavit bitrate zvuku, aby znatelně neklesla kvalita. Používam Nero AAC a average bitrate. Taky by mě zajímalo, jak moc by se mělo lišit bitrate pro 2 a 6 channel. (Zatím používám bitrate kolem 150 kbps – vyhovuje mi celkovou velikostí souboru.) (Jsem myslel, že AAC má lepší kompresní poměr – stejná kvalita jako ac3 při nižším bitrate … při bitrate 384 na šestikanál a dvě zvukové stopy mi zvuk zabere polovinu toho, co video a to bych chtěl spíš míň … (všiml jsem si, že u klasických 700MB divx xvid ripů je mp3 o 128 kbps / 2ch /1 stopa). Původní stopy určitě nechávat nechci – dost často maj okolo 350 MB a to dělá 700MB zvuku oproti cca 900MB videa a to mi příjde dost zbytečné, originální stopy v ac3 nebo dts nechávám pouze u koncertů nebo muzikálů. Potřebuji najít správný poměr mezi velikostí a bitrate – potažmo i kodek. Rozhodně bych nechtěl, aby bitrate na 1 stopu přsahl 400kbps. Máte zkušenosti s tím, kolik se da ubrat, aby to nešlo moc ve finále poznat? – sám nerozeznám rozdíl mezi originální stopou 640 kbps v ac3 a mp3 128 kbps, ale občas, když si pustím originální dvd s kvalitními repro, tak mě ten zvuk “dostane” víc než u ripu…)
Díky za rady a názory.
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Re: bitrate zvuku
Já dávám na seriály a obyč filmy stereo 160 kbps do MP3 a stačí to. 128 kbps se mi zdá málo. Hledat náhradu za mp3 je imho zbytečné, rozdíly nejsou markantní. A 6kanálu je to ale horší, tam bude prostě AC3 vždy větší…
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