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di default quicktime registra in mov e si producono filmati molto pesanti! Si può ridurre la qualità audio e video? Nelle opzioni non ho trovato nulla... occorre cercare qualche altro programma di registrazione schermo più professionale? Grazie
On what model Mac are you making these recordings? Identify the model of your Apple device - Apple Support
What is the version macOS on that computer? Find out which macOS your Mac is using - Apple Support
To reduce the size (and thereby the quality) of QuickTime screen recording movies, you would have to re-encode the existing movie at lower quality. Depending on how powerful the Mac is, that may take some time. HandBrake is a often recommended tool for re-encoding movies with different parameters.
For any movie (every source) this is true: file size = bitrate × duration. Duration is simple: shorter movie clips are smaller in size, and near-linearly. Bitrate is a combination of frame size, frame rate, and codec efficiency. While bitrate is often not exactly constant, it is quite predictable with averages. Most users want to keep frame rate as-is, or else you loose fluid motion. For codec efficiency, H.265 HEVC creates smaller movies than H.264 AVC — if the playback device is compatible.
Audio is very compact compared to video, so don’t worry about that too much, although you can save a bit there as well, if you must.
To give more concrete advise, please answer these:
You can also explore other screen recording applications, to see what settings for quality those provide. It would be different, but not necessarily better. I have no advise for that, though. Maybe someone else here does?
On what model Mac are you making these recordings? Identify the model of your Apple device - Apple Support
What is the version macOS on that computer? Find out which macOS your Mac is using - Apple Support
To reduce the size (and thereby the quality) of QuickTime screen recording movies, you would have to re-encode the existing movie at lower quality. Depending on how powerful the Mac is, that may take some time. HandBrake is a often recommended tool for re-encoding movies with different parameters.
For any movie (every source) this is true: file size = bitrate × duration. Duration is simple: shorter movie clips are smaller in size, and near-linearly. Bitrate is a combination of frame size, frame rate, and codec efficiency. While bitrate is often not exactly constant, it is quite predictable with averages. Most users want to keep frame rate as-is, or else you loose fluid motion. For codec efficiency, H.265 HEVC creates smaller movies than H.264 AVC — if the playback device is compatible.
Audio is very compact compared to video, so don’t worry about that too much, although you can save a bit there as well, if you must.
To give more concrete advise, please answer these:
You can also explore other screen recording applications, to see what settings for quality those provide. It would be different, but not necessarily better. I have no advise for that, though. Maybe someone else here does?
Prima di tutto grazie! Stiamo riducendo i file mov in mp4 secondo i tuoi consigli con HandBrake e tutto funziona. Registriamo dei seminari della durata di 1h/1,5h (quindi risultano molto pesanti!) e per ora li teniamo da parte: in futuro ne estrarremo delle parti per fare video su YouTube. In effetti non ci servirebbe avere un originale in mov, quindi se trovassimo un programma di registrazione schermo che ci permette d scegliere il formato eviteremmo i lunghi tempi per la riduzione. Per quanto riguarda i dispositivi: ho un nuovo Macbook Air M2 ma faccio queste registrazioni con il mio precedente Macbook del 2017 (MacBookPro14,3, 3,1 GHz Intel Core i7 quad-core, 16 GB di Memoria), naturalmente aggiornato con Ventura 13.3.1 (a). Ancora grazie! e ciao
If you upload to YouTube, then the format or file size doesn’t matter much. YouTube will accept many formats, and re-encode (convert) uploaded videos automatically to various resolution sizes and qualities.
come posso modificare la qualità delle registrazioni schermo in quicktime player
