USING ADOBE MEDIA ENCODER CS4

Video and audio basics

Last updated 4/29/2012

Adjust your compression settings If you compress footage and it looks great, try changing your settings to reduce the

file size. Test your footage, and modify it until you find the best setting possible for the video you are compressing. All

video has varying attributes that affect compression and file size; each video needs its own setting for the best results.

Limit effects and rapid movement Limit movement if you are concerned about file size. Any movement, particularly

with many colors, increases file size. Shaky camera work and zooms are particularly bad in this regard. Some effects

increase file size because of the information they add to the video. On the other hand, some effects, such as blurs, can

be used to decrease the number of bits in a compressed file.

Choose appropriate dimensions If your target audience has a slow Internet connection (such as phone modems),

make the dimensions of your video smaller, such as 160x120 pixels. If your audience has fast connections, you can

make your dimensions larger (for example, 320x240 pixels).

Select an appropriate frame rate Frame rate indicates frames per second (fps). If you have a higher bitrate clip, a lower

frame rate can improve playback through limited bandwidth. For example, if you are compressing a clip with little

motion, cutting the

frame rate in half probably saves you only 20% of the bitrate. However, if you are compressing

high-motion video, reducing the frame rate has a much greater effect on the data rate.

Because video looks much better at native frame rates, leave the frame rate high if your delivery channels and playback

platforms allow. For web delivery, get this information from your hosting service. For mobile devices, use the device-

specific encoding presets, and the device emulator available through Adobe

Media Encoder. If you must reduce the

frame rate, the best results come from dividing the frame rate by whole numbers.

Note: When creating video for Flash, if you are creating a SWF file with embedded video, the frame rate of the video clip

and the SWF file must be the same. If you use different frame rates for the SWF file and the embedded video clip, playback

is inconsistent.

Choose an appropriate number of key frames Each key frame is a frame that draws when the video is compressed, so

the more frequent your key frames are the better quality the footage is. More key frames also mean a larger file size. If

you choose 30, a video key frame draws every 30 frames. If you choose 15, the quality is higher because a key frame

draws ever 15 frames and the pixels in your footage are more accurate to the original.

Reduce noise Noise (scattered pixels in your footage) increases file size. Reduce noise using your video editor, to

reduce the video file size. Using more solid colors in your video reduces its file size. You can use the Gaussian blur filter

to help reduce noise.

Compression tips for audio files

The same considerations exist for audio production as for video production. To achieve good audio compression, you

must begin an audio file that is free of distortion and audible artifacts introduced from the source recording. If you are

encoding material from a CD, try to record the file using direct digital transfer rather than the analog input of a sound

card. The sound card introduces an unnecessary digital-to-analog and analog-to-digital conversion that can create

noise in your transferred audio. Direct digital transfer tools are available for both Windows and Macintosh platforms.

If you must record from an analog source, use the highest quality sound card available.

Note: If your source audio file is monaural (mono), it is recommended that you encode in mono for use with Flash. If you

are encoding with Adobe

Media Encoder, and using an encoding preset, be sure to check if the preset encodes in stereo or

mono, and select mono if necessary.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 44 45

Komentarze do niniejszej Instrukcji

Brak uwag

Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte manuales

Manuales del propietario y guías del usuario para Accesorios para eléctrica Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte.
Ofrecemos 1 manuales en pdf Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte para descargar gratis por tipos de documentos: Manual de usuario

Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte Manual de usuario (2 paginas)

Marca: Erico | Categoria: Accessories for electrical | Tamaño: 0.16 MB |

Tabla de contenidos

SBC105R Mold

Assembly with

Quick Grip

Extension Clamp

Assembly with Quick

Grip Extension Clamp

Más productos y manuales para Accesorios para eléctrica Erico

Modelos	Tipo de documento
IP7500 Cable to Bus, Horizontal Splice to Lug	Manual de usuario ERICO IP7500 Cable to Bus, Horizontal Splice to Lug User Manual, 1 paginas
IIP7461 Cable to Lug Horizontal Tap Perpendicular	Manual de usuario ERICO IIP7461 Cable to Lug Horizontal Tap Perpendicular to Flange User Manual, 1 paginas
IP7509 HV Type	Manual de usuario ERICO IP7509 HV Type User Manual, 1 paginas
IP7545 Cable to Lug Horizontal Tap Perpendicular t	Manual de usuario ERICO IP7545 Cable to Lug Horizontal Tap Perpendicular to Flange User Manual, 1 paginas
IP7666 Cable to Ground Wire	Manual de usuario ERICO IP7666 Cable to Ground Wire User Manual, 1 paginas
IP7717 Horizontal Splice, Single to Multiple Cable	Manual de usuario ERICO IP7717 Horizontal Splice, Single to Multiple Cable User Manual, 1 paginas
IP7674 PBC105Q Quick Grip Clamp	Manual de usuario ERICO IP7674 PBC105Q Quick Grip Clamp User Manual, 1 paginas
IP7947 Rail Girder Connection	Manual de usuario ERICO IP7947 Rail Girder Connection User Manual, 1 paginas
IP7748 Cable to Lug Horizontal Tap Perpendicular t	Manual de usuario ERICO IP7748 Cable to Lug Horizontal Tap Perpendicular to Flange User Manual, 1 paginas
IP8006 Stud to Web of Rail	Manual de usuario ERICO IP8006 Stud to Web of Rail User Manual, 1 paginas
IP8007 Horizontal Tap Perpendicular to Flange	Manual de usuario ERICO IP8007 Horizontal Tap Perpendicular to Flange User Manual, 1 paginas
IP8021 Horizontal Tap to Rail Web	Manual de usuario ERICO IP8021 Horizontal Tap to Rail Web User Manual, 1 paginas
IP8050 715066 Double Rail Contact Assembly	Manual de usuario ERICO IP8050 715066 Double Rail Contact Assembly User Manual, 1 paginas
IP8274 ERICO CADWELD Bus to Horizontal Steel, Tap	Manual de usuario ERICO IP8274 ERICO CADWELD Bus to Horizontal Steel, Tap Flat Style CG User Manual, 1 paginas
TDSGAWB Series Grounding Bus	Manual de usuario ERICO TDSGAWB Series Grounding Bus User Manual, 1 paginas
Type RX Connection	Manual de usuario ERICO Type RX Connection User Manual, 1 paginas
Type PL Connection Grounding	Manual de usuario ERICO Type PL Connection Grounding User Manual, 1 paginas
DAR 275V	Manual de usuario ERICO DAR 275V User Manual, 2 paginas
DSD120 Series DIN Surge Diverter	Manual de usuario ERICO DSD120 Series DIN Surge Diverter User Manual, 1 paginas
CRITEC SES65 240 AC Panel Protector	Manual de usuario ERICO CRITEC SES65 240 AC Panel Protector User Manual, 4 paginas

Adobe Media Encoder CS4 Instrukcja Użytkownika Strona 13

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Oprogramowanie Adobe Media Encoder CS4

Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte manuales

Erico IP7451A SBC105R Mold Assembly with Quick Grip Exte Manual de usuario (2 paginas)

Tabla de contenidos

Más productos y manuales para Accesorios para eléctrica Erico