Kontron KTT20-pITX Manual do Utilizador descarregar pdf (Página 38)

KTD-S0045-D Page 34 Linux® BSP

KTT20/pITX Software Guide

9.2.2 Reencoding Examples

With the ffmpeg tool you can reencode video files which do not comply the criteria listed above.

Create H.264 baseline profile, avg bitrate 15 Mbps, peak bitrate 20 Mbps:

ffmpeg -y -i ./video.mov -vcodec libx264 -profile baseline -b 15M-maxrate 20M -bufsize 1830k

-acodec copy ./video_h264_max20_aver15.mov

Create Xvid, avg bitrate 8 Mbps, peak bitrate 10 Mbps:

ffmpeg -y -i ./video.mov -vcodec mpeg4 -vtag xvid -b 8M -maxrate 10M-bufsize 1830k

-acodec copy ./video_xvid_max10_aver8.avi

9.3 Audio Settings

If you have trouble with audio input/output please check the 'alsamixer' settings.

Examples with the command line tool 'amixer':

For an overview type amixer contents

To change a value type e.g. amixer cset numid=46 on

You can find some audio files in the directory

usr/share/sounds/... . Play these files with the 'aplay' tool,

for example

aplay ring.wav.

The following table gives an indication to solve the problem(s).

Control Name Value

1 Left Input PGA Switch

off

2 Left Input PGA Volume

3 Left Input PGA Common Mode Switch

off

4 Right Input PGA Switch

off

5 Right Input PGA Volume

6 Right Input PGA Common Mode Switch

off

7 ADC OSR

High performance

8 HPF Switch

off

9 HPF Mode

Hi-fi

10 DRC Switch

off

11 DRC Compressor Slope R0

1/16

12 DRC Compressor Slope R1

13 DRC Compressor Threshold Volume

124

14 DRC Volume

15 DRC Minimum Gain Volume

16 DRC Maximum Gain Volume

17 DRC Attack Rate

1.45ms

18 DRC Decay Rate

743ms

19 DRC FF Delay

9 samples

20 DRC Anticlip Switch

21 DRC QR Switch

22 DRC QR Threshold Volume

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 55 56

Comentários a estes Manuais

Sem comentários

Kontron KTT20-pITX Manual do Utilizador Página 38

Comentários a estes Manuais

Manuais e produtos relacionados com Hardware Kontron KTT20-pITX