2010-11-25 00:58:05     ffmpeg linux problem

2010-11-25 00:58:05     ffmpeg linux problem

haiqing cao (CHINA)

Message: 96189   

root:/> ffmpeg -f video4linux -r 10.0 -s 720x288 -i /dev/video0 -qscale 6 -f mjp

eg foo

FFmpeg version UNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.

  confi:uration: --prefix=/usr --source-path=/opt/uClinux-dist/lib/ffmpeg/build/../ffmpeg-svn-11114 --target-os=Linux --cpu=bfin --arch=bfin --extra-ldflags=    -mcpu=bf561-0.3 --enable-static --enable-shared --enable-gpl --enable-pp --disable-strip --cross-prefix=bfin-linux-uclibc-

  libavutil version: 49.5.0

  libavcodec version: 51.48.0

  libavformat version: 52.1.0

  built on Nov 25 2010 13:33:18, gcc: 4.1.2 (ADI svn)

couldn't allocate bottom buffer - kernel start address too low

[video4linux @ 0xfb075c]/dev/video0: Cannot allocate memory

/dev/video0: I/O error occured

Usually that means that input file is truncated and/or corrupted.

I don't know how to result this problem ,so can you help me?

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2010-11-25 02:08:29     Re: ffmpeg linux problem

Mike Frysinger (UNITED STATES)

Message: 96190   

the output told you the problem:

    couldn't allocate bottom buffer - kernel start address too low

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2010-11-30 00:58:55     Re: ffmpeg linux problem

HappyBlackfin Blackfin (CHINA)

Message: 96304   

The default kernal start from: 0x1000

Pls modify the :

Board cunstomizations

  (0x1000) Kernal load address for booting

  0x1000 to 0x100000

I'm working on Blackfin & ADV7183B. Let us go forward together.

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2010-11-30 02:57:35     Re: ffmpeg linux problem

haiqing cao (CHINA)

Message: 96308   

thank you , I work on the adv7183B too . I want to use ffmpeg to capture an image from the video ,but it is stop like this

root:/dev> ffmpeg -f video4linux -r 10.0 -s 720x288 -i /dev/video0 -qscale 6 -f

mjpeg foo

FFmpeg version UNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.

  configuration: --prefix=/usr --source-path=/opt/uClinux-dist/lib/ffmpeg/build/../ffmpeg-svn-11114 --target-os=Linux --cpu=bfin --arch=bfin --extra-ldflags=    -mcpu=bf561-0.3 --enable-static --enable-shared --enable-gpl --enable-pp --disable-strip --cross-prefix=bfin-linux-uclibc-

  libavutil version: 49.5.0

  libavcodec version: 51.48.0

  libavformat version: 52.1.0

  built on Nov 19 2010 21:22:55, gcc: 4.1.2 (ADI svn)

do you have this problem?

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2011-08-30 04:27:48     May be you set a error PPI

Fangbo LI (CAPE VERDE)

Message: 103198   

I work on ADV7181B,and at first i met  the same problem too.At end ,i found that i set a error PPI ,It should be set to PPI0,but i set to PPI1,so when use ffmpeg command ,the error occured.

So ,try to check if you set the right PPI,and set correct PPI in the make menuconfig.