Video Player

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(Playback)
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==Playback==
 
==Playback==
The default media player doesn't seem to handle video very well, but mplayer does OK. It can be installed with the following command:
+
The default media player doesn't seem to handle video very well, but mplayer does OK.
 +
 
 +
=== Using standard Mplayer ===
 +
It can be installed with the following command:
 
  opkg install mplayer
 
  opkg install mplayer
 +
 +
=== Using the Glamo XV acceleration ===
 +
TBD, refer to: http://unadventure.wordpress.com/2008/06/08/accelerating-in-my-pocket/
 +
 +
=== Playback helper script ===
  
 
Create a script named 'vidplay' in your home directory with the following commands:
 
Create a script named 'vidplay' in your home directory with the following commands:

Revision as of 03:14, 14 July 2008

Not a proper 'app' page, just an overview

Contents

FreeRunner

It plays mpeg-4 320x240 stretched fullscreen, however other formats will require transcoding.

Playback

The default media player doesn't seem to handle video very well, but mplayer does OK.

Using standard Mplayer

It can be installed with the following command:

opkg install mplayer

Using the Glamo XV acceleration

TBD, refer to: http://unadventure.wordpress.com/2008/06/08/accelerating-in-my-pocket/

Playback helper script

Create a script named 'vidplay' in your home directory with the following commands:

#!/bin/sh
xrandr -display :0 --output default --mode 240x320
mplayer -vo fbdev "$1" > /dev/null
xrandr -display :0 --output default --mode 480x640
reset

Make the script executable:

chmod 755 /home/root/vidplay

Known issues with this approach:

  • The output isn't in a proper window, so background stuff sometimes flickers through.
  • When done on the local terminal the keyboard is obscured so you can't exit. SSH works quite well.
  • 240x320 mode has some quirks:
    • The gamma/brightness/contrast is weird. Encoding adjustments into the media is a workaround.
    • Vertical banding (as seen in landscape position) is quite noticeable.
  • Using CTRL-C to exit vidplay doesn't reset the screen; use 'q' instead.

Despite these issues, it proves that the horsepower is there and it can be done.

Example - Big Buck Bunny

PC

Download the source (no need to start with the giant full resolution version)

cd /tmp
wget http://mirror.botux.net/pub/peach.blender/psp/big_buck_bunny_480p_AVC_FW33.mp4

Transcode it

mencoder big_buck_bunny_480p_AVC_FW33.mp4 -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=720:480:0:0,rotate=2,scale=-2:320,eq=1.2:0.5:-0.25 -oac mp3lame -lameopts br=64:cbr -o big_buck_bunny_320.avi

FreeRunner

Transfer the resulting 27M file from the PC to the FreeRunner's MicroSD card

scp user@192.168.0.200:/tmp/big_buck_bunny_320.avi /media/card

Play it

/home/root/vidplay /media/card/big_buck_bunny_320.avi

Now go outside and play; you've been spending too much time at the computer.

Other Info

To rotate the screen:

xrandr -o 0
xrandr -o 1

Neo1973

Video is problematic on GTA01.

On the minus side.

  • The CPU is certainly not fast enough to decode 480*640 video.
  • The display is portrait, which means that an additional rotation step is needed for most landscape video, adding to CPU usage.
  • Downloading an arbitrary video, and playing it without transcoding it, then playing it later will not be possible.

However.

On the positive side.

  • The LCD can be switched to a 240*320 stretch mode, which is much less taxing.
  • Re-encoding video to rotate it, and scale to 320*240, and encoding with a low CPU use codec such as MPEG-1 may well make half-screen doubled videos playable at 25fps.
  • If not, then it almost certainly will be possible at 12fps.

Mode Switching

For switching between QVGA and VGA mode do the following with a compatible kernel:

chvt 4 && echo qvga-normal > /sys/devices/platform/s3c24xx-spi-gpio.1/spi0.0/state && fbset qvga

vice versa:

echo normal > /sys/devices/platform/s3c24xx-spi-gpio.1/spi0.0/state && fbset vga && chvt 3

taken from http://lists.openmoko.org/pipermail/neo1973-hardware/2007-October/000267.html

To avoid console blanking type

echo -e '\033[9;0]' > /dev/ttyX

where 'X' is your terminal number - for example if you did chvt 4 then /dev/tty4 is your terminal.

To avoid kernel output in vt do

echo 0 > /proc/sys/kernel/printk

User Reports

From a conversation with XorA, in the IRC channel.

400kbps mpeg4 works on a 200Mhz neo (without sound) on prerotated 240*320 ffmpeg codec videos, at 25fps, using stock mplayer.

With sound, this drops to 18fps.

There are optimisations for mplayer that look promising to get 25fps with sound.

Playback using 480x640 / 640x480

To get best speed on GTA01 (best size-speed-resolution-codec trade-off I could find - doesn't mean it's perfect though) crosscode using:

mencoder <sourcefile> -o <targetfile.avi> -ofps 13 -vf scale -zoom -xy 240 -af channels=1:0:0:1:0 -oac lavc -ovc lavc -lavcopts acodec=mp3:vcodec=h263p:autoaspect=1:vbitrate=300:abitrate=32

Also working okay:

mencoder <sourcefile> -o <targetfile.avi> -ofps 13 -vf scale -zoom -xy 352 -af channels=1:0:0:1:0 -oac lavc -ovc lavc -lavcopts acodec=mp3:vcodec=h263p:autoaspect=1:vbitrate=200:abitrate=32

You can playback the file using:

mplayer -sws 0 -nodouble -vo sdl -fs -framedrop <tagetfile.avi>

You may also want to use:

-autosync 30 -vf scale -zoom -xy 640 -vf rotate=1

Transcoding

To make your videos/DVDs compatible use mencoder like this: Find out the -vf cropping parameters with

mplayer input.avi -vf cropdetect

let it run a few seconds and insert the given cropping values into this command

mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=xx:xx:xx:xx,rotate=2,scale=-2:320 -oac mp3lame -lameopts br=64:cbr -o output2.avi

To encode a DVD first find out the -vf cropping parameters with

mplayer -dvd-device /path/to/dvd dvd:// -vf cropdetect -sb 50000000

let it run a few seconds and insert the given cropping values into this command

mencoder -dvd-device /path/to/dvd dvd:// -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=xx:xx:xx:xx,rotate=2,scale=-2:320 -oac mp3lame -lameopts br=64:cbr -o output.avi

This will rotate the video/DVD, scale it and encode it to mpeg4 with a bitrate of 300kBit/s. Works like a charm.

Personal tools

Not a proper 'app' page, just an overview

FreeRunner

It plays mpeg-4 320x240 stretched fullscreen, however other formats will require transcoding.

Playback

The default media player doesn't seem to handle video very well, but mplayer does OK.

Using standard Mplayer

It can be installed with the following command:

opkg install mplayer

Using the Glamo XV acceleration

TBD, refer to: http://unadventure.wordpress.com/2008/06/08/accelerating-in-my-pocket/

Playback helper script

Create a script named 'vidplay' in your home directory with the following commands:

#!/bin/sh
xrandr -display :0 --output default --mode 240x320
mplayer -vo fbdev "$1" > /dev/null
xrandr -display :0 --output default --mode 480x640
reset

Make the script executable:

chmod 755 /home/root/vidplay

Known issues with this approach:

  • The output isn't in a proper window, so background stuff sometimes flickers through.
  • When done on the local terminal the keyboard is obscured so you can't exit. SSH works quite well.
  • 240x320 mode has some quirks:
    • The gamma/brightness/contrast is weird. Encoding adjustments into the media is a workaround.
    • Vertical banding (as seen in landscape position) is quite noticeable.
  • Using CTRL-C to exit vidplay doesn't reset the screen; use 'q' instead.

Despite these issues, it proves that the horsepower is there and it can be done.

Example - Big Buck Bunny

PC

Download the source (no need to start with the giant full resolution version)

cd /tmp
wget http://mirror.botux.net/pub/peach.blender/psp/big_buck_bunny_480p_AVC_FW33.mp4

Transcode it

mencoder big_buck_bunny_480p_AVC_FW33.mp4 -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=720:480:0:0,rotate=2,scale=-2:320,eq=1.2:0.5:-0.25 -oac mp3lame -lameopts br=64:cbr -o big_buck_bunny_320.avi

FreeRunner

Transfer the resulting 27M file from the PC to the FreeRunner's MicroSD card

scp user@192.168.0.200:/tmp/big_buck_bunny_320.avi /media/card

Play it

/home/root/vidplay /media/card/big_buck_bunny_320.avi

Now go outside and play; you've been spending too much time at the computer.

Other Info

To rotate the screen:

xrandr -o 0
xrandr -o 1

Neo1973

Video is problematic on GTA01.

On the minus side.

  • The CPU is certainly not fast enough to decode 480*640 video.
  • The display is portrait, which means that an additional rotation step is needed for most landscape video, adding to CPU usage.
  • Downloading an arbitrary video, and playing it without transcoding it, then playing it later will not be possible.

However.

On the positive side.

  • The LCD can be switched to a 240*320 stretch mode, which is much less taxing.
  • Re-encoding video to rotate it, and scale to 320*240, and encoding with a low CPU use codec such as MPEG-1 may well make half-screen doubled videos playable at 25fps.
  • If not, then it almost certainly will be possible at 12fps.

Mode Switching

For switching between QVGA and VGA mode do the following with a compatible kernel:

chvt 4 && echo qvga-normal > /sys/devices/platform/s3c24xx-spi-gpio.1/spi0.0/state && fbset qvga

vice versa:

echo normal > /sys/devices/platform/s3c24xx-spi-gpio.1/spi0.0/state && fbset vga && chvt 3

taken from http://lists.openmoko.org/pipermail/neo1973-hardware/2007-October/000267.html

To avoid console blanking type

echo -e '\033[9;0]' > /dev/ttyX

where 'X' is your terminal number - for example if you did chvt 4 then /dev/tty4 is your terminal.

To avoid kernel output in vt do

echo 0 > /proc/sys/kernel/printk

User Reports

From a conversation with XorA, in the IRC channel.

400kbps mpeg4 works on a 200Mhz neo (without sound) on prerotated 240*320 ffmpeg codec videos, at 25fps, using stock mplayer.

With sound, this drops to 18fps.

There are optimisations for mplayer that look promising to get 25fps with sound.

Playback using 480x640 / 640x480

To get best speed on GTA01 (best size-speed-resolution-codec trade-off I could find - doesn't mean it's perfect though) crosscode using:

mencoder <sourcefile> -o <targetfile.avi> -ofps 13 -vf scale -zoom -xy 240 -af channels=1:0:0:1:0 -oac lavc -ovc lavc -lavcopts acodec=mp3:vcodec=h263p:autoaspect=1:vbitrate=300:abitrate=32

Also working okay:

mencoder <sourcefile> -o <targetfile.avi> -ofps 13 -vf scale -zoom -xy 352 -af channels=1:0:0:1:0 -oac lavc -ovc lavc -lavcopts acodec=mp3:vcodec=h263p:autoaspect=1:vbitrate=200:abitrate=32

You can playback the file using:

mplayer -sws 0 -nodouble -vo sdl -fs -framedrop <tagetfile.avi>

You may also want to use:

-autosync 30 -vf scale -zoom -xy 640 -vf rotate=1

Transcoding

To make your videos/DVDs compatible use mencoder like this: Find out the -vf cropping parameters with

mplayer input.avi -vf cropdetect

let it run a few seconds and insert the given cropping values into this command

mencoder input.avi -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=xx:xx:xx:xx,rotate=2,scale=-2:320 -oac mp3lame -lameopts br=64:cbr -o output2.avi

To encode a DVD first find out the -vf cropping parameters with

mplayer -dvd-device /path/to/dvd dvd:// -vf cropdetect -sb 50000000

let it run a few seconds and insert the given cropping values into this command

mencoder -dvd-device /path/to/dvd dvd:// -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 -vf crop=xx:xx:xx:xx,rotate=2,scale=-2:320 -oac mp3lame -lameopts br=64:cbr -o output.avi

This will rotate the video/DVD, scale it and encode it to mpeg4 with a bitrate of 300kBit/s. Works like a charm.