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= htcdream =
= htcdream =
Revision as of 16:18, 14 August 2010
Not a proper 'app' page, just an overview
Problems with playing videos? - The kernel is now (July 2010) configured to use kernel-mode switching (kms) for glamo. The glamo video driver has no direct control over glamo anymore and cannot use accelerated video playing until a new driver is written.
It plays mpeg-4 640x240 with 24fps stretched fullscreen, however other formats will require transcoding.
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
This only applies to GTA02 hardware which uses Glamo graphical chip.
First of all you'll need special version of Mplayer with glamo support.
You can download it from here: http://downloads.tuxfamily.org/3v1deb/openmoko/mplayer-glamo.tar.bz2
Just copy files inside the archive with:
cp mplayer /usr/bin/mplayer cp input.conf ~/.mplayer/input.conf
opkg install ffmpeg
Than create ~/.mplayer/config file like this:
vo=xover:glamo,x11 display=:0 afm=ffmpeg, fs=1 quiet=1 osdlevel=0 noautosub=1 stop-xscreensaver=1
File shoud be preencoded with something like this:
mencoder file_to_encode.avi -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 \ -vf scale=320:240,eq2=1.2:0.5:-0.25,rotate=2 -oac mp3lame -ofps 15 -lameopts br=64:cbr \ -o file_for_openmoko
It can be played with:
Please refer to: http://unadventure.wordpress.com/2008/06/08/accelerating-in-my-pocket/ for more details.
- I gave a try to the above how-to and it doesn't work on my FR. Playing the preencoded movie just displays a green screen with garbage on the top. -- Pini Sun Dec 7 13:08:42 UTC 2008
Controlling MPlayer from the Touchscreen
Create a file in /home/root/.mplayer/input.conf with this content:
# Freerunner Optimizations MOUSE_BTN0 vo_fullscreen MOUSE_BTN0_DBL q
Now, you can toggle the fullscreen by tapping the screen and exit from mplayer by touble-tapping the LCD. Accelerometers or hardware buttons could help more.
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.
Another derivated method : works like a charm for me !
No ssh, no xrandr, no script needed, juste mplayer and qwerty keyboard : Like it's said in the "Getting started with FreeRunner" wiki page, you have to install the full qwerty keyboard, see these instructions. After that, you can go to Terminal and type : mplayer vid/my_video.avi Mplayer starts in full screen, if your video is optimized like below 240x320 it's work like a charm and to quit just use the power button.
Only issue : You can't forward/backward/pause...
Example - Big Buck Bunny
Download the source (no need to start with the giant full resolution version)
cd /tmp wget http://proyectos.pixelamigo.com/open/movies/BigBuckBunny/unofficial_PSP/big_buck_bunny_480p_AVC_FW33.mp4
Test the video filter settings (-vf crop=...) often omitting the last "rotate=2" (Optional, but recommended for long videos).
mplayer big_buck_bunny_480p_AVC_FW33.mp4 -vf crop=720:480:-1:-1,scale=320:-2,rotate=2 -zoom
mencoder big_buck_bunny_480p_AVC_FW33.mp4 -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=300 \ -vf crop=720:480:0:0,scale=320:-2,eq2=1.2:0.5:-0.25,rotate=2 -oac mp3lame -lameopts br=64:cbr \ -o big_buck_bunny_320.avi
or if it doesn't work (for me the image and the colours aren't ok) replace scale=320:-2 by scale=320:240
Transfer the resulting 27M file from the PC to the FreeRunner's MicroSD card scp firstname.lastname@example.org:/tmp/big_buck_bunny_320.avi /media/card
Play it /home/root/vidplay /media/card/big_buck_bunny_320.avi
To rotate the screen: xrandr -o 0 xrandr -o 1
Video is problematic on Neo 1973.
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.
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.
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
echo normal > /sys/devices/platform/s3c24xx-spi-gpio.1/spi0.0/state && fbset vga && chvt 3
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
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
The htcdream is capable of playing a video like big buck bunny,full screen,with only the CPU(we didn't investigate video/audio decoding offload) To encode the video use that command:
mencoder ../big_buck_bunny_1080p_h264.mov -oac mp3lame -lameopts cbr:br=64 -ovc lavc -lavcopts vcodec=mpeg1video:vbitrate=300 -vf scale=480:320,rotate=1,format=fmt=yv12 -srate 8000 -o bbb.mkv
The important part are:
- -srate 8000 :
That prevent most of the buffer underruns and make the sound nearly prefect
- low bit rates,mpeg1video etc... :
That lower the CPU usage....until less than 80% usage
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
nota: I have written a GUI called videoconverto to transcode and transfert the result file to the FR. You can find it at http://dl.free.fr/bhZK4uQzw just copy to your PC, and make it executable. --Piratebab 18:43, 28 June 2009 (UTC)
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.
Some hints on encoding for Neo Freerunner
- use a mpeg4 codec like in lavc (mencoder -avc lavc -lavcopts vcodec=mpeg4)
- the video should be pre-rotated (mencoder -vf rotate=1 or 2)
- the resolution should/must be
- divisible by 16 (-vf scale=m*16:n*16)
- x*y= about 150k, some videos even work with 200k (-vf scale=512:384 #=196608)
- x/y should be lower than 640/480
- if the video is scaled up to more than 640/480, maybe because of the aspect (-lavcopts autoaspect), video will get slow (sometime up to 684 may work)
- scaling up seems to be easy for the Glamo
- video bitrates up to 1000kbit (or more) may work, 400kbit seems to be safe (mencoder -lavcopts vbitrate=400)
- 3.6M pixels per second are possible, 640*240*24=3,686,400 (at least, when video is pre-rotated)
Source Code released: No
As a nice GUI gnome-mplayer can be recommended.
On Debian you can install it from repository:
- apt-get install gnome-mplayer
The popular command line video player.
Source Code released: Yes
It provides another GUI to mplayer.
It was released first there: http://people.defora.org/~khorben/share/Openmoko/deforaos-player_0.1.0_armv4t.ipk
The DeforaOS media player, a frontend to mplayer