mailto: blog -at- heyrick -dot- eu

Beagle xM video

The Beagle in use
[using my eeePC as a display, playing AKB48's Baby! Baby! Baby! video]

I conducted a few tests of video playback capabilities of the Beagleboard xM using default stuff and s-video output.

First up, we've already done H.263 (XviD/DivX). I've tried it in a variety of resolutions without problems, but didn't have any XviD HD material to hand.

Now for H.264 (so-called MPEG 4). The first test shouldn't be too hard. It is a 360p fan-made video for the song "Fairy Dreaming" which was the theme to "Genocyber", an animé from the days when gore was an artform. Forget logic, science, or basic biology - just go with something because it takes gory and turns it up to eleven...

Video test - gore-to-the-max
[Genocyber AMV from YouTube, NSFW!]

Next up was a 480p video for the song "Baby! Baby! Baby!" by AKB48. Initially this stuttered badly for the first 10-15 seconds, and then whenever the mouse was moved. My fault - explanation and resolution below.

Video test - AKB48
[Baby! Baby! Baby! video from YouTube, by AKB48]

Finally, a 720p recorded on my mobile phone. Wouldn't play. Not a hope. I'll need to rustle up some other HD files because I have a suspicion that this might be the fault of the MPlayer. I initially wondered if it was a side-effect of using the s-video port, but besides being a bogus reason, I also noticed that the video FPS (frame rate) is rather incorrect.

Video test - HD fail


How, in order to get the s-video port working, I had to modify the uEnv.txt file. I initially altered mine to be:

bootargs=console=${console} ${optargs} mpurate=${mpurate} buddy=${buddy} camera=${camera} vram=${vram} omapfb.mode=tv:ntsc omapdss.def_disp=${defaultdisplay} root=${mmcroot} rootfstype=${mmcrootfstype} omapdss.tvcable=composite
uenvcmd= run loaduimage; run mmcboot

The "defaultdisplay" and references to tv/composite are what do the trick.

However after some consideration with regards the original version of the file, I have amended it as follows:

console="tty0 console=ttyS2,115200n8"
bootargs=console=${console} ${optargs} mpurate=${mpurate} buddy=${buddy} camera=${camera} vram=${vram} omapfb.mode=tv:pal omapdss.def_disp=${defaultdisplay} root=${mmcroot} rootfstype=${mmcrootfstype} omapdss.tvcable=composite
uenvcmd= run loaduimage; run mmcboot
- copy'n'paste note: the line shown in blue is all one line, it is only split on your browser for wordwrapping

The vram setting defaults to zero. Setting this gives memory for the video system, which obviously makes video stuff more fluid. The mpurate setting should be auto-set by U-boot, maybe this is a hangover from a bug in an older version? I copied it from the original uEnv anyway.
The two console settings set up where you can bash command lines - a terminal switchable from the keyboard, plus the serial port. I think this was default anyway.
Finally, the optargs setting consoleblank to zero tells the system that you want to see all the boot-up spewage that Linux creates. There's something reassuring about watching its progress (even if it is full of weird errors).


Your comments:

Please note that while I check this page every so often, I am not able to control what users write; therefore I disclaim all liability for unpleasant and/or infringing and/or defamatory material. Undesired content will be removed as soon as it is noticed. By leaving a comment, you agree not to post material that is illegal or in bad taste, and you should be aware that the time and your IP address are both recorded, should it be necessary to find out who you are. Oh, and don't bother trying to inline HTML. I'm not that stupid! ☺ ADDING COMMENTS DOES NOT WORK IF READING TRANSLATED VERSIONS.
You can now follow comment additions with the comment RSS feed. This is distinct from the b.log RSS feed, so you can subscribe to one or both as you wish.

poop shit fish, 7th November 2012, 14:54
herp de derp I love genocyber

Add a comment (v0.11) [help?] . . . try the comment feed!
Your name
Your email (optional)
Validation Are you real? Please type 01631 backwards.
Your comment
French flagSpanish flagJapanese flag
«   May 2012   »

(Felicity? Marte? Find out!)

Last 5 entries

List all b.log entries

Return to the site index



Search Rick's b.log!

PS: Don't try to be clever.
It's a simple substring match.


Last read at 14:28 on 2024/07/15.

QR code

Valid HTML 4.01 Transitional
Valid CSS
Valid RSS 2.0


© 2012 Rick Murray
This web page is licenced for your personal, private, non-commercial use only. No automated processing by advertising systems is permitted.
RIPA notice: No consent is given for interception of page transmission.


Have you noticed the watermarks on pictures?
Next entry - 2012/05/17
Return to top of page