mpegplayer A/V sync - please report experiences

[pabouk]

All the music videos I downloaded to it work fine, but anything longer than about 5 min starts to slow down. Such as the movie I ripped as above. It plays fine on my PC.

Does the harddrive spin up (to refill the buffer) when the slowdown appears?

[Skeith]

Its okay the problem has been resolved. It was an issue with TMPGenc. I encoded using WInFF and all is fine.

[doc]

Hello
I'm getting some syncing problems on a video which works fine on my desktop but not on my iriver h340.

skipframes is enabled.
limit fps is on.

mencoder toxicity.mpg -of mpeg -oac lavc -lavcopts acodec=mp2:abitrate=96:vmax_b_frames=16:vb_strategy=2 -af resample=44100:0:0 -ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=600 -vf scale=220:176,harddup -ofps 30 -o tox.mpg

I had it encoding at a lower fps but higher gave better results. Sorry about the video, was the smallest mpg I could find for testing There's a significant difference you can see if you compare desktop to iriver.

http://www.skynet.ie/~doc/tox.mpg (18mb)

Thanks

[linuxstb]

The iriver h340 isn't capable of decoding 30fps in mpegplayer.  According to the documentation:

http://www.rockbox.org/twiki/bin/view/Main/PluginMpegplayer

it can manage about 11fps full-screen at the moment.

[doc]

mencoder toxicity.mpg -of mpeg -oac lavc -lavcopts acodec=mp2:abitrate=96:vmax_b_frames=16:vb_strategy=2 -af resample=44100:0:0 -ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=600 -vf scale=220:176,harddup -ofps 24 -o tox.mpg

I've reencoded at 24fps, although was getting this during the process:
Pos: 222.3s   5574f (99%) 11.53fps Trem:   0min  18mb  A-V:0.050 [587:95]

24 is the lowest mencoder will allow and it's still a problem. Any other suggestions on how I can do this?

Thanks for your time.

[Llorean]

Use a different encoder, or find out how to encode at 10 with mencoder. There's probably a way to override the strictness.

[bsw]

I'm running r14251-070809 on an iRiver H320.  I've read this thread from the start and figured I'd add my data in case it helps.

I use WinFF with the "iRiver H300 4:3" profile and  force the frame rate to 8.  This creates files that are useless on my PC (who would want them that small on the PC any way??) because (as I understand it) they are not standards compliant (-strict -1).

I can increase the frame rate to 10 if I reduce the size to 176x128.

If I go any higher with the frame rate/size combo it gets too jerky - I assume because it is skipping so many frames.

But, they work as well as could be expected for 8fps video on the iRiver with skipframe and limit FPS both on.

Looking forward to performance improvements so I can up the frame rate a bit :-)

Thanks,

Brian

[boudyouck]

guys im using the latest build,

the sample elephantsdream-q6-224x128-354kbps.mpg file
display FPS: Yes
Limit FPS: Yes
Skip frames: Yes

but im only getting the speed of 10fps and the AV dont sync.. i think the video delay is like 3-5seconds.

ive tried using the elephantsdream for nano and im getting speed of 10-12 fps and video delay for 1-2seconds

this is a great project btw.. please help me guys

[linuxstb]

Are you using the ipodlinux loader2 to start Rockbox?

[boudyouck]

Yes man. is there a conflict?

[linuxstb]

Older versions of loader2 do not correcly initialise the co-processor (COP) when starting Rockbox - so mpegplayer can't make use of the COP, which is why you're getting bad performance.

Either upgrade to the very latest version of loader2, or use the official Rockbox bootloader.

[boudyouck]

ok man, ill try to update it now.. let you know the results asap.. thanks!

[Sanek]

guys im using the latest build,

the sample elephantsdream-q6-224x128-354kbps.mpg file
display FPS: Yes
Limit FPS: Yes
Skip frames: Yes

but im only getting the speed of 10fps and the AV dont sync.. i think the video delay is like 3-5seconds.

ive tried using the elephantsdream for nano and im getting speed of 10-12 fps and video delay for 1-2seconds

this is a great project btw.. please help me guys

I'm trying to play the same file on 5.5g 30gb ipod video, but I'm getting 10-12 fps max. The sound seems to be in sync when skip frames is enabled.

I use Rockbox Bootloader to start Rockbox. Also, that file doesn't even want to play unless I rename it to .m2v and open it via "open with" menu. The sound is still present in the .m2v file.

RockBox Version: r14616-070905

[scorche]

Sanek: Well, you are using a build that is around a year old.

Please read our guidelines, especially the part about updating to a new build before reporting issues.  A LOT changes within a year.

[Sanek]

Sanek: Well, you are using a build that is around a year old.

Please read our guidelines, especially the part about updating to a new build before reporting issues.  A LOT changes within a year.

Thats weird, I got this build from the Current Builds page:
http://build.rockbox.org/dist/build-ipodvideo/rockbox.zip

just yesterday.

Code: [Select]

05/09/2007  00:32         2,061,238 rockbox.zip
05/09/2007  05:11           532,024 rockbox.ipod
The rockbox-info.txt file says:

Code: [Select]

Target: ipodvideo
Target id: 15
Target define: -DIPOD_VIDEO
Memory: 32
CPU: arm
Manufacturer: ipod
Version: r14616-070905
Binary: rockbox.ipod
Binary size: 532024
Actual size: 532016
RAM usage: 1633272
gcc: arm-elf-gcc (GCC) 4.0.3
ld: GNU ld version 2.16.1
Host gcc: gcc (GCC) 4.1.3 20070812 (prerelease) (Debian 4.1.2-15)
Host system: Linux
Which is where I got the version from.  

Just tried the latest rockbox build (Version: r14625-070906), same result:
fps varies from 8 fps to 11fps.