Support and General Use > Plugins/Viewers
5.5g poor Mpeg Playback
Zayger:
Hi,
I have a 30gb 5.5g Video Ipod, I been using rockbox for a while now and love it. My only question is on my particular ipod version is mpeg playback usally poor? My ipod plays audio at the correct speed but on all videos including the elephant dream one, every half second or so it must skip a bunch of frames to keep up with the audio. Until today I thought this maybe just be a codec issue so I decided there was nothing I could do about it an left the apple firmware to do all the video playing. But today a friend of mine installed rockbox on his 1st gen Ipod nano and he says that video playback is for him "as smooth as silk". This seemed strange to me since the ipod video supposable has a better CPU and I would assume that meant its video capabilities were higher.
Any and all information I can get on this subject is useful Thanks. ;D
GodEater:
Mpegplayer performs poorly on all iPod videos. The screen is a high resolution, and the processor doing all the work is underpowered for it. Bear in mind - we don't know how to use the Video's built in hardware mpeg decompressor - and likely won't do (if ever) for a very long time.
For this reason we don't recommend using the MpegPlayer plugin on the video - stick to the original firmware for watching movies.
For the record, the CPU in the Nano and the Video is identical - the difference is in the screen resolution. It's much lower on the Nano, and so the processor has to do less work.
Zayger:
Ok thanks, I had suspected it might have been something to do with the screen resolution. Just glad to clear it up. :D
FujiSkunk:
First post, so let me get the obligatory "Rockbox rocks!" out of the way. ;D
--- Quote from: GodEater on September 14, 2007, 09:18:18 AM ---For the record, the CPU in the Nano and the Video is identical - the difference is in the screen resolution. It's much lower on the Nano, and so the processor has to do less work.
--- End quote ---
Would it help if mpegplayer had an option to reduce the output resolution to something like 160x120, and then just windowbox the output?
I have a 80GB 5.5G Video, and while 320x240 video playback gets lots of frame-skipping, I have a 160x120 file that plays just fine.
AlexP:
Are you suggesting just playing a section of the video or resizing on the fly?
If you are going to do that, since you have to encode for rockbox anyway, why not just encode at a smaller resolution on the first place?
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