Is Good Quality Video Possible On The 3100?

[Quickfry]

I have some space, Cresho, and am willing to host some files for a good cause. PM if you are interested.

[icruise]

but that video was originally made to run on a zaurus from an sd card.  if you recall, you cant run video off an sd but with this format, it is possible.

Why can't you run video off of an SD card? I'm doing it right now and it's indistinguishable from running it off of the internal hard disk.

[Cresho]

but that video was originally made to run on a zaurus from an sd card.  if you recall, you cant run video off an sd but with this format, it is possible.

Why can't you run video off of an SD card? I'm doing it right now and it's indistinguishable from running it off of the internal hard disk.
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oops..........that was specific to the sl-5500.  its fine on the c series.

[chrget]

oops..........that was specific to the sl-5500[div align=\"right\"][a href=\"index.php?act=findpost&pid=98318\"][{POST_SNAPBACK}][/a][/div]

Well, in that case I hope my Collie never finds out, otherwise it might just stop playing back videos directly from SD

The main problem with video playback from SD with Collie is the performance of the original SD driver shipped with the OS -- it's slow and uses quite a bit of CPU while accessing the card. The patched driver available from the forum download section does not exhibit that kind of behaviour and thus works fairly well even for video playback.

Best regards,
Chris.

[lardman]

iCruise, do you have a copy of that starwars video which is not rotated?

I'd be interested to doing a speed comparison on the c7x0 using hardware rotation and the later PXA270 machines using software rotation, plus the Nokia 770 is probably not overly happy playing it in rotated state so I could do with a normal landscape version to (ask koen to) test on that.

Sorry to be a pain,


Si

[icruise]

iCruise, do you have a copy of that starwars video which is not rotated?

I'd be interested to doing a speed comparison on the c7x0 using hardware rotation and the later PXA270 machines using software rotation, plus the Nokia 770 is probably not overly happy playing it in rotated state so I could do with a normal landscape version to (ask koen to) test on that.

Sorry to be a pain,


Si
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I'm afraid not. I'd have to rerip the DVD and start from scratch to get a non-rotated version, and I don't really have the time for that at the moment. But if you want to try experimenting yourself, you can use PocketDIVXEncoder with any DVD and make two short clips, one rotated and one not.

[ShiroiKuma]

I found out that rotating the video 90 degrees clockwise during encoding makes it run more smoothly on the Zaurus. I've attached a 25-second clip from Star Wars that has been encoded in this way. It's 640 x 326 widescreen, 500kbps, mono sound, and it runs well on my Zaurus. I would think a clip this short shouldn't be a problem from a copyright standpoint, although the mods are of course free to take it down if they choose. You might need to run it twice to really see the quality, since the first time through may be a little jerky.

I use PocketDivXEncoder to encode my videos. It seems to work the best and is relatively easy once you figure it out.
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Reviving an old thread...

I'd like to encode the video at 640 width, which Cresho's method is not good for, since if the video isn't rotated, the Z isn't powerful enough to play it.

icruise, what were the settings you use in PocketDivxEncoder, and how big is the resultant movie, say Star Wars?

Cresho, do you know if it's possible to rotate the video in Vidomi? I haven't found out how.

[Cresho]

just out of curiousity, what benefits do you get from rotating the video?  and I checked vidomi and cannot find a "rotate"  I did use pocketdivx and found it to be very.....good depending on what you want to really use it for.

[ShiroiKuma]

just out of curiousity, what benefits do you get from rotating the video?  and I checked vidomi and cannot find a "rotate"  I did use pocketdivx and found it to be very.....good depending on what you want to really use it for.
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If you rotate the video and uncheck the Auto-Rotate option in Kino, the Z can play video with 640 width - this is much better visual quality than 320 width.

PocketDivxEncoder is fine, can do this - only it lacks advanced control ops, i.e. you can pick the video quality on a scale of 1 to 10, but not much else.

I've tried encoding at 5 quality, this produces roughly a 500MB video for a 105 min. movie at 640x320 resolution.

I've tried already and it plays on the Z, without jerks or getting stuck, and it's much better to watch than the same stuff encoded with vidomi at 320 width.

I think Vidomi produces better quality video at 640 width, but it's not playable on the Z because it's not rotated and thus jerks and gets stuck and all...

[xamindar]

If you rotate the video and uncheck the Auto-Rotate option in Kino, the Z can play video with 640 width - this is much better visual quality than 320 width.

PocketDivxEncoder is fine, can do this - only it lacks advanced control ops, i.e. you can pick the video quality on a scale of 1 to 10, but not much else.

I've tried encoding at 5 quality, this produces roughly a 500MB video for a 105 min. movie at 640x320 resolution.

I've tried already and it plays on the Z, without jerks or getting stuck, and it's much better to watch than the same stuff encoded with vidomi at 320 width.

I think Vidomi produces better quality video at 640 width, but it's not playable on the Z because it's not rotated and thus jerks and gets stuck and all...
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Can I ask what exactly you are talking about?  So you want to watch your videos at 480x640 (portrait) instead of 640x480?  On the c3100 and probably the other models the videos are played in the proper rotation already.  I play plenty of 640x480 videos just fine on mine.

[Cresho]

yeah "xami"!  he just wants to know the methods you used.

[pelrun]

The LCD's in the clamshell Z's are natively portrait (480x640). So while videos may be "playing normally" in landscape mode, you're actually wasting a lot of processor time just in rotating the video.

Therefore it's better to pre-rotate video (you're re-encoding it anyway) and turn the rotation off in mplayer/kino. You still get proper landscape orientation but without the performance hit.

[xamindar]

The LCD's in the clamshell Z's are natively portrait (480x640). So while videos may be "playing normally" in landscape mode, you're actually wasting a lot of processor time just in rotating the video.

Therefore it's better to pre-rotate video (you're re-encoding it anyway) and turn the rotation off in mplayer/kino. You still get proper landscape orientation but without the performance hit.
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That would be interesting.  I guess I don't understand how it works.  My "auto rotate" setting is off in kino and my movies play in the proper way.  Is mplayer or kino set to rotate it by default no matter what the setting is?

[ShiroiKuma]

That would be interesting.  I guess I don't understand how it works.  My "auto rotate" setting is off in kino and my movies play in the proper way.  Is mplayer or kino set to rotate it by default no matter what the setting is?
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It works exactly like pelrun says. If your video is not rotated when encoding and you play it in Kino in landscape mode, the software rotates it and plays it, this wastes processor power.

Sometimes even when you uncheck the auto-rotate option in Kino it rotates it etc. So your videos would play.

I'm surprised though that you mention that you can play 640x480 videos just fine.

Are you sure they are 640x480 and not 320x240? If so, can you specify how you encoded these, because I haven't found a way to play 640x480 files unless they're pre-rotated.

[xamindar]

That would be interesting.  I guess I don't understand how it works.  My "auto rotate" setting is off in kino and my movies play in the proper way.  Is mplayer or kino set to rotate it by default no matter what the setting is?
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It works exactly like pelrun says. If your video is not rotated when encoding and you play it in Kino in landscape mode, the software rotates it and plays it, this wastes processor power.

Sometimes even when you uncheck the auto-rotate option in Kino it rotates it etc. So your videos would play.

I'm surprised though that you mention that you can play 640x480 videos just fine.

Are you sure they are 640x480 and not 320x240? If so, can you specify how you encoded these, because I haven't found a way to play 640x480 files unless they're pre-rotated.
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Here is a link to a music video that plays just fine on my zaurus:
[a href=\"http://radnimax.com/misc/endless.avi]http://radnimax.com/misc/endless.avi[/url]
In fact, most music videos I download play just fine on my zaurus without any special re-encoding.  
The settings I have enabled in preferences under the video tab are "Drop frames", "Disable aspect ratio correction", and "Enable audio autosync".  All others are dissabled.  There is a slight jerkyness to this video only because it has to drop frames.  I got a script from somewhere in these forums that will convert anything to a better zaurus friendly format but I haven't used it in a while.  In my opinion it reduces the quality a bit too much.  I'll eventually get around to twiking it to better sute my needs, but I haven't considering they already play at acceptable speeds.

If you want any more info, let me know.  You can't get ANY 640x480 videos to play at acceptable framerates?