Supported H.264 features on N900? - Page 2 - maemo.org

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Rushmore	2009-12-03 , 13:40
Posts: 1,255 \| Thanked: 393 times \| Joined on Oct 2009 @ US	#11

Standard res avi and divx files look very good on the N900. MP4 (that actually work) look better (IMO) than the same files on the Droid.

Still, MP4 needs an update on the N900, since some MP4s that play fine on the Droid do not play on the N900.

added:

This is a nice thing about Maemo compared to Android. Maemo for the N900 can get codec updates. Android can not, since part of the framework and Android is not going to add a bunch of codecs that will work ok for some chipsets and not for others.

Up to the phone carrier and the manufacturer to request a driver add-in. That does not happen with Android (accept maybe the Sony versions).

Last edited by Rushmore; 2009-12-03 at 13:46.

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	ArnimS	2009-12-15 , 10:53
	Posts: 1,107 \| Thanked: 720 times \| Joined on Mar 2007 @ Germany	#12

Originally Posted by REMFwhoopitydo

the source is a 3D animation that is:
2:19sec
333MB
1536x1152
h.264/.mov

and we are a graphics company, and thus pretty picky about the image quality, given it is our stock in trade.

Then we await your expert advice on best handbrake encoding options.

EDIT: Here's what i'm using to rip old TV series (progressive PAL). 680x480 4.25/3 anamorph, ffmpeg, monophonic, noisefilter.

Code:

                <key>PresetBuildNumber</key>
                <integer>2009112599</integer>
                <key>PresetDescription</key>
                <string>Optimized to scale older progressive-scan DVD sources (video noise, monophonic) to N900 mp4 optimized format, stretched to 4.25/3 aspect ratio.</string>
                <key>PresetName</key>
                <string>N900-DVD4.25/3</string>
                <key>SubtitleList</key>
                <array>
                </array>
                <key>Type</key>
                <integer>1</integer>
                <key>UsesPictureFilters</key>
                <integer>1</integer>
                <key>UsesPictureSettings</key>
                <integer>1</integer>
                <key>VideoAvgBitrate</key>
                <integer>1400</integer>
                <key>VideoEncoder</key>
                <string>MPEG-4 (FFmpeg)</string>
                <key>VideoFramerate</key>
                <string>Same as source</string>
                <key>VideoGrayScale</key>
                <false />
                <key>VideoQualitySlider</key>
                <real>20</real>
                <key>VideoQualityType</key>
                <integer>1</integer>
                <key>VideoTargetSize</key>
                <integer>680</integer>
                <key>VideoTurboTwoPass</key>
                <true />
                <key>VideoTwoPass</key>
                <true />
                <key>anamorphic</key>
                <true />
                <key>par_height</key>
                <integer>480</integer>
                <key>par_width</key>
                <integer>680</integer>
                <key>x264Option</key>
                <string>b-adapt=2:rc-lookahead=50</string>

i extracted that from ~/.config/ghb/presets

EDIT2: N900 demo video looks pretty nice - here's what mplayer reports for it:

VIDEO: [MP4V] 800x480 24bpp 25.000 fps 3543.6 kbps (432.6 kbyte/s)
[V] filefmt:44 fourcc:0x5634504D size:800x480 fps:25.000 ftime:=0.0400

Last edited by ArnimS; 2009-12-15 at 11:04. Reason: added useful info

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	Jack6428	2009-12-15 , 21:53
	Posts: 635 \| Thanked: 282 times \| Joined on Sep 2009 @ Black Mesa Research Facility	#13

Originally Posted by REMFwhoopitydo

obviously i can boost the bit-rate sky high, but at what point will a mobile device of n900 calibre cease to be able to play it?

cheers

I have avi files on the N900, with 4000 Kbps bitrate and they play well...i think that is the maximum the N900 can handle bitrate-wise. Resolution-wise it is 800x480, atleast defaultly for now, until perhaps VLC and final decoders are released enabling 720p playback. But i'm not sure how that will perform.

Cheers