to Makotonen / Re:2006 beta Video Player

June 16, 2006 on 9:22 am | In maemo, nokia770 | 6 Comments

after having looked at the maemo 2.0 beta, and viewing the video several times, I have to admit the video performance is very good (for at least the discovery video included on the firmware), and much better than the 2005 firmware.
It runs at 352×208, and appears to have a very good frame rate on the 770, even at full screen. I tried out some of my older video clips at lower resolution, and they did not appear to be any better than on the old firmware. So i am assuming that the discovery video has been optimized to work well on the 770 with the 2.0 video player.

The question i throw out to the nokia Video Player team is this..
Can you share the magic with the rest of us on how to transcode our videos so they look that good on the 770? Is the resolution critical? what are the video / audio codec settings?
What is it that makes the discovery clip look so much better than most clips (on the 770)? How can we too optimize our videos for the 770?
Hopefully
ubergEEk

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  1. Did you read this?
    maemowiki/VideoEncoding

    Comment by Timon — June 16, 2006 #

  2. yes i have read it. and ran about 100 benchmarks at various levels of resolution, video bit rate, audio bit rate, frame rate, etc, and then in windowed mode and full screen. And i have not tried disecting the discovery video yet (been a busy week at work), but that video does not ‘fit the curve’ as far as generating videos by that howto. I believe that this video may be taking advantage of a ‘sweetspot’ in the device / firmware that is not widely known.

    Try a videos with transcode by that howto and then compare to the discovery video.

    ubergEEk

    Comment by admin — June 16, 2006 #

  3. I’ve noticed that my DIVX AVIs (1-2 hrs in length) show the wrong “end time” in the new video player. At open time, for a moment, I get the correct “end time” (say 1 hr 59 minutes). Then, for some bizarre reason, the timeline changes to a trivial 34 seconds. It plays beyond the end time. However, this makes it impossible to “fast forward” or use the slider to skip ahead. These same AVIs were fine in the last release OS2005_5_2006_13_7.

    Have you seen this on your movies in the new movie player?

    Comment by Ian Goh — June 16, 2006 #

  4. If you post some or all of the video online, I’ll see if I can make my 770-encode script produce the same output.

    I’ve not upgraded my device to 2006 OS yet, but have the SDK installed…

    TIA,

    Andrew

    Comment by Andrew Flegg — June 17, 2006 #

  5. Beside codec parameters I think it should be checked if some kind of preprocessing (before encoding) was done on discovery clip.

    Most of the time it is time-compressed (accelerated), and therefore it may give you subjective feeling that “everything goes smooth”.

    Regarding the bechmark issue, what have you used to bechmark video performance?

    Regards,
    Momcilo

    Comment by Momcilo — June 19, 2006 #

  6. Hello,

    the discovery video is just 352×208 MPEG4 at 15 frames/sec. The audio is 64kbits/s MP3.
    So, I think that there is no reals improvements in the 2006 OS Video Player !

    Comment by medspx — June 19, 2006 #

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