space2
Joined: Jun 15, 2004
Posts: 218
From: Lund/Sweden
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Hi!
I saw some of you had the problem that when playing long movies the phone seemed to crash. It waited a lot of seconds/minutes till the movie started to play, and was not responsive in that time.
I had the same problem, I tried with only smaller files, ~7-8 minutes, and the file had a startup time of 12-16seconds. I can image a full movie would then need ~2-3 minutes!
But, today I was able to fix the movie file, and now it starts in ~3 seconds (and I think the 3 seconds is not scalable, ie longer movies should start in the same time, but I don't have a bigger memory card to test 
Now the bad news: I used linux. The good news: I think the tool I used (http://mpeg4ip.sf.net) is availabe for windows as well.
So now the solution:
First let's list the contents/tracks of the .mp4 file:
$ mp4creator -list input.mp4
Track Type Info
1 video MPEG-4 Unknown Profile(0), 380.360 secs, 160 kbps, 320x240 @ 25.000000 fps
2 audio MPEG-4 AAC LC, 380.309 secs, 32 kbps, 48000 Hz
Now extract the two tracks:
$ mp4creator -extract=1 input.mp4
$ mp4creator -extract=2 input.mp4
Keep in mind that the numbers 1 and 2 are the track numbers for the video and audio tracks, so it depends on the input file.
Now let's rename them:
$ mv input.mp4.t1 input.divx
$ mv input.mp4.t2 input.aac
And pack them together:
$ rm -f output.mp4
$ mp4creator -H -i -I -c input.divx -r 25 output.mp4
$ mp4creator -H -i -I -c input.aac output.mp4
$ mp4creator -optimize output.mp4
Note1: just to be sure delete the output file, since if it already exists, mp4creator will add the tracks to it
Note2: for the video track you must specify the rate, in my case it was a 25fps movie, hence I specified -r 25
And let's check the result:
$ mp4creator -list output.mp4
Track Type Info
1 video MPEG-4 Simple @ L1, 380.360 secs, 160 kbps, 320x240 @ 25.000000 fps
2 hint Payload MP4V-ES for track 1
5 audio MPEG-4 AAC LC, 380.309 secs, 32 kbps, 48000 Hz
6 hint Payload mpeg4-generic for track 5
7 od Object Descriptors
8 scene BIFS
You can notice that there are some more tracks. I think the problem was the lack of the tracks 7 and 8 (because adding just the hint tracks didn't solved it)
Please let me know if this works/doesn't work for you. |
ares
Joined: Dec 11, 2003
Posts: > 500
From: Coimbra, Portugal
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AFAIK, M3 converter does all that automaticaly
Also, i donīt think there are any more delays with the latest firmwares?
SE w880 + Iphone 4 16gb |
Posted: 2006-09-16 12:39
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