Re: Transcoding movies for QMPlayer

2012-10-01 Thread Neil Jerram 
Gilles Filippini p...@debian.org writes:

 Hi,

 Movies transcoded with mencoder often lose A/V sync. For one of my video
 files there is a 5 secondes drift after only 1 minute of playing.

From when I used to do that for my Nokia 770, I remember that it used to
work better when I told mencoder to create an index.  I don't remember
exactly but I guess that would have been the -forceidx option.

Neil

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Re: Transcoding movies for QMPlayer

2012-10-01 Thread Gilles Filippini 
Neil Jerram a écrit , Le 01/10/2012 19:58:
 Gilles Filippini p...@debian.org writes:
 Movies transcoded with mencoder often lose A/V sync. For one of my video
 files there is a 5 secondes drift after only 1 minute of playing.
 
From when I used to do that for my Nokia 770, I remember that it used to
 work better when I told mencoder to create an index.  I don't remember
 exactly but I guess that would have been the -forceidx option.

Unfortunately this option doesn't help regarding the drift.

I'll have to go with VLC transcoding for now, while it isn't a panacea
either. I've had to downgrade the transcoded video size to 240*320 for
the movie to play fluently on the GTA04:

$ vlc input file --transform-type 270 \
  --sout '#transcode{width=320, vcodec=h264, \
  vfilter=transform:canvas{width=240,height=320}, acodec=mp4a, \
  channels=2, audio-sync}:standard{access=file, mux=mp4, \
  dst=output file}' -I dummy vlc://quit

Thanks,

_g.



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Re: Transcoding movies for QMPlayer

2012-10-01 Thread robin 
has anyone been able to play a movie on the GTA02 using this vlc conversion 
or any other conversion on a recent qtmoko built with qmplayer?
I tried this vlc script and the movie is fine on my desktop computer but
once I start it in qmplayer qmplayer stays black for a second before it 
crashes/stops without even having started the movie.

robin


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Re: Transcoding movies for QMPlayer

2012-10-01 Thread Radek Polak 
On Monday, October 01, 2012 10:00:57 PM Gilles Filippini wrote:

 Neil Jerram a écrit , Le 01/10/2012 19:58:
  Gilles Filippini p...@debian.org writes:
  Movies transcoded with mencoder often lose A/V sync. For one of my video
  files there is a 5 secondes drift after only 1 minute of playing.
 
 From when I used to do that for my Nokia 770, I remember that it used to
 
  work better when I told mencoder to create an index.  I don't remember
  exactly but I guess that would have been the -forceidx option.
 
 Unfortunately this option doesn't help regarding the drift.
 
 I'll have to go with VLC transcoding for now, while it isn't a panacea
 either. I've had to downgrade the transcoded video size to 240*320 for
 the movie to play fluently on the GTA04:
 
 $ vlc input file --transform-type 270 \
   --sout '#transcode{width=320, vcodec=h264, \
   vfilter=transform:canvas{width=240,height=320}, acodec=mp4a, \
   channels=2, audio-sync}:standard{access=file, mux=mp4, \
   dst=output file}' -I dummy vlc://quit

I am now playing a bit with it again. I have noticed the drift too. Probably 
the encoding params that are used for GTA02 would work ok even for GTA04 - i 
have changed them for GTA04 to increase quality of video, but i think we 
should remove the ifdef and keep them same as for GTA02.

However there are some interesting directions.
- Mplayer in wheezy can play very well ogv
- We can use theorarm which is ogv player mostly in assembly optimized for ARM
- switch to wheezy/armhf for GTA04 which could give us some more speed

Regards

Radel

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Transcoding movies for QMPlayer

2012-09-30 Thread Gilles Filippini 
Hi,

Movies transcoded with mencoder often lose A/V sync. For one of my video
files there is a 5 secondes drift after only 1 minute of playing.

I finally found out that VLC does a better job in this regard. But it
was quite difficult to retrieve the correct set of options.

FWIW here is the command line I've ended up with:

$ vlc movie file in --transform-type 270 --sout \
  '#transcode{vcodec=h264, \
  vfilter=transform:canvas{width=480,height=640}, \
  acodec=mp3, channels=2, audio-sync}:standard{access=file, \
  mux=mp4, dst=movie file out.avi}' \
  -I dummy vlc://quit

Thanks,

_g.



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