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MPEG player issue

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cool_walking_:

--- Quote ---silence takes up less buffer room than music, for example
--- End quote ---
Sorry to take the thread off on a tangent, but I don't think this is right, and if my understanding is wrong, I'd like to find out.  It may be that MP3/Ogg Vorbis/WMA/etc. compress silence better than noisy areas (I have no idea), but this has to be converted to raw audio data in order to be played, and this takes up the same amount of space no matter what sort of sound it is.

Perhaps your .mp4 files have DRM, which is why the programs listed on the Wiki don't work.

--- Quote from: http://www.blazemp.com ---Provides a solution to convert DRM protected WMA files, convert protected AAC and M4P files, and convert OMA to MP3, WAV, WMA, OGG
--- End quote ---

ericslaw:
My MPlayer/Mencoder MPEG files play video too fast, but only on my nano.

I'm using the following command (modeled from the examples in the RockBox wiki) to create the video:

mencoder.exe \
dvd://1 -dvd-device e: \
-of mpeg \
-oac lavc -lavcopts acodec=mp2:abitrate=96 \
-af resample=44100:0:0 \
-ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=100:vmax_b_frames=16:vb_strategy=2 \
-vf scale=176:96,harddup \
-ofps 30000/1001 \
-o sample.mpg

The result is a video file that plays just fine using mplayer, vlc, and xulplayer on the desktop.
I have a Sansa e250 2GB player with the same version of rockbox and it plays just fine.

I get the distinct impression that the video is playing back 'as fast as it can'... ie: some parts seem faster than others.
I tried various framerates (25, 30000/1001 =~ 30, etc), and have varied the video bitrate (100,200,300,600) but
all the results seem the same.

XUL player shows me some of the container information and I noticed that the video bitrate field is 0.
Could that be way it tries to play so fast?
The audio is clear and normal sounding the entire time.

Thanks
Eric

Llorean:
Are you sure you never disabled the option to limit framerate and skip frames? Both of these should be enabled for proper playback.

ericslaw:
Paul, I had a feeling you'd reply quickly to this... for that I thank you.

I had been playing with those Limit FPS and Skip Frame options, but as it turns out, they were what did the trick.
Seems like once I dropped by video bitrate down to something the nano could handle, the 'skip frame' was less relevant,
but the Limit FPS became important.

Sorry to have wasted your time, but I hope this thread helps the next person with this issue
(Googling the web wasn't very helpful for me today).

Thanks very much

(Oh and the mpeg viewer plugin has dramatically improved over the last few versions...
I really like the 'set start time' option (with preview too!)
Now if I could just figure out why the sansa 'set start time' increments in seconds, while the nano increments in minutes....

Llorean:
Up / Down increment minutes, Left / Right increment seconds, as long as both are using an absolute current build. But I'm not sure if they both use the wheel the same way (one might treat it as up/down, the other left/right if the mapping is imperfect).

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