GPCimema limits; sound problem

[zboy9]

Hi,

I just bought GPcimema and put a movie on it, but I was wondering, is there a bitrate limit? I know on moviepark it was 128, so I tried 210, and it didn't work, but 199 did. Also, is there a sound quality limit? One more question: I have very cracky sounding noise with my movie, but I have the sound set to 32 kbs, 44100 I think, and I clicked the "high quality" box. Any suggestions? Thanks a lot.

 

[Nara]

Dunno about a bitrate limit.. but you should change the sound to 22050 or 11025 (don´t know if GPcinema likes 44100 ).
Then you should be able to have higher video bitrate and no cracky sounding noise i think.

best clip on my gp32:
2pass xvid
320x176 15fps
289kbit/s

22050 Hz Stereo
48kbit/s

 

[khephren]

Hi,

I just bought GPcimema and put a movie on it, but I was wondering, is there a bitrate limit? I know on moviepark it was 128, so I tried 210, and it didn't work, but 199 did. Also, is there a sound quality limit? One more question: I have very cracky sounding noise with my movie, but I have the sound set to 32 kbs, 44100 I think, and I clicked the "high quality" box. Any suggestions? Thanks a lot.

Also, don't forget to turn the processor speed up on the GPcinema title screen. Otherwise that will cause frame and sound stutter.

 

[zboy9]

yeah, I had it set at 133. any more suggestions? (PLEASE)

 

[Jim diGriz]

The 'cracky sounding noise' your describing seems to occur when pushing encoding settings too far.Many A/V bitrates that worked fine with MoviePark will produce choppy results with GP Cinema, when using the higher fps options it opens up to us.It's going to vary for different movies and you'll have to be the most careful with action films.

With an fps of 15 and GP Cinema running at 133mhz, these settings should work well in 90% of cases:

200 video bitrate.
24 or 32 kBits/s, 11,025 Hz stereo for audio.
Resize the height to less than 240.Try 176 and work down in multiples of 16.

The resize settings you choose also effect performance.In many situations- certainly for action films- going for full screen ie 320x240 will produce choppy sound even with conservative encoding settings.When you resize, make sure any reductions you make are multiples of 8 or 16.

A width of 320 is fine.Concentrate on reducing the height.

Obviously if your source video is full screen, doing this does mess with the aspect ratio.If this really bothers you and you wish to maintain the aspect ratio, the simplest step is to lower the fps to 12.

 

[zboy9]

THanks for all your help guys, and it looks like I have some experimenting with GPcinema coming up for me.