Rockbox Development > Feature Ideas
various feature ideas
saratoga:
--- Quote from: zaphee on January 29, 2010, 03:39:49 PM ---
--- Quote from: bluebrother on January 29, 2010, 02:58:41 PM ---
--- Quote from: zaphee on January 29, 2010, 02:35:12 PM ---- 3GP video support
--- End quote ---
3gp is a container format that can contain several codecs. For video this is h263, and most (all?) supported players are likely to be noticably too slow for this.
--- End quote ---
I actually mean the videos taken from mobile phones. I thought that some quite old mobile phones support *encoding* in this format, why wouldn't some color-screen rockbox targets just decode it ? And there's already support for some MPEG videos, as far as I know, so I suppose that targets supporting this are fast enough to decode videos with such quality ? IMHO, it's still worth trying (well, I think...).
--- End quote ---
Why don't you look up what this codec is for whatever phone you're thinking of, and then see (or ask) if its likely to be feasible to decode in Rockbox? Its not really helpful to suggest a format without telling us what the format is.
zaphee:
--- Quote from: saratoga on January 29, 2010, 05:33:54 PM ---
--- Quote from: zaphee on January 29, 2010, 03:39:49 PM ---
--- Quote from: bluebrother on January 29, 2010, 02:58:41 PM ---
--- Quote from: zaphee on January 29, 2010, 02:35:12 PM ---- 3GP video support
--- End quote ---
3gp is a container format that can contain several codecs. For video this is h263, and most (all?) supported players are likely to be noticably too slow for this.
--- End quote ---
I actually mean the videos taken from mobile phones. I thought that some quite old mobile phones support *encoding* in this format, why wouldn't some color-screen rockbox targets just decode it ? And there's already support for some MPEG videos, as far as I know, so I suppose that targets supporting this are fast enough to decode videos with such quality ? IMHO, it's still worth trying (well, I think...).
--- End quote ---
Why don't you look up what this codec is for whatever phone you're thinking of, and then see (or ask) if its likely to be feasible to decode in Rockbox? Its not really helpful to suggest a format without telling us what the format is.
--- End quote ---
OK, sorry. Didn't know that 3GP _container_ (thanks bluebrother) can contain several different codecs. I did actually think of h263 for video, however not for the super-high-resolution videos (like 640x480 which is probably not feasible on any of the rockbox targets), but ones with video size of 176x144 at 15 fps (or 128x96 at 12 fps) and AMR for audio at 16 kbps, 8 KHz mono (by the way, implementing ARM-only audio files playback would be nice too). I am not an expert (so I may be wrong) but I doubt that pre-2007 mobile phones are much faster than most of the color-screen rockbox-supported DAPs, so I believe it's possible. What do you think ?
saratoga:
--- Quote from: zaphee on January 30, 2010, 01:31:57 PM ---I am not an expert (so I may be wrong) but I doubt that pre-2007 mobile phones are much faster than most of the color-screen rockbox-supported DAPs, so I believe it's possible. What do you think ?
--- End quote ---
The gigabeats are probably faster, and maybe the Ipod Nano 2G. Not much else is though.
I would like to see mpegplayer expanded to work on more audio and video formats.
raudonkepuraite:
Most Nokia smartphones (older ones) use ARM 9 processors ranging from 100mhz to 300mhz, ALL SonyEricsson K, W series and most smartphones use same ARM 9 (well not exactly the same) clocked at 200mhz, most old Siemens and BenQ phones utilize weak 66mhz - 95mhz brains :D
They are able to play most 3gp containers.
bluebrother:
--- Quote from: raudonkepuraite on February 01, 2010, 12:34:39 PM ---Most Nokia smartphones (older ones) use ARM 9 processors ranging from 100mhz to 300mhz,
--- End quote ---
And most Rockbox targets use an ARM7 core. Which is, obviously, slower. Most Rockbox targets use a CPU frequency of less than 100MHz. Which is, obviously, less than "100 to 300".
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