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Subject: Re: Video plugin and tools problems/limitations
From: Bio Hazard (BioHazard_at_bak.rr.com)
Date: 2004-02-17


> BTW, what's the battery life with video, since you seem to do long runs? I
> haven't tried, and for 8MB it's much longer.

it lasts about 4 hours on a full charge while playing video only. so i can
get in a full watching of KungPOW and UHF on a single charge

> > The plugin resets ALL audio settings EXCEPT volume to their
> > defaults (on the chip, but not in the firmware!) (that is
> > 0 dB for treble, bass, loudness; 0% for balance, bass boost;
> > stereo channel configuration). You have to enter each setting
> > in the sound settings menu and up/down them by one in order
> > to get them back or reload the from a .cfg file.

yes thats very annoying, i hope it gets fixed soon

BTW could the F buttons be bound to something? i was thinking
F1 = contrast down
F2 = backlight on\off
F3 = contrast up

contrast controls would be really handy.

----- Original Message -----
From: "[IDC]Dragon" <idc-dragon_at_gmx.de>
To: "Rockbox development" <rockbox_at_cool.haxx.se>
Sent: Monday, February 16, 2004 7:48 PM
Subject: Re: Video plugin and tools problems/limitations

> > First of all I have to say: excellent work, Jörg!
>
> Thanks!
>
> > Now on topic: As I like the new video-with-audio feature very
> > much, I did convert quite a number of videos to rvf and as I
> > also like to test extreme cases, I summarize my findings here.
>
> BTW, what's the battery life with video, since you seem to do long runs? I
> haven't tried, and for 8MB it's much longer.
>
> > Problems with the tools and the video conversion path:
> >
> > - "AVItoYUV" does not read AVIs >= 2 GB (about 1:06h at RGB24
> > uncompressed, 112x64, 25fps (PAL)) -> longer films have to
> > be split into 2GB packets to convert them to YUV. As YUV
> > are only raw frames without header, you can re-join the
> > packets after conversion, so this is a minor problem. As
> > AVItoYUV is probably not Jörg's development (file date!),
> > he may not be able to correct this problem either.
>
> This tool is from Microsoft. I don't have the sourcecode for it.
>
> > - "Halftone" does not read YUVs >= 2 GB (about 2:12h at 25fps
> > (PAL)) -> longer films have to be halftoned in 2 GB packets.
> > As RVF without audio is also headerless, you can also join
> > the packets after conversion, but since the frames in the
> > RVF are not independent (halftoning is done across several
> > frames!), you see a small glitch at the joint. I tested
> > this with "Lord of the Rings 1" (yep!)
>
> I think this can be changed to 4 GB, have to look into it.
>
> > - "RVF_MUX" has problems multiplexing the video with audio
> > that uses MPEG2 or MPEG2.5 sample rates (24k-22.05k-16k-12k-
> > 11.025k-8k): "Audio sync error in file <MP3file> at
> > <position>, possibly corrupted" is displayed multiple (many)
> > times, sometimes rvf_mux even hangs. All test MP3s were
> > prepared with LAME 3.95, CBR and VBR.
>
> MPEG2 should work. I have not implemented the 2.5 audio formats, but this
> can be easily changed.
>
> >
> > Problems with the video.rock:
> >
> > The plugin resets ALL audio settings EXCEPT volume to their
> > defaults (on the chip, but not in the firmware!) (that is
> > 0 dB for treble, bass, loudness; 0% for balance, bass boost;
> > stereo channel configuration). You have to enter each setting
> > in the sound settings menu and up/down them by one in order
> > to get them back or reload the from a .cfg file.
>
> Strange, I only set the volume, because it can be muted when the plugin
> starts. The others I don't touch. Maybe there are dependencies, do I have
to set
> all audio settings? Somebody familiar with that code?
>
> > Again: keep up the good work!
>
> I try. I'm (slowly) working on a one-click tool to convert AVI and MPEG.
> This will be Windows-only, since it uses the DirectShow infrastructure.
halftone
> and rvf_mux are portable.
>
> Jörg
>
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