[Gambas-user] Grabbing certain data from a stream, help a newb

[lozza1978]

Hi there,

thanks for repling, and your example but, im new and dont really understand
your code, 
is there any chance that you could post an example with working code so that
i can understand?

what is going on here?
PRINT Scan("Pos:   0.1s      3f ( 100%)  0.00fps", "Pos: *s *f ( *%) *fps*") 
[2] 
ive checked out the scan command at  http://gambasdoc.org/help/lang/scan
gambas scan function  but cannot see how it will help as the 
PRINT Scan("Pos:   0.1s      3f ( 100%)  0.00fps", "Pos: *s *f ( *%) *fps*")
Pos:   0.1s      3f ( 100%)  0.00fps", "Pos: *s *f ( *%) *fps*") 

changes and I cannot predict the percentage. as shown in the file test88
test88 file:
Writing header...
INITV: 0.200, 0.160, fps: 25.000
Pos:   0.1s      2f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.004 [0:0]
Pos:   0.1s      3f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.008 [0:0]
Pos:   0.2s      4f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.013 [0:0]
Pos:   0.2s      5f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.017 [0:0]
Pos:   0.2s      6f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.021 [0:0]
Pos:   0.3s      7f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.025 [0:0]
Pos:   0.3s      8f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.029 [0:0]
Pos:   0.4s      9f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.033 [0:0]
Pos:   0.4s     10f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.038 [0:0]

Am I reading to much into this? Its driving me mad, I know most programmers
do this?, as how else do they show a progress bar while installing a program
in windows for example..

I know I have a lot of reading and lessons to learn but I just love gambas
and the it works, well done guys. its genius

I have searched the universe for info and easy to follow examples but i get
lost! :-(


Fabien Bodard-4 wrote:
> 
> Le Saturday 05 January 2008 21:43:05 lawrence pires, vous avez écrit :
>> Hi All,
>>
>> I only recently found Gambas, but I got to say its amazing & addictive.
>>
>> This is what I have at the moment:
>>
>> EXEC [dvdmovie, Textbox1.Text] FOR READ AS "Contents"
>>
>> PUBLIC SUB Contents_Read()
>>
>> DIM hFile AS File
>> DIM sLine AS String
>>
>>  READ #LAST, sLine, Lof(LAST)
>>  sOutput &= sLine
>>
>> hFile = OPEN "/home/lop/Desktop/test88" FOR CREATE
>> WRITE #hFile, sOutput, Len(sOutput)
>> CLOSE #hFile
>> END
>>
>> & this is stream written to test88
>>
>> VDec: vo config request - 616 x 252 (preferred colorspace: Planar YV12)
>> VDec: using Planar YV12 as output csp (no 0)
>> Movie-Aspect is 2.44:1 - prescaling to correct movie aspect.
>> videocodec: libavcodec (720x576 fourcc=3267706d [mpg2])
>> Pos:   0.0s      1f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.000 [0:0]
>> Writing header...
>> INITV: 0.200, 0.160, fps: 25.000
>> Pos:   0.1s      2f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.004 [0:0]
>> Pos:   0.1s      3f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.008 [0:0]
>>
>>
>> the output from the shell is directed to the test88 file creating a new
>> line every time.
>>
>> 'Pos:   0.1s      3f ( 0%)  0.00fps Trem:   0min   0mb  A-V:0.008 [0:0'
>>
>> Now I need to grab the percentage (0%) this will change as the exec
>> command
>> completes the process,
>>
>> The only command I can find close is Split, to spilt the string/stream,
>> but
>> this creates a massive array, so i dont think this is a good path to
>> take,
>> (What do you think?).
>>
> 
> PRINT Scan("Pos:   0.1s      3f ( 100%)  0.00fps", "Pos: *s *f ( *%)
> *fps*")
> [2]
> 
> 
>> The reason why I want to grab the percentage is so that I can correctly
>> setup the progress bar, Im thinking that the only way the progress bar
>> will
>> be correct in showing the progress of the exec command is to grab the
>> percentage of completion from the stream, somehow convert the string into
>> an integer and then do something like this
>>
>> ProgressBar1.Visible = TRUE
>> ProgressBar1.Value += PERCENTAGE FROM STREAM
>> ProgressBar1.Refresh
>>
>>
>> ***The only reason im writing to file atm is so that I can debug, I would
>> like to do this on the fly really.
>>
>>
>> Has anyone got any ideas or tips?, how would you do it?, Am I going in
>> the
>> right direction?, im totally lost at spitting the stream, getting the
>> right
>> bit and then changing a string to an integer so I can use it for the
>> progress bar? any help would be amazing
>>
>> Thanks 2 Gamabs
> 
> Really easy :
> Dim aString as String[]
> Dim fTime, fFps, fProgress  as Float
> 
> 
> aString =  Scan(sMyString, "Pos: *s *f ( *%) *fps*")
> 
> fTime = CFloat(aString[0])
> fProgress = CFloat(aString[2])
> fFtp = CFloat(aString[3])
> ProgressBar1.Visible = TRUE
> ProgressBar1.Value = fProgress / 100
> 
> 
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