Re: JPEG Quality of saved snapshots

[Stefan Kost <ensonic hora-obscura de>]

daniel g. siegel schrieb:
> On Di, 2009-04-14 at 10:04 +0300, Stefan Kost wrote:
>   
>> Johannes Bittner schrieb:
>>     
>>> Hi,
>>>
>>> the quality of the saved snapshots is rather bad. I wrote this simple
>>> patch to set the JPEG quality to 100. Would you mind integrating it
>>> into Cheese, at least until it's possible to configure it?
>>>   
>>>       
>> I think 85 would definitely be enough. Otherwise its a good idea.
>>     
>
> is 85 the default? couldnt find that in the docs while having a quick
> look.
>   
Jpeg quality goes from 0 to 100. tests have shown that 85 looks
indistinguishable from the original for almost every case. Using
quality>85 is mostly a waste of space. 70 is best compromise of space
and quality.

No idea what gdk_pixbuf uses by default. The docs don't tell.

Stefan

>   
>> Stefan
>>
>>     
>>> bye,
>>> Johannes
>>>
>>> Index: src/cheese-webcam.c
>>> ===================================================================
>>> --- src/cheese-webcam.c	(revision 1231)
>>> +++ src/cheese-webcam.c	(working copy)
>>> @@ -213,7 +213,8 @@
>>>                                       FALSE, bits_per_pixel, width,
>>> height, stride,
>>>                                       NULL, NULL);
>>>
>>> -  gdk_pixbuf_save (pixbuf, priv->photo_filename, "jpeg", NULL, NULL);
>>> +  gdk_pixbuf_save (pixbuf, priv->photo_filename, "jpeg", NULL,
>>> +                   "quality", "100", NULL);
>>>    g_object_unref (G_OBJECT (pixbuf));
>>>
>>>    g_signal_handler_disconnect (G_OBJECT (priv->photo_sink),
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