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recorder: Port to new gstreamer vp8enc api

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The speed and quality properties have been removed in favor of properties
closer to the upstream library.

Removing the properies from the pipeline would result into a huge
slowdown so we have to map the old values to the new ones.

According to the source code of the old vp8enc element quality maps to
(int)(63 - quality * 6.2) for min_quantizer and max_quantizer, while
speed maps to cpu-used = speed == 0 ? 0 : (speed - 1).

So set min_quantizer and min_quantizer to 13, and cpu-used to 5 based on
the above formulas.

https://bugzilla.gnome.org/show_bug.cgi?id=684206
This commit is contained in:
Adel Gadllah 2012-09-17 18:55:02 +02:00
parent 633bbd8a9e
commit e71c016477
2 changed files with 3 additions and 3 deletions
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2
data/org.gnome.shell.gschema.xml.in.in
View File

@ -132,7 +132,7 @@ value here is from the GsmPresenceStatus enumeration.</_summary>
take care of its own output - this might be used to send the output
to an icecast server via shout2send or similar. When unset or set
to an empty value, the default pipeline will be used. This is currently
'vp8enc quality=8 speed=6 threads=%T ! queue ! webmmux'
'vp8enc min_quantizer=13 max_quantizer=13 cpu-used=5 deadline=1000000 threads=%T ! queue ! webmmux'
and records to WEBM using the VP8 codec. %T is used as a placeholder
for a guess at the optimal thread count on the system.
</_description>

4
src/shell-recorder.c
View File

@ -143,7 +143,7 @@ G_DEFINE_TYPE(ShellRecorder, shell_recorder, G_TYPE_OBJECT);
* (Theora does have some support for frames at non-uniform times, but
* things seem to break down if there are large gaps.)
*/
#define DEFAULT_PIPELINE "vp8enc quality=8 speed=6 threads=%T ! queue ! webmmux"
#define DEFAULT_PIPELINE "vp8enc min_quantizer=13 max_quantizer=13 cpu-used=5 deadline=1000000 threads=%T ! queue ! webmmux"
/* If we can find the amount of memory on the machine, we use half
* of that for memory_target, otherwise, we use this value, in kB.
@ -1598,7 +1598,7 @@ shell_recorder_set_filename (ShellRecorder *recorder,
* might be used to send the output to an icecast server
* via shout2send or similar.
*
* The default value is 'vp8enc quality=8 speed=6 threads=%T ! queue ! webmmux'
* The default value is 'vp8enc min_quantizer=13 max_quantizer=13 cpu-used=5 deadline=1000000 threads=%T ! queue ! webmmux'
*/
void
shell_recorder_set_pipeline (ShellRecorder *recorder,