Anssi Hannula wrote:
Lauri Tischler wrote:
Anssi Hannula wrote:
JJussi wrote:
Hi!
I have very simple and still hard question..
At vdr pluging setup - xineliboutput - Video.
Post processing (ffmpeg) and Deinterlaceing.
What ARE best values (to select) when you have HD LCD (via DVI) as
TV and enough CPU power (Intel Core 2 Duo) to use.
I think that I'm not only one who thinks that there is too many
choices.. ;-)
I use vdr-sxfe with "--video=xv --aspect=16:9 --post
tvtime:method=Greedy2Frame,cheap_mode=0,pulldown=0,use_progressive_frame_flag=1".
Is there a document somewhere which explains all switches in above
command ?
I think they are shown somewhere in xine gui, but quoting from xine-lib
source:
PARAM_ITEM( POST_PARAM_TYPE_INT, method, enum_methods, 0, 0, 0,
"deinterlace method" )
PARAM_ITEM( POST_PARAM_TYPE_BOOL, enabled, NULL, 0, 1, 0,
"enable/disable" )
PARAM_ITEM( POST_PARAM_TYPE_INT, pulldown, enum_pulldown, 0, 0, 0,
"pulldown algorithm" )
PARAM_ITEM( POST_PARAM_TYPE_INT, framerate_mode, enum_framerate, 0, 0, 0,
"framerate output mode" )
PARAM_ITEM( POST_PARAM_TYPE_BOOL, judder_correction, NULL, 0, 1, 0,
"make frames evenly spaced for film mode (24 fps)" )
PARAM_ITEM( POST_PARAM_TYPE_BOOL, use_progressive_frame_flag, NULL, 0,
1, 0,
"disable deinterlacing when progressive_frame flag is set" )
PARAM_ITEM( POST_PARAM_TYPE_BOOL, chroma_filter, NULL, 0, 1, 0,
"apply chroma filter after deinterlacing" )
PARAM_ITEM( POST_PARAM_TYPE_BOOL, cheap_mode, NULL, 0, 1, 0,
"skip image format conversion - cheaper but not 100%
correct" )
And in a bit more detail, also from the source:
Advanced tvtime/deinterlacer plugin with pulldown detection
This plugin aims to provide deinterlacing mechanisms comparable
to high quality progressive DVD players and so called
line-doublers, for use with computer monitors, projectors and
other progressive display devices.
Parameters:
Method: Select deinterlacing method/algorithm to use, see below for
explanation of each method.
Enabled: Enable/disable the plugin.
Pulldown: Choose the 2-3 pulldown detection algorithm. 24 FPS films
that have being converted to NTSC can be detected and intelligently
reconstructed to their original (non-interlaced) frames.
Framerate_mode: Selecting 'full' will deinterlace every field
to an unique frame for television quality and beyond. This feature will
effetively double the frame rate, improving smoothness. Note, however,
that full 59.94 FPS is not possible with plain 2.4 Linux kernel (that
use a timer interrupt frequency of 100Hz). Newer RedHat and 2.6 kernels
use higher HZ settings (512 and 1000, respectively) and should work fine.
Judder_correction: Once 2-3 pulldown is enabled and a film material
is detected, it is possible to reduce the frame rate to original rate
used (24 FPS). This will make the frames evenly spaced in time,
matching the speed they were shot and eliminating the judder effect.
Use_progressive_frame_flag: Well mastered MPEG2 streams uses a flag
to indicate progressive material. This setting control whether we trust
this flag or not (some rare and buggy mpeg2 streams set it wrong).
Chroma_filter: DVD/MPEG2 use an interlaced image format that has
a very poor vertical chroma resolution. Upsampling the chroma for
purposes of deinterlacing may cause some artifacts to occur (eg. color
stripes). Use this option to blur the chroma vertically after
deinterlacing to remove the artifacts. Warning: cpu intensive.
Cheap_mode: This will skip the expensive YV12->YUY2 image conversion,
tricking tvtime/dscaler routines like if they were still handling YUY2
images. Of course, this is not correct, not all pixels will be evaluated
by the algorithms to decide the regions to deinterlace and chroma will
be processed separately. Nevertheless, it allows people with not so fast
systems to try deinterlace algorithms, in a tradeoff between quality
and cpu usage.
One conclusion is that Judder_correction and Pulldown are useless for
PAL material. Use_progressive_frame_flag is also quite futile with DVB
material, but some DVDs might benefit from it.
-Petri
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