Description:
General discussion of the WebM project.
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ffvp8 vs libvpx
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Hi all, Is ffvp8 still faster than libvpx on multicore processors(ex : cortex-a9 omap 4430 panda board )? what is the method to measure performance of both ? Any help is appreciated. Regards, Satish
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WebM playback at 4x speed (sample rate conversion problem?)
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Hi, I'm having a problem where WebM playback on any youtube WebM video
happens at 4x speed when using Chrome, but plays back normally when
using Mozilla.
Are there any differences in the versions of WebM used by Chrome and
Firefox that could be causing this? Or, if it sounds like this isn't
a problem with WebM any suggestions of where to look next to find the... more »
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VP8 + alpha channel
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I need to play video files with alpha channel. I've built and linked
VP8 decoder. According to variety of guides, it supports alpha
channel.
But in fact, it wasn't possible to convert video to webm format with
alpha channel preserved (using ffmpeg/libvpx). Source files definitely
contain alpha channel. But no matter which format do I choose in... more »
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VP8 config FPS, Width and Height with DirectShow
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Hy,
I´m using the vp8encoderidl.h with its IVP8Encoder Interface to
configure my
VP8 Encoder in my DirectShow Application.
SetTargetBitrate I found, but I cant find the Settings for FPS, Width
and Height.
What am I missing?
Thanks for help
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vp8 probabilty models.
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Hi,
I see that in case of VP8 probabilty models are updated across the
frames unlike h264(limited within slice).
Is it done for better probabilty estimate?
Second I observed that we are sending full probabilties in frame
headers incase of different probility updates. Can't we send only
difference of probabilties for more compression. For simplicity... more »
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Initialization cfg.rc_target_bitrate
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Hello there,
I am running simple encoder.
There is an parameter cfg.rc_target_bitrate tha initializes to 256.
When,how and where at the code happens this initialization?
Thank you
Damianos Kalanidis
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About Decode WebM frame
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Hi All,
My application running on Android 4.0 and it will be getting WebM
Decoded data from Windows , linux and may be from Mac,
but of different frame size, like 320X240, 640X480 , 1280X960 etc....
due to performance reason, i would like to decode at smaller frame
size i.e. 320X240, i.e. whatever be the bitstream, but let me get the... more »
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