On 23/07/2009, at 8:33 AM, Chris Birch wrote:
Dear libav users,
I'd be grateful for any pointers, hints or tips anyone can give me,
I've been struggling with this problem for a month now!
My goal is to write DNX36 video essence created from a stream of
RGB48p video data. The steps I'm following are:
1. Crop 48 bit planar RGB video from 2048 x 1152 to 1920 x 1080
2. Convert to YUV422p by taking the most significant byte for each
pixel from each RGB plane and performing the standard calculations
to create YUV and copy the Y value to it's plane each time and the
UV values to their planes every other pixel.
3. I then pass my YUV422p from to avcodec_encode_video() with a
context that's been setup and the codec successfully opened.
4. The resulting length of the encoded bytes is correct and I write
the data to a file.
Sounds like something more suited to the mjpegutils.
It's designed to work with yuv planar data and y4mscaler may already
support RGB48p.
I have written a player for a yuv 420 stream, using mjpegutils, cocoa
and core video. It shouldn't be difficult to convert to 422, infact
CoreVideo require 422, so I upsample it anyway.
http://silicontrip.net/~mark/lavtools/yuvCoreVideoplay_src.tar.bz2
mplayer supports yuv420p streams, not sure if it supports 422.
yuvplay (part of mjpegutils should support all types of yuv streams)
Mark
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