AW: Lossless Codec for Gray 8-Bit and Matroska

[Horst Huchen]

I came to the conclusion using Motionjpeg (jpegenc) and Matroska with
grayscale videos and setting the quality to 100.
It's not lossless, but I hope it has enough quality for my effort.

Maybe it's possible to develop an grayscale version of the huffyuv Encoder,
but I don't know anything about the huffyuv encoding algorithm.



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[mailto:gstreamer-devel-bounces+horsthuchen=googlemail.com at lists.freedesktop
.org] Im Auftrag von pfarmer
Gesendet: Donnerstag, 2. Februar 2012 14:53
An: gstreamer-devel at lists.freedesktop.org
Betreff: Re: Lossless Codec for Gray 8-Bit and Matroska

I think there is none available. Since I was searching as well.
Matroskamux accepts the following:
video/x-raw-yuv format: { YUY2, I420, YV12, UYVY, AYUV }, video/x-huffyuv,
video/x-dirac So just huffman and dirac compression.
The only dirac encoder I know is diracenc, which accepts only
video/x-raw-yuv format: { I420, YUY2, UYVY, AYUV } The only huffman encoders
I could find were: ffenc_ffvhuff and ffenc_huffyuv.
Both stating as capabilities: video/x-raw-rgb, video/x-raw-yuv,
video/x-raw-gray But none of them supporting the video/x-raw-gray streams
(like your ffenc_vhuff and ffenc_ffv1 encoders)

I would be interested also in any encoder capable for video/x-raw-gray
streams suitable also for other container formats. If anybody knows please
let me know


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