[FFmpeg-user] 422 to 444 Upsampling Testbed
vincent at up4.com
Sun Apr 28 22:39:44 CEST 2013
I'm using the latest from Github.
I'm looking for a way to study of the rescaling/resampling algorithms of FFMPEG and for this I would like to be able to output for a frame from a 422 video to separate PNG files:
- the composite YUV image (in RGB)
- the Y luma (grayscale)
- the U chroma (grayscale)
- the V chroma (grayscale)
I found the "Fancy Filtering Examples" in the wiki and I tried to adapt the example to my needs but:
1) couldn't get the separate files: "Could not get frame filename number 2 from pattern 'y.png' (either set updatefirst or use a pattern like %03d within the filename pattern)"
2) couldn't get the chroma channels (U&V) as grayscale images
Can anyone help?
More information about the ffmpeg-user