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22nd February 2010, 10:37 | #1 | Link | ||
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Question about ffmpeg
Dear all,
I have asked a question about encoding step by using ffmpeg. Now the problem is decoding. Whatever I do, I got always "could not find codec parameters", For encoding, Quote:
I have tried Quote:
Another question is, rawvideo means 4:0:0 or 4:2:2 ? |
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22nd February 2010, 11:11 | #2 | Link | ||
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You have to put the resolution, framerate and colorspace for the raw file before the -i parameter. This way FFmpeg knows how to apply them correctly:
Quote:
For a list of the colorspaces execute: ffmpeg -pix_fmt list Quote:
4:2:2 and 4:2:0 is the notation for chroma subsampling used in YUV, it says how many pixels share the same color information.
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22nd February 2010, 11:54 | #3 | Link | |||
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Quote:
I used for encoding: Quote:
Quote:
My file sizes are: out_1.bmp: 1095 KB out_2.bmp: 1095 KB output.yuv: 2190 KB out1_1.bmp: 3282 KB ??? |
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22nd February 2010, 14:26 | #4 | Link | |
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Join Date: Apr 2009
Location: Switzerland
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You can convert your bmps to yuv400p with the same pix_fmt parameter:
Quote:
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