AVC to Animated WEBP

[jay123210599]

How do I convert an AVC video to a lossless animated webp file, and make the output have the same colors as the input?

Video information:

Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Format settings, Slice count             : 4 slices per frame
Codec ID                                 : V_MPEG4/ISO/AVC
Bit rate mode                            : Variable
Bit rate                                 : 21.6 Mb/s
Maximum bit rate                         : 39.0 Mb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.435
Time code of first frame                 : 00:59:59:00
Stream size                              : 3.70 GiB (85%)
Language                                 : English
Default                                  : No
Forced                                   : No
Original source medium                   : Blu-ray

[GeoffreyA]

Give this a go and see if it works:

ffmpeg -i INPUT -c:v libwebp_anim -lossless 1 OUTPUT.webp

Here is the help from FFmpeg:

Encoder libwebp_anim [libwebp WebP image]:
    General capabilities: dr1 delay
    Threading capabilities: none
    Supported pixel formats: bgra yuv420p yuva420p
libwebp encoder AVOptions:
  -lossless          <int>        E..V....... Use lossless mode (from 0 to 1) (default 0)
  -preset            <int>        E..V....... Configuration preset (from -1 to 5) (default none)
     none            -1           E..V....... do not use a preset
     default         0            E..V....... default preset
     picture         1            E..V....... digital picture, like portrait, inner shot
     photo           2            E..V....... outdoor photograph, with natural lighting
     drawing         3            E..V....... hand or line drawing, with high-contrast details
     icon            4            E..V....... small-sized colorful images
     text            5            E..V....... text-like
  -cr_threshold      <int>        E..V....... Conditional replenishment threshold (from 0 to INT_MAX) (default 0)
  -cr_size           <int>        E..V....... Conditional replenishment block size (from 0 to 256) (default 16)
  -quality           <float>      E..V....... Quality (from 0 to 100) (default 75)

[jay123210599]

@GeoffreyA I got this:

[libwebp_anim @ 0000022da2913a40] Using libwebp for YUV-to-RGB conversion. You may want to consider passing in RGB instead for lossless encoding.

How do I remove this warning?

[Z2697]

Originally Posted by Z2697

If you want control over this conversion you can use -vf zscale=min=709[:d=ordered],format=gbrap

Dude...

[GeoffreyA]

Originally Posted by jay123210599

@GeoffreyA I got this:

[libwebp_anim @ 0000022da2913a40] Using libwebp for YUV-to-RGB conversion. You may want to consider passing in RGB instead for lossless encoding.

How do I remove this warning?

Adding Z2697's suggestion eliminates the warning:

ffmpeg -i INPUT -vf zscale=min=709,format=gbrap -c:v libwebp_anim -lossless 1 OUTPUT.webp

Having said that, does the use case mandate WebP?