The problem about gif2webp and webp convert to gif

[songmeng...@gmail.com]

Hello，now I can use gif2webp to convert gif to webp, but what can I use convert webp to gif?

Thanks for answer, no matter whether it can or can not.

[Urvang Joshi]

Currently, there isn't an easy way to convert a WebP to GIF. I'm planning to add animated WebP decoding support in ffmpeg in near future to make that possible.

On Tue, Jun 23, 2015 at 4:05 AM <songmeng...@gmail.com> wrote:

Hello，now I can use gif2webp to convert gif to webp, but what can I use convert webp to gif?

Thanks for answer, no matter whether it can or can not.

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[Vlastimil Miléř]

if you run on Windows, you can use
http://download.rw-designer.com/1.0/webp2gif.exe

[songmeng...@gmail.com]

If I want to solve this by coding, can you give me some advise? 

Thanks for your anser .

在 2015年6月25日星期四 UTC+8下午11:09:24，vlasta写道：

[Greg Miernicki]

Has this support landed in ffmpeg yet?

It seems from the output below (from a ffmpeg today on trunk) that it has not:

ffmpeg -i 21.webp 21.gif
ffmpeg version N-82846-gf0bdd53 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --enable-libopus --enable-libvpx --enable-gpl --enable-libx264 --extra-libs=-ldl --enable-libmp3lame --disable-yasm --enable-libfdk_aac --enable-nonfree --enable-libwebp --enable-filter=drawtext --enable-libfreetype --enable-libass
  libavutil      55. 43.100 / 55. 43.100
  libavcodec     57. 67.100 / 57. 67.100
  libavformat    57. 59.100 / 57. 59.100
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 68.100 /  6. 68.100
  libswscale      4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
[webp @ 0x2bea460] skipping unsupported chunk: ANIM
[webp @ 0x2bea460] skipping unsupported chunk: ANMF
    Last message repeated 22 times
[webp @ 0x2bea460] image data not found
[webp_pipe @ 0x2be89c0] decoding for stream 0 failed
[webp_pipe @ 0x2be89c0] Could not find codec parameters for stream 0 (Video: webp, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, webp_pipe, from '21.webp':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: webp, none, 25 tbr, 25 tbn, 25 tbc
[buffer @ 0x2c0b160] Unable to parse option value "0x0" as image size
[buffer @ 0x2c0b160] Unable to parse option value "-1" as pixel format
[buffer @ 0x2c0b160] Unable to parse option value "0x0" as image size
[buffer @ 0x2c0b160] Error setting option video_size to value 0x0.
[graph 0 input from stream 0:0 @ 0x2c0b060] Error applying options to the filter.
Error opening filters!

[James Zern]

Hi,

On Tuesday, December 13, 2016 at 9:54:23 AM UTC-8, Greg Miernicki wrote:

Has this support landed in ffmpeg yet?

It seems from the output below (from a ffmpeg today on trunk) that it has not:

That's correct, this is still open:

https://trac.ffmpeg.org/ticket/4907