UPDATE:
Tried recommended command from Neckbeard:
ffmpeg -analyzeduration 10M -probesize 10M -i Webpfile.webp -c:v libx264 output.mp4
Here's the output (file paths generalized):
User-macbookpro:~ User$ ffmpeg -analyzeduration 10M -probesize 10M -i Webpfile.webp -c:v libx264 output.mp4
ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 9.0.0 (clang-900.0.38)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libass --enable-libfdk-aac --enable-libmp3lame --enable-libopenh264 --enable-libopus --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.3.0/include/openjpeg-2.3 --enable-nonfree
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[webp @ 0x7f9920811000] skipping unsupported chunk: ANIM
[webp @ 0x7f9920811000] skipping unsupported chunk: ANMF
Last message repeated 14 times
[webp @ 0x7f9920811000] image data not found
[webp_pipe @ 0x7f9920000e00] decoding for stream 0 failed
[webp_pipe @ 0x7f9920000e00] 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 'webpfile.webp':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: webp, none, 25 tbr, 25 tbn, 25 tbc
File 'output.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (webp (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[webp @ 0x7f9920005e00] skipping unsupported chunk: ANIM
[webp @ 0x7f9920005e00] skipping unsupported chunk: ANMF
Last message repeated 14 times
[webp @ 0x7f9920005e00] image data not found
Error while decoding stream #0:0: Invalid data found when processing input
Finishing stream 0:0 without any data written to it.
Nothing was written into output file 0 (output.mp4), because at least one of its streams received no packets.
frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
Conversion failed!
Currently I'm trying to convert a webp back to an mp4, but getting the error:
Nothing was written into output file 0 (output.mp4), because at least one of its streams received no packets.
Here is the current command I've been using without success:
ffmpeg -i webpfile.webp -c:v libx264 output.mp4
I notice that there are also other errors during processing, calling out
Skipping unsupported chunk: ANIM
Skipping unsupported chunk: ANMF
And
Could not find codec parameters for stream 0 (Video: webp, none): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
What am I doing wrong here? I thought it would be as simple as I had converted a movie to webp, but going the other way seems more nuanced.
ffmpeg -analyzeduration 10M -probesize 10M -loop 1 -t 5 -i webpfile.webp -c:v libx264 output.mp4. 2) Use a recentffmpeg. 3) Show the complete log. 4) Provide a link to the input file. – Delitescenceffmpegfrom evermeet or zeranoe. Try the git versions instead of the 4.0 release version. – Delitescence