[FFmpeg-trac] #8574(undetermined:new): Cannot pipe WebP images

[FFmpeg]

#8574: Cannot pipe WebP images
-------------------------------------+-------------------------------------
             Reporter:  dsa-t        |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 When trying to pipe WebP images into ffmpeg, it fails.
 Changing {{{analyzeduration}}} and {{{probesize}}} does not help.
 Specifying {{{-f webp_pipe}}} does not help

 When passing the file to {{{-i}}} directly, this works:
 {{{
 ffmpeg -i 1.webp -y -vcodec libx264 test.mp4
 }}}
 Piping JPEG images instead of WebP also works.

 Example image: https://www.gstatic.com/webp/gallery/1.webp

 How to reproduce:
 {{{
 cat 1.webp | ffmpeg -loglevel 99 -analyzeduration 10M -probesize 10M -i
 pipe:0 -y -vcodec libx264 test.mp4

 ffmpeg version N-96981-g39fbd06 Copyright (c) 2000-2020 the FFmpeg
 developers
   built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
   configuration: --prefix=/home/alex/ffmpeg_build --pkg-config-
 flags=--static --extra-cflags=-I/home/alex/ffmpeg_build/include --extra-
 ldflags=-L/home/alex/ffmpeg_build/lib --extra-libs='-lpthread -lm'
 --bindir=/home/alex/bin --enable-gpl --enable-libass --enable-libfdk-aac
 --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-
 libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-
 nonfree --enable-libwebp
   libavutil      56. 42.100 / 56. 42.100
   libavcodec     58. 75.100 / 58. 75.100
   libavformat    58. 41.100 / 58. 41.100
   libavdevice    58.  9.103 / 58.  9.103
   libavfilter     7. 77.100 /  7. 77.100
   libswscale      5.  6.101 /  5.  6.101
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
 Splitting the commandline.
 Reading option '-loglevel' ... matched as option 'loglevel' (set logging
 level) with argument '99'.
 Reading option '-analyzeduration' ... matched as AVOption
 'analyzeduration' with argument '10M'.
 Reading option '-probesize' ... matched as AVOption 'probesize' with
 argument '10M'.
 Reading option '-i' ... matched as input url with argument 'pipe:0'.
 Reading option '-y' ... matched as option 'y' (overwrite output files)
 with argument '1'.
 Reading option '-vcodec' ... matched as option 'vcodec' (force video codec
 ('copy' to copy stream)) with argument 'libx264'.
 Reading option 'test.mp4' ... matched as output url.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option loglevel (set logging level) with argument 99.
 Applying option y (overwrite output files) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input url pipe:0.
 Successfully parsed a group of options.
 Opening an input file: pipe:0.
 [NULL @ 0x55c59fc97b80] Opening 'pipe:0' for reading
 [pipe @ 0x55c59fc98b40] Setting default whitelist 'crypto,data'
 Probing webp_pipe score:99 size:2048
 [webp_pipe @ 0x55c59fc97b80] Format webp_pipe probed with size=2048 and
 score=99
 [webp_pipe @ 0x55c59fc97b80] Before avformat_find_stream_info() pos: 0
 bytes read:30320 seeks:0 nb_streams:1
 [webp_pipe @ 0x55c59fc97b80] parser not found for codec webp, packets or
 times may be invalid.
 [webp_pipe @ 0x55c59fc97b80] stream 0: start_time: -368934881474191040.000
 duration: -368934881474191040.000
 [webp_pipe @ 0x55c59fc97b80] format: start_time: -9223372036854.775
 duration: -9223372036854.775 (estimate from bit rate) bitrate=0 kb/s
 [webp_pipe @ 0x55c59fc97b80] Could not find codec parameters for stream 0
 (Video: webp, 1 reference frame, none): unspecified size
 Consider increasing the value for the 'analyzeduration' and 'probesize'
 options
 [webp_pipe @ 0x55c59fc97b80] After avformat_find_stream_info() pos: 0
 bytes read:30320 seeks:0 frames:0
 Input #0, webp_pipe, from 'pipe:0':
   Duration: N/A, bitrate: N/A
     Stream #0:0, 0, 1/25: Video: webp, 1 reference frame, none, 25 tbr, 25
 tbn, 25 tbc
 Successfully opened the file.
 Parsing a group of options: output url test.mp4.
 Applying option vcodec (force video codec ('copy' to copy stream)) with
 argument libx264.
 Successfully parsed a group of options.
 Opening an output file: test.mp4.
 Output #0, mp4, to 'test.mp4':
 Output file #0 does not contain any stream
 [AVIOContext @ 0x55c59fc98e80] Statistics: 30320 bytes read, 0 seeks
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8574>
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