[FFmpeg-trac] #9994(undetermined:new): ffmpeg 5.1 cli changed how it interprets percent signs in output file urls
FFmpeg
trac at avcodec.org
Thu Oct 27 23:12:42 EEST 2022
#9994: ffmpeg 5.1 cli changed how it interprets percent signs in output file urls
-------------------------------------+-------------------------------------
Reporter: mkhl | Owner: (none)
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Description changed by mkhl:
Old description:
> Summary of the bug:
> in ffmpeg 5.0 one had to "escape" percent signs in output file urls, so
> instead of {{{100%.png}}} one had to pass {{{100%%.png}}}.
> in ffmpeg 5.1 this changed and percent signs are now interpreted
> literally, and i can't find any documentation regarding whether this
> change was intentional or which variant people should use.
>
> See also:
> [https://github.com/yt-dlp/yt-dlp/issues/4604 yt-dlp issue about how it's
> affected by this bug]
>
> How to reproduce:
> {{{
> % convert xc:#ffffff -size 1x1 white.png # so there's any image
> % ffmpeg -y -loglevel repeat+info -f image2 -pattern_type none -i
> 'file:white.png' -movflags +faststart 'file:x%%.webp'
> ffmpeg version n5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
> built with gcc 12.2.0 (GCC)
> configuration: --prefix=/usr --disable-debug --disable-static
> --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm
> --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-
> gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray
> --enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libfreetype
> --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack
> --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-
> libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg
> --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg
> --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh
> --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-
> libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-
> libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-
> libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc
> --enable-opencl --enable-opengl --enable-shared --enable-version3
> --enable-vulkan
> libavutil 57. 28.100 / 57. 28.100
> libavcodec 59. 37.100 / 59. 37.100
> libavformat 59. 27.100 / 59. 27.100
> libavdevice 59. 7.100 / 59. 7.100
> libavfilter 8. 44.100 / 8. 44.100
> libswscale 6. 7.100 / 6. 7.100
> libswresample 4. 7.100 / 4. 7.100
> libpostproc 56. 6.100 / 56. 6.100
> Input #0, image2, from 'file:white.png':
> Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
> Stream #0:0: Video: png, monob(pc), 1x1, 25 fps, 25 tbr, 25 tbn
> Stream mapping:
> Stream #0:0 -> #0:0 (png (native) -> webp (libwebp_anim))
> Press [q] to stop, [?] for help
> Output #0, webp, to 'file:x%%.webp':
> Metadata:
> encoder : Lavf59.27.100
> Stream #0:0: Video: webp, bgra(pc, gbr/unknown/unknown, progressive),
> 1x1, q=2-31, 200 kb/s, 25 fps, 1k tbn
> Metadata:
> encoder : Lavc59.37.100 libwebp_anim
> [libwebp_anim @ 0x562536100940] Using libwebp for RGB-to-YUV conversion.
> You may want to consider passing in YUV instead for lossy encoding.
> frame= 1 fps=0.0 q=-0.0 Lsize= 0kB time=00:00:00.00 bitrate=
> 352.0kbits/s speed=0.177x
> }}}
>
> with 5.0 this would create a file {{{x%.webp}}}, with 5.1 it creates
> {{{x%%.webp}}} instead
New description:
Summary of the bug:
in ffmpeg 5.0 one had to "escape" percent signs in output file urls, so
instead of {{{100%.png}}} one had to pass {{{100%%.png}}}.
in ffmpeg 5.1 this changed and percent signs are now interpreted
literally, and i can't find any documentation regarding whether this
change was intentional or which variant people should use.
See also:
[https://github.com/yt-dlp/yt-dlp/issues/4604 yt-dlp issue about how it's
affected by this bug]
How to reproduce:
{{{
% convert xc:#ffffff -size 1x1 white.png # so there's any image
% ffmpeg -y -loglevel repeat+info -f image2 -pattern_type none -i
'file:white.png' -movflags +faststart 'file:x%%.webp'
ffmpeg version n5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.2.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-
stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto
--enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-
ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b
--enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx
--enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb
--enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-
libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-
libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-
libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-
libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg
--enable-nvdec --enable-nvenc --enable-opencl --enable-opengl --enable-
shared --enable-version3 --enable-vulkan
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, image2, from 'file:white.png':
Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, monob(pc), 1x1, 25 fps, 25 tbr, 25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> webp (libwebp_anim))
Press [q] to stop, [?] for help
Output #0, webp, to 'file:x%%.webp':
Metadata:
encoder : Lavf59.27.100
Stream #0:0: Video: webp, bgra(pc, gbr/unknown/unknown, progressive),
1x1, q=2-31, 200 kb/s, 25 fps, 1k tbn
Metadata:
encoder : Lavc59.37.100 libwebp_anim
[libwebp_anim @ 0x562536100940] Using libwebp for RGB-to-YUV conversion.
You may want to consider passing in YUV instead for lossy encoding.
frame= 1 fps=0.0 q=-0.0 Lsize= 0kB time=00:00:00.00 bitrate=
352.0kbits/s speed=0.177x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.000000%
}}}
with 5.0 this would create a file {{{x%.webp}}}, with 5.1 it creates
{{{x%%.webp}}} instead
--
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9994#comment:1>
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