#11526: cmfv and cmfa not in hls allowed_extensions
------------------------------------+------------------------------------
Reporter: gamer191 | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+------------------------------------
Description changed by gamer191:
Old description:
> Summary of the bug:
> Cmfv and cmfa are not in ffmpeg's HLS demuxer's list of
> allowed_extensions. This causes issues when downloading niconico videos
> using yt-dlp.
>
> This can be reproduced with `yt-dlp
> "https://www.nicovideo.jp/watch/sm44612421"; --downloader ffmpeg` (the
> cmfa issue can be reproduced using `yt-dlp
> "https://www.nicovideo.jp/watch/sm44612421"; --downloader ffmpeg -f
> bestaudio`). Alternatively, you can create a .m3u8 file containing
> {{{
> #EXTM3U
> #EXT-X-TARGETDURATION:174
> #EXTINF:135,
> https://example.com/file.cmfv
> }}}
> and then run
> {{{
> % ffmpeg -i file.m3u8
> ffmpeg version N-118897-gfc44ccd981-20250323 Copyright (c) 2000-2025 the
> FFmpeg developers
> built with gcc 14.2.0 (crosstool-NG 1.27.0.18_7458341)
> configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
> --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
> --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
> --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib
> --enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2
> --enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis
> --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb
> --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-
> avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2
> --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-
> ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
> libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray
> --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
> --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
> --enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-
> libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
> --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-
> librubberband --enable-schannel --enable-sdl2 --enable-libsnappy
> --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame
> --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab
> --enable-vulkan --enable-libshaderc --enable-libplacebo --disable-
> libvvenc --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-
> libxvid --enable-libzimg --enable-libzvbi --extra-
> cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-
> ldflags=-pthread --extra-ldexeflags= --cc=x86_64-w64-mingw32-gcc
> --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar
> --ranlib=x86_64-w64-mingw32-gcc-ranlib --nm=x86_64-w64-mingw32-gcc-nm
> --extra-version=20250323
> libavutil 59. 60.100 / 59. 60.100
> libavcodec 61. 33.102 / 61. 33.102
> libavformat 61. 9.107 / 61. 9.107
> libavdevice 61. 4.100 / 61. 4.100
> libavfilter 10. 9.100 / 10. 9.100
> libswscale 8. 13.103 / 8. 13.103
> libswresample 5. 4.100 / 5. 4.100
> libpostproc 58. 4.100 / 58. 4.100
> [hls @ 00000257b8f1be40] URL https://example.com/file.cmfv is not in
> allowed_extensions
> [in#0 @ 00000257b8eb9f40] Error opening input: Invalid data found when
> processing input
> Error opening input file C:\Users\REDACTED\file.m3u8.
> Error opening input files: Invalid data found when processing input
> }}}
> Patches should be submitted to the ffmpeg-devel mailing list and not this
> bug tracker.
New description:
Summary of the bug:
Cmfv and cmfa are not in ffmpeg's HLS demuxer's list of
allowed_extensions. This causes issues when downloading niconico videos
using yt-dlp.
This can be reproduced with `yt-dlp
"https://www.nicovideo.jp/watch/sm44612421"; --downloader ffmpeg` (the cmfa
issue can be reproduced using `yt-dlp
"https://www.nicovideo.jp/watch/sm44612421"; --downloader ffmpeg -f
bestaudio`). Alternatively, you can create a .m3u8 file containing
{{{
#EXTM3U
#EXT-X-TARGETDURATION:174
#EXTINF:135,
https://example.com/file.cmfv
}}}
and then run
{{{
% ffmpeg -v 9 -loglevel 99 -i "C:\Users\REDACTED\file.m3u8"
ffmpeg version N-118897-gfc44ccd981-20250323 Copyright (c) 2000-2025 the
FFmpeg developers
built with gcc 14.2.0 (crosstool-NG 1.27.0.18_7458341)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-zlib
--enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2
--enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis
--enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb
--disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-
avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2
--enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-
ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray
--enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
--enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
--enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
--enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-
librubberband --enable-schannel --enable-sdl2 --enable-libsnappy --enable-
libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-
libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-
vulkan --enable-libshaderc --enable-libplacebo --disable-libvvenc
--enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid
--enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC
--extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-
ldexeflags= --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++
--ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib
--nm=x86_64-w64-mingw32-gcc-nm --extra-version=20250323
libavutil 59. 60.100 / 59. 60.100
libavcodec 61. 33.102 / 61. 33.102
libavformat 61. 9.107 / 61. 9.107
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 9.100 / 10. 9.100
libswscale 8. 13.103 / 8. 13.103
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-i' ... matched as input url with argument
'C:\Users\REDACTED\file.m3u8'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input url C:\Users\REDACTED\file.m3u8.
Successfully parsed a group of options.
Opening an input file: C:\Users\REDACTED\file.m3u8.
[AVFormatContext @ 0000022059d7de40] Opening 'C:\Users\REDACTED\file.m3u8'
for reading
[file @ 0000022059d29380] Setting default whitelist 'file,crypto,data'
Probing hls score:100 size:77
[hls @ 0000022059d7de40] Format hls probed with size=2048 and score=100
[hls @ 0000022059d7de40] URL https://example.com/file.cmfv is not in
allowed_extensions
[AVIOContext @ 0000022059d37c40] Statistics: 77 bytes read, 0 seeks
[in#0 @ 0000022059d38480] Error opening input: Invalid data found when
processing input
Error opening input file C:\Users\REDACTED\file.m3u8.
Error opening input files: Invalid data found when processing input
}}}
Patches should be submitted to the ffmpeg-devel mailing list and not this
bug tracker.
--
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11526#comment:1>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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