[FFmpeg-trac] #11522(avformat:new): Path URIs are not decoded

[FFmpeg]

#11522: Path URIs are not decoded
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  helpimnotdrowning                  |
               Status:  new          |                 Priority:  normal
            Component:  avformat     |                  Version:
                                     |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 I originally discovered this when trying to play a video in SMPlayer using
 the mpv backend, though this can be reproduced with ff* tools.

 When trying to open a file with a URI-encoded URI, ffmpeg will fail to
 read the file. From https://github.com/mpv-player/mpv/issues/10103 , I was
 pointed to avformat being the issue (though I wasn't able to find this
 person's issue here).


 How to reproduce:
 In my case, URIs are coming encoded from KDE's Dolphin trying to open a
 remote (sftp) file in SMPlayer that contained a "#" in its path. In
 ffprobe, the error is
 {{{
 $ ffprobe 'sftp://helpimnotdrowning@192.168.1.243:22/mnt/W/URUHA RUSHIA CH
 - ARCHIVE/Rushia Ch. 潤羽るしあ/20191130 - 【%23潤羽るしあ3D】潤羽るし あ
 3Dお披露目です！【ホロライブ】/20191130 - 【%23潤羽るしあ3D】潤羽るしあ3D
 お披露目です！【ホロライブ】 [aBGaFFIP9bs].mkv'
 [...]
 [libssh @ 0x7fb370001900] Error opening sftp file: SFTP server: No such
 file
 sftp://helpimnotdrowning@192.168.1.243:22/mnt/W/URUHA RUSHIA CH -
 ARCHIVE/Rushia Ch. 潤羽るしあ/20191130 - 【%23潤羽るしあ3D】潤羽るしあ3Dお
 披露目です！【ホロライブ】/20191130 - 【%23潤羽るしあ3D】潤羽るしあ3Dお披
 露目です！【ホロライブ】 [aBGaFFIP9bs].mkv: Input/output error
 }}}
 When I reference a local file with the file: protocol, this issue also
 persists.


 When the "%23"s are manually switched out with "#", ffprobe will correctly
 read the file.
 {{{
 $ ffprobe 'sftp://helpimnotdrowning@192.168.1.243:22/mnt/W/URUHA RUSHIA CH
 - ARCHIVE/Rushia Ch. 潤羽るしあ/20191130 - 【#潤羽るしあ3D】潤羽るしあ3Dお
 披露目です！【ホロライブ】/20191130 - 【#潤羽るしあ3D】潤羽るしあ3Dお披露
 目です！【ホロライブ】 [aBGaFFIP9bs].mkv'
 [...]
 Input #0, matroska,webm, from 'sftp://helpi[...]
 }}}

 This occurs under ffmpeg 5.1.6 for Debian Stable and a gyan.dev ffmpeg 7
 build for Windows.

 Though I am not one to read through RFCs, the linked mpv issue mentions
 that URIs using reserved characters (like the #) should always percent-
 encode/URI encode those characters (https://github.com/mpv-
 player/mpv/issues/10103#issuecomment-1101352451 ), of which avformat seems
 to break.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11522>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker