[BUG] quicktime antics

[sjthespian]

Describe the bug
I have several older Quicktime files that checkrr not recognizing Quicktime files as valid videos. The logs show Type=Unknown:

time="2024-10-07T02:47:32Z" level=info msg="\"/dvdtv/TableTop/Season 01/TableTop - S01E01 - Small World.m4v\"" Hash Match=true
time="2024-10-07T02:47:32Z" level=info msg="File \"/dvdtv/TableTop/Season 01/TableTop - S01E01 - Small World.mov\" is not a recognized file type" FFProbe=false Type=Unknown

In this case, these are files that were downloaded via. Steam from the long-ago Kickstarter for Will Wheaton's TableTop videos.

But ffprobe run from in the container has no trouble with the files:

/ # ffprobe /dvdtv/TableTop/Season\ 01/TableTop\ -\ S01E01\ -\ Small\ World.m
TableTop - S01E01 - Small World.m4v  TableTop - S01E01 - Small World.mov
/ # ffprobe /dvdtv/TableTop/Season\ 01/TableTop\ -\ S01E01\ -\ Small\ World.mov
ffprobe version 6.1.1 Copyright (c) 2007-2023 the FFmpeg developers
  built with gcc 13.2.1 (Alpine 13.2.1_git20231014) 20231014
  configuration: --prefix=/usr --disable-librtmp --disable-lzma --disable-static --disable-stripping --enable-avfilter --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-libmp3lame --enable-libopenmpt --enable-libopus --enable-libplacebo --enable-libpulse --enable-librav1e --enable-librist --enable-libsoxr --enable-libsrt --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-lto=auto --enable-lv2 --enable-openssl --enable-pic --enable-postproc --enable-pthreads --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-vulkan --optflags=-O3 --enable-libjxl --enable-libsvtav1 --enable-libvpl
  libavutil      58. 29.100 / 58. 29.100
  libavcodec     60. 31.102 / 60. 31.102
  libavformat    60. 16.100 / 60. 16.100
  libavdevice    60.  3.100 / 60.  3.100
  libavfilter     9. 12.100 /  9. 12.100
  libswscale      7.  5.100 /  7.  5.100
  libswresample   5.  0.100 /  5.  0.100
  libpostproc    57.  3.100 / 57.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/dvdtv/TableTop/Season 01/TableTop - S01E01 - Small World.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2014-08-08T09:39:00.000000Z
    com.apple.finalcutstudio.media.uuid: 9208E54E-3C8B-44C8-BF04-E752613CF436
    com.apple.finalcutstudio.media.history.uuid: A8F05D7B-B23E-48C9-83B2-7823DB46D7AF
    timecode        : 00:00:00;00
  Duration: 00:29:55.70, start: 0.000000, bitrate: 9326 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 960x720, 9153 kb/s, SAR 4:3 DAR 16:9, 29.97 fps, 29.97 tbr, 2997 tbn (default)
    Metadata:
      creation_time   : 2014-08-08T09:39:00.000000Z
      handler_name    : Apple Video Media Handler
      vendor_id       : appl
      encoder         : H.264
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 168 kb/s (default)
    Metadata:
      creation_time   : 2014-08-08T09:39:00.000000Z
      handler_name    : Apple Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2014-08-08T09:59:09.000000Z
      handler_name    : Time Code Media Handler
      timecode        : 00:00:00;00
Unsupported codec with id 0 for input stream 2

To Reproduce
Steps to reproduce the behavior:

1. Find an older QuickTime file and add it to your library
2. Run a scan
3. See the errors in the log and the file show up in Bad Files

Expected behavior
I would expect checkrr to scan these files just like any other video files.

Screenshots
N/A

Desktop (please complete the following information):

• OS: MacOS, Docker on Linux
• Browser: Chrome and Safari
• checkrr 3.3.0

[aetaric]

It looks like this is likely to be a magic number issue, not an ffprobe issue. checkrr uses h2non/filetype to check if a file is video/audio before passing to ffprobe blindly. That library uses magic numbers to match the file and checks that the extension matches [1]. Honestly, it might make sense to just swap the container type and extension using ffmpeg in this case. Otherwise, h2non/filetype needs to be patched and I've been waiting on them for 2 years on h2non/filetype#120.

[1] https://github.com/h2non/filetype/blob/master/matchers/video.go#L53-L62

[sjthespian]

Ugh, looks like it downloaded new mp4 versions of the files and now I don't have the .mov files in my library any more. File sees it as a Movie file on my Mac, let me dig up my archives of the .mov files and I will see what it does in the container.

Interesting that file also sees it as an ISO though...

❯ file /media/video/DVDs/TV_Shows/TableTop/Season\ 01/TableTop\ -\ S01E01\ -\ Small\ World.mov
/media/video/DVDs/TV_Shows/TableTop/Season 01/TableTop - S01E01 - Small World.mov: ISO Media, Apple QuickTime movie, Apple QuickTime (.MOV/QT)

[aetaric]

If it sees it as ISO media, I suspect it might be directly related to the magic number used.

[aetaric]

@sjthespian did you ever get the original copy of this file? I'm curious to see what ffprobe says about it too