FATE test ffprobe_xsd fails

[Marcus B Spencer]

Summary of the bug:

When running FATE, the ffprobe_xsd test fails with:

--- ./tests/ref/fate/ffprobe_xsd        2025-04-30 12:06:47.800514802 -0500
+++ tests/data/fate/ffprobe_xsd 2025-04-30 15:13:35.099352118 -0500
@@ -36,7 +36,7 @@
             <disposition default="0" dub="0" original="0" comment="0" lyrics="0" karaoke="0" forced="0" hearing_impaired="0" visual_impaired="0" clean_effects="0" attached_pic="0" timed_thumbnails="0" non_diegetic="0" captions="0" descriptions="0" metadata="0" dependent="0" still_image="0" multilayer="0"/>
             <tags>
                 <tag key="encoder" value="Lavc pcm_s16le"/>
-                <tag key="E" value="mc²"/>
+                <tag key="E" value="mc&#xB2;"/>
             </tags>
         </stream>
         <stream index="1" codec_name="rawvideo" codec_type="video" codec_tag_string="RGB[24]" codec_tag="0x18424752" width="320" height="240" coded_width="320" coded_height="240" has_b_frames="0" sample_aspect_ratio="1:1" display_aspect_ratio="4:3" pix_fmt="rgb24" level="-99" refs="1" r_frame_rate="25/1" avg_frame_rate="25/1" time_base="1/51200" start_pts="0" start_time="0.000000" nb_read_frames="4" nb_read_packets="4">
@@ -59,7 +59,7 @@
         <tags>
             <tag key="title" value="ffprobe test file"/>
             <tag key="comment" value="'A comment with CSV, XML &amp; JSON special chars': &lt;tag value=&quot;x&quot;&gt;"/>
-            <tag key="comment2" value="I ♥ Üñîçød€"/>
+            <tag key="comment2" value="I &#x2665; &#xDC;&#xF1;&#xEE;&#xE7;&#xF8;d&#x20AC;"/>
         </tags>
     </format>
 </ffprobe:ffprobe>
Test ffprobe_xsd failed. Look at tests/data/fate/ffprobe_xsd.err for details.
make: *** [tests/Makefile:316: fate-ffprobe_xsd] Error 1

tests/data/fate/ffprobe_xsd.err:

ffprobe version N-119396-g48c0dba23b Copyright (c) 2007-2025 the FFmpeg developers
  built with gcc 15.1.1 (GCC) 20250425
  configuration: --samples=../ffmpeg-samples --enable-gpl --cc=gcc
  libavutil      60.  2.100 / 60.  2.100
  libavcodec     62.  1.102 / 62.  1.102
  libavformat    62.  0.102 / 62.  0.102
  libavdevice    62.  0.100 / 62.  0.100
  libavfilter    11.  0.100 / 11.  0.100
  libswscale      9.  0.100 /  9.  0.100
  libswresample   6.  0.100 /  6.  0.100
  libpostproc    59.  1.100 / 59.  1.100
Input #0, nut, from '/home/marcus/Downloads/ffmpeg-stuff/ffmpeg/tests/data/ffprobe-test.nut':
  Metadata:
    title           : ffprobe test file
    comment         : 'A comment with CSV, XML & JSON special chars': <tag value="x">
    comment2        : I ♥ Üñîçød€
  Duration: 00:00:00.12, start: 0.000000, bitrate: 70243 kb/s
  Stream #0:0: Audio: pcm_s16le (PSD[16] / 0x10445350), 44100 Hz, 1 channels, s16, 705 kb/s
    Metadata:
      encoder         : Lavc pcm_s16le
      E               : mc²
  Stream #0:1: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 51200 tbn (default)
    Metadata:
      encoder         : Lavc rawvideo
      title           : foobar
      duration_ts     : field-and-tags-conflict-attempt
  Stream #0:2: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 100x100, SAR 1:1 DAR 1:1, 25 fps, 25 tbr, 51200 tbn
    Metadata:
      encoder         : Lavc rawvideo
- validates
threads=1

How to reproduce:

Go into a git tree of current master and run (this will destroy previous build configuration):

make distclean
./configure --samples=../ffmpeg-samples --enable-gpl --cc=gcc
make fate-rsync
make -j8
make fate

[Marton Balint]

This is likely an issue with your version of xmllint which for some reason escapes unicode chars even if the used encoding is UTF-8. Not sure what can be done about this. Can you provide information about your system (OS version) and xmllint --version ?

[Marcus B Spencer]

xmllint --version:

xmllint: using libxml version 21403-GITv2.14.3
   compiled with: Threads Tree Output Push Reader Patterns Writer SAXv1 HTTP DTDValid HTML C14N Catalog XPath XPointer XInclude Iconv ICU ISO8859X Regexps Automata RelaxNG Schemas Schematron Modules Debug Zlib Lzma 

System is Arch Linux with multilib and testing repositories enabled.

Although this info probably doesn't matter anymore since an update (probably ​libxml2 2.14.3-1) made the problem go away.