Inconsistent handling of Matroska LanguageIETF for Audio vs Text tracks (en-US)
Description
MediaInfo appears to handle the Matroska LanguageIETF value en-US differently depending on the track type.
In the attached sample, both Audio and Text tracks contain the correct Matroska IETF language tag.
mkvmerge -J reports:
{
"id": 1,
"language": "eng",
"language_ietf": "en-US",
"title": "English (US) | Opus 5.1 @ 392 kbps"
}However, MediaInfo reports:
Audio track:
{
"ID": "2",
"Title": "English (US) | Opus 5.1 @ 392 kbps",
"Language": "en"
}while subtitle tracks in the same file are reported as:
{
"ID": "11",
"Title": "English (US)",
"Language": "en-US"
}and:
{
"ID": "12",
"Title": "English (US) (SDH)",
"Language": "en-US"
}Expected behaviour
I would expect the same LanguageIETF value to be reported consistently regardless of track type.
Since the Matroska file contains:
for the audio track, I would expect MediaInfo to report:
for Audio tracks as well.
Actual behaviour
- Audio track:
en-US is reported as en
- Text track:
en-US is reported as en-US
Additional observations
In the same file, another audio track is reported correctly:
{
"ID": "3",
"Title": "Portuguese (European) | Opus 5.1 @ 389 kbps",
"Language": "pt-PT"
}Therefore the behaviour does not seem to affect all IETF language tags equally.
Environment
MediaInfo:
MediaInfo Command line,
MediaInfoLib - v26.01
mkvmerge:
mkvmerge v99.0 ('Buka') 64-bit
mkvmerge output
{
"id": 1,
"language": "eng",
"language_ietf": "en-US",
"title": "English (US) | Opus 5.1 @ 392 kbps"
}
{
"id": 2,
"language": "por",
"language_ietf": "pt-PT",
"title": "Portuguese (European) | Opus 5.1 @ 389 kbps"
}MediaInfo Audio output
{
"ID": "2",
"Title": "English (US) | Opus 5.1 @ 392 kbps",
"Language": "en"
}
{
"ID": "3",
"Title": "Portuguese (European) | Opus 5.1 @ 389 kbps",
"Language": "pt-PT"
}MediaInfo Text output
{
"ID": "11",
"Title": "English (US)",
"Language": "en-US"
}
{
"ID": "12",
"Title": "English (US) (SDH)",
"Language": "en-US"
}
Inconsistent handling of Matroska LanguageIETF for Audio vs Text tracks (
en-US)Description
MediaInfo appears to handle the Matroska
LanguageIETFvalueen-USdifferently depending on the track type.In the attached sample, both Audio and Text tracks contain the correct Matroska IETF language tag.
mkvmerge -Jreports:{ "id": 1, "language": "eng", "language_ietf": "en-US", "title": "English (US) | Opus 5.1 @ 392 kbps" }However, MediaInfo reports:
Audio track:
{ "ID": "2", "Title": "English (US) | Opus 5.1 @ 392 kbps", "Language": "en" }while subtitle tracks in the same file are reported as:
{ "ID": "11", "Title": "English (US)", "Language": "en-US" }and:
{ "ID": "12", "Title": "English (US) (SDH)", "Language": "en-US" }Expected behaviour
I would expect the same
LanguageIETFvalue to be reported consistently regardless of track type.Since the Matroska file contains:
for the audio track, I would expect MediaInfo to report:
for Audio tracks as well.
Actual behaviour
en-USis reported asenen-USis reported asen-USAdditional observations
In the same file, another audio track is reported correctly:
{ "ID": "3", "Title": "Portuguese (European) | Opus 5.1 @ 389 kbps", "Language": "pt-PT" }Therefore the behaviour does not seem to affect all IETF language tags equally.
Environment
MediaInfo:
mkvmerge:
mkvmerge output
{ "id": 1, "language": "eng", "language_ietf": "en-US", "title": "English (US) | Opus 5.1 @ 392 kbps" } { "id": 2, "language": "por", "language_ietf": "pt-PT", "title": "Portuguese (European) | Opus 5.1 @ 389 kbps" }MediaInfo Audio output
{ "ID": "2", "Title": "English (US) | Opus 5.1 @ 392 kbps", "Language": "en" } { "ID": "3", "Title": "Portuguese (European) | Opus 5.1 @ 389 kbps", "Language": "pt-PT" }MediaInfo Text output
{ "ID": "11", "Title": "English (US)", "Language": "en-US" } { "ID": "12", "Title": "English (US) (SDH)", "Language": "en-US" }