On 10/06/2025 14.01, Paul B Mahol wrote:
On Tue, Jun 10, 2025 at 5:50 PM Mark Filipak <
markfilipak.imdb-at-gmail....@ffmpeg.org> wrote:
ffmpeg-all.html
"18.31 text2movsub
Convert text subtitles to MOV subtitles (as used by the mov_text codec)
with metadata headers."
ffmpeg-codecs.html
("mov_text" not found.)
Is there a mov_text codec? What is mov_text?
# ffmpeg -hide_banner -codecs|grep mov_text
DES... mov_text MOV text
Thank you, Paul.
Ah, yes. I knew about "ffmpeg -codecs" but that was a long time ago. Thank you
for reminding me.
If mov_text is indeed a codec -- 'ffmpeg -codecs' says it's a codec -- one would think it would be
listed, somehow, in ffmpeg-codecs.html, eh?
Methinks it's not a codec at all -- that subtitles are not coded. Methinks it's really
textual-subtitles-as-metadata, in which case ffmpeg-all.html, section 18.31 is misleading, eh?
If mov_text is really textual-subtitles-as-metadata, then it must be in private packets, eh? And is
it correct to say that mp4 players -- perhaps only _some_ or _most_ mp4 players -- support textual
subtitles as metadata in private packets within an MPEG TS?
So, in ffmpeg-all.html section 18.31, wouldn't it be more accurate to say that
text2movsub is
"A metadata writer that muxes textual subtitles into the transport stream"
instead of
"Convert text subtitles to MOV subtitles (as used by the mov_text codec) with
metadata headers"?
These are not small details, eh?
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