On 08/08/2020 13:21, PPRJ01 wrote:
> Hello All,
>
> I don't understand how ffmpeg/ffprobe manage some metadata of audio streams.
>
> Let's take a simple example :
>
> ffmpeg -i INPUT.mp4 -c copy -metadata:s:a:0 "title=5.1" OUTPUT.mp4
>
> The result is :
> 1- ffprobe is not able to retrieve the audio title of the resulting file,
> whatever are the options used (I don't know if there are undocumented options)
> 2- VLC does retrieve the audio title correctly
> 3- exiftool does retrieve the audio title too
>
> I tried to do something similar with a subtitle stream and I had the same
> result.
>
> I am not a developper. Therefore I cannot read the source code. Maybe ffmpeg
> stores this metadata in a place where ffprobe is not able to retrieve it.
>
> Does somebody know if this is a normal behavior ?
>
> Rgds
>
> Pascal
>I have found in recent versions that FFmpeg is ignoring certain flags in
>metadata commands (especially subtitles). In any event, your quotes are in the
>wrong place; try:
-metadata:s:a:0 title="5.1" -metadata:s:a:0 language=eng -disposition:a:0
default
("default" means display, "none" means suppress)
--
PJ
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