[FFmpeg-user] Giving a title to an audio stream

[Peter van den Houten]

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