[FFmpeg-user] id3 tags not really removed?

[Ron Sparks]

On 05/29/2017 06:03 PM, Rodolfo Medina wrote:
> Rodolfo Medina <rodolfo.medina at gmail.com> writes:
> 
>> Rodolfo Medina <rodolfo.medina at gmail.com> writes:
>>
>>> Gyan <gyandoshi at gmail.com> writes:
>>>
>>>> Unless specified otherwise, ffmpeg will transcode streams. You have to add
>>>>
>>>> -c copy
>>>>
>>>>   to force stream copy (if the output format supports it). So,
>>>>
>>>> $ ffmpeg -i input.mp3 -c copy -metadata artist="Caterina Pontrandolfo
>>>> Quartett" -metadata album="concerto di Fonte Avellana" -metadata
>>>> genre="popular" -metadata composer="tradizione lucana" output.mp3
>>>
>>>
>>> Great.  Many thanks.
>>
>> It works fine...  But now I want to modify, to change some of those id3 tags.
>> Apparently, it is done with simply giving the above command once again, with
>> values changed at my pleasure: when afterwards I run `ffmpeg -i' on the file,
>> everything is fine and the values have changed as desired.  But when I read
>> the file using the mp3 reader which is in my car, the old tags are still
>> there...!  They have not changed at all!  How comes, and how to solve it?
>>
>> Thanks for any help,
>>
>> Rodolfo
> 
> 
> ... I also tried to remove all the tags with:
> 
>   $ ffmpeg -i input.mp3 -map 0:a -map_metadata -1 -c copy out.mp3
> 
> and then put them again, but the problem remains...
> 
> Rodolfo

I suspect the problem might be that ffmpeg works with the id3v2 tags, 
while your mp3 reader works with the id3v1 tags.
Ron Sparks