[Libav-user] No metadata in adts container using libavformat API

[Igor Serganov]

Hello Carl,

Just wondering if code provided is enough to reproduce the issue / find
what am I doing wrong?

Thank you,

Kind regards,

Igor Serganov

On Mon, 28 Nov 2022 at 21:51, Igor Serganov <iserganoff at gmail.com> wrote:

> Hello Carl,
>
> Also worth mentioning, that during runtime ‘ av_dump_format’ displays
> correctly all changes made to the format container metadata.
>
> Thank you,
>
> Kind regards,
>
> Igor Serganov
>
> On Mon, 28 Nov 2022 at 18:30, Igor Serganov <iserganoff at gmail.com> wrote:
>
>> Hello Carl,
>>
>>
>> Thank you for your reply. I think now I have realised that I have 2
>> issues in my scenario:
>>
>> 1. The code attached (metadata.cpp) writes perfectly some static header
>> during mp3 => mp3 transcoding, however if I use ADTS muxer with AAC output
>> stream inside, metadata is not written.
>> 2. Since one of the tags contains start time of the segment, I need to
>> update its value multiple times (as many as I have 10s segments during
>> transcoding) after calling avformat_alloc_output_context2 and
>> avformat_write_header .  That doesn’t work neither for mp3 nor for adts
>> muxer.
>>
>>
>>
>> On 27 Nov 2022, at 17:00, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:
>>
>> Am Sa., 26. Nov. 2022 um 19:08 Uhr schrieb Igor Serganov <
>> iserganoff at gmail.com>:
>>
>>
>> Hello team!
>>
>> I would appreciate your help on the following issue.
>>
>>
>> I believe you should provide code that can be compiled stand-alone.
>>
>> It seems very unlikely that you found a bug, much more likely that
>> something is missing in your code (assuming it works with ffmpeg,
>> the application).
>>
>> Carl Eugen
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>>
>>
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