Hello Carl,
Looks like I have found the solution:
av_dict_set(¶ms, "write_id3v2", "1", 0);
av_dict_set(¶ms, "write_apetag", "1", 0);
The above 2 lines did the job. While write_id3v2 option is something I expected
to help, I am not really sure why write_apetag is needed?
Also it seems to be convenient to have additional flag which will enable
automatic writing of audio start_time to ID3 tag like described in this page:
https://docs.unified-streaming.com/documentation/vod/id3.html#priv-com-apple-streaming-transportstreamtimestamp
<https://docs.unified-streaming.com/documentation/vod/id3.html#priv-com-apple-streaming-transportstreamtimestamp>.
Actually exactly the same is being done while muxing to mpegts format where
format has `start_time` field. As this is quite a requirement of RFC-8216.
Thank you,
Kind Regards,
Igor Serganov
> On 1 Dec 2022, at 07:51, Igor Serganov <[email protected]> wrote:
>
> 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 <[email protected]
> <mailto:[email protected]>> 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 <[email protected]
> <mailto:[email protected]>> 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 <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Am Sa., 26. Nov. 2022 um 19:08 Uhr schrieb Igor Serganov
>> <[email protected] <mailto:[email protected]>>:
>>>
>>> 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
>> _______________________________________________
>> Libav-user mailing list
>> [email protected] <mailto:[email protected]>
>> https://ffmpeg.org/mailman/listinfo/libav-user
>> <https://ffmpeg.org/mailman/listinfo/libav-user>
>>
>> To unsubscribe, visit link above, or email
>> [email protected] <mailto:[email protected]> with
>> subject "unsubscribe".
>
_______________________________________________
Libav-user mailing list
[email protected]
https://ffmpeg.org/mailman/listinfo/libav-user
To unsubscribe, visit link above, or email
[email protected] with subject "unsubscribe".
