[FFmpeg-devel] Input metadata not updated inside mux context

[Christo Grozev]

>You can use hls_ts_options to set the mpegts metadata.
I am sorry, but won't this simply copy the metadata to the resulting mgets segments - but if the stream metadata is not updated following the initial copy, wouldn't that be the same (initial) metadata, and not the updated one as it comes in on the input stream?

Thanks!

Christo


-----Original Message-----
From: ffmpeg-devel [mailto:ffmpeg-devel-bounces at ffmpeg.org] On Behalf Of Steven Liu
Sent: Monday, January 2, 2017 12:04 PM
To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org>
Subject: Re: [FFmpeg-devel] Input metadata not updated inside mux context

2017-01-02 17:10 GMT+08:00 Christo Grozev <cgrozev at gmail.com>:

>
> Happy New Year to all!
>
> I am trying to create a patch for metadata-aware hls splitting.
> Unfortunately, i cannot seem to get updated metadata from the 
> AVFormatContext object inside the muxer scope. For example, within 
> hlsenc.c I have this::
>
>     static int hls_start(AVFormatContext *s)
>     {
>     HLSContext *c = s->priv_data;
>     AVFormatContext *oc = c->avf;
>     AVFormatContext *vtt_oc = c->vtt_avf;
>     AVDictionary *options = NULL;
>     char *filename, iv_string[KEYSIZE*2 + 1];
>     int err = 0;
>     int ret = 0;
>     AVDictionaryEntry *tag = NULL;
>
>     av_log(s, AV_LOG_DEBUG, "Lets check if there's metadata now.. ");
>
>     tag = av_dict_get(oc->metadata, "StreamTitle", tag, 
> AV_DICT_IGNORE_SUFFIX);
>     printf("%s\n",tag->value);
>
>
>
> However, what is logged is always the original StreamTitle that was 
> valid when the initial connection to the input url was made, and is 
> not updating it further. Granted, this is the output stream context, 
> but it does contain the initial metadata, apparently. What would be 
> the way to update it, or to access the input context's metadata? Or is 
> the only solution to re-poll the input stream in a separate process?
>

You can use hls_ts_options to set the mpegts metadata.

>
>
>
> Thanks in advance
>
> Christo
>
>
>
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