[FFmpeg-devel] [PATCH] avformat/hlsenc: program_date_time and append_list flags conflict

[Steven Liu]

> 在 2020年1月19日，03:31，Bodecs Bela <bodecsb at vivanet.hu> 写道：
> 
> sorry for missing patch file, here it is.
> 
> Bela
> 
> 
> 2020.01.18. 18:56 keltezéssel, Bodecs Bela írta:
>> Dear All,
>> 
>> 
>> When program_date_time flag is present, in m3u8 playlist file each
>> segment has a corresponding EXT-X-PROGRAM-DATE-TIME value. The initial
>> program-date-time value is the actual current time at init and
>> each new segment increments this value by its duration. When append_list
>> flags is also present, existing playlist parsing by hls_append_segment
>> treats existing segments as new segments regarding the program-date-time
>> calculation. But it should not do that, because this way all  the real
>> new segments' EXT-X-PROGRAM-DATE-TIME values will be shifted erroneously
>> by the sum duration of existing segments. Instead it should have
>> decremented the initial program-date-time value by its duration. This
>> would ensure that the first new segment's program-date-time value had
>> the current time as it is expected.
>> This patch corrects this behaviour and prevent existing segments to
>> increment the value of initial_prog_date_time variable but decrements
>> it.
>> 
>> 
>> please review this patch!
>> 
>> thank you in advance,
LGTM
>> 
>> Bela
>> 
>> 
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Thanks
Steven