[FFmpeg-devel] [PATCH] Allow using only the mfra info for seeking using the fragment index

Derek Buitenhuis derek.buitenhuis at gmail.com
Thu Oct 8 13:26:21 EEST 2020

On 07/10/2020 16:44, Derek Buitenhuis wrote:
>> The mfra has enough information to enable seeking, and reading it is
>> behind an AVOption flag, so we shouldn't require that sidx information
>> also be present in order to seek using the fragment index.
>> Signed-off-by: Derek Buitenhuis <derek.buitenhuis at gmail.com>
>> ---
>> This is especially important want I/O is networked, since otherwise it will
>> read essentially the entire file by seeking to every sidx in the file, which
>> for a live-style FMP4 can be a *lot*.
>> Dale Curtis is CC'd, as this is probably highly relevant to him.
>> Note: If a global sidx is present, that information will override the mfra, but
>> if sidx are before each moof, those will no longer be parsed in mov_read_header
>> if you set use_mfra_for, which can result in a wrong duration since mfra isn't
>> used for setting duration while sidx is.
>> ---
>>  libavformat/mov.c | 1 +
>>  1 file changed, 1 insertion(+)
> Ping.

Will push late today, or tomorrow, if nobody objects.

- Derek

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