On Wed, Mar 18, 2020 at 10:42:12AM +0000, Kieran Kunhya wrote: > On Wed, 18 Mar 2020 at 02:38, Limin Wang <lance.lmw...@gmail.com> wrote: > > > On Wed, Mar 18, 2020 at 12:13:33AM +0000, Derek Buitenhuis wrote: > > > On 17/03/2020 23:11, Limin Wang wrote: > > > > The user data unregistered allows arbitrary data to be carried in the > > bitstream, > > > > for example, ROI info, time info etc. For the real support patch, > > please refer to > > > > the pending patch series 7, 8 in below link: > > > > > > https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200107050355.17503-1-lance.lmw...@gmail.com/ > > > > > > I understand what the SEI does. I was inquiring as to what the usecase > > you had > > > in mind for it specifically. I don't like the idea of adding APIs that > > are only > > > theorically useful - that is, what data is intended to be shoved in > > there? > > > > In order to identify the source of time used in the live event, the > > encoder system can > > insert a time mode-source code along with each embedded precision time > > stamp. > > Each time mode-source code will be inserted into the H.264/H.265 bitstream > > as an SEI > > message of type User Data (Unregistered). The format is self-defined json > > string > > > > And the timecode field is not enough? I just give one use case for the unregistered user data. Actual We have more other private info in the json string. timecode SEI is helpful, but it's not enough..
> You do know that the time at source will not match the rate at which frames > arrive, there will be a drift? Yes, we inserted the live time in the second level device, it's not require to be frame accurate. > > Kieran > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". -- Thanks, Limin Wang _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
