On Sun, 30 Aug 2020 at 18:11, Gyan Doshi <ffm...@gyani.pro> wrote: > > > On 30-08-2020 06:52 pm, Dennis Mungai wrote: > > Hello there, > > > > With mpegts output, should global headers be used or not, set via -fflags > > +global_header? > > No. > > > And if there are exceptions to that, based on the codec type wrapped in > > mpegts, when should global headers be used for mpegts? > > Global header is for formats that store codec parameters out of band > i.e. in container metadata. Enabling the flag tells the encoder to store > parameters in AVStream->extradata from where it is used by muxers of > such formats. Additionally, the flag also suppresses periodic > announcement of these parameters within the stream (in-band). > > MPEG-TS has no global header since it is meant for use as a 'continuous' > transport stream. to which clients may start listening at an arbitrary > point. So periodic parameter set transmission is required. > > When generating an output for use by a single muxer, the muxer has a > flag which will be conveyed to the encoder automatically, so the user > doesn't have to set anything. However in case of the tee muxer, which > sends data to multiple muxers, some of which require global headers, the > flag has to be manually set and periodic parameter sets reinserted using > dump_extra for muxers such as mpegts. > > Regards, > Gyan > > Many thanks for clearing that up, Gyan. Most appreciated. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user
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