Thanks Dave
On Sat, Dec 10, 2022, 11:19 AM Frank Steinmetzger <war...@gmx.de> wrote: > Am Sat, Dec 10, 2022 at 09:20:17AM +0000 schrieb Wols Lists: > > > > > Depending on the PVR make/model I've seen 1080p resolution > recordings with > > > > .m2ts and .ts file extensions, while the codecs inside them are the > same. > -------------------------------------^^^^^^^^^^^^^^^^^^^^^^^ > > > > > I wasn’t aware that ts could contain h264. But then again—I never > really > ---------------------------------^^^^^^^ > > > bothered with live TV recordings in recent years. > > > I think this is confusing CONTAINER and CODEC. > > Where do we confuse those two? We specifically talked of codecs and > “contain”. > > > .ts is a container format, h264 is a codec. I don't understand it myself, > > either but think of ts as your directory structure and h264 as your file > > structure. > > Now you are confusing me. You say you don’t understand it, but then explain > it. TS is like AVI and MKV: a file structure for the payload data. And > payload data can be all kinds of stuff, from ASS plaintext subtitles, over > opus audio to mpeg2 or h264 video. > > > Incidentally, sticking this stuff in a .tar is probably okay - that's > just > > another container, but sticking it in a .tar.gz is not, the gz is your > codec > > and will make the file BIGGER in all probability. > > Tar does not compress, it simply puts all inputs in a 1:1 stream. It does > add some metadata (filename and so on). Packers reduce data volume by > increasing information-per-byte. So if the total information stays the same > (for lossless coding), the number of bytes decreases. Encoded video data > ideally has even entropy. It is indistinguishable from random noise. That’s > why compressing it again does not yield anything, or even adds some volume > again. > > -- > Grüße | Greetings | Salut | Qapla’ > Please do not share anything from, with or about me on any social network. > > “Mankind must put an end to war or war will put an end to mankind.” > – John F. Kennedy >
