HDV residing on a tape is not in a disk-file format although the data is compressed using a particular codec defined by a section of the MPEG spec. "Capture" software reads the data from tape and puts it in a file format, which might be avi or mov, etc. H.264 is a codec family; there are several different implementations. As you know, codec is the algorithm used to compress/decompress a video, and these videos can reside in several different file formats such as mp4, avi, mov, etc. They say H.264 is part of the MPEG spec in section MPEG-4 Part 10 and is derived from and based on an MPEG-2 spec but I guess we don't really need to know that. It is a slightly newer compression but more importantly, it is designed to compress higher bit-rate video files into lower bit-rates and smaller files sizes (and also is known as AVC). Gets confusing, I know - just remember the file extension describes the format of the file itself and is often of different letters than the name of the codec used to compress and place a video into that file. Occasionally the file extension and the codec can be the same (mpg) but often the file extension does not hint at the codec used, i.e., avi and mov both can contain an mpg-codec video. To play a video one must have the decompressor that can reverse the codec used to compress the video. Typically the software codec dll file on your system contains both in the same dll file. While there technically are scores of file formats and multiple hundreds of codecs, thankfully becoming familiar with only a few of them will suffice. Lee From: [email protected] [mailto:[email protected]] On Behalf Of Gerald Sent: Tuesday, August 02, 2011 5:41 PM To: [email protected] Subject: Re: [AP] OnLocation Capture Formats Thanks for the info. I'm using Sony FX 1000's.
If this is an H264 format then I'm thinking it is pretty good and I shouldn't expect a noticable reduction of quality compared to capturing HDV. Why did Adobe use this when it uses HDV to capture from tape? --- In [email protected] <mailto:Adobe-Premiere%40yahoogroups.com> , BEDFORD NEIL <barrymung@...> wrote: > > Hi Gerald, > > The .M2T or .MTS or even .MT2S extensions are all part of the AVCHD 'family' > (if you can call them that) of HD Blu-Ray video, using H.264 compression. > > http://en.wikipedia.org/wiki/MPEG_transport_stream > > http://en.wikipedia.org/wiki/AVCHD > > Your HDV is actually the lossy MPEG2/H.262 4.2.0 compression system, more > here: > > http://en.wikipedia.org/wiki/HDV > > That should help explain things and make it more understandable. > > Just tell us what camera it is and someone should be able to help more :-) > > Cheers, > > Neil. > > On 2 August 2011 18:20, Gerald <mail@...> wrote: > > > ** > > > > > > Why does OnLocation use .m2t file format instead of HDV? Is there any > > problem with this? I can see that PP is happy with this file format, but > > isn't is a compressed mpeg based format? > > > > > > > > > [Non-text portions of this message have been removed] > [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Adobe-Premiere/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Adobe-Premiere/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
