Does anyone know what video format the D5100 records to? HDV? AVCHD? Curious.
What video format on the '5100
(11 posts) (4 voices)-
Posted 2 years ago #
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H.264/MPEG-4 AVC
Posted 2 years ago # -
In a Quicktime "wrapper."
Posted 2 years ago # -
Thanks, so then that's AVCHD, right?
Posted 2 years ago # -
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No. H.264/AVC is not the same as AVCHD.
H.264/AVC is a video codec which -- as studio460 pointed out -- is often stored in a QuickTime (.MOV) wrapper.
AVCHD is a more comprehensive standard which uses a subset H.264/AVC, but also defines other items like file & directory structures, audio codecs (e.g., Dolby AC-3), maximum bit rates, etc. AVCHD also has video presentation features like navigation menus, slide shows, background music track, and subtitles.
AVCHD was designed in part to easily author HD content using standard DVD discs which are playable on Blu-ray players.
Posted 2 years ago # -
Hmmm, so the file format that Nikon uses an actual Quicktime .mov? That would kinda suck, as encoding (or re-encoding when necessary) Quicktime files on a Windows platform using QT Pro, I always get a ratty file with a flat gamma. Plus if you want to dump to Blu-Ray you'll get an encoding hit. Time-consuming and quality degrading.
Posted 2 years ago # -
My bad. All AVCHD video is H.264 video format, but all AVCHD is more than H.264.
@Vidrazor, I wouldn't feel too bad about the format. It's incredibly thrifty, but you likely wouldn't be happy with something that takes a lot of bandwidth. IOW, you're going to have to be good with some trade off somewhere. H.264 ain't bad.
My best,
Mike
Posted 2 years ago # -
@vidrazor:
As you may know, a video encoded with a any codec (such as H.264) can be stored in different file formats (such as AVI, MOV, or MTS). Regardless of the format the video is stored in, the encoding used is still the same. Merely changing the file format does not require re-encoding the video; The video itself hasn't changed.
It's like moving your clothes from a wooden box to a metal box. All you need to do is take it out from one container and put it into another container, unchanged. Likewise, you can take a H.264 video from QuickTime MOV file and stuff it into an AVI container without re-encoding.
Now for specific Blu-ray requirements.
Blu-ray requires video to be encoded in one of three codecs: MPEG2, VC-1, or H.264/AVC. So the D5100 video is at least in one of the right codecs (H.264).
Also, Blu-ray requires the file to be in the M2TS (MPEG2 Transport Stream) format. However, as discussed above, merely changing the file format does not require re-encoding.
Lastly, Blu-ray requires the video to be of very specific resolutions, bit-rates, "profiles" and "levels" (e.g., 1920x1080 at 23.976p H.264/AVC Main Profile @ 4.1).
I'd guess at least one of the D5100's video modes conform to the Blu-ray requirements, but I don't know for sure. If not, then re-encoding will be necessary.
In practice, most "professional" video/films from DSLRs are heavily edited, color graded, etc., before producing the final output. So they are encoded at least twice: 1) the source video files are encoded to an "editing friendly" intermediate codec such as Apple ProRes or Cineform. 2) After all the edits, the video is encoded again to the final form, such as MPEG-2 or VC-1.
Posted 2 years ago # -
As long as I can jump out of QT without having to re-render or save in QT than I'm fine with that. Like I said, QT Pro renders lousy video on a Windows machine. It always makes a file with a flat gamma.
Posted 2 years ago # -
Ade Barkah said:
In practice, most "professional" video/films from DSLRs are heavily edited, color graded, etc., before producing the final output. So they are encoded at least twice: 1) the source video files are encoded to an "editing friendly" intermediate codec such as Apple ProRes or Cineform. 2) After all the edits, the video is encoded again to the final form, such as MPEG-2 or VC-1.Great! Someone who knows their CODECs, post workflows, and finishing formats! Welcome to NR! Post more often!
Posted 2 years ago #
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