[FFmpeg-user] ffmpeg convert a blue-ray file is so slowly
christophgerstbauer at gmail.com
Sat Jun 14 21:09:46 CEST 2014
I think 1280x692 is typical for:
16:9 HD was cropped because the CONTENT on the 16:9 image was at 1.85:1
(wide screen film format).
Therefore the 16:9 (1.78:1) encoded picture HAD black stripes at top and
bottom, these stripes where cut off so that the final encoded video in
the MKV has no black stripes anymore.
so the steps which were done were following:
1920x1080 with black stripes was the original bluray source (16:9 = 1.78:1)-
-> blackstripes where cropped -> 1920x1038 (1.85:1)
-> scaled down to 1280x692 (1.85:1), (67.78%)
see example 16:9 with black stripes here:
Am 14.06.14 08:01, schrieb Henk D. Schoneveld:
> On 14 Jun 2014, at 00:45, Moritz Barsnick <barsnick at gmx.net> wrote:
>> On Fri, Jun 13, 2014 at 20:53:27 +0200, Henk D. Schoneveld wrote:
>>> On 13 Jun 2014, at 05:05, lym <xdh4025 at 163.com> wrote:
>>>> "width": 1280,
>>>> "height": 692,
>>> This doesn't suggest it's a BluRay, Horizontal width always is 1920 afaik.
>> Wikipedia disagrees with you:
> That's about video-formats that 'can' be stored on BluRay Disks, I've never seen a commercial title other than 1920 as width.
> Further ffprobe says it's a mkv, so the source originally was a BluRay, then ripped and downscaled to 1280x692 in mkv.
>> Though a (vertical) height of 692 is indeed _not_ mentioned there.
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