From: "Tomas Härdin" <git@haerdin.se>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] avformat/mxfenc: SMPTE RDD 48:2018 Amd 1:2022 (FFV1 in MXF) support
Date: Wed, 18 Jan 2023 14:40:39 +0100
Message-ID: <a8992de53a0b8d6144a443b26242f760ff4e4526.camel@haerdin.se> (raw)
In-Reply-To: <b7f281fb-2cd9-a85c-1868-0c824b150634@mediaarea.net>
Creating a new subthread because I just noticed something
> + //Stored height
> mxf_write_local_tag(s, 4, 0x3202);
> avio_wb32(pb, stored_height>>sc->interlaced);
>
Won't this be incorrect for files whose dimensions are multiples of 16
but not multiples of 32? Isn't each field stored separately with
dimensions a multiple of 16? So while for 1080p we'll have
StoredHeight = 1088
SampledHeight = 1080
and 1080i:
StoredHeight = 544
SampledHeight = 540
Where 544 is a multiple of 16, for say 720p we have
StoredHeight = 720
SampledHeight = 720
but for a hypothetical 720i we'd get
StoredHeight = 360
SampledHeight = 360
whereas the correct values should be
StoredHeight = 368
SampledHeight = 360
?
/Tomas
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next prev parent reply other threads:[~2023-01-18 13:40 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-14 15:45 Jerome Martinez
2023-01-16 14:00 ` Tomas Härdin
2023-01-16 14:17 ` Jerome Martinez
2023-01-18 10:12 ` Tomas Härdin
2023-01-18 14:25 ` Jerome Martinez
2023-01-18 13:40 ` Tomas Härdin [this message]
2023-01-18 14:15 ` Jerome Martinez
2023-01-20 15:17 ` Tomas Härdin
2023-01-29 16:36 ` Dave Rice
2023-01-31 14:53 ` Tomas Härdin
2023-03-14 9:52 ` Jerome Martinez
2023-03-15 14:00 ` Tomas Härdin
2023-03-24 13:59 ` Dave Rice
2023-03-25 18:29 ` Tomas Härdin
2023-04-01 14:37 ` Michael Niedermayer
2023-04-01 15:20 ` Jerome Martinez
2023-04-01 15:43 ` Michael Niedermayer
2023-04-01 17:11 ` Jerome Martinez
2023-04-02 20:07 ` Michael Niedermayer
2023-04-02 22:07 ` Jerome Martinez
2023-04-04 14:43 ` Michael Niedermayer
2023-04-04 14:57 ` Jerome Martinez
2023-04-04 17:32 ` Michael Niedermayer
2023-04-04 21:37 ` Jerome Martinez
2023-04-05 12:31 ` Michael Niedermayer
2023-04-05 12:42 ` Michael Niedermayer
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