В сообщении от Tuesday 17 November 2020 00:49:44 Terje J. Hanssen via Cin написал(а):
> While HDV and FHD video can rendered for Blu-ray media, the widespread
> DVD can only playback SD video content.
>
> HDV camcorders can during tape playback 1440x1080 anamorphic HDV
> content, downconvert it to Widescreen Anamorphic 16:9 video.
> Is it possible to get a Preset for DV(D) wide 16:9 video?
I tried to cook up something - but I'm not sure if frame rate for PAL 16:9 progressive should be 25 or 50 ...
https://cloud.mail.ru/public/3N3y/2ZHx1JXEC
{ N_("PAL 576i (16:9) - DV(D)"), 2, 2, 48000, 1, 1, 25,
720,576, 16,9, ILACE_MODE_BOTTOM_FIRST, BC_YUVA8888 },
{ N_("PAL 576p (16:9) - DV(D)"), 2, 2, 48000, 1, 1, 25,
720,576, 16,9, ILACE_MODE_NOTINTERLACED, BC_YUVA8888 },
for now I settled on 25 ...
I tried to re-encode
http://samples.mplayerhq.hu/MPEG2/dothack2.mpg
with PAL 576i - 16:9 preset and it come out as
mplayer /dev/shm/test02.mpeg
MPlayer SVN-r38202-10.0.1 (C) 2000-2020 MPlayer Team
parse error at line 423
do_connect: could not connect to socket
connect: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing /dev/shm/test02.mpeg.
libavformat version 58.64.100 (internal)
libavformat file format detected.
[mpeg @ 0x574b7520]stream 1 : no PTS found at end of file, duration not set
[lavf] stream 0: video (mpeg2video), -vid 0
[lavf] stream 1: audio (mp2), -aid 0
VIDEO: [MPG2] 720x576 0bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s)
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 58.112.101 (internal)
Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2)
==========================================================================
Load subtitles in /dev/shm/
==========================================================================
Forced audio codec: mad
Opening audio decoder: [libmad] libmad mpeg audio decoder
AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
Selected audio codec: [mad] afm: libmad (libMAD MPEG layer 1-2-3)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
The selected video_out device is incompatible with this codec.
Try appending the scale filter to your filter list,
e.g. -vf spp,scale instead of -vf spp.
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [vdpau] 720x576 => 1024x576 Planar YV12
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [vdpau] 720x576 => 1024x576 Planar YV12
mediainfo /dev/shm/test02.mpeg
General
Complete name : /dev/shm/test02.mpeg
Format : MPEG-PS
File size : 7.65 MiB
Duration : 17 s 16 ms
Overall bit rate mode : Variable
Overall bit rate : 3 771 kb/s
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : N=12
Duration : 17 s 0 ms
Bit rate mode : Variable
Bit rate : 3 312 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.319
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 6.71 MiB (88%)
Matrix coefficients : BT.601
Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 17 s 16 ms
Bit rate mode : Constant
Bit rate : 384 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Delay relative to video : -10 ms
Stream size : 798 KiB (10%)
hm .... it says progressive : /
There already 16:9 encodig presets in Create DVD wizard (? window where you can select few options inluding telecine, etc. try alt-d in main window)
>
>
> References
> ------------------
> MPEG-2 DVD-Video (Application)
> https://en.wikipedia.org/wiki/MPEG-2#DVD-Video
>
> 16:9 is the only widescreen aspect ratio natively supported by the DVD
> format. Anamorphic DVD transfers store the information as 5:4 (PAL) or
> 3:2 (NTSC) square pixels, which is set to expand to either 16:9 or 4:3,
> which the television or video player handles. For example, a PAL DVD
> with a full frame image may contain a video resolution of 720×576 (5:4
> ratio), but a video player software will stretch this to 1024×576 square
> pixels with a 16:9 flag in order to recreate the correct aspect ratio.
>
> https://en.wikipedia.org/wiki/16:9
>
> -------
>
> DVD Video - Widescreen Anamorphic 16:9 16x9
>
> A DVD labeled as "Widescreen Anamorphic" contains video that has the
> same frame size in pixels as traditional fullscreen video, but uses
> wider pixels. The shape of the pixels is called pixel aspect ratio and
> is encoded in the video stream for a DVD player to correctly identify
> the proportions of the video. If an anamorphic DVD video is played on
> standard 4:3 television without adjustment, the image will look
> horizontally squeezed.
>
> Although currently there is no labeling standard, DVDs with content
> originally produced in an aspect ratio wider than 1.33:1 are typically
> labeled "Anamorphic Widescreen," "Enhanced for 16:9 televisions,"
> "Enhanced for widescreen televisions," or similar. If not so labeled,
> the DVD is intended for a 4:3 display ("fullscreen"), and will be
> letterboxed or panned and scanned.
>
> https://en.wikipedia.org/wiki/Anamorphic_widescreen#DVD_Video
>
>
> Terje J. H
>
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