Den 14.01.2024 18:41, skrev Andrew Randrianasulu:
вс, 14 янв. 2024 г., 19:51 Terje J. Hanssen <[email protected]>:
Den 14.01.2024 17:43, skrev Terje J. Hanssen:
Den 13.01.2024 18:48, skrev Andrew Randrianasulu:
сб, 13 янв. 2024 г., 07:47 Andrew Randrianasulu
<[email protected]>:
сб, 13 янв. 2024 г., 03:26 Terje J. Hanssen via Cin
<[email protected]>:
Den 11.01.2024 23:43, skrev Terje J. Hanssen:
.......
4 a) Cin-GG
Loaded a PAL 1080i/50 HDV clip
Set Format Preset: PAL 576i (16:9) - DV(D)
File Render File Format: FFmepg - avi (NB! because
plain Raw DV still causes DAR 4:3)
Audio: Preset: avi_pcm_s16.avi
Video: Compression: dv_pal.avi
For me it looks like the Set Format Preset: PAL 576i
(16:9) - DV(D and/or the File Format: FFmpeg make up the
correct DAR 16:9 here, right?
Because by Selecting the Format: *Raw DV *cause
rendering to *DAR 4:3* as shown below !
This makes me wonder if it is only the FFmepg File
formats that currently is fixed by patches?
May also other non-FFmpeg formats be affected by
anamorphic aspect ratios ?
This is possible! I basically never used non-ffmpeg video
encoders! I think we have 3 of them - raw dv, mpeg video and
theora video.
I'll check each of them.
OOPS!
As already mentioned, CinGG's FFmpeg-avi was saved/displayed 16:9
and the Raw DV was saved/displayed 4:3.
BUT, in addition I discovered now that in both cases the images
have been cropped around, that is cut off at both sides, top and
bottom.
I wonder how much was cropped?
May be I misread you but you loaded HDV 1440*1080 clip and then
rendered it into ffmpeg DV at 576i WITHOUT any scaling on top?
Yes, I loaded the anamorphic 16:9 HDV 1440x1080 clip and then rendered
it using Set Format Preset PAL 576i (16:9)-DV(D) - without any scaling
on top.
According to my understanding this should down-convert the full source
image to DVD 16:9 anamorphic format, which at playback should display
upscaled 16:9 screen.
That is, just as in my first post
4 b) FFmpeg transcode HDV to DV-wide
ffmpeg -hide_banner -i hdv07_05.m2t -vf
scale=720:576,setsar=64/45,setdar=16/9 -c:v dvvideo -c:a pcm_s16le
dv07_05_wide.dv
Gnome File properties and VLC Tools Codec info just say1440x1080
resolution for the HDV source and 720x576 for the CinGG rendered avi and
dv output.
I don't know if it possible to find out exactly, but
Visually I espect and will estimate that the "middle part" 720x576 px
symmetrical around the center of the source image is kept. That is
cropped away
* horizontally at each side: (1440-720)/2 = 360 px
* vertically top and bottom: (1080-576)/2 = 252 px
That is, the 16:9 avi is displayed with correct geometry, while
the 4:3 Raw DV is displayed stretched vertically.
The latter get correct geometry if forced aspect 16:9 during VLC
playback..
Actually, only my ffmpeg manual encoded DV-wide has got correct
DAR 16:9 and also correct geometry.
And kept the full image (un-cropped).
A visual tip is that this is easiest to discover and compare side
by side using large file thumbnails with (Gnome) Filemanager.
in cinelerra/fileogg.C I found this comment:
=====
if( asset->aspect_ratio > 0 ) {
// Cinelerra uses frame aspect ratio, theora
uses pixel aspect ratio
float pixel_aspect = asset->aspect_ratio / asset->width *
asset->height;
aratio_num = pixel_aspect * 1000000;
aratio_den = 1000000; }
else {
aratio_num = 1000000;
aratio_den = 1000000; }
=====
strangely enough filedv seems to contain code to set is16x9
encoder flag ... not sure why it fails ....
mpeg video also should honor aspect ratio, but not tested yet.
mediainfo dv07_05_wide_cingg.dv | grep Display
Display aspect ratio : 4:3
ffprobe -hide_banner dv07_05_wide_cingg.dv
Input #0, dv, from 'dv07_05_wide_cingg.dv':
Duration: 00:06:58.08, start: 0.000000, bitrate: 28800
kb/s
Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR
16:15 DAR 4:3], 25000 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16,
1536 kb/s
--
Cin mailing list
[email protected]
https://lists.cinelerra-gg.org/mailman/listinfo/cin
--
Cin mailing list
[email protected]
https://lists.cinelerra-gg.org/mailman/listinfo/cin
