вс, 14 янв. 2024 г., 19:51 Terje J. Hanssen <terjejhanssen@gmail.com>:


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 <randrianasulu@gmail.com>:


сб, 13 янв. 2024 г., 03:26 Terje J. Hanssen via Cin <cin@lists.cinelerra-gg.org>:


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?



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




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