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HEVC with alpha [closed]
3 mai 2024, par foxhableI trying create HEVC with alpha video from png images through ffmpeg.


When i try, it outputs a video that works, has a transparent background and opens in QuickTime, but does not open in Safari. Then i try creating in prores 4444 codec and convert from macOS Context Menu -> Encode Selected Video Files with HEVC 1080p and Preserve Transparency. It has work - video with transparent background, open in QuickTime and in Safari.


So i tried understand what a difference in meta data and only what i find its working video has
HVEC
encoder, but not working hasLavc61.5.103 hevc_videotoolbox
. Can i somehow programmatically or from utilities like ffmpeg create video with HEVC With alpha, which working like from macOS context menu ? macOS context menu doesnt fit because i cant compress or create many videos

Detail info


I have example of working video. Info from ffprobe


ffprobe movie-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\movie-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 0
 compatible_brands: qt
 creation_time : 2021-01-02T10:33:38.000000Z
 Duration: 00:00:09.02, start: 0.000000, bitrate: 4053 kb/s
 Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], 4046 kb/s, 60 fps, 60 tbr, 600 tbn (default)
 Metadata:
 creation_time : 2021-01-02T10:33:38.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
 encoder : HEVC



Info about video which i create in prores by ffmpeg command, then convert through macOS context menu


command :


ffmpeg -i a%d.png -r 30 -c:v prores_ks -profile:v 4 -allow_sw 1 -alpha_quality 1 -vtag hvc1 prores.mov



info after converting


ffprobe .\native-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\native-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 0
 compatible_brands: qt
 creation_time : 2024-05-03T07:04:26.000000Z
 Duration: 00:00:12.77, start: 0.000000, bitrate: 8796 kb/s
 Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 1920x1920, 8792 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
 Metadata:
 creation_time : 2024-05-03T07:04:27.000000Z
 handler_name : Core Media Video
 vendor_id : [0][0][0][0]
 encoder : HEVC



Info about video which i`m create direct in hevc by ffmpeg command


ffmpeg -i a%d.png -r 30 -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 1 -vtag hvc1 ffmpeg-hevc.mov



Info :


ffprobe .\ffmpeg-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\ffmpeg-hevc.mov':
 Metadata:
 major_brand : qt
 minor_version : 512
 compatible_brands: qt
 encoder : Lavf61.3.103
 Duration: 00:00:12.77, start: 0.000000, bitrate: 3437 kb/s
 Stream #0:0[0x1]: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bottom coded first (swapped)), 1920x1920, 3435 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
 Metadata:
 handler_name : VideoHandler
 vendor_id : FFMP
 encoder : Lavc61.5.103 hevc_videotoolbox



also i tried :


- 

- props
-allow_sw 0
- get error -alpha-quality 0.75
,-pix_fmt bgra
- safari not open, QT yes, transparent bg- without
-vtag hvc1
- QuickTime cannot open - Tried convert from
webm
tohevc_videotoolbox
- safari not open, QT yes, transparent bg - tried convert
webm
into pngs and inhevc_videotoolbox
- safari not open, QT yes, transparent bg












Tried answers :




mac info :


- 

- macOS Monterey 12.7.2
- Mac mini (Late 2012)
- Core i5 3210M
- Graphics Intel HD 4000










- props
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