Opened 5 years ago
Closed 5 years ago
#8427 closed defect (duplicate)
DNxHD codec Alpha Channel support (Decode and Encode)
| Reported by: | NNois | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | unspecified | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Hi,
In Broadcast there's 2 format in use Prores (Apple) and DNxHD (Avid).
FFmpeg already support Alpha channel in Prores.mov files.
How far are we to DNxHD support ?
In my Understanding DNxHD never compress the Alpha Channel, is it a Stopper for the Encoder (or the decoder) ?
Here is some test files, one is Prores with an alpha, the other is a DNxHD one
Attachments (2)
Change History (5)
by , 5 years ago
| Attachment: | dnxhd_with_alpha_straight.mov added |
|---|
by , 5 years ago
| Attachment: | prores_with_alpha_straight.mov added |
|---|
Correctly encoded ProRes file with an alpha channel correctly decoded by ffmpeg
comment:1 by , 5 years ago
To encode a dnxhd file (without alpha channel support)
ffmpeg.exe -y -i file.png -c:v dnxhd -profile:v dnxhr_sq -b 120M -pix_fmt yuv422p test.mov
comment:2 by , 5 years ago
| Keywords: | dnxhd alpha added |
|---|
comment:3 by , 5 years ago
| Keywords: | dnxhd alpha removed |
|---|---|
| Resolution: | → duplicate |
| Status: | new → closed |
See ticket #3707
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Correctly encoded DNxHD file with an alpha channel not decoded by ffmpeg