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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
| 0002761 | Kdenlive | Rendering | public | 2012-09-27 09:49 | 2013-01-28 19:51 | ||||
| Reporter | eddrog | ||||||||
| Assigned To | j-b-m | ||||||||
| Priority | normal | Severity | major | Reproducibility | always | ||||
| Status | closed | Resolution | fixed | ||||||
| Platform | 64 bit | OS | Ubuntu | OS Version | 12.04 | ||||
| Product Version | Recent git | ||||||||
| Target Version | 0.9.4 | Fixed in Version | 0.9.4 | ||||||
| Summary | 0002761: Alpha channel broken in rendered file | ||||||||
| Description | A title clip or a png (with alpha channel) is shown properly in project monitor with composite or dissolve. In the rendered file the transparent part becomes black. | ||||||||
| Steps To Reproduce | 1) Load a title and a sample clip into timeline. 2) Overlap and add a composite transition. 3) Render this part to webm or mp4. 4) Play rendered file with vlc. | ||||||||
| Additional Information | In my jack branch I have an older version of kdenlive/mlt => works correct. Didn't have the time yesterday to figure out which commit (mlt/kdenlive) breaks the alpha in rendered output. | ||||||||
| Tags | No tags attached. | ||||||||
| Build/Install Method | Build Script | ||||||||
| Attached Files |  composite.png [^] (9,102 bytes) 2012-09-27 21:46
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(0008410) j-b-m (administrator) 2012-09-27 21:46 |
I cannot reproduce, but there seem to be some strange issues with MLT rendering on 64bit. Can you reproduce the problem with melt? Try this in a terminal: melt color:red out=100 -track pango:+hello out=100 -transition composite -consumer avformat:test.mp4 Will create a test.mp4 clip that should look like my attached picture. |
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(0008413) eddrog (developer) 2012-09-28 21:21 |
The melt example works but its some how generic. The commit 386e02aca066220dfa5a7323825371686066e2fd (fix yadif deinterlacer on streams with progressive & interlace) in mlt breaks it (Kdenlive latest git). Interlaced clips work but you have very bad luck with progressive one. Steps to reporduce: 1) Load progressive or forced hdv to progressive clip into timeline 2) add title with composite transition 3) render and enjoy the alpha channel as black Project settings: HDV or HD25p |
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(0008431) eddrog (developer) 2012-10-02 10:05 |
Checked it. Seems to be fixed in recent MLT git (deinterlacer regression fix). Some other tickets are related to this regression. This minor optimization caused some trouble. I hope its done now :-)) |
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Issue History |
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| Date Modified | Username | Field | Change |
| 2012-09-27 09:49 | eddrog | New Issue | |
| 2012-09-27 09:49 | eddrog | Status | new => assigned |
| 2012-09-27 09:49 | eddrog | Assigned To | => j-b-m |
| 2012-09-27 21:46 | j-b-m | Note Added: 0008410 | |
| 2012-09-27 21:46 | j-b-m | Status | assigned => feedback |
| 2012-09-27 21:46 | j-b-m | File Added: composite.png | |
| 2012-09-28 21:21 | eddrog | Note Added: 0008413 | |
| 2012-09-28 21:21 | eddrog | Status | feedback => assigned |
| 2012-10-02 10:05 | eddrog | Note Added: 0008431 | |
| 2012-10-02 10:16 | eddrog | Status | assigned => resolved |
| 2012-10-02 10:16 | eddrog | Fixed in Version | => Recent git |
| 2012-10-02 10:16 | eddrog | Resolution | open => fixed |
| 2013-01-28 19:49 | j-b-m | Fixed in Version | Recent git => 0.9.4 |
| 2013-01-28 19:51 | j-b-m | Status | resolved => closed |
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Issue History |
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