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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001830||Kdenlive||Rendering||public||2010-09-26 23:58||2011-08-07 22:02|
|Platform||64 bit||OS||Mandriva Linux||OS Version||2009|
|Target Version||Fixed in Version||0.7.8|
|Summary||0001830: artifact storm on certain DNxHD converted videos|
|Description||We are using ffmpeg to convert from H264 (as produced by a Canon EOS 7D camera) to DNxHD. It works fine most of the times in the sense that:|
- kaffeine, mplayer, vlc play the converted videos nicely
- kdenlive imports, edits and renders to h264, mpeg4, mpeg2, etc without any problems.
But on *certain* videos kdenlive imports puts a storm of artifacts both on the preview and on the rendered result in any format.
This doesn't seem to be a problem with ffmpeg as even the files kdenlive has problems with play nicelty with kaffein, mplayer and vlc.
What do these videos have in common? They're all filmed with low light conditions.
|Steps To Reproduce||- shoot in low light conditions|
- convert to DNxHD
- check that it plays fine on regular media players
- import into kdenlive
- observe artifacts on the preview
- observe artifacts on the rendered file
All the relevant information including the project, raw files and rendered file is here:
|Additional Information||Conversion to DNxHD is done using:|
ffmpeg -y -s $RES -r pal -b $BITRATE -threads $THREADS -vcodec dnxhd -qmax $QMAX -acodec copy output/$file -i $file;
|Tags||No tags attached.|
|Attached Files||artifacts.png [^] (806,178 bytes) 2011-03-02 02:47|
|This was a bug in MLT, which is fixed in current MLT's version. I tested your project and it renders fine with Kdenlive 0.7.8 / MLT 0.5.10|
edited on: 2011-03-02 02:46
I upgraded kdenlive and the problem still happens.
Here is the version info:
Note that appart from the extreme example that was referred in this bug report (clip shot in total darkness with a bright smartphone screen appearing) the problem happened previsouly on kdenlive 0.7.7.1 just as the current atachment shows. It happens in *some* dark areas of *some* clips.
|Just to let you know that the problem persists (as reported above) and is easily reproducible with different videos.|
|2010-09-26 23:58||ghomem||New Issue|
|2010-09-29 20:38||j-b-m||Note Added: 0005936|
|2010-09-29 20:38||j-b-m||Relationship added||duplicate of 0001509|
|2010-09-29 20:38||j-b-m||Status||new => resolved|
|2010-09-29 20:38||j-b-m||Fixed in Version||=> 0.7.8|
|2010-09-29 20:38||j-b-m||Resolution||open => duplicate|
|2010-09-29 20:38||j-b-m||Assigned To||=> j-b-m|
|2011-03-02 02:43||ghomem||Note Added: 0006510|
|2011-03-02 02:43||ghomem||Status||resolved => feedback|
|2011-03-02 02:43||ghomem||Resolution||duplicate => reopened|
|2011-03-02 02:46||ghomem||Note Edited: 0006510||View Revisions|
|2011-03-02 02:47||ghomem||File Added: artifacts.png|
|2011-08-07 22:02||ghomem||Note Added: 0007149|
|2011-08-07 22:02||ghomem||Status||feedback => assigned|
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