Finally I figured out that three effects in combo are generating the
jitter in multi-threaded rendering:
Blue Screen
KeySpillMopup
Alpha Operations
Disabling them didn't produce any jitter as follows. Hope this helps.
----
//STARTING RENDERING: false , false , "/usr/bin/melt" ,
"atsc_1080p_30" , "avformat" , "-" ,
"/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_keyspillmopup_alphaoperations_only.sh.mlt"
,
"/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_alphaoperations_only.mp4"
, () , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
"progressive=1", "threads=4", "real_time=-4") , 0 , 613
Started render process: "/usr/bin/melt"
"/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_keyspillmopup_alphaoperations_only.sh.mlt
in=0 out=613 -profile atsc_1080p_30 -consumer
avformat:/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_alphaoperations_only.mp4
progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
threads=4 real_time=-4"
Rendering of
"/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_alphaoperations_only.mp4"
finished
On 11/20/14, Zenny <garbytr...@gmail.com> wrote:
> Hi again:
>
> I disabled Blue Screen only and rendered, still the jitter existed.
> Again I disabled keyspillmopup only. Both produced jitter.
>
> I tried once again by disabling Blue Screen and Keyspillmopup, still
> it produced jitter.
>
> So It cannot be ruled out that the culprit is Blue Screen.
>
> Seems like it is more than those two effects for sure. If you need
> videos, I can supply you.
>
> ---------------
>
> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
> "atsc_1080p_30" , "avformat" , "-" ,
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_only.sh.mlt"
> , "/home/zenny/kdenlive/multi_threads4_wo_blue_screen_only.mp4" , () ,
> ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
> Started render process: "/usr/bin/melt"
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_only.sh.mlt
> in=0 out=613 -profile atsc_1080p_30 -consumer
> avformat:/home/zenny/kdenlive/multi_threads4_wo_blue_screen_only.mp4
> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
> threads=4 real_time=-4"
> Rendering of "/home/zenny/kdenlive/multi_threads4_wo_blue_screen_only.mp4"
> finished
> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
> "atsc_1080p_30" , "avformat" , "-" ,
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_keyspillmopup_only.sh.mlt"
> , "/home/zenny/kdenlive/multi_threads4_wo_keyspillmopup_only.mp4" , ()
> , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
> Started render process: "/usr/bin/melt"
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_keyspillmopup_only.sh.mlt
> in=0 out=613 -profile atsc_1080p_30 -consumer
> avformat:/home/zenny/kdenlive/multi_threads4_wo_keyspillmopup_only.mp4
> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
> threads=4 real_time=-4"
> Rendering of
> "/home/zenny/kdenlive/multi_threads4_wo_keyspillmopup_only.mp4"
> finished
> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
> "atsc_1080p_30" , "avformat" , "-" ,
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_keyspillmopup_only.sh.mlt"
> ,
> "/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_only.mp4"
> , () , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
> Started render process: "/usr/bin/melt"
> "/home/zenny/kdenlive/scripts/multi_threads4_wo_blue_screen_keyspillmopup_only.sh.mlt
> in=0 out=613 -profile atsc_1080p_30 -consumer
> avformat:/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_only.mp4
> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
> threads=4 real_time=-4"
> Rendering of
> "/home/zenny/kdenlive/multi_threads4_wo_blue_screen_keyspillmopup_only.mp4"
> finished
>
> On 11/20/14, Zenny <garbytr...@gmail.com> wrote:
>> Okay, here is an update:
>>
>> The reason for jitter is the chroma key (blue screen) effect while
>> multi-threaded.
>>
>> As you advised, I rendered with a single thread and also by disabling
>> effects one by one. Like you stated, when Chroma Key effect (Blue
>> Screen) is disabled, the jitter went away.
>>
>> However, except the single-threaded with effects, all were ran with
>> the command line with the scripts generated by kdenlive.
>>
>> MLT is at 0.9.3+git20141107.3d96fa5c-0ubuntu0~sunab~trusty1
>> KDEnlive is at 0.9.10+git20141112.5e5e462a-0ubuntu0~sunab~trusty1
>> frei0r-plugins is at 1.4.0+git20141112.baa08d27-0ubuntu0~sunab~trusty1
>>
>> If you need, I can share video, however below is the output from the
>> command line fyi.
>>
>> ----
>>
>> //STARTING RENDERING: true , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/tmp/kde-zenny/kdenliveJE4550.mlt" ,
>> "/home/zenny/kdenlive/single_thread_with_all_effects.mp4" , () ,
>> ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-1") , 0 , 613
>> QDBusConnection: session D-Bus connection created before
>> QCoreApplication. Application may misbehave.
>> QDBusConnection: session D-Bus connection created before
>> QCoreApplication. Application may misbehave.
>> Started render process: "/usr/bin/melt"
>> "/tmp/kde-zenny/kdenliveJE4550.mlt in=0 out=613 -profile atsc_1080p_30
>> -consumer
>> avformat:/home/zenny/kdenlive/single_thread_with_all_effects.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-1"
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)
>> Rendering of "/home/zenny/kdenlive/single_thread_with_all_effects.mp4"
>> finished
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceAdded(QDBusObjectPath)
>> Object::connect: No such signal
>> org::freedesktop::UPower::DeviceRemoved(QDBusObjectPath)
>> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/home/zenny/kdenlive/scripts/multhreaded4_with_effects_001.sh.mlt" ,
>> "/home/zenny/kdenlive/multi_threads4_with_all_effects.mp4" , () ,
>> ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
>> Started render process: "/usr/bin/melt"
>> "/home/zenny/kdenlive/scripts/multhreaded4_with_effects_001.sh.mlt
>> in=0 out=613 -profile atsc_1080p_30 -consumer
>> avformat:/home/zenny/kdenlive/multi_threads4_with_all_effects.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-4"
>> Rendering of "/home/zenny/kdenlive/multi_threads4_with_all_effects.mp4"
>> finished
>> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/home/zenny/kdenlive/scripts/multhreaded4_wo_alpha_operations_test_001.sh.mlt"
>> , "/home/zenny/kdenlive/multi_threads4_wo_alpah_operations.mp4" , () ,
>> ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
>> Started render process: "/usr/bin/melt"
>> "/home/zenny/kdenlive/scripts/multhreaded4_wo_alpha_operations_test_001.sh.mlt
>> in=0 out=613 -profile atsc_1080p_30 -consumer
>> avformat:/home/zenny/kdenlive/multi_threads4_wo_alpah_operations.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-4"
>> Rendering of
>> "/home/zenny/kdenlive/multi_threads4_wo_alpah_operations.mp4"
>> finished
>> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/home/zenny/kdenlive/scripts/multhreaded_wo_alphao_keyspillmopup_test_001.sh.mlt"
>> , "/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup.mp4" ,
>> () , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-1") , 0 , 613
>> Started render process: "/usr/bin/melt"
>> "/home/zenny/kdenlive/scripts/multhreaded_wo_alphao_keyspillmopup_test_001.sh.mlt
>> in=0 out=613 -profile atsc_1080p_30 -consumer
>> avformat:/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-1"
>> Kdenlive-render: JOB ABORTED BY USER...
>> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/home/zenny/kdenlive/scripts/multhreaded_wo_alphao_keyspillmopup_test_001.sh.mlt"
>> , "/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup.mp4" ,
>> () , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
>> Started render process: "/usr/bin/melt"
>> "/home/zenny/kdenlive/scripts/multhreaded_wo_alphao_keyspillmopup_test_001.sh.mlt
>> in=0 out=613 -profile atsc_1080p_30 -consumer
>> avformat:/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-4"
>> Rendering of
>> "/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup.mp4"
>> finished
>> //STARTING RENDERING: false , false , "/usr/bin/melt" ,
>> "atsc_1080p_30" , "avformat" , "-" ,
>> "/home/zenny/kdenlive/scripts/multi_threads4_wo_alpha_keyspillmopup_blue_screen.sh.mlt"
>> ,
>> "/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup_blue_screen.mp4"
>> , () , ("properties=x264-medium", "g=120", "crf=20", "ab=160k",
>> "progressive=1", "threads=4", "real_time=-4") , 0 , 613
>> Started render process: "/usr/bin/melt"
>> "/home/zenny/kdenlive/scripts/multi_threads4_wo_alpha_keyspillmopup_blue_screen.sh.mlt
>> in=0 out=613 -profile atsc_1080p_30 -consumer
>> avformat:/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup_blue_screen.mp4
>> progress=1 properties=x264-medium g=120 crf=20 ab=160k progressive=1
>> threads=4 real_time=-4"
>> Rendering of
>> "/home/zenny/kdenlive/multi_threads4_wo_alpha_keyspillmopup_blue_screen.mp4"
>> finished
>>
>> On 11/19/14, Dan Dennedy <d...@dennedy.org> wrote:
>>> On Wed, Nov 19, 2014 at 4:27 AM, Zenny <garbytr...@gmail.com> wrote:
>>>
>>>> On 11/18/14, Dan Dennedy <d...@dennedy.org> wrote:
>>>> > On Tue, Nov 18, 2014 at 11:13 AM, Zenny <garbytr...@gmail.com> wrote:
>>>> >
>>>> >> Hi again:
>>>> >>
>>>> >> Trying to help some friends to create composite video. But when I
>>>> >> try
>>>> >> to render using a single processor, the rendering is fine, but when
>>>> >> tried with multiple processors, it produces jitters as seen on the
>>>> >> attachments (20s of videos respectively for comparison).
>>>> >>
>>>> >> Some filter (Effect in Kdenlive) is having a problem with
>>>> >> multi-threading,
>>>>
>>>>
>>>> I came across a forum post which stated otherwise:
>>>>
>>>> https://forum.kde.org/viewtopic.php?f=265&t=115590&sid=5254b0bb04f00274298cb7dfb3755286&start=15#p324465
>>>>
>>>>
>>> On the contrary, that forum confirms my allegation! There _is_ an effect
>>> that is causing the problem. It is not difficult to isolate which one it
>>> is, but only _after_ you have reproduced the problem. Alas, I have not
>>> reproduced the problem because no one has told me how. I see that user
>>> jkolodziej's video also is doing some chroma key effect. So, you guys
>>> can
>>> either help out, or wait until I stumble upon it myself. Once the
>>> offending
>>> effect is isolated, it is quick and easy to make a fix that prevents
>>> multi-threaded access to that effect or its core routine.
>>>
>>> --
>>> +-DRD-+
>>>
>>
>
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