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IDProjectCategoryView StatusDate SubmittedLast Update
0002966KdenliveRenderingpublic2013-02-02 14:192013-02-05 22:15
Reporterttguy 
Assigned To 
PrioritynormalSeverityminorReproducibilityalways
StatusnewResolutionopen 
Platform32 bit intel and alikeOSUbuntuOS Version12.04
Product Version0.9.4 
Target VersionFixed in Version 
Summary0002966: mpeg2 render produces file that report 104857 kb/s as video bit rate no matter the renders bitrate setting
DescriptionIf I render using the mpeg-2 settings and use different bit rate settings the resulting file always reports a bit rate of 10,4857 kbs when analyzed by ffprobe and when being imported into my DVD authoring software.
Interestingly ffprobe reports two different video bit rates. One is 104857 kb/s no matter what and the other is more like the requested bit rate.

eg file rendered with 1000 as the video bit rate setting
 ffprobe home_movies_vol24d_PAL1000.mpg
avprobe version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2007-2012 the Libav developers
  built on Jan 24 2013 18:03:14 with gcc 4.6.3
[mpeg @ 0x99eb240] max_analyze_duration reached
Input #0, mpeg, from 'home_movies_vol24d_PAL1000.mpg':
  Duration: 00:01:23.12, start: 1.000000, bitrate: 1268 kb/s
    Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 256 kb/s

rendered at 8000

$ ffprobe home_movies_vol24d_PAL8000.mpg
avprobe version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2007-2012 the Libav developers
  built on Jan 24 2013 18:03:14 with gcc 4.6.3
Input #0, mpeg, from 'home_movies_vol24d_PAL8000.mpg':
  Duration: 00:01:23.12, start: 1.000000, bitrate: 6877 kb/s
    Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 256 kb/s


file rendered with 18000 bit rate
$ ffprobe home_movies_vol24d_PAL18000.mpg
avprobe version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2007-2012 the Libav developers
  built on Jan 24 2013 18:03:14 with gcc 4.6.3
Input #0, mpeg, from 'home_movies_vol24d_PAL18000.mpg':
  Duration: 00:01:23.12, start: 1.000000, bitrate: 7051 kb/s
    Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 64:45 DAR 16:9], 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 256 kb/s

I am guessing the files have really been encoded at different rates. File sizes are
 1000 13mb
 8000 71.5mb
18000 73.3mb
And the 1000kbs one is more blocky than the others
Additional Informationmlt 0.8.8-0ubuntu0~sunab~precise1
kdenlive 0.9.4-ubuntu0~sunab~precise1
frei0r 1.3.0+git20130119.c3fdd674-0ubuntu0~sunab~precise1
TagsNo tags attached.
Build/Install Method3rd party package
Attached Files

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-  Notes
(0009189)
ttguy (updater)
2013-02-05 22:15

Ok. So this is the same as 0.9.2. I noticed from my notes that back on 0.9.2 I was using the DVD render group to make my .mpg files for DVD authoring. This mantis I was using the file rendering section and it creates files that have the behaviour described. But if I use DVD render group I get video that works in the DVD wizard and work in my DVD authoring tmpgenc software.

So this is another case of file rendering > mpeg2 not producing DVD compatible files. Which I think I now remember was happening with previous versions too.

I guess it still might be a defect. But the workaround is use DVD rendering group render profiles

- Issue History
Date Modified Username Field Change
2013-02-02 14:19 ttguy New Issue
2013-02-05 22:15 ttguy Note Added: 0009189


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