[FFmpeg-trac] #3328(undetermined:open): video "judder" issue noted after DVR-MS to MP4 conversion

FFmpeg trac at avcodec.org
Wed Jan 22 11:49:02 CET 2014

#3328: video "judder" issue noted after DVR-MS to MP4 conversion
             Reporter:  beteljuice   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  regression   |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1

Comment (by cehoyos):

 Replying to [comment:10 beteljuice]:
 > Using ffmpeg w/ git 633b90c, I found that the resulting output (as an
 .avi file) played back properly with no judder. However, I did note the
 following when playing back the files using Windows Media Player 11:
 > - the audio on the .avi was quieter than the .dvr-ms (had to increase
 the volume to compensate)

 This seems completely unrelated.

 > - Using MediaInfo to evaluate the properties of each file, I found that
 both files showed a resolution of 720x480 and an aspect ratio of 16:9.
 However, the video stream for the .avi reported 59.940 fps, while the
 .dvr-ms reported 23.976fps.

 In which situation is this a problem?

 > - When playing the files in fullscreen, the height of the black bars
 above and below the .avi was less than the height of the black bars for
 the .dvr-ms. As an example: the spinning globe at the beginning of the
 .dvr-ms file is perfectly round, while the globe in the .avi file is oval
 (left and right sides of the globe pressed inwards).

 Is this reproducible with current git head?

Ticket URL: <https://trac.ffmpeg.org/ticket/3328#comment:15>
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