Studdering Video

[Joe "Rotund" Tennies]

I am ripping my Christmas DVDs using 0.9.3+repack-0ubuntu3 in Karmic. The problem is that the video is coming out very studdering. The simplest offender to see is "How The Grinch Stole Christmas" NTSC to PS3 Normal. If you watch right after the opening credits, there's a pan to the right.

My only guess is that it could be something in the deinterlacer or frame rate converter. I noticed the files are now 30 fps instead of ~29.97, which may not normally be too visible, but the "original source" is 12 fps progressive (unlikely, but possible).

My real guess though is gstreamer or the Arista pipeline for gstreamer lacks a 3:2 pulldown detection and filter.

[Johan (johan-andersson-78)]

I have a major frame rate issue. A short movie I'm trying to convert ends up with 6fps though it should be 25fps.

Same root cause perhaps?

I can supply the file if anyone want to digg into this (it's a "Mirrors Edge" trailer in QuickTime format).

************

Input file:
-----------
General:
Mirrors_Edge_2.mov
197,0 MB (206616533 byte)
QuickTime-video (video/quicktime)

Video:
2 minutes 6 seconds
1280 x 720
H.264 / AVC
25 frames per second

Audio:
Raw 16-bit PCM audio
Stereo
48000 Hz
-------------

Output: Computer High

Arista: 0.9.3

Ubuntu: 9.10 Karmic

CPU: AMD64 Neo MV40

/Johan Andersson, Sweden

[Johan (johan-andersson-78)]

More frame rate troubles:

All videos taken with my personal Panasonic photo camera ends up with faulty frame rate after transcoding. The 24fps videos ends up at 12fps.

They are QuickTime MJPG (motion jpeg) movies at 1280x720.

Output: Computer High

[Johan (johan-andersson-78)]

Things are getting interesting...

The reason I'm transcoding files are because I have a "Popcorn Hour A-110" media player (a "PCH"), connected to my TV. The PCH can't decode motion jpeg since it is based on a Sigma Blue-Ray chip which is mainly aimed at decoding "H.264 / AVC" video. Here the Arista "Computer - High" setting should be perfect. (thank you! :-)

The interesting part is that my computer (Ubuntu 9.10) says the transcoded files are at 6fps. It should have been 24fps if the transcoding went as I hoped. The video play correctly though.
But on my PCH the file-information says that the file is a 24fps file (!!!) and the sound sync is very wrong.

Perhaps this is some sort of clue to what the root cause is...
Just ask if I can help out. Testing or whatever.
(I'm not good at coding at all but I know a little and could take a look at it if I just knew where to look in the code.)

[Joe "Rotund" Tennies (joe-tennies)]

Johan, your comments appear to be an entirely different problem. Please open a new bug report. I actually watched the DVD for the Grinch and noticed that the source material also seemed to stutter, so I am going to mark this bug as closed. Funny what you see when you are examining the outputs thoroughly to see if it looks good ;)

[Johan (johan-andersson-78)]

Ok, I open upp a new bug.