Hello, I have several media files where the video plays a little fast for a
few seconds, then pauses while the audio catches up. They’re mencoder divx
files in AVI. I found that the problem was the wdtv not properly handling
that duplicate frames omitted during encoding. (they play fine in mplayer)
I found I could reproduce or solve the problem by omitting or specifying
mencoder option harddup. This is a bug through version 1.03 on gen 1.
Here is the mediainfo for one with the problem. I compared it to another I
recently encoded and besides the program/library versions being different,
I noticed that the video is slightly shorter than the audio here, while
strangely the other has audio much much longer, like double. But like I said,
mplayer plays the files perfectly.
thanks
General
Complete name : wdtvvideojerky.divx
Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 1.08 GiB
Duration : 1h 48mn
Overall bit rate : 1 430 Kbps
Writing application : MEncoder 1.0pre7try2-Fedora-GS-4.0.1
Writing library : MPlayer
Video
ID : 0
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : FMP4
Duration : 1h 41mn
Bit rate : 1 277 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 1.500
Frame rate : 29.970 fps
Standard : NTSC
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.123
Stream size : 930 MiB (84%)
Writing library : FFmpeg0.4.9-pre1b4752
Audio
ID : 1
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Format_Settings_Mode : Joint stereo
Codec ID : 55
Codec ID/Hint : MP3
Duration : 1h 48mn
Bit rate mode : Variable
Bit rate : 212 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Stream size : 165 MiB (15%)
Alignment : Aligned on interleaves
Interleave, duration : 24 ms (0.72 video frame)
Interleave, preload duration : 647 ms
