mp4 out of Sync

[brassplyer]

I converted a 16:9 DV file of about 35 minutes to mp4 using WinFF and find the audio is out of sync. Any suggestion on how to prevent this?

If it helps, this is the command line I used. The only thing I changed from the default is the video bitrate upped it to 1700 min 2200 max.

-r 29.97 -vcodec h264 -s 704x384 -aspect 16:9 -flags +loop -cmp +chroma -deblockalpha 0 -deblockbeta 0 -b 1700k -maxrate 2200k -bufsize 4M -bt 256k -refs 1 -bf 3 -coder 1 -me umh -me_range 16 -subq 7 -partitions +parti4x4+parti8x8+partp8x8+partb8x8 -g 250 -keyint_min 25 -level 30 -qmin 10 -qmax 51 -qcomp 0.6 -trellis 2 -sc_threshold 40 -i_qfactor 0.71 -acodec aac -ab 112k -ar 48000 -ac 2

Thanks

Follow-up - I just converted the same file to Xvid and got the same results.

[MegaTonTerror]

The only thing I can think of is load the video and audio in MeGUI in it's Muxer and use the delay feature.

[brassplyer]

The only thing I can think of is load the video and audio in MeGUI in it's Muxer and use the delay feature.

I tried a 2-pass conversion to x264w using Virtualdub. Sync is okay there. However I notice the bitrate has to be much lower for the same file size.

[Xpenguin17]

That is because H.264 in AVI delays by however many B-frames if you got B-pyramid enabled.

[guns1inger]

File size = bitrate X running time. The same bitrate should get you the same file sizes, regardless of tool or codec used.

[brassplyer]

File size = bitrate X running time. The same bitrate should get you the same file sizes, regardless of tool or codec used.

I forgot I had the original full 48khz .wav file attached to the video - uhh-Hyuk hyuk hyuk (Goofy chuckles) That's what was keeping the file size so high.

.smack forehead

When I attached a 256kbps mp3 instead it brought the file size in line.