On Thu, Mar 25, 2010 at 11:31 AM, Rolf Ernst <rolf.ernst at silverlightning.org > wrote: > On Thu, Mar 25, 2010 at 8:13 AM, TJ <one.timothy.jones at gmail.com> wrote: > > > Hiya, > > > > When playing HD files encoded with h.264, video progressively goes out of > > sync > > with (lags behind) the audio. I tried it on 2 different computers. Here > are > > the > > commands I used: > > > > mplayer -cache 8192 - < capture-00.flv > > mplayer -vo vdpau -vc ffh264vdpau -cache 8192 - < capture-00.flv > > > > Without VDPAU acceleration, CPU usage does not go above 50% (it's Core 2 > > Duo > > 1.83GHz computer). With VDPAU CPU usage is below 10%. But still in both > > cases > > video slowly lags more and more behind the audio. > > > > If I add -framedrop option, it fixes the problem, but I see jerks once in > a > > while. Without the option the video plays smoothly. > > > > I am using MPlayer SVN-r29796-4.3.4. > > > > The original files are encoded using ffmpeg with the following command: > > > > ffmpeg \ > > -f rawvideo -s 1280x720 -pix_fmt uyvy422 -r 59.94 -i /dev/sdivideorx0 \ > > -f s16le -ar 48000 -ac 2 -i /dev/sdiaudiorx0 \ > > -vcodec libx264 -vpre custom -vb 4000000 -threads 0 \ > > -acodec libfaac -ab 256k \ > > -f flv - > capture-00.flv > > > > I know the original files are good, as I can play them on the mac with no > > glitches. I tried using different container (-f mpegts) but that didn't > > help. > > > > I was thinking maybe this has something to do with the monitor refresh > rate > > being 60Hz while the video is 59.94Hz. > > > > Does anybody have any suggestions on what I can do to fix this? > > > > Thank you. > > > > -TJ > > > Just noticed you are doing faac encoding: > > Here are my settings for that: > > "C:\Bin\mencoder.exe" "E:\rip\Tudors - S03E03.TS.12.TS" -o > "D:\Enc_Out\Tudors - S03E03.TS.12.mkv" -ovc x264 -x264encopts > > threads=0:bframes=5:b-adapt=2:partitions=all:cabac:nopsnr:nossim:mixed_refs:frameref=6:weight_b:b_pyramid=normal:me=umh:merange=16:subme=6:analyse=all:8x8dct=1:trellis=1:psy-rd=1,1:no-fast-pskip=1:crf=23 > -oac faac -faacopts br=160:mpeg=4:object=1 -vf > crop=1264:704:8:10,scale=720:480 -fps 60000/1001 > > Rolf, Thank you brother. I am using ffmpeg to capture the files, but if nothing else works, I will try mencoder. I am capturing uncompressed live feed (HD-SDI with embedded audio). Then the file, while it is being recorded, gets piped over the network to another computer, where it is being played back a minute or 2 behind the live feed. My x264 options are slightly different from yours (they are hidden in ffmpeg -vpre custom preset), which I dialed in to allow the server to keep up with the live feed. -TJ
