Hello all, I sent a similar email to this list a several months ago, but got no reply. Can anyone at least confirm this issue please? I have this problem with mencoder: Whenever I try to encode with yadif=1 (50 fps output in case of PAL), I get A/V desync, the sound is about 150ms late. That is, when I play the result with "mplayer -delay 0.15 test.avi", everything's ok. The (simplified) command is: $ mencoder -vf yadif=1,harddup -ovc lavc -lavcopts \ vcodec=mpeg4:keyint=132:threads=2:vbitrate=1000 -fps 50 -ofps 50 \ -oac copy -dvd-device . dvd://1 -aid 0 -o test.avi -endpos 0:2:0 If I encode it with yadif=0 (25 fps output, same fps as the source), there is no delay: $ mencoder -vf yadif=0,harddup -ovc lavc -lavcopts \ vcodec=mpeg4:keyint=132:threads=2:vbitrate=1000 \ -oac copy -dvd-device . dvd://1 -aid 0 -o test.avi -endpos 0:2:0 So, is there anything that causes this audio delay? I get it with any DVD I try to encode. Also, it always seems to be around 150ms. I thought about correcting it manually on the container level or during encoding (-audio-delay option), but there's visible junk in the beginning of the video if I do that. Plus, I need to know the exact value to use. Things I've tried: * Encoding audio track too (to cbr mp3). The delay is still there. * Encoding video separately (-of rawvideo), then muxing audio (both original and encoded to mp3) to mkv container using mkvmerge. The delay is still there. * Using -mc 0 with -oac copy. I actually get the reverse situation here - about 100ms _video_ delay. * Using -mc 0 with audio encode. This is the only one that seems to be in sync. Of course, this has the disadvantage of re-encoding the already lossy audio. Plus, -mc 0 disables all kinds of A/V sync, and since my sources are definitely not 100% good, it will cause the sync to go bad for most of them. This issue really makes yadif=1 (or, generally, high quality double-fps encoding) unusable in mencoder, so I'm already thinking about trying the alternatives (transcode, maybe?). Thanks a lot in advance! Alexander P.S. Here's the mencoder output: $ mencoder -vf yadif=1,harddup -ovc lavc -lavcopts vcodec=mpeg4:keyint=132:threads=2:vbitrate=1000 -fps 50 -ofps 50 -oac copy -dvd-device . dvd://1 -aid 0 -o test.avi -endpos 0:2:0 MEncoder SVN-r29352-4.3 (C) 2000-2009 MPlayer Team libdvdread: Using libdvdcss version 1.2.10 for DVD access libdvdread: Couldn't find device name. There are 1 titles on this DVD. There are 1 angles in this DVD title. audio stream: 0 format: mpeg1 (stereo) language: unknown aid: 0. audio stream: 1 format: ac3 (stereo) language: unknown aid: 129. number of audio channels on disk: 2. number of subtitles on disk: 0 success: format: 2 data: 0x0 - 0x1c74e000 MPEG-PS file format detected. VIDEO: MPEG2 720x576 (aspect 3) 25.000 fps 8197.6 kbps (1024.7 kbyte/s) [V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.000 ftime:=0.0400 Input fps will be interpreted as 50.000 instead. ========================================================================== Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000->192000) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) ========================================================================== Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 Opening video filter: [harddup] Opening video filter: [yadif=1] ========================================================================== Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough VDec: vo config request - 720 x 576 (preferred colorspace: Mpeg PES) Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] The selected video_out device is incompatible with this codec. Try appending the scale filter to your filter list, e.g. -vf spp,scale instead of -vf spp. VDecoder init failed :( Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Unsupported PixelFormat -1 Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2) ========================================================================== audiocodec: framecopy (format=50 chans=2 rate=48000 bits=16 B/s=32000 sample-1) VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.78:1 - prescaling to correct movie aspect. videocodec: libavcodec (720x576 fourcc=34504d46 [FMP4]) [mpeg2video @ 0x15a7d30]ac-tex damaged at 1 1 [mpeg2video @ 0x15a7d30]Warning MVs not available [mpeg2video @ 0x15a7d30]concealing 1575 DC, 1575 AC, 1575 MV errors Pos: 0.0s 1f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0] 1 duplicate frame(s)! Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. New_Face failed. Maybe the font path is wrong.n 0mb A-V:0.002 [0:0] Please supply the text font file (~/.mplayer/subfont.ttf). subtitle font: load_sub_face failed. Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. 1 duplicate frame(s)! Pos: 0.8s 22f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.042 [0:256] Skipping frame! Pos: 1.2s 32f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.042 [1625:256] Skipping frame! Pos: 1.6s 42f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.041 [1473:256] Skipping frame! Pos: 2.1s 57f ( 0%) 43.61fps Trem: 0min 0mb A-V:0.041 [1371:256] Skipping frame! Pos: 3.2s 84f ( 0%) 44.23fps Trem: 0min 0mb A-V:0.041 [1330:256] Skipping frame! Pos: 34.5s 869f ( 0%) 41.43fps Trem: 47min 739mb A-V:0.041 [1049:256] Skipping frame! Pos: 120.0s 3008f ( 2%) 40.79fps Trem: 47min 713mb A-V:-0.011 [1009:256] Flushing video frames. Writing index... Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Video stream: 1009.791 kbit/s (126223 B/s) size: 15151919 bytes 120.040 secs 3008 frames Audio stream: 256.000 kbit/s (32000 B/s) size: 3840000 bytes 120.000 secs _______________________________________________ MPlayer-users mailing list MPlayer-users@xxxxxxxxxxxx https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
