March 2005 - MEncoder-users - lists.mplayerhq.hu

Can you slow down mencoder?
by Jonathan Lundberg 20 Aug '05

20 Aug '05

Hello all, My situation is that I need to encode the same content from a video grab card to two different bitrates at the same time. The files need to be ready for use at roughly the same time (ie, the end of the show!). Unlike Windows Media Encoder, or Helix Producer, it's not possible with mencoder to grab to two different output rates at the same time (or am I wrong???). What I have to do is grab from the tv capture card to filename.avi, and while it's still grabbing from the tv card, run mencoder against filename.avi to also produce an identical file at a lower bitrate. My problem is that the second mencoder runs faster than real time, catches up with the end of the file, and then exits while the primary encode is still running. Is it possible to slow down mencoder so that it also runs in realtime, so that if I start it running 10 seconds after the initial grab, it'll run second by second against the file being grabbed, instead of 'as fast as computerly possible'? Or is there some other way to feed the content of filename.avi into mencoder in real time for encoding? Cheers, Jonathan ****************************************************************************** The information in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Please note that emails to, from and within RTÉ may be subject to the Freedom of Information Act 1997 and may be liable to disclosure. ******************************************************************************

10 28

problems with target size and xvid
by Alexey 11 Apr '05

11 Apr '05

Hi everybody, I am using mplayer-1.0_pre5-r5 and xvid-1-0.2 on gentoo linux and I have a problem with the target size. I dont get the size I specify. I use mencoder as encoder and these are the settings I use. mencoder dvd://1 -dvd-device /path/to/dvd -nosound -xvidencopts :bitrate=-1790943:pass=1:vhq=4:me_quality=6:chroma_me:quant_type=mpeg:max_bframes=2:gmc -o /dev/null mencoder dvd://1 -dvd-device /path/to/dvd -nosound -ovc xvid -xvidencopts :bitrate=-1790943:pass=2:vhq=4:me_quality=6:chroma_me:quant_type=mpeg:max_bframes=2:gmc -o output.avi Although this should have produced a filesize of about 1.7GB I got 2.8GB. Could it be that the second pass needs the avi file of the first pass? I thought that "xvid-twopass.stats" contains all the data needed for second pass. I tested the target size option before with smaller values and got pretty exact sizes so it worked. But after encoding three times with such a big target size I didnt got anything even close to it. This is very annoying as this encoding took my PC about 30 hours and I will have to do it again. So did I do anything wrong or is this a bug in xvid? Regards Alexey

2 3

A/V synchronization problem using mencoder
by Xie Bo 30 Mar '05

30 Mar '05

Hi, I compiled the MPlayer-20050324 CVS in MinGW and run the following commond: -------- mplayer dvd:// -------- It is synchronized. But when I execute the following command: ---------- mencoder dvd:// -of mpeg -o output.mpg -oac copy -ovc copy -mpegopts format=dvd mplayer output.mpg ---------- It's not synchronized. The more time I play it, the more delay I got. Would you be so kind to give me some suggestions to fix the synchronization problem for "mencoder dvd:// -of mpeg -o output.mpg -oac copy -ovc copy -mpegopts format=dvd" command? Thank you! Best Regards, Xie Bo

7 19

mplayer cannot play AC3 anymore
by Stefan Frings 30 Mar '05

30 Mar '05

Hi, I just uploaded the first 4MB of one problematic movie. The filename is ac3_crash.mpg I'm familiar with C programming but I never used the debugger. I think I will learn it in near future. I followed your debug instructions step by step. This is what I got: Starting playback... Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1221443456 (LWP 22192)] 0xb7e7cdc7 in a52_free () from /usr/local/lib/libavcodec.so (gdb) bt #0 0xb7e7cdc7 in a52_free () from /usr/local/lib/libavcodec.so #1 0xb7e7bd2a in a52_block () from /usr/local/lib/libavcodec.so #2 0x080e2a07 in decode_audio (sh_audio=0x0, buf=0x83bea00 "", minlen=65536, maxlen=71680) at ad_liba52.c:309 #3 0x080e204d in decode_audio (sh_audio=0x83b0ae0, buf=0x83ddc98 "", minlen=71680, maxlen=65536) at dec_audio.c:398 #4 0x080769fb in main (argc=3, argv=0xbffffb14) at mplayer.c:2251 (gdb) disass $pc-32 $pc+32 Dump of assembler code from 0xb7e7cda7 to 0xb7e7cde7: 0xb7e7cda7 <a52_free+967>: mov %ax,0x1a8(%edi) 0xb7e7cdae <a52_free+974>: mov 0x10(%ebp),%edi 0xb7e7cdb1 <a52_free+977>: push %bx 0xb7e7cdb3 <a52_free+979>: fild (%esp) 0xb7e7cdb6 <a52_free+982>: add $0x2,%esp 0xb7e7cdb9 <a52_free+985>: movzbl (%esi,%edi,1),%ecx 0xb7e7cdbd <a52_free+989>: fmuls 0xffffff78(%ebp,%ecx,4) 0xb7e7cdc4 <a52_free+996>: mov 0xc(%ebp),%edx 0xb7e7cdc7 <a52_free+999>: fstps (%edx,%esi,4) 0xb7e7cdca <a52_free+1002>: inc %esi 0xb7e7cdcb <a52_free+1003>: cmp 0x20(%ebp),%esi 0xb7e7cdce <a52_free+1006>: jl 0xb7e7cd60 <a52_free+896> 0xb7e7cdd0 <a52_free+1008>: add $0xac,%esp 0xb7e7cdd6 <a52_free+1014>: pop %ebx 0xb7e7cdd7 <a52_free+1015>: pop %esi 0xb7e7cdd8 <a52_free+1016>: pop %edi 0xb7e7cdd9 <a52_free+1017>: pop %ebp 0xb7e7cdda <a52_free+1018>: ret 0xb7e7cddb <a52_free+1019>: mov 0xc(%ebp),%edi 0xb7e7cdde <a52_free+1022>: mov $0x0,%edx 0xb7e7cde3 <a52_free+1027>: mov %edx,(%edi,%esi,4) 0xb7e7cde6 <a52_free+1030>: jmp 0xb7e7cdca <a52_free+1002> End of assembler dump. (gdb) info all-registers eax 0xc 12 ecx 0xf 15 edx 0x0 0 ebx 0xbfffd630 -1073752528 esp 0xbfffd4f0 0xbfffd4f0 ebp 0xbfffd5a8 0xbfffd5a8 esi 0x0 0 edi 0x832cf43 137547587 eip 0xb7e7cdc7 0xb7e7cdc7 eflags 0x10216 66070 cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 st0 0 (raw 0x00000000000000000000) st1 0 (raw 0x00000000000000000000) st2 0 (raw 0x00000000000000000000) st3 1 (raw 0x3fff8000000000000000) st4 22.2738628387451171875 (raw 0x4003b230df0000000000) st5 0 (raw 0x00000000000000000000) st6 31.5 (raw 0x4003fc00000000000000) st7 5.72981662116944789886474609375e-11 (raw 0x3fdcfc00000000000000) fctrl 0x37f 895 fstat 0x7820 30752 ftag 0x7fff 32767 fiseg 0x0 0 fioff 0x0 0 foseg 0x0 0 fooff 0x0 0 fop 0x0 0 xmm0 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm1 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm2 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} ---Type <return> to continue, or q <return> to quit--- xmm3 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm4 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm5 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm6 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} xmm7 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 = 0x00000000000000000000000000000000} mxcsr 0x1f80 8064 mm0 {uint64 = 0xfc00000000000000, v2_int32 = {0x0, 0xfc000000}, v4_int16 = {0x0, 0x0, 0x0, 0xfc00}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xfc}} mm1 {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0, 0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}} mm2 {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0, 0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}} mm3 {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0, 0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}} mm4 {uint64 = 0x8000000000000000, v2_int32 = {0x0, 0x80000000}, v4_int16 = {0x0, 0x0, 0x0, 0x8000}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80}} mm5 {uint64 = 0xb230df0000000000, v2_int32 = {0x0, 0xb230df00}, v4_int16 = {0x0, 0x0, 0xdf00, 0xb230}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0xdf, 0x30, 0xb2}} mm6 {uint64 = 0x0, v2_int32 = {0x0, 0x0}, v4_int16 = {0x0, 0x0, 0x0, 0x0}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}} mm7 {uint64 = 0xfc00000000000000, v2_int32 = {0x0, 0xfc000000}, v4_int16 = {0x0, 0x0, 0x0, 0xfc00}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xfc}} (gdb) I cannot follow the next steps because I did not find a core file. Do I need to enable it somewhere? I saw that the program crashed in livavcodec.so. I installed ffmpeg-0.4.9-pre1 which included the following files. Do you have another version? -rw-rw-r-- 1 stefan familie 23476 2005-01-23 19:09 4xm.c -rw-rw-r-- 1 stefan familie 5631 2005-01-23 19:09 8bps.c -rw-rw-r-- 1 stefan familie 7865 2004-05-21 16:37 a52dec.c -rw-rw-r-- 1 stefan familie 5334 2004-05-21 16:37 ac3dec.c -rw-rw-r-- 1 stefan familie 43593 2004-12-29 18:50 ac3enc.c -rw-rw-r-- 1 stefan familie 34225 2005-02-21 20:27 adpcm.c -rw-rw-r-- 1 stefan familie 9717 2005-02-24 20:08 adx.c -rw-rw-r-- 1 stefan familie 28148 2005-03-10 06:34 alac.c -rw-rw-r-- 1 stefan familie 8734 2005-03-09 04:04 allcodecs.c -rw-rw-r-- 1 stefan familie 17314 2005-03-22 19:28 amr.c -rw-rw-r-- 1 stefan familie 11777 2005-03-07 00:20 apiexample.c -rw-rw-r-- 1 stefan familie 20931 2005-01-23 19:09 asv1.c -rw-rw-r-- 1 stefan familie 4726 2005-01-29 21:09 beosthread.c -rw-rw-r-- 1 stefan familie 8312 2004-12-29 18:50 bitstream.c -rw-rw-r-- 1 stefan familie 6869 2005-01-11 04:18 cabac.c -rw-rw-r-- 1 stefan familie 13948 2004-06-27 18:06 cinepak.c -rw-rw-r-- 1 stefan familie 3672 2005-02-24 20:08 cljr.c -rw-rw-r-- 1 stefan familie 5375 2004-05-21 16:37 cyuv.c -rw-rw-r-- 1 stefan familie 14358 2003-10-25 21:44 dct-test.c -rw-rw-r-- 1 stefan familie 11566 2004-09-28 05:09 dpcm.c -rw-rw-r-- 1 stefan familie 137744 2005-02-24 20:08 dsputil.c -rw-rw-r-- 1 stefan familie 7834 2004-09-12 19:35 dtsdec.c -rw-rw-r-- 1 stefan familie 29691 2005-01-23 19:09 dv.c -rw-rw-r-- 1 stefan familie 39991 2005-03-19 14:10 error_resilience.c -rw-rw-r-- 1 stefan familie 6298 2005-01-17 19:25 eval.c -rw-rw-r-- 1 stefan familie 3810 2004-02-23 17:07 faac.c -rw-rw-r-- 1 stefan familie 9497 2005-02-24 20:08 faad.c -rw-rw-r-- 1 stefan familie 6816 2004-05-18 19:09 faandct.c -rw-rw-r-- 1 stefan familie 3981 2003-03-06 12:32 fdctref.c -rw-rw-r-- 1 stefan familie 6272 2004-03-13 22:43 fft.c -rw-rw-r-- 1 stefan familie 6433 2004-03-13 22:43 fft-test.c -rw-rw-r-- 1 stefan familie 30829 2005-02-24 17:39 ffv1.c -rw-rw-r-- 1 stefan familie 24673 2005-02-28 06:27 flac.c -rw-rw-r-- 1 stefan familie 13815 2005-01-12 01:16 flicvideo.c -rw-rw-r-- 1 stefan familie 12292 2004-12-29 18:50 g726.c -rw-rw-r-- 1 stefan familie 9111 2004-01-22 13:09 golomb.c -rw-rw-r-- 1 stefan familie 28889 2005-01-23 19:09 h261.c -rw-rw-r-- 1 stefan familie 216388 2005-03-23 12:39 h263.c -rw-rw-r-- 1 stefan familie 27791 2005-03-07 00:20 h263dec.c -rw-rw-r-- 1 stefan familie 252168 2005-03-12 04:10 h264.c -rw-rw-r-- 1 stefan familie 2745 2004-09-27 21:47 h264idct.c -rw-rw-r-- 1 stefan familie 42143 2005-03-07 00:20 huffyuv.c -rw-rw-r-- 1 stefan familie 7907 2005-02-16 23:42 idcinvideo.c -rw-rw-r-- 1 stefan familie 67615 2005-01-12 01:16 imgconvert.c -rw-rw-r-- 1 stefan familie 22877 2005-01-12 01:59 imgresample.c -rw-rw-r-- 1 stefan familie 39685 2005-03-06 21:07 indeo3.c -rw-rw-r-- 1 stefan familie 5893 2004-07-15 16:06 integer.c -rw-rw-r-- 1 stefan familie 28674 2005-02-21 18:52 interplayvideo.c -rw-rw-r-- 1 stefan familie 9560 2003-10-30 23:51 jfdctfst.c -rw-rw-r-- 1 stefan familie 13994 2003-10-30 23:51 jfdctint.c -rw-rw-r-- 1 stefan familie 33977 2004-09-26 19:36 jrevdct.c -rw-rw-r-- 1 stefan familie 31730 2005-03-07 00:20 lcl.c -rw-rw-r-- 1 stefan familie 8758 2005-03-10 00:48 loco.c -rw-rw-r-- 1 stefan familie 22348 2005-02-01 16:13 mace.c -rw-rw-r-- 1 stefan familie 4535 2004-03-13 22:43 mdct.c -rw-rw-r-- 1 stefan familie 8040 2005-01-23 19:09 mdec.c -rw-rw-r-- 1 stefan familie 3730 2005-02-24 20:08 mem.c -rw-rw-r-- 1 stefan familie 70950 2005-02-24 20:08 mjpeg.c -rw-rw-r-- 1 stefan familie 72819 2005-02-24 20:08 motion_est.c -rw-rw-r-- 1 stefan familie 39249 2005-02-24 20:08 motion_est_template.c -rw-rw-r-- 1 stefan familie 3310 2003-03-06 12:32 motion_test.c -rw-rw-r-- 1 stefan familie 6363 2005-02-24 20:08 mp3lameaudio.c -rw-rw-r-- 1 stefan familie 110177 2005-03-08 21:35 mpeg12.c -rw-rw-r-- 1 stefan familie 23496 2005-02-24 20:08 mpegaudio.c -rw-rw-r-- 1 stefan familie 87709 2005-03-02 21:46 mpegaudiodec.c -rw-rw-r-- 1 stefan familie 242575 2005-03-19 14:10 mpegvideo.c -rw-rw-r-- 1 stefan familie 62303 2005-01-30 17:34 msmpeg4.c -rw-rw-r-- 1 stefan familie 9891 2005-01-23 19:09 msrle.c -rw-rw-r-- 1 stefan familie 11359 2005-01-23 19:09 msvideo1.c -rw-rw-r-- 1 stefan familie 8493 2004-12-18 17:20 oggvorbis.c -rw-rw-r-- 1 stefan familie 25854 2005-03-17 22:35 parser.c -rw-rw-r-- 1 stefan familie 10098 2005-02-14 00:36 pcm.c -rw-rw-r-- 1 stefan familie 29055 2005-01-23 19:09 png.c -rw-rw-r-- 1 stefan familie 15894 2005-01-23 19:09 pnm.c -rw-rw-r-- 1 stefan familie 4639 2004-05-26 22:04 pthread.c -rw-rw-r-- 1 stefan familie 4350 2005-01-23 22:36 qdrw.c -rw-rw-r-- 1 stefan familie 7071 2005-01-23 19:09 qpeg.c -rw-rw-r-- 1 stefan familie 18510 2005-01-23 19:09 qtrle.c -rw-rw-r-- 1 stefan familie 12777 2004-10-06 10:46 ra144.c -rw-rw-r-- 1 stefan familie 6911 2004-10-06 10:46 ra288.c -rw-rw-r-- 1 stefan familie 4525 2005-02-24 20:08 rangecoder.c -rw-rw-r-- 1 stefan familie 30482 2005-02-02 20:33 ratecontrol.c -rw-rw-r-- 1 stefan familie 2181 2004-07-15 16:06 rational.c -rw-rw-r-- 1 stefan familie 5711 2004-11-30 22:50 raw.c -rw-rw-r-- 1 stefan familie 9499 2005-01-12 19:25 resample2.c -rw-rw-r-- 1 stefan familie 7014 2005-02-24 20:08 resample.c -rw-rw-r-- 1 stefan familie 15380 2004-05-21 16:37 roqvideo.c -rw-rw-r-- 1 stefan familie 8795 2005-01-23 19:09 rpza.c -rw-rw-r-- 1 stefan familie 23997 2005-02-24 20:08 rv10.c -rw-rw-r-- 1 stefan familie 16361 2005-02-26 04:36 shorten.c -rw-rw-r-- 1 stefan familie 15947 2003-03-06 12:32 simple_idct.c -rw-rw-r-- 1 stefan familie 16829 2005-01-23 19:09 smc.c -rw-rw-r-- 1 stefan familie 111760 2005-03-15 22:05 snow.c -rw-rw-r-- 1 stefan familie 22535 2005-02-24 20:08 sonic.c -rw-rw-r-- 1 stefan familie 42996 2005-02-24 20:08 svq1.c -rw-rw-r-- 1 stefan familie 31151 2005-01-23 19:09 svq3.c -rw-rw-r-- 1 stefan familie 28855 2005-01-23 19:09 truemotion1.c -rw-rw-r-- 1 stefan familie 9103 2005-02-17 01:00 tscc.c -rw-rw-r-- 1 stefan familie 11833 2004-09-16 05:31 ulti.c -rw-rw-r-- 1 stefan familie 27226 2005-02-24 20:08 utils.c -rw-rw-r-- 1 stefan familie 82296 2005-02-23 18:24 vc9.c -rw-rw-r-- 1 stefan familie 4900 2005-02-24 20:08 vcr1.c -rw-rw-r-- 1 stefan familie 16335 2004-09-28 05:04 vmdav.c -rw-rw-r-- 1 stefan familie 101360 2005-03-03 03:24 vp3.c -rw-rw-r-- 1 stefan familie 6863 2004-05-18 19:09 vp3dsp.c -rw-rw-r-- 1 stefan familie 19343 2005-01-12 01:16 vqavideo.c -rw-rw-r-- 1 stefan familie 3913 2004-02-19 21:29 w32thread.c -rw-rw-r-- 1 stefan familie 43057 2004-12-29 18:50 wmadec.c -rw-rw-r-- 1 stefan familie 25487 2005-02-24 20:08 wmv2.c -rw-rw-r-- 1 stefan familie 4552 2005-03-19 13:30 x264.c -rw-rw-r-- 1 stefan familie 23109 2005-01-12 01:16 xan.c -rw-rw-r-- 1 stefan familie 3703 2005-01-23 19:09 xl.c -rw-rw-r-- 1 stefan familie 25940 2005-03-23 20:19 xvidff.c -rw-rw-r-- 1 stefan familie 10946 2004-10-01 14:31 xvmcvideo.c

5 15

Re: [MEncoder-users] capture: synchronization problems
by Kyle Schmitt 29 Mar '05

29 Mar '05

--- RC <rcooley(a)spamcop.net> wrote: > On Sat, 19 Mar 2005 20:52:55 +0100 > newsgrabber(a)poczta.onet.pl wrote: > > I think mjpeg gives a pretty good material for > further encoding into DVD or > > CVCD. Or do you know something better? > I don't know why you would use MJPEG. Why not just > capture with MPEG-2 with a rather high bitrate? The mpeg4 codecs of all descriptions have had a ton of work put into optimizing them for speed. Mpeg2 hasn't. Mjpeg stores each frame separately so it might not be computationally as intense, but it chokes your disc bandwidth (so you get dropped frames and out of sync and all sorts of nastiness). Go ahead and look at the fps your able to encode vcodec=mpeg4 vs vcodec=mjpeg or vcodec=mpeg2video. Don't turn on 101 quality optimizations like vhq and qpel and all that, just capture at plain vcodec=mepg4:vbitrate=4096. On every box I've ever used for tv capture (Pentium II 233, Pentium II 400, Athlon 700, Athlon 1800XP) mpeg4/divx encoding provided the best and most consistant framerates if I was capturing to a normal drive. When capturing to a striped raid array its a different story, but even then I don't know if the added visual acuity of mjpeg vs mpeg4 is worth it for the pain of setting it up(or if there will even BE a visible difference when capturing from broadcast tv) --Kyle __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail

10 26

segmentaion fault while encoding jpg to avi
by Matthias Schroeter 28 Mar '05

28 Mar '05

Hay the following problem shows up on two different machines: Suse 9.2 MEncoder 1.0pre6-3.3.4 FC 3 MEncoder 1.0pre6-3.4.2 using: mencoder mf://[1-2].jpg -mf w=256:h=512:fps=25:type=jpg -ovc lavc -lavcopts vcodec=mpeg4 -oac copy -o output.avi (adapted from http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-enc-images.html) mencoder exits with a segmentation fault: schroeter@rocky:~/physik/movie> mencoder mf://1_15_1.2_000[1-2].jpg -mf w=256:h=512:fps=25:type=jpg -ovc lavc -lavcopts vcodec=mpeg4 -oac copy -o output.avi MEncoder 1.0pre6-3.3.4 (C) 2000-2004 MPlayer Team CPU: Advanced Micro Devices Athlon Thunderbird (Family: 6, Stepping: 2) Detected cache-line size is 64 bytes CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0 Compiled with runtime CPU detection - WARNING - this is not optimal! To get best performance, recompile MPlayer with --disable-runtime-cpudetection. File not found: 'frameno.avi' Failed to open frameno.avi success: format: 16 data: 0x0 - 0x0 [demuxer] mf support. [mf] search expr: 1_15_1.2_000[1-2].jpg* [mf] number of files: 2 (8) VIDEO: [IJPG] 256x512 24bpp 25,000 fps 0,0 kbps ( 0,0 kbyte/s) [V] filefmt:16 fourcc:0x47504A49 size:256x512 fps:25,00 ftime:=0,0400 Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1 (-1=autodetect) osd: 1 ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffmjpeg] vfm:ffmpeg (FFmpeg MJPEG decoder) ========================================================================== Writing AVI header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. VDec: vo config request - 256 x 512 (preferred csp: Unknown) Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] The selected video_out device is incompatible with this codec. mp_image: Unknown out_fmt: 0x0 mp_image: Unknown out_fmt: 0x0ps Trem: 0min 0mb A-V:0,000 [0:0] Pos: 0,0s 2f ( 0%) 0fps Trem: 0min 0mb A-V:0,000 [0:0] Flushing video frames Speicherzugriffsfehler The last word is german for segmenation fault. Adding more images doesn't improve the suituation. Many thanks for your help Matthias Ghandi, asked on his arrival in Europe, what he thought of Western civilisation: "I think it would be an excellent idea." ############################################################################## Matthias Schröter Center for Nonlinear Dynamics University of Texas at Austin 1 University Station C1610 Austin, Texas 78712 http://chaos.ph.utexas.edu/~schroeter/ Office: ++ 1 512 471 5926 Lab: ++ 1 512 471 6933 Fax: ++ 1 512 471 1558 ##############################################################################

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container conversion from WMV to MOV?
by lists＠ropersonline.com 28 Mar '05

28 Mar '05

Hi, first post to this list. I'd like to ask how I can convert a .WMV file to .MOV _WITHOUT_ actually transcoding the video/audio stream(s). To explain: - I have a .WMV file [1] that contains content encoded with an esoteric Windows Media Player codec [2], the TSCC codec. - This TSCC codec (which again was originally developed for Windows Media Player) AFAIK is supported by MPlayer -- but only on x86 machines. I've got an iBook running Mac OS X 10.3.8, so I can't play the file with MPlayer [3]. - However, there is a compatible QuickTime plugin/codec (called EnSharpen [4]), which can play files encoded with the TSCC codec, _as long as they are in the QuickTime .MOV container format_. - I am thus looking for a way to convert the .WMV file to a .MOV without transcoding. Sounds confusing? Ok, here's what it is: Both .WMV and .MOV are essentially container formats. They contain the actual raw video content, either as separate video and audio streams, or as one muxed audio/video stream. (What's potentially confusing with .WMV is that the term "WMV" is used to both refer to the actual video stream inside .WMV or .ASF files and to the resulting files.) The contained streams can be in Apple's and Microsoft's "natively" supported formats or they can be encoded with other codecs. In my case, that stream is encoded with the TCSS codec. Now, what I want to do, I want to do a "container-level" conversion from the .WMV file to a .MOV file, that is I want to not touch the actual TSCC stream contained in the file -- so that I'm starting with a .WMV file containing a TSCC stream and I'm getting a .MOV file containing a TSCC stream. (No, simply renaming the file doesn't work, tried that.) This should allow me to then play the video with QuickTime+EnSharpen. Do people have any idea how I can do such a "container-level" conversion? I could not figure it out. Or am I taking the wrong approach and is there a different way to solve this challenge? Any suggestions very appreciated. Thanks and regards, Jens Ropers ---- www.ropersonline.com [1] The file is the "Introduction to using Linux" video from http://www.cbtnuggets.com/webapp/videos. I dumped the file to my local PC using mplayer -dumpfile intro_1.wmv -dumpstream mms://drm.cbtnuggets.com/freevideos/linux/intro_1.wmv [2] The codec in question is the TSCC, the Techsmith Screen Capture Codec -- http://www.techsmith.com/download/tsccdefault.asp. [3] I actually did try installing the codec on my iBook. I downloaded the codec _installer_ from http://www.techsmith.com/products/studio/codec.asp and run the installer on a Windows box, which allowed me to find the actual codec file tsccvid.dll and copy that to my Mac to /usr/local/lib/win32 and /usr/lib/win32 (I created the directories). That didn't work however -- and to be fair I didn't really expect it to. It seemed pretty obvious to me that the codec would only work on x86 and/or Windows, but I had to try it anyway, just because. [4] http://www.techsmith.com/products/ensharpen/default.asp? lid=EnSharpenHome

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mplayer cannot play AC3 anymore
by Stefan Frings 28 Mar '05

28 Mar '05

Hi, I compiled mplayer 1.0-pre6 (cvs) with gcc 3.3.5. Mplayer crashes when I play mpeg movies with AC3 audio. I upgraded to gcc 3.4.4 (pre release) but it did not help. I downgraded to gcc 2.95.4 but it did not help. I tried the same with mplayer 1.0-pre6a (tar.gz) successfully with all 3 gcc versions. This release can playback AC3 fine but does not have -mpegopts that I need. The problem is reproducible on my machine. I reinstalled all of thode gcc versions, liba52 and also the mplayer sources a few times. The probem occured always on the cvs version but never on the tar.gz release. My computer is an Athlon 3000+. My linux installation is debian sarge 32 bit because some drivers are not available for 64 bit. I added ffmpeg-0.4.9-pre1 and libdvdcss-1.2.8. But I assume that those pakcages are not AC3 related. How can we find the problem cause?

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Re: mplayer cannot play AC3 anymore
by Stefan Frings 28 Mar '05

28 Mar '05

I use gcc 3.3.5. I will give it a try

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audio delay after divix conversion
by Branislav Klocok 27 Mar '05

27 Mar '05

Hi All, First of all I would like to thank everybody for mplayer and mencoder, I am using them for years and its a great tool. Some time ago I have bought a divix/dvd player (philips) and found out that I can not play some of my divix movies due to q-pel compresion. (or something like that) I though ok so I will use mencoder to convert them. Which seemed to work perfectly with the command: mencoder inputmovie.avi -ovc lavc -oac lavc -lavcopts acodec=mp3 But after watching some of the converted movies I found out that in the beginning sound and picture are perfectly synchronized but during the movie the distance between picture and sound increases. The picture is always a bit ahead. The only thing I could think about was that during the conversion some frames are skipped from time to time (you can see that in console output), but the sound is coverted witout skipping anything. But this is just my guess. Can anybody help me with that?

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