March 2009 - MEncoder-users - lists.mplayerhq.hu

Help with MPG video encoding
by Walter Belhaven 20 Apr '13

20 Apr '13

Hi, I've got a question on how to get the best possible MPG encoding of a movie source, "at any price" so to speak -- i.e., as many bits as the encoder needs to get the highest possible video quality. It appears to me that the MPG encoding process is introducing artifacts that are present regardless of the amount of "free reign" I give to the encoder with respect to quantization, bitrate, and the like. My bottom line question is thus: "Are these artifacts inherent in MPG encoding, or am I just not twiddling the knobs and dials on the encoder correctly?" Here's all the details ... My source is a mixed hard- and soft-telecined "movie" at 1080/60i that I'm trying to tanscode to 480/24p, soft telecined to 480/60i, for ultimate burning to an NTSC DVD-Video. When I use mencoder to inverse telecine, crop out the crud, expand back to the original letterbox ratio (it's 2.35:1, not 16/9), and 'encode' the video with HUFFYUV (422P), the resulting video looks stunning, with no 'blocking' artifacts to speak of. This, of course, is as expected. But when I encode the video in MPG2 or MPG4, even with vqscale=1 or vqscale=2, I see sometimes severe blocking in the resulting video. Is this because the chroma is being subsampled vertically and horizontally (4:2:0), or is it because 'vqscale' is (perhaps necessary but) not sufficient to get "maximum quality at any price" encoding? Thanks, WB ____________________________________________________________________________________ Be a PS3 game guru. Get your game face on with the latest PS3 news and previews at Yahoo! Games. http://videogames.yahoo.com/platform?platform=120121

3 9

B-frames and GOP with MPEG-2 for DVD
by Nicolas Hesler 16 Apr '11

16 Apr '11

Can anyone offer any input to the following command line? I've been trying to refine for the highest possible quality of MPEG-2 while staying DVD compliant. The source is 24fps. (Note: format=mpeg2, because format=dvd does not work with Adobe Encore 2.0). From what I understand, keeping GOP open, improves quality. Is this true? Is it 100% DVD compliant? Do I want to introduce B frames in my encoding? (The vb_strategy part of my command line is currently useless, right?) If parts of my video are reaching into 9-10 Mbs bitrate, would it beneficial to introduce B-Frames? Will it improve quality? (This is probably a stupid question) Are the sync issues with bframes only relevant to mpeg4 or lavf? mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=mpeg2:tsaf:telecine / -vf scale=720:480,harddup -mc 0 -noskip -srate 48000 -af lavcresample=48000:0:2 -lavcopts / vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=7000:vbitrate=6000:keyint=12 / :trell:mbd=2:precmp=2:subcmp=2:cmp=2:dia=-10:predia=-10:cbp:mv0:vqmin=1:lmin=1 / :dc=10:vpass=1:vb_strategy=2:acodec=ac3:abitrate=224:aspect=16/9:vstrict=0 -ofps 24000/1001 -o $output $input

12 43

mcdeint=2 segfault
by Christian Ebert 12 Apr '09

12 Apr '09

Hello, On MacOS 10.5.6 mcdeint=2 segfaults. $ sw_vers ProductName: Mac OS X ProductVersion: 10.5.6 BuildVersion: 9G55 $ uname -a Darwin krille.blacktrash.org 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386 $ ls -l /usr/lib/libc.dylib lrwxr-xr-x 1 root wheel 15 Nov 14 17:22 /usr/lib/libc.dylib -> libSystem.dylib $ ls -l /usr/lib/libSystem* -r-xr-xr-x 1 root wheel 7895440 Nov 25 01:31 /usr/lib/libSystem.B.dylib -r-xr-xr-x 1 root wheel 14290032 Jul 10 2008 /usr/lib/libSystem.B_debug.dylib -r-xr-xr-x 1 root wheel 11204560 Jul 10 2008 /usr/lib/libSystem.B_profile.dylib lrwxr-xr-x 1 root wheel 17 Nov 14 17:22 /usr/lib/libSystem.dylib -> libSystem.B.dylib -r--r--r-- 1 root wheel 88544 Feb 19 2008 /usr/lib/libSystemStubs.a -r--r--r-- 1 root wheel 88544 Feb 19 2008 /usr/lib/libSystemStubs_debug.a -r--r--r-- 1 root wheel 88656 Feb 19 2008 /usr/lib/libSystemStubs_profile.a lrwxr-xr-x 1 root wheel 23 Nov 26 16:06 /usr/lib/libSystem_debug.dylib -> libSystem.B_debug.dylib lrwxr-xr-x 1 root wheel 25 Nov 26 16:06 /usr/lib/libSystem_profile.dylib -> libSystem.B_profile.dylib $ gcc -v Using built-in specs. Target: i686-apple-darwin9 Configured with: /var/tmp/gcc/gcc-5490~1/src/configure --disable-checking -enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.0/ --with-gxx-include-dir=/include/c++/4.0.0 --with-slibdir=/usr/lib --build=i686-apple-darwin9 --with-arch=apple --with-tune=generic --host=i686-apple-darwin9 --target=i686-apple-darwin9 Thread model: posix gcc version 4.0.1 (Apple Inc. build 5490) $ ld -v @(#)PROGRAM:ld PROJECT:ld64-85.2.1 $ as -v Apple Inc version cctools-698.1~1, GNU assembler version 1.38 Mencoder command and output: $ mencoder -msglevel all=9 -mc 0 -noskip -vfm ffmpeg -fps 25 -ofps 25 -field-dominance 1 \ -vf yadif=3,mcdeint=2:1:10,softskip,harddup \ -of lavf -lavfopts format=pal-dv -oac pcm -ovc lavc \ -lavcopts vcodec=dvvideo:vqscale=0 -o test.dv test.mov MEncoder SVN-r28904-4.0.1 (C) 2000-2009 MPlayer Team this_opt = option: mc Setting mc=0 this_opt = option: noskip Setting noskip=-vfm this_opt = option: vfm Setting vfm=ffmpeg this_opt = option: fps Setting fps=25 this_opt = option: ofps Setting ofps=25 this_opt = option: field-dominance Setting field-dominance=1 this_opt = option: vf Setting vf=yadif=3,mcdeint=2:1:10,softskip,harddup this_opt = option: of Setting of=lavf this_opt = option: lavfopts Setting lavfopts=format=pal-dv this_opt = option: oac Setting oac=pcm this_opt = option: ovc Setting ovc=lavc this_opt = option: lavcopts Setting lavcopts=vcodec=dvvideo:vqscale=0 this_opt = option: o Setting o=test.dv Adding file test.mov Configuration: --prefix=/usr/local --with-extralibdir=/sw/lib --with-extraincdir=/sw/include --disable-dvdread-internal init_freetype get_path('font/font.desc') -> '/Users/chris/.mplayer/font/font.desc' font: can't open file: /Users/chris/.mplayer/font/font.desc font: can't open file: /usr/local/share/mplayer/font/font.desc Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay Config pushed level is now 2 Config pushed level is now 3 [file] File size is 993783801 bytes STREAM: [file] test.mov STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) success: format: 0 data: 0x0 - 0x3b3beff9 s->pos=0 newpos=0 new_bufpos=0 buflen=0 LAVF_check: QuickTime/MPEG-4/Motion JPEG 2000 format libavformat file format detected. mp_seek(0x1805200, 0, 65536) 32768=mp_read(0x1805200, 0x131d00c, 32768), eof:0 mp_seek(0x1805200, 993756800, 0) s->pos=8000 newpos=3B3B8000 new_bufpos=3B3B8680 buflen=0 27001=mp_read(0x1805200, 0x131d00c, 32768), eof:1 mp_seek(0x1805200, 993783801, 0) s->pos=3B3BEFF9 newpos=3B3BE800 new_bufpos=3B3BEFF9 buflen=0 stream_seek: WARNING! Can't seek to 0x3B3BEFF9 ! s->pos=0 newpos=3B3BE800 new_bufpos=3B3BEFF9 buflen=0 mp_seek(0x1805200, 993783801, 0) s->pos=3B3BEFF9 newpos=3B3BE800 new_bufpos=3B3BEFF9 buflen=0 mp_seek(0x1805200, 512, 0) s->pos=3B3BEFF9 newpos=0 new_bufpos=200 buflen=0 192000=mp_read(0x1805200, 0x136b000, 192000), eof:0 mp_seek(0x1805200, 192512, 0) s->pos=2F000 newpos=2F000 new_bufpos=2F000 buflen=0 144000=mp_read(0x1805200, 0x139a000, 144000), eof:0 mp_seek(0x1805200, 336512, 0) 144000=mp_read(0x1805200, 0x1466000, 144000), eof:0 mp_seek(0x1805200, 480512, 0) 144000=mp_read(0x1805200, 0x148a000, 144000), eof:0 mp_seek(0x1805200, 624512, 0) 144000=mp_read(0x1805200, 0x14ae000, 144000), eof:0 mp_seek(0x1805200, 768512, 0) 144000=mp_read(0x1805200, 0x14d2000, 144000), eof:0 mp_seek(0x1805200, 912512, 0) 144000=mp_read(0x1805200, 0x14f6000, 144000), eof:0 mp_seek(0x1805200, 1056512, 0) 144000=mp_read(0x1805200, 0x151a000, 144000), eof:0 mp_seek(0x1805200, 1200640, 0) 144000=mp_read(0x1805200, 0x153e000, 144000), eof:0 mp_seek(0x1805200, 1344640, 0) 144000=mp_read(0x1805200, 0x1562000, 144000), eof:0 mp_seek(0x1805200, 1488640, 0) 144000=mp_read(0x1805200, 0x1586000, 144000), eof:0 mp_seek(0x1805200, 1632640, 0) 144000=mp_read(0x1805200, 0x15aa000, 144000), eof:0 mp_seek(0x1805200, 1776640, 0) 144000=mp_read(0x1805200, 0x15ce000, 144000), eof:0 mp_seek(0x1805200, 1920640, 0) 144000=mp_read(0x1805200, 0x15f2000, 144000), eof:0 mp_seek(0x1805200, 2064640, 0) 144000=mp_read(0x1805200, 0x1616000, 144000), eof:0 mp_seek(0x1805200, 2208768, 0) 144000=mp_read(0x1805200, 0x163a000, 144000), eof:0 mp_seek(0x1805200, 2352768, 0) 144000=mp_read(0x1805200, 0x165e000, 144000), eof:0 mp_seek(0x1805200, 2496768, 0) 144000=mp_read(0x1805200, 0x1682000, 144000), eof:0 mp_seek(0x1805200, 2640768, 0) 144000=mp_read(0x1805200, 0x16a6000, 144000), eof:0 mp_seek(0x1805200, 2784768, 0) 144000=mp_read(0x1805200, 0x16ca000, 144000), eof:0 mp_seek(0x1805200, 2928768, 0) 144000=mp_read(0x1805200, 0x16ee000, 144000), eof:0 mp_seek(0x1805200, 3072768, 0) 144000=mp_read(0x1805200, 0x1712000, 144000), eof:0 mp_seek(0x1805200, 3216896, 0) 144000=mp_read(0x1805200, 0x1736000, 144000), eof:0 mp_seek(0x1805200, 3360896, 0) 144000=mp_read(0x1805200, 0x175a000, 144000), eof:0 mp_seek(0x1805200, 3504896, 0) 144000=mp_read(0x1805200, 0x177e000, 144000), eof:0 mp_seek(0x1805200, 3648896, 0) 144000=mp_read(0x1805200, 0x17a2000, 144000), eof:0 mp_seek(0x1805200, 3792896, 0) s->pos=39E000 newpos=39E000 new_bufpos=39E000 buflen=0 192000=mp_read(0x1805200, 0x17c6000, 192000), eof:0 mp_seek(0x1805200, 3984896, 0) 144000=mp_read(0x1805200, 0x2000000, 144000), eof:0 mp_seek(0x1805200, 993769984, 0) s->pos=3F0800 newpos=3B3BB800 new_bufpos=3B3BBA00 buflen=0 13817=mp_read(0x1805200, 0x131d00c, 32768), eof:1 mp_seek(0x1805200, 4128896, 0) s->pos=0 newpos=3F0000 new_bufpos=3F0080 buflen=0 144000=mp_read(0x1805200, 0x2024000, 144000), eof:0 mp_seek(0x1805200, 4272896, 0) 144000=mp_read(0x1805200, 0x2048000, 144000), eof:0 mp_seek(0x1805200, 4416896, 0) 144000=mp_read(0x1805200, 0x206c000, 144000), eof:0 mp_seek(0x1805200, 4560896, 0) s->pos=459800 newpos=459800 new_bufpos=459800 buflen=0 144000=mp_read(0x1805200, 0x2090000, 144000), eof:0 mp_seek(0x1805200, 4704896, 0) 144000=mp_read(0x1805200, 0x20b4000, 144000), eof:0 mp_seek(0x1805200, 4848896, 0) 144000=mp_read(0x1805200, 0x20d8000, 144000), eof:0 mp_seek(0x1805200, 4993024, 0) s->pos=4C3000 newpos=4C3000 new_bufpos=4C3000 buflen=0 144000=mp_read(0x1805200, 0x20fc000, 144000), eof:0 mp_seek(0x1805200, 0, 65536) ==> Found video stream: 0 [lavf] Video stream found, -vid 0 aspect= 720*0/(576*1) ======= VIDEO Format ====== biSize 60 biWidth 720 biHeight 576 biPlanes 0 biBitCount 24 biCompression 1885566564='dvcp' biSizeImage 1244160 Unknown extra header dump: [0] [0] [0] [a] [66] [69] [65] [6c] [2] [e] [0] [0] [0] [a] [66] [69] [65] [6c] [2] [e] =========================== ==> Found audio stream: 1 [lavf] Audio stream found, -aid 1 ======= WAVE Format ======= Format Tag: 1 (0x1) Channels: 2 Samplerate: 48000 avg byte/sec: 0 Block align: 1 bits/sample: 16 cbSize: 0 ========================================================================== LAVF: 1 audio and 1 video streams found LAVF: build 3415809 VIDEO: [dvcp] 720x576 24bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:44 fourcc:0x70637664 size:720x576 fps:25.000 ftime:=0.0400 Input fps will be interpreted as 25.000 instead. ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder dec_audio: Allocating 2048 + 65536 = 67584 bytes for output buffer. AUDIO: 48000 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->192000) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== [file] File size is 0 bytes STREAM: [file] test.dv STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) ** MUXER_LAVF ***************************************************************** REMEMBER: MEncoder's libavformat muxing is presently broken and can generate INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer will play these INCORRECT files as if nothing were wrong! ******************************************************************************* OK, exit. ALLOCATED STREAM N. 1, type=0 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: [softskip] Opening video filter: [mcdeint=2:1:10] Opening video filter: [yadif=3] ========================================================================== Trying to force video codec driver family ffmpeg... Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Unsupported PixelFormat -1 INFO: libavcodec init OK! Selected video codec: [ffdv] vfm: ffmpeg (FFmpeg DV) ========================================================================== ALLOCATED STREAM N. 2, type=1 Building audio filter chain for 48000Hz/2ch/s16le -> 0Hz/0ch/??... [libaf] Adding filter dummy [dummy] Was reinitialized: 48000Hz/2ch/s16le [libaf] Adding filter format [format] Changing sample format from little-endian 16-bit signed int to big-endian 8-bit signed int [dummy] Was reinitialized: 48000Hz/2ch/s16le [format] Changing sample format from little-endian 16-bit signed int to big-endian 8-bit signed int Building audio filter chain for 48000Hz/2ch/s16le -> 48000Hz/2ch/s16le... [dummy] Was reinitialized: 48000Hz/2ch/s16le [format] Changing sample format from little-endian 16-bit signed int to big-endian 8-bit signed int [libaf] Removing filter format [dummy] Was reinitialized: 48000Hz/2ch/s16le ======= WAVE Format ======= Format Tag: 1 (0x1) Channels: 2 Samplerate: 48000 avg byte/sec: 192000 Block align: 4 bits/sample: 16 cbSize: 0 ========================================================================== demux_lavf_fill_buffer() Increasing filtered audio buffer size from 0 to 65536 demux_lavf_fill_buffer() vd_ffmpeg data: bf00071f, 787878f8, ffffffff, ffffffff [ffmpeg] aspect_ratio: 0.000000 VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12) Trying filter chain: yadif mcdeint softskip harddup expand lavc vo_debug: query(Planar 411P) returned 0x0 (i=0) vo_debug: query(Planar 422P) returned 0x0 (i=1) vo_debug: query(Planar YV12) returned 0x401 (i=2) VDec: using Planar YV12 as output csp (no 2) Movie-Aspect is 1.37:1 - prescaling to correct movie aspect. VO Config (720x576->786x576,flags=0,'MPlayer',0x32315659) REQ: flags=0x401 req=0x0 REQ: flags=0x401 req=0x0 REQ: flags=0x401 req=0x0 REQ: flags=0x401 req=0x0 REQ: flags=0x401 req=0x0 videocodec: libavcodec (720x576 fourcc=64737664 [dvsd]) [VE_LAVC] Using constant qscale = 0.000000 (VBR). using IP *** [yadif] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x3c41000,0x3cbf900,0x3ca6400 strides: 720,360,360, chroma: 360x288, shift: h:1,v:1) Pos: 0.0s 1f ( 0%) 0fps Trem: 0min 0mb A-V:0.000 [0:0] A/Vms 0/16 D/B/S 0/1/0 demux_lavf_fill_buffer() vd_ffmpeg data: bf00071f, 787878f8, ffffffff, ffffffff using IP *** [yadif] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x3cda000,0x3d58900,0x3d3f400 strides: 720,360,360, chroma: 360x288, shift: h:1,v:1) *** [mcdeint] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x3d73000,0x3df1900,0x3dd8400 strides: 720,360,360, chroma: 360x288, shift: h:1,v:1) *** [softskip] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x3e0c000,0x3e8a900,0x3e71400 strides: 720,360,360, chroma: 360x288, shift: h:1,v:1) *** [harddup] Exporting mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x0,0x0,0x0 strides: 0,0,0, chroma: 360x288, shift: h:1,v:1) *** [expand] Exporting mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x0,0x0,0x0 strides: 0,0,0, chroma: 360x288, shift: h:1,v:1) *** [lavc] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes (imgfmt: 32315659, planes: 0x417e000,0x41fc900,0x41e3400 strides: 720,360,360, chroma: 360x288, shift: h:1,v:1) get_path('subfont.ttf') -> '/Users/chris/.mplayer/subfont.ttf' Unicode font: 5009 glyphs. get_path('subfont.ttf') -> '/Users/chris/.mplayer/subfont.ttf' Unicode font: 5009 glyphs. OSD chg: 5 V: no pb:-1 OSD chg: 3 V: no pb:-1 OSD chg: 2 V: no pb:-1 Muxer frame buffer sending 2 frame(s) to the muxer. VIDEO CODEC ID: 25 AUDIO CODEC ID: 10000, TAG: 0 MUXER_LAVF(audio stream) frame_size: 1, scale: 1, sps: 48000, rate: 48000, ctx->block_align = stream->wf->nBlockAlign; 0=4 stream->wf->nAvgBytesPerSec:192000 Writing header... Segmentation fault Simple attempt at gdb backtrace: (gdb) run -mc 0 -noskip -vfm ffmpeg -fps 25 -ofps 25 -field-dominance 1 -vf yadif=3,mcdeint=2:1:10,softskip,harddup -of lavf -lavfopts format=pal-dv -oac pcm -ovc lavc -lavcopts vcodec=dvvideo:vqscale=0 -o test.dv test.mov Starting program: /usr/local/bin/mencoder -mc 0 -noskip -vfm ffmpeg -fps 25 -ofps 25 -field-dominance 1 -vf yadif=3,mcdeint=2:1:10,softskip,harddup -of lavf -lavfopts format=pal-dv -oac pcm -ovc lavc -lavcopts vcodec=dvvideo:vqscale=0 -o test.dv test.mov Reading symbols for shared libraries ++++++++++++++++++++++++++++++................................................................................. done MEncoder SVN-r28904-4.0.1 (C) 2000-2009 MPlayer Team success: format: 0 data: 0x0 - 0x3b3beff9 libavformat file format detected. [lavf] Video stream found, -vid 0 [lavf] Audio stream found, -aid 1 VIDEO: [dvcp] 720x576 24bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:44 fourcc:0x70637664 size:720x576 fps:25.000 ftime:=0.0400 Input fps will be interpreted as 25.000 instead. ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 48000 Hz, 2 ch, s16le, 0.0 kbit/0.00% (ratio: 0->192000) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== ** MUXER_LAVF ***************************************************************** REMEMBER: MEncoder's libavformat muxing is presently broken and can generate INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer will play these INCORRECT files as if nothing were wrong! ******************************************************************************* OK, exit. 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: [softskip] Opening video filter: [mcdeint=2:1:10] Opening video filter: [yadif=3] ========================================================================== Trying to force video codec driver family ffmpeg... Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Unsupported PixelFormat -1 Selected video codec: [ffdv] vfm: ffmpeg (FFmpeg DV) ========================================================================== VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12) VDec: using Planar YV12 as output csp (no 2) Movie-Aspect is 1.37:1 - prescaling to correct movie aspect. videocodec: libavcodec (720x576 fourcc=64737664 [dvsd]) [VE_LAVC] Using constant qscale = 0.000000 (VBR). VIDEO CODEC ID: 25f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0] AUDIO CODEC ID: 10000, TAG: 0 Writing header... Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: 13 at address: 0x00000000 0x00559819 in ?? () (gdb) bt #0 0x00559819 in ?? () #1 0x000002f0 in ?? () Previous frame inner to this frame (gdb could not unwind past this frame) I'm not experienced with gdb, would need instructions to squeeze more info out. TIA c -- \black\trash movie _C O W B O Y_ _C A N O E_ _C O M A_ Ein deutscher Western/A German Western -->> http://www.blacktrash.org/underdogma/ccc.html -->> http://www.blacktrash.org/underdogma/ccc-en.html

6 24

Skipped and duplicate frames
by Peter 02 Apr '09

02 Apr '09

I'm trying to convert some movies from a digital camera at 30fps from MJPEG to XVID to save space. I'm getting lots of skipped frames and duplicate frame messages, although the input file seems fine, and indeed the output file seems fine, too. The messages seem serious, in that I would have expected to see doubled and missing frames (but I don't). Can anyone help me understand why I'm getting these errors, when apparently there's nothing wrong? I've reduced my command line to the minimum. D:\Samsung\2009_03_12>\me\mencoder -oac mp3lame -lameopts preset=standard:fast - ovc xvid -xvidencopts bitrate=2000000 -ofps 30 -o ".\XVID\S6301641.AVI" "S630164 1.AVI" MEncoder Sherpya-SVN-r27811-4.2.5 (C) 2000-2008 MPlayer Team CPU: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (Family: 6, Model: 15, Step ping: 11) CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 success: format: 0 data: 0x0 - 0x2e5fc54 AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 1 VIDEO: [MJPG] 640x480 24bpp 30.000 fps 9337.0 kbps (1139.8 kbyte/s) [V] filefmt:3 fourcc:0x47504A4D size:640x480 fps:30.000 ftime:=0.0333 ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 22050 Hz, 1 ch, s16le, 352.8 kbit/100.00% (ratio: 44100->44100) Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) ========================================================================== xvid: using library version 1.1.3 (build xvid-1.1.3) Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1, osd: 1, aspect: 0.000000, round: 1 ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG decoder) ========================================================================== MP3 audio selected. VDec: vo config request - 640 x 480 (preferred colorspace: Planar 422P) Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] VDec: using Planar 422P as output csp (no 1) Movie-Aspect is undefined - no prescaling applied. SwScaler: reducing / aligning filtersize 1 -> 4 SwScaler: reducing / aligning filtersize 1 -> 4 SwScaler: reducing / aligning filtersize 1 -> 1 SwScaler: reducing / aligning filtersize 9 -> 8 [swscaler @ 00DAB6F4]BICUBIC scaler, from yuv422p to yuv420p using MMX2 [swscaler @ 00DAB6F4]using 4-tap MMX scaler for horizontal luminance scaling [swscaler @ 00DAB6F4]using 4-tap MMX scaler for horizontal chrominance scaling [swscaler @ 00DAB6F4]using 1-tap MMX "scaler" for vertical scaling (YV12 like) [swscaler @ 00DAB6F4]640x480 -> 640x480 videocodec: XviD (640x480 fourcc=44495658 [XVID]) xvid: par=0/0 (vga11), displayed=640x480, sampled=640x480 xvid: CBR Rate Control -- bitrate=2000kbit/s Writing header... ODML: vprp aspect is 4:3. Setting audio delay to 0.026s. Writing header... ODML: vprp aspect is 4:3. Setting audio delay to 0.026s. Pos: 0.7s 22f ( 3%) 0.00fps Trem: 0min 3mb A-V:0.070 [0:60] Skipping frame! Pos: 1.0s 33f ( 4%) 0.00fps Trem: 0min 4mb A-V:0.069 [0:60] Skipping frame! Pos: 3.8s 117f (12%) 41.79fps Trem: 0min 6mb A-V:0.069 [1581:66] Skipping frame! Pos: 4.1s 127f (12%) 41.19fps Trem: 0min 6mb A-V:0.069 [1626:62] Skipping frame! Pos: 4.4s 137f (13%) 40.85fps Trem: 0min 6mb A-V:0.069 [1618:58] Skipping frame! Pos: 4.7s 147f (14%) 40.34fps Trem: 0min 6mb A-V:0.069 [1618:56] Skipping frame! Pos: 5.0s 157f (14%) 39.55fps Trem: 0min 6mb A-V:0.069 [1662:53] Skipping frame! Pos: 5.5s 175f (15%) 39.02fps Trem: 0min 7mb A-V:0.025 [1686:50]

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Removing Duplicate Frames
by Jeremy Hood 01 Apr '09

01 Apr '09

I have video clips that have duplicated frames in them and I'd like to use mencoder to remove those duplicated frames. I think I've figured out how to get mencoder to identify the duplicatd frames with the "decimate" command, but, when I play back the video clips, there is still a time delay during the period where the duplicated frames were. It's like mencoder inserts blank frames to essentially "pause" playback until it comes time for the next frame. That's not the behavior I want. I want it to go straight to the next non-duplicated frame at the video's frame rate. Does that make sense? Here's an illustration of what I mean. Pretend that the numbers are the consecutive frames in a video clip, starting at 1. Pretend that underscores ("_") are zero-length frames inserted by mencoder to effectively "pause" playback: This is what I have: 1 2 3 3 3 3 4 5 6 ... After using the decimate command to remove the duplicate frames, here's what mencoder gives me: 1 2 3 _ _ _ 4 5 6 ... Here's what I want (note that there is no time delay between frame numbers 3 and 4 other than the frame rate of the video): 1 2 3 4 5 6 ... Jeremy Hood Software Engineer LaserCraft Inc.

2 3

order in filter chain for eq2 and scale
by Christian Ebert 01 Apr '09

01 Apr '09

Hi, What's the canonical order of the eq2 and scale filters? So far I do eq2=<params>,scale. Is this correct or should it be the other way round? TIA c -- Was heißt hier Dogma, ich bin Underdogma! [ What the hell do you mean dogma, I am underdogma. ] _F R E E_ _V I D E O S_ http://www.blacktrash.org/underdogma/ http://www.blacktrash.org/underdogma/index-en.html

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Sync problem with newer mencoder version
by Florian Sollinger 01 Apr '09

01 Apr '09

Hello! I know audio/video synchronisation problems have been discussed before, but i can't find a solution to my problem: I have a mpeg 4 video, recorded with a Nokia mobile phone. The video has a variable framerate. Now i want to re-encode it into a flv file. With the mencoder of MPlayer 1.0rc2-4.2.1 everything works fine. But with MPlayer GIT-6e54f40-4.2.1-sjlj-Kovensky-mt 20090304 or MPlayer SVN-r29040-4.3.2 the audio is out of sync. What happened between this versions? The convert string i used was: mencoder input.mp4 -ofps 24000/1001 -mc 0 -of lavf -oac mp3lame -lameopts abr:br=56 -srate 22050 -ovc lavc -lavcopts vcodec=flv:vbitrate=400:trell:v4mv:cbp:last_pred=3 -vf harddup,scale=480:360 -o output.flv Unfortunately i need to run this on a server where i cannot install another version. Thanks for your help. Florian

2 3

Segmentation fault when reading certain DVDs
by Dave Hill 31 Mar '09

31 Mar '09

Hi, I have a bug to report along with a proposal for a fix. I've been getting a segmentation fault when trying to convert some dvds to avi. The most recent case was a copy of a season of The Office that I created using k9copy to create an iso from the original and then k3b to burn it. That must have somehow created a non-standard dvd header which libdvdread complains about at initialization. However, this does not appear to effect mencoder's ability to read the DVD data. This is the first pass of a two-pass encode, but it segmentation faults at the end. Here is the output: [root@dtv-fe mplayer]# mencoder -ffourcc DIVX -ovc lavc -lavcopts vpass=1:turbo:vcodec=mpeg4:vhq:v4mv:vqmin=2:autoaspect:vbitrate=1500 -alang en -vf scale=640:-2 -af volume=10 -oac mp3lame dvd://4 -endpos 30 -o /dev/null -of avi MEncoder SVN-r29105-4.3.2 (C) 2000-2009 MPlayer Team libdvdread: Using libdvdcss version 1.2.10 for DVD access *** libdvdread: CHECK_VALUE failed in libdvdread4/ifo_read.c:1263 *** *** for ptl_mait->nr_of_vtss != 0 *** *** Zero check failed in libdvdread4/ifo_read.c:1292 for ptl_mait->countries[i].zero_1 = 0x0024 *** Zero check failed in libdvdread4/ifo_read.c:1293 for ptl_mait->countries[i].zero_2 = 0x032c *** Zero check failed in libdvdread4/ifo_read.c:1292 for ptl_mait->countries[i].zero_1 = 0x0634 *** Zero check failed in libdvdread4/ifo_read.c:1293 for ptl_mait->countries[i].zero_2 = 0x093c *** Zero check failed in libdvdread4/ifo_read.c:1292 for ptl_mait->countries[i].zero_1 = 0x0c44 *** Zero check failed in libdvdread4/ifo_read.c:1293 for ptl_mait->countries[i].zero_2 = 0x0f4c *** Zero check failed in libdvdread4/ifo_read.c:1292 for ptl_mait->countries[i].zero_1 = 0x1254 *** Zero check failed in libdvdread4/ifo_read.c:1293 for ptl_mait->countries[i].zero_2 = 0x0307 *** libdvdread: CHECK_VALUE failed in libdvdread4/ifo_read.c:1295 *** *** for ptl_mait->countries[i].pf_ptl_mai_start_byte + 8*2 * (ptl_mait->nr_of_vtss + 1) <= ptl_mait->last_byte + 1 *** libdvdread: Unable to seak PTL_MAIT table. There are 22 titles on this DVD. There are 1 angles in this DVD title. . . . Pos: 30.0s 738f ( 2%) 106.57fps Trem: 4min 235mb A-V:0.017 [1292:233] Flushing video frames. Writing index... Writing header... ODML: vprp aspect is 16:9. Video stream: 1292.172 kbit/s (161521 B/s) size: 4850491 bytes 30.030 secs 738 frames Audio stream: 233.229 kbit/s (29153 B/s) size: 874608 bytes 30.000 secs Segmentation fault I downloaded the source, rebuilt with debugging and found the issue. It was crashing at: Program received signal SIGSEGV, Segmentation fault. 0x0816aebb in ifoFree_PTL_MAIT (ifofile=0x8b1e1a8) at libdvdread4/ifo_read.c:1352 The issue was that some of the pointers were being freed earlier (at the "Unable to seak PTL_MAIT"), but there was still a reference to that freed memory that was being double-freed later. I wasn't sure where/who to tell about the fix - hopefully, I'm posting it to the right place. Dave [root@dtv-fe mplayer]# svn diff libdvdread4/ Index: libdvdread4/ifo_read.c =================================================================== --- libdvdread4/ifo_read.c (revision 1168) +++ libdvdread4/ifo_read.c (working copy) @@ -1304,18 +1304,21 @@ fprintf(stderr, "libdvdread: Unable to seak PTL_MAIT table.\n"); free(ptl_mait->countries); free(ptl_mait); + ifofile->ptl_mait = 0; return 0; } info_length = (ptl_mait->nr_of_vtss + 1) * sizeof(pf_level_t); pf_temp = (uint16_t *)malloc(info_length); if(!pf_temp) { free_ptl_mait(ptl_mait, i); + ifofile->ptl_mait = 0; return 0; } if(!(DVDReadBytes(ifofile->file, pf_temp, info_length))) { fprintf(stderr, "libdvdread: Unable to read PTL_MAIT table.\n"); free(pf_temp); free_ptl_mait(ptl_mait, i); + ifofile->ptl_mait = 0; return 0; } for (j = 0; j < ((ptl_mait->nr_of_vtss + 1) * 8); j++) { @@ -1325,6 +1328,7 @@ if(!ptl_mait->countries[i].pf_ptl_mai) { free(pf_temp); free_ptl_mait(ptl_mait, i); + ifofile->ptl_mait = 0; return 0; } { /* Transpose the array so we can use C indexing. */ @@ -1349,7 +1353,8 @@ if(ifofile->ptl_mait) { for(i = 0; i < ifofile->ptl_mait->nr_of_countries; i++) { - free(ifofile->ptl_mait->countries[i].pf_ptl_mai); + if (ifofile->ptl_mait->countries[i].pf_ptl_mai) + free(ifofile->ptl_mait->countries[i].pf_ptl_mai); } free(ifofile->ptl_mait->countries); free(ifofile->ptl_mait); [root@dtv-fe mplayer]#

2 1

-quiet and progress meter
by Andrew Berg 31 Mar '09

31 Mar '09

I get a bunch of messages about skipped frames, but the output is fine. I've been using -quiet to suppress the messages, but it also prevents the progress meter from appearing. How do I suppress the messages and still get the progress meter?

2 1

Compilation pbm SVN-r29067-4.1.2
by John Doe 30 Mar '09

30 Mar '09

Hi, I have some troubles with SVN-r29067-4.1.2 on CentOS 5.2 make[1]: Entering directory `/Install/video/mplayer/libavformat' cc -DHAVE_AV_CONFIG_H -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -I.. -I.. -Wundef -Wdisabled-optimization -Wno-pointer-sign -Wdeclaration-after-statement -std=gnu99 -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -O4 -march=prescott -mtune=prescott -pipe -ffast-math -fomit-frame-pointer -D_REENTRANT -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -I. -Ilibdvdread4 -c -o output-example.o output-example.c cc -L../libavcodec -L../libavutil -o output-example output-example.o libavformat.a -lavcodec -lavutil -L/P/video/lib cc: libavformat.a: No such file or directory I use --extra-libs="-L/P/video/lib" and # ll /P/video/lib/libavformat.a -rw-r--r-- 1 jd jd 973762 Mar 27 17:24 /P/video/lib/libavformat.a With an older version, I was successfuly using: --with-extraincdir and --with-extralibdir I also did set LD_LIBRARY_PATH and LD_RUN_PATH Any idea what could be missing...? Thx, JD

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