April 2007 - 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

using mf:// with stdin
by Morris Beverly 15 May '07

15 May '07

Is it possible to output a series of image files onto stdin and have mencoder encode them to an avi? I haven't been able to find an example of this and don't know if it can be done this way. I'm currently using a an image processing program to output jpegs to files & then using the normal mf://*.jpg to create the video. I'd like to save the time & disk space of writing the files out. I can also send out some sort of raw or encoded format if that would work better with some other input option. I'm open to any other ideas for how to do this. thanks, morris

4 11

Bug: floating point exception when converting to DV
by Levente Novák 14 May '07

14 May '07

I would like to transcode a mpeg2 material to DV (raw DV, not DV Avi), but mencoder gets a floating point exception before writing any frame. This happens with all types of input files when output is set to DV; however, DV Avi works OK (at least it gives playable files). Here is my command line: mencoder birthday.mpg -of lavf -lavfopts \ i_certify_that_my_video_stream_does_not_use_b_frames:format=dv \ -oac pcm -ovc lavc -lavcopts vcodec=dvvideo -o birthday.dv Here is the gdb output: gdb /tmp/trunk/mencoder GNU gdb 6.4.90-debian Copyright (C) 2006 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i486-linux-gnu"...Using host libthread_db library "/ lib/tls/i686/cmov/libthread_db.so.1". (gdb) run -v birthday.mpg -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames:format=dv -oac pcm -ovc lavc -lavcopts vcodec=dvvideo -o birthday.dv Starting program: /tmp/trunk/mencoder -v birthday.mpg -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames:format=dv -oac pcm -ovc lavc -lavcopts vcodec=dvvideo -o birthday.dv [Thread debugging using libthread_db enabled] [New Thread -1213974848 (LWP 28294)] MEncoder dev-SVN-r23112-4.1.2 (C) 2000-2007 MPlayer Team CPU: Intel(R) Celeron(R) CPU 3.06GHz (Family: 15, Model: 4, Stepping: 1) CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1 Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2 Configuration: --enable-debug=3 init_freetype get_path('font/font.desc') -> '/home/novakl/.mplayer/font/font.desc' font: can't open file: /home/novakl/.mplayer/font/font.desc font: can't open file: /usr/local/share/mplayer/font/font.desc Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay [file] File size is 800323584 bytes STREAM: [file] birthday.mpg STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) success: format: 0 data: 0x0 - 0x2fb3f800 Checking for YUV4MPEG2 ASF_check: not ASF guid! Checking for NuppelVideo Checking for REAL Checking for SMJPEG Searching demuxer type for filename birthday.mpg ext: .mpg LAVF_check: MPEG PS format Checking for Nullsoft Streaming Video Checking for MOV Checking for VIVO header block 1 size: 0 AVS: avs_check_file - attempting to open file birthday.mpg AVS: File is too big, aborting... Checking for PVA Checking for MPEG-TS... TRIED UP TO POSITION 66800, FOUND 47, packet_size= 0, SEEMS A TS? 0 Checking for LMLM4 Stream Format Invalid packet in LMLM4 stream: ch=0 size=1140851704 LMLM4 Stream Format not found system stream synced at 0xD (13)! ==> Found video stream: 0 ==> Found audio stream: 0 MPEG-PS file format detected. Searching for sequence header... OK! VIDEO: MPEG2 720x576 (aspect 2) 25.000 fps 8000.0 kbps (1000.0 kbyte/s) [V] filefmt:2 fourcc:0x10000002 size:720x576 fps:25.00 ftime:=0.0400 ========================================================================== Opening audio decoder: [mp3lib] MPEG layer-2, layer-3 dec_audio: Allocating 4608 + 65536 = 70144 bytes for output buffer. mp3lib: made decode tables with MMX optimization mp3lib: using SSE optimized decore! MP3lib: init layer2&3 finished, tables done MPEG 1.0, Layer II, 48000 Hz 192 kbit Single-Channel, BPF: 576 Channels: 1, copyright: No, original: Yes, CRC: No, emphasis: 0 AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000) Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3) ========================================================================== [file] File size is 0 bytes STREAM: [file] birthday.dv STREAM: Description: File STREAM: Author: Albeu STREAM: Comment: based on the code from ??? (probably Arpi) ** MUXER_LAVF ***************************************************************** You have certified that your video stream does not contain B frames. REMEMBER: MEncoder's libavformat muxing is presently broken and will 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 decoder: [mpegpes] MPEG 1/2 Video passthrough VDec: vo config request - 720 x 576 (preferred colorspace: Mpeg PES) Trying filter chain: expand lavc Could not find matching colorspace - retrying with -vf scale... Opening video filter: [scale] SwScale params: -1 x -1 (-1=no scaling) Trying filter chain: scale expand lavc 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: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2)) ========================================================================== 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 VDec: vo config request - 720 x 576 (preferred colorspace: Planar YV12) Trying filter chain: expand lavc VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is 1.33:1 - prescaling to correct movie aspect. VO Config (720x576->768x576,flags=0,'MPlayer',0x32315659) REQ: flags=0x401 req=0x0 videocodec: libavcodec (720x576 fourcc=69767664 [dvvi]) get_path('subfont.ttf') -> '/home/novakl/.mplayer/subfont.ttf' New_Face failed. Maybe the font path is wrong. Please supply the text font file (~/.mplayer/subfont.ttf). subtitle font: load_sub_face failed. *** [lavc] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytes *** [expand] Direct Rendering mp_image_t, 720x576x12bpp YUV planar, 622080 bytes *** [lavc] Allocating mp_image_t, 720x576x12bpp YUV planar, 622080 bytesms 18/45 D/B/S 0/1/0 *** [expand] Direct Rendering mp_image_t, 720x576x12bpp YUV planar, 622080 bytes Muxer frame buffer sending 2 frame(s) to the muxer. A-V:0.004 [0:0] A/Vms 18/33 D/B/S 0/2/0 VIDEO CODEC ID: 0 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... [dv @ 0x862fe48]Can't initialize DV format! Make sure that you supply exactly two streams: video: 25fps or 29.97fps, audio: 2ch/48Khz/PCM (50Mbps allows an optional second audio stream) Program received signal SIGFPE, Arithmetic exception. [Switching to Thread -1213974848 (LWP 28294)] 0x085f46f7 in __divdi3 () (gdb) Backtrace: (gdb) bt #0 0x085f46f7 in __divdi3 () #1 0x081c26b1 in av_frac_add (f=0x8b97a64, incr=<value optimized out>) at utils.c:2970 #2 0x081c39d6 in compute_pkt_fields2 (st=0x8b97a40, pkt=0xbfcdc760) at utils.c:2212 #3 0x081c71d6 in av_interleaved_write_frame (s=0x8b88db0, pkt=0xbfcdc760) at utils.c:2325 #4 0x080b3e3c in write_chunk (stream=0x0, len=96000, flags=16, dts=0, pts=0) at muxer_lavf.c:288 #5 0x080ab139 in muxer_write_chunk (s=0x8b97168, len=144000, flags=16, dts=-9.2233720368547758e+18, pts=-9.2233720368547758e+18) at muxer.c:127 #6 0x080a3874 in encode_frame (vf=0x8b92540, pic=<value optimized out>, pts=-9.2233720368547758e+18) at ve_lavc.c:802 #7 0x080a3cdc in put_image (vf=0x8b92540, mpi=0x0, pts=-9.2233720368547758e+18) at ve_lavc.c:759 #8 0x080b774b in filter_video (sh_video=0x8b4dd48, frame=0x8b51178, pts=-9.2233720368547758e+18) at dec_video.c:417 #9 0x0807f309 in main (argc=Cannot access memory at address 0x0 ) at mencoder.c:1312 (gdb) Disassemble: (gdb) disass $pc-32 $pc+32 Dump of assembler code from 0x85f46d7 to 0x85f4717: 0x085f46d7 <__divdi3+359>: lock ja 0x85f45f5 <__divdi3+133> 0x085f46de <__divdi3+366>: mov $0x1,%ecx 0x085f46e3 <__divdi3+371>: xor %eax,%eax 0x085f46e5 <__divdi3+373>: jmp 0x85f4600 <__divdi3+144> 0x085f46ea <__divdi3+378>: lea 0x0(%esi),%esi 0x085f46f0 <__divdi3+384>: mov $0x1,%eax 0x085f46f5 <__divdi3+389>: xor %edx,%edx 0x085f46f7 <__divdi3+391>: div %esi 0x085f46f9 <__divdi3+393>: mov %eax,%ecx 0x085f46fb <__divdi3+395>: jmp 0x85f45d8 <__divdi3+104> 0x085f4700 <__divdi3+400>: mov 0xfffffff0(%ebp),%eax 0x085f4703 <__divdi3+403>: movzbl 0xffffffe8(%ebp),%ecx 0x085f4707 <__divdi3+407>: shl %cl,%eax 0x085f4709 <__divdi3+409>: cmp %edi,%eax 0x085f470b <__divdi3+411>: jae 0x85f4691 <__divdi3+289> 0x085f470d <__divdi3+413>: mov 0xffffffc8(%ebp),%ecx 0x085f4710 <__divdi3+416>: xor %eax,%eax 0x085f4712 <__divdi3+418>: dec %ecx 0x085f4713 <__divdi3+419>: jmp 0x85f4600 <__divdi3+144> End of assembler dump. (gdb) Info all registers: (gdb) info all-registers eax 0x1 1 ecx 0x0 0 edx 0x0 0 ebx 0x80befc00 -2134967296 esp 0xbfcdc5f0 0xbfcdc5f0 ebp 0xbfcdc628 0xbfcdc628 esi 0x0 0 edi 0x0 0 eip 0x85f46f7 0x85f46f7 <__divdi3+391> eflags 0x210246 [ PF ZF IF RF ID ] cs 0x73 115 ss 0x7b 123 ds 0x7b 123 es 0x7b 123 fs 0x0 0 gs 0x33 51 st0 -nan(0x47004300470055) (raw 0xffff0047004300470055) st1 -nan(0x1b000b001b0000) (raw 0xffff001b000b001b0000) st2 -nan(0x2100210021002d) (raw 0xffff002100210021002d) st3 -nan(0xfff10001fff10010) (raw 0xfffffff10001fff10010) st4 -nan(0x5fff500050000) (raw 0xffff0005fff500050000) st5 -9223372036854775808 (raw 0xc03e8000000000000000) st6 0 (raw 0x00000000000000000000) ---Type <return> to continue, or q <return> to quit--- st7 0.5 (raw 0x3ffe8000000000000000) fctrl 0x37f 895 fstat 0x420 1056 ftag 0xffff 65535 fiseg 0x73 115 fioff 0x80b3e28 134954536 foseg 0x7b 123 fooff 0xbfcdc760 -1077033120 fop 0x784 1924 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} xmm3 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0}, v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, ---Type <return> to continue, or q <return> to quit--- 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 [ IM DM ZM OM UM PM ] mm0 {uint64 = 0x47004300470055, v2_int32 = {0x470055, 0x470043}, v4_int16 = {0x55, 0x47, 0x43, 0x47}, v8_int8 = {0x55, 0x0, 0x47, 0x0, 0x43, 0x0, 0x47, 0x0}} mm1 {uint64 = 0x1b000b001b0000, v2_int32 = {0x1b0000, 0x1b000b}, ---Type <return> to continue, or q <return> to quit--- v4_int16 = {0x0, 0x1b, 0xb, 0x1b}, v8_int8 = {0x0, 0x0, 0x1b, 0x0, 0xb, 0x0, 0x1b, 0x0}} mm2 {uint64 = 0x2100210021002d, v2_int32 = {0x21002d, 0x210021}, v4_int16 = {0x2d, 0x21, 0x21, 0x21}, v8_int8 = {0x2d, 0x0, 0x21, 0x0, 0x21, 0x0, 0x21, 0x0}} mm3 {uint64 = 0xfff10001fff10010, v2_int32 = {0xfff10010, 0xfff10001}, v4_int16 = {0x10, 0xfff1, 0x1, 0xfff1}, v8_int8 = {0x10, 0x0, 0xf1, 0xff, 0x1, 0x0, 0xf1, 0xff}} mm4 {uint64 = 0x5fff500050000, v2_int32 = {0x50000, 0x5fff5}, v4_int16 = {0x0, 0x5, 0xfff5, 0x5}, v8_int8 = {0x0, 0x0, 0x5, 0x0, 0xf5, 0xff, 0x5, 0x0}} mm5 {uint64 = 0x8000000000000000, v2_int32 = {0x0, 0x80000000}, v4_int16 = {0x0, 0x0, 0x0, 0x8000}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80}} 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 = 0x8000000000000000, v2_int32 = {0x0, 0x80000000}, v4_int16 = {0x0, 0x0, 0x0, 0x8000}, v8_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80}} (gdb) Hope this helps to locate the problem. Levente

3 15

Encoding filters
by Justin Randall 10 May '07

10 May '07

Hi everyone, I am trying to give up my dependency for the excellent AviSynth (because I want to stop using Windows) for video pre-processing. I need your help. My question to you experts out there is are their any pre-processing filters built into mencoder that are roughly equivalent to Donald Graft's Decomb package? Specifically the Telecide filter for inverse teleclining NTSC video sources 29.97 -> 23.97 FPS. I stumbled across the -vf detc option but I don't know if this is the same or not. The other avisynth filter that I am completely hooked on is RemoveGrain for cleaning up the picture. The same question... is there a mencoder option that does the equivalent of this filter? I have been using these settings for those who are familiar with AviSynth: crop(24,0,704,480) Telecide(guide=1).Decimate() RemoveGrain(mode=1) LanczosResize(640,480) I assume that it makes sense to crop first, then do the filter processing, then resize? I am essentially looking for the mencoder equivalent for these commands. I saw in the documentation that Lanczos scaling is invoked with -sws 9, but I am not sure about the noise filtering and the inverse telecline options. Any help would be appreciated! I've been reading through the documentation at http://www.mplayerhq.hu/DOCS/man/en/mplayer.1.html and there are so many options that I don't know where to begin for this. Thanks, Justin

5 7

Problems with output file size
by Drew Burchett 01 May '07

01 May '07

I am using mencoder to convert a group of AVIs into MPG format suitable for burning onto DVD. To accomplish this, I am using the following command line: mencoder -channels 6 -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd -vf scale=720:480,harddup -srate 48000 -af lavcresample=48000 -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:vstri ct=0:keyint=15:acodec=ac3:abitrate=384:aspect=4/3 -ofps 30000/1001 "$inputFile" -o "$outputFile" The problem is that the resulting file is huge. Two one-hour shows will completely fill a normal sized DVD. When I run the same file through AVIDemux, the output is much smaller with no noticeable drop in quality. However, I don't know what parameters AVIDemux is changing. Could anyone tell me what to adjust in the above command line to considerably reduce my output file size? Thanks, Drew Burchett United Systems & Software Ph: (270)527-3293 Fax: (270)527-3132 -- CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. -- This message has been scanned for viruses and dangerous content by MailScanner and is believed to be clean.

3 4

Codecs and fourcc supported out-of-the-box
by Nicolas George 30 Apr '07

30 Apr '07

Hi. When encoding a video that needs to be seen easily by unexperienced users, a lot of compatibility issues are resolved by just changing the fourcc. Therefore, I am wondering: Did someone ever bother to test and sum up on a web page the formats/codecs/fourcc that can be read out-of-the-box by various systems (windows, macos, etc.)? Regards, -- Nicolas George

3 2

Issue creating avi from png's on an intel mac
by Galen Papkov 28 Apr '07

28 Apr '07

I have a bunch of png images I want to put together to make an avi movie with. When I use the following line /Applications/Mencoder\ OS\ X.app/Contents/Resources/mencoder mf://*.png -mf fps=75:type=png -ovc lavc -oac copy -o mypngmovie.avi I see the following... Using GNU internationalization Original domain: messages Original dirname: /usr/local/share/locale Current domain: mplayer Current dirname: /usr/local/share/locale MEncoder dev-CVS-030602-20:55-3.1 (C) 2000-2003 Arpad Gereoffy (see DOCS) AltiVec found Reading /Users/gpapkov/.mplayer/codecs.conf: can't open '/Users/gpapkov/.mplayer/codecs.conf': No such file or directory Reading /usr/local/etc/mplayer/codecs.conf: can't open '/usr/local/etc/mplayer/codecs.conf': No such file or directory Using built-in default codecs.conf File not found: 'frameno.avi' Failed to open frameno.avi Reading config file /Users/gpapkov/.mplayer/mencoder: No such file or directory Unknown protocol 'mf' Unable to open URL: mf://*.png success: format: 16 data: 0x0 - 0x0 [demuxer] mf support. [mf] search expr: *.png [mf] number of files: 461 (1844) [V] filefmt:16 fourcc:0x474E504D size:0x0 fps:75.00 ftime:=0.0133 Opening video filter: [expand osd=1] Expand: -1 x -1, -1 ; -1 (-1=autodetect) osd: 1 ========================================================================== Requested video codec family [mpng] (vfm=mpng) not available (enable it at compilation) *** Try to upgrade /Users/gpapkov/.mplayer/codecs.conf from etc/codecs.conf *** If it still does not work, read DOCS/codecs.html! Cannot find codec matching selected -vo and video format 0x474E504D. ========================================================================== ...and then it exits. I am new to bash scripting and using mencoder, so if anyone can help me out, I'd really appreciate it. Thanks. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

2 1

Bonus Round: US OTA-HD scripts or flags?
by Robert Current 28 Apr '07

28 Apr '07

On 4/27/07, Robert Current <robert.current(a)gmail.com> wrote: > There are basically two down conversions I'm trying to do, convert the > captured mpeg2 1920x1080 to an mp4 1280x720 @30fps if it's actually an > HD broadcast. > > The second one is to take the mpeg2 1920x1080 and convert it down to a > NTSC SD like 720x480 @30fps. The above two would be great, but here's the third "bonus round" one I am also wondering about... I have another video capture card, a Hauppauge PVR-150, working great, capturing and deleting commercials.... thanks to this script: http://www.mythtv.org/wiki/index.php/Removing_Commercials The output is a 4:3 format 480x480 video file that midentify calls: NuppelVideo file format detected. ID_VIDEO_ID=0 ID_AUDIO_ID=0 ID_FILENAME=/myth/tv/1056_20070421090000.mpg ID_DEMUXER=nuv ID_VIDEO_FORMAT=DIVX ID_VIDEO_BITRATE=13200000 ID_VIDEO_WIDTH=480 ID_VIDEO_HEIGHT=480 ID_VIDEO_FPS=29.970 ID_VIDEO_ASPECT=0.0000 ID_AUDIO_FORMAT=85 ID_AUDIO_BITRATE=1024000 ID_AUDIO_RATE=48000 ID_AUDIO_NCH=2 ...ok... So, say that's a letter box movie, recorded on (USA) cable TV, and I'd be happy to transcode/convert it to a 16:9 file croping the upper and lower black parts out. How about that one? Of course, that's not going to save me much file space, and my first to questions are WAY higher in priority. But I'm guessing I'm not the only one who would like to do these three things... scripted maybe, a OTA-HD-to-SD, and OTA-HD-to-1280x720, and SD-480x480-to-720x408 scripts?

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US OTA-HD scripts or flags?
by Robert Current 28 Apr '07

28 Apr '07

I'm wondering if someone can suggest some scripts, or even flags, to convert/downsample files correctly. I have a MythTV system that records ATSC (American standard) Over the Air High Definition (OTA-HD), and the files are HUGE and to big to play on my computer. Recording is fine, playback is not working. There are basically two down conversions I'm trying to do, convert the captured mpeg2 1920x1080 to an mp4 1280x720 @30fps if it's actually an HD broadcast. The second one is to take the mpeg2 1920x1080 and convert it down to a NTSC SD like 720x480 @30fps. I've borrowed someone elses command line, and it only get's me as far as a smaller mpeg2, and I'm pretty sure I'm using some of the flags wrong... Anyway, here's I'm currently using: mencoder -vf \ kerndeint,softskip,scale=1280:720,harddup \ -ofps 30000/1001 -aspect 1.7777 -ovc lavc -lavcopts \ vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9600:\ vbitrate=4771000:keyint=18:turbo:trell:dc=10:autoaspect=1 \ -oac lavc -lavcopts acodec=ac3:abitrate=192 -of mpeg \ -o "$1" "$2" and mencoder -vf \ kerndeint,softskip,crop=960:720:160:0,scale=720:480,harddup \ -ofps 30000/1001 -aspect 1.7777 -ovc lavc -lavcopts \ vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9600:\ vbitrate=4771000:keyint=18:turbo:trell:dc=10:autoaspect=1 \ -oac lavc -lavcopts acodec=ac3:abitrate=192 -of mpeg \ -o "$1" "$2" Can someone point me to a better way to do this? Thanks, Rob C.

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question when encoding lossless progressive 60 fps to 30fps flash video
by Alejandro Vélez 26 Apr '07

26 Apr '07

I'm looking for how to compensate the loss of motion done by frameskipping when encoding a 60fps progressive lossless or high quality video to a 30fps flash video, is there a filter or a option for compensate the dropped frames?

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