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

subtitles disappear with mencoder
by Stephen DiVerdi 16 Nov '05

16 Nov '05

hello, i've just joined the list because for the first time i'm having a problem with mencoder that i can't figure out for the life of me. i've been using mencoder to rip dvds for a couple of years now, but this is the first time i've really been stuck with it. the problem is i have a dvd (In The Mood For Love, if you're interested) with korean audio and english subtitles. when i view it with mplayer, specifying '-sid 0' i get english subtitles, as expected. however, when i use mencoder to rip it, again with '-sid 0', the subtitles don't appear (yes, i'm trying to burn the subtitles into the video stream). i've tried all manner of options specifying subtitle position, font selection, etc. but can't get them to appear in the ripped video. for a sanity check, i popped in another dvd (The Matrix) and the subtitles appear just fine in the video file created by mencoder. this is with mplayer / mencoder 1.0pre7try2-3.4.3 on fedora core 3. i've attached verbose output from mplayer and mencoder if those can shed any light on the subject, though i haven't been able to find any significant subtitle-related differences in them. in both cases, i let it run until a point was reached in which subtitles were / should have been present. any suggestions are appreciated! thank you! (on a side note, getting on to this list was fairly difficult - the mailing list webpages seem to be inaccessible. http://mplayerhq.hu/mailman/listinfo/mencoder-users times out every time i try to access it.) -steve diverdi -sdiverdi(a)cs.ucsb.edu

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Audio preload and density
by Jean Hoderd 16 Nov '05

16 Nov '05

Dear mencoders, I have been playing around with a hardware DivX player (the KiSS DP1000), feeding it with all sorts of AVIs created with mencoder. I have learned a number of interesting things, but there is one aspect which still escapes my understanding: the audio-preload and audio-density settings. Particularly with high-bitrate AC3 streams, KiSS seems to be very sensitive to the above settings. There is one thread in the KiSS forum (google for "kiss ac3 interleave") which says the problem is related with buffer sizes, but their advise seems a bit paradoxical to me: I would expect that the higher the bitrate, the more frequently one would have to place audio chunks in the stream in order to reduce the buffer requirements. Or am I misunderstanding the meaning of interleaving and preload? Also, they advise on using multiples of 32ms, but I don't see how this could be achieved in mencoder -- unless one were to use mad fractional parameters to audio-density, which are not allowed anyway. To summarise: how exactly does audio-preload and audi-interleave affect the output stream, and what are the reasonable parameters for hardware-player-friendly AVI files (as a function of the audio bitrate)? Also, do the preload and density parameters affect in any way the audio synchronisation? Thanks for your help! Regards, Jean __________________________________ Yahoo! FareChase: Search multiple travel sites in one click. http://farechase.yahoo.com

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pcm file problem
by José Antonio Castelbón Fernández 16 Nov '05

16 Nov '05

Hi everyone: I'm using mplayer for windows, and i try to add a wav header to a pcm stream.I need to use absolute references ( c:\data\mywav.wav ) but mplayer exits with a parse parameters error: for example: C:\cpsa\exe>..\Encoders\mplayer\mplayer c:\cpsa\datos\pruebaPPAL1_25.raw -rawaudio on:channels=1:samplesize=2:rate=8000 -ao pcm:file=c:\cpsa\datos\pruebaPPAL1_25.wav MPlayer dev-CVS-050626-17:02-3.4.2 (C) 2000-2005 MPlayer Team CPU: Intel Pentium 4/Xeon/Celeron Foster (Family: 8, Stepping: 5) Detected cache-line size is 64 bytes CPUflags: MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 0 SSE2: 0 Compiled with runtime CPU detection - WARNING - this is not optimal! To get best performance, recompile MPlayer with --disable-runtime-cpudetection. Cannot load font: c:/windows/fonts/arial.ttf Playing c:\cpsa\datos\pruebaPPAL1_25.raw. ========================================================================== Opening audio decoder: [pcm] Uncompressed PCM audio decoder AUDIO: 8000 Hz, 1 ch, s16le, 128.0 kbit/100.00% (ratio: 16000->16000) Selected audio codec: [pcm] afm:pcm (Uncompressed PCM) ========================================================================== Building audio filter chain for 8000Hz/1ch/s16le -> 0Hz/0ch/??... Could not parse arguments at the position indicated below: file=c:\cpsa\datos\pruebaPPAL1_25.wav ^ Is there another way to do this.. ?? Cheers

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TV recording with mencoder
by Artur Iwaniuk 15 Nov '05

15 Nov '05

hi all i'v faced continiusly recording of tv station problem and use mencoder for that purpose. i wanted to record one hour of program in single file. now, mencoder is running in never ending loop, and in specyfy time, mencoder ends coding, and runs once again. but this leeds to missing of 4-7 seconds of recorded channel. i'v think to use two mencoders connected by pipe. first one, reads data from video device, and in raw form sends into pipe. second mencoder reads pipe and endcocde data to avi format. but raw format only supports video, not audio. if i use copy voc, second mencoder cannot use data from pipe. now i am modifying source of mencoder, to, as he ends recording, jump into point where muxer_f is opened to, without closing video device, start writing data into next file. basicly, it works, howerer after each loop, mencoder consumes more and more memory. after five hours memory ends, and mencoder process is terminated by system. have anyone could give me suggestion, how to do not miss those seconds ? krioni

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problem encoding some files to xvid and mp3 audio (lame)
by Francisco 14 Nov '05

14 Nov '05

Hi list, I'm trying to encode some files to xvid and mp3 audio using lame, so far so good, the problem es that some of the files are missing the last second or so of audio, I don't know the exact time, but it's obvious that the audio finishes abruptly. The strange thing is that most files are the same kind of source codec and all are being encoded to the same format, but only some of them have this problem. The commands I'm using are the following: mencoder -ovc xvid -xvidencopts bitrate=2000:me_quality=6:quant_type=mpeg:gmc:trellis:chroma_opt:vhq=4:pass=1 -oac mp3lame -lameopts mode=0:cbr:br=64 <inputfile> -o /dev/null mencoder -ovc xvid -xvidencopts bitrate=2000:me_quality=6:quant_type=mpeg:gmc:trellis:chroma_opt:vhq=4:pass=2 -oac mp3lame -lameopts mode=0:cbr:br=64 <inputfile> -o <outputfile> if I change "mp3lame -lameopts mode=0:cbr:br=64" for "pcm" the audio finishes ok, so I guess is something to do with lame. lame: 3.96.1 mplayer: 1.0_pre7-r1 xvid: 1.0.3 That's all, any way to debug this problem?, since I have no idea how to do it really. Thank you Francisco

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AVI overhead
by Jean Hoderd 12 Nov '05

12 Nov '05

Hi, My encodings with XviD are constantly running above the target size, and I suspect it might be the avi overhead. I am using these formulas to compute the video bitrate: (rates are in kbps, duration in seconds, sizes in bytes) audiosize = 1000 * audiorate * duration / 8 videosize = totalsize - audiosize videorate = 8 * videosize / duration / 1000 Now, this set of formulas does not into account the avi overhead. (The videosize should be totalsize minus audiosize *minus* overhead). My question is: how does one compute it? (At least an estimation) Thanks for your help! Jean __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

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Running MEncoder from a PHP script
by Trent E DiRenna 11 Nov '05

11 Nov '05

I'm currently working on a project to splice together a number of JPEG images into an AVI movie file, using MEncoder; this is to be run from a PHP web script. The command line I'm using for this is as follows: /usr/local/bin/mencoder mf://*.jpg -quiet -mf fps=5:type=jpg -ovc lavc -lavcopts vcodec=wmv2 -o phpwmv.avi When I run this from the command line (in the directory where the Jpegs are located), it works fine and creates the AVI file. However, when I use a PHP shell_exec() to run this (after first using chdir() to change working directories), no output file is created, and I get the following output text (also with system() and exec() ): MEncoder 1.0pre7try2-3.4.4 (C) 2000-2005 MPlayer Team CPU: Intel Pentium III Katmai/Pentium III Xeon Tanner (Family: 6, Stepping: 3) Detected cache-line size is 32 bytes CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 0 Compiled for x86 CPU with extensions: MMX MMX2 SSE success: format: 16 data: 0x0 - 0x0 [demuxer] mf support. [mf] search expr: *.jpg [mf] number of files: 263 (1052) VIDEO: [IJPG] 0x0 24bpp 5.000 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:16 fourcc:0x47504A49 size:0x0 fps: 5.00 ftime:=0.2000 Exiting... When I run from the command line, I get the actual running encoding line instead of "Exiting". It looks like it's finding the files here, but then just shutting down. Does MEncoder require a special setting to run from a web script, or is there just something I'm missing? Thanks in advance for your answers. Trent Di Renna

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lavc options
by José Antonio Castelbón Fernández 11 Nov '05

11 Nov '05

Hi to everyone I'm trying to develope a mobile video stream application, and i'm using mencoder to encode the videos. The video format is mpeg4, 6-8fps, qcif and 40kbs maximun bitrate. My mencoder options are: -vf scale=176:144 -ofps 8 -nosound -ovc lavc -of rawvideo -lavcopts vcodec=mpeg4:vbitrate=40:mbd=1:vrc_eq=1:vstrict=1:trell:dia=-3:cbp:qns=1:v4mv:keyint=250:turbo:vpass=1 -vf scale=176:144 -ofps 8 -nosound -ovc lavc -of rawvideo -lavcopts vcodec=mpeg4:vbitrate=40:mbd=1:vrc_eq=1:vstrict=1:trell:dia=-3:cbp:qns=1:v4mv:keyint=250:turbo:vpass=2 With this configuration the final video has a lot of ghosting, i try to encode it with less keyint but the motion gets worse. I'm not an expert and i guess if you could help me to find the appropiate mencoder options to see a decent and well motioned video on the mobile with the streaming. Cheers, Jose Antonio

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idx option
by Tshepang Lekhonkhobe 10 Nov '05

10 Nov '05

Hello, How do I encode with the indexing option (so I could ffwd in my video)? The man page of my pre7 release of mplayer does not clearly explain this or so does the mplayer-doc. The option works with mplayer but I want to encode this into the video. Thanks...

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mpeg2 split
by Németh Péter 10 Nov '05

10 Nov '05

Hi everybody! i want to split a 1,7 gb mpeg2 file to 2 parts how can i make it? i try: C:\Program Files\mplayer>mencoder "E:\movie\input.mpg" -o "out.mpg" -ss 1mb -endpos 70mb -oac copy -ovc copy it make a 70 mb movie, but i cannot playback it why? the ovc set copy... pls help, thx

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