April 2011 - MEncoder-users - lists.mplayerhq.hu

27 Apr '13

Hi, I wanted to combine 12 flash video files (from youtube) into a single avi file. So I did cat at Zachar*.flv > Zach_all.flv $ mencoder Zach_all.flv -o Zach_all.avi -forceidx -ovc copy -oac pcm The output shows skipping frames, and missing aspect information, as you see below. What do I need to do to fix that, so thet when I am transcoding into .avi, I do not get these skips and missing aspect info? MEncoder SVN-r31628-4.4.5 (C) 2000-2010 MPlayer Team success: format: 0 data: 0x0 - 0x8378f0a libavformat file format detected. [flv @ 0x92d07a0] Estimating duration from bitrate, this may be inaccurate [lavf] stream 0: video (h264), -vid 0 [lavf] stream 1: audio (aac), -aid 0 VIDEO: [H264] 480x270 0bpp 29.917 fps 119.2 kbps (14.5 kbyte/s) [V] filefmt:44 fourcc:0x34363248 size:480x270 fps:29.917 ftime:=0.0334 ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) AUDIO: 44100 Hz, 2 ch, s16le, 49.5 kbit/3.51% (ratio: 6184->176400) Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) ========================================================================== videocodec: framecopy (480x270 0bpp fourcc=34363248) Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Writing header... ODML: Aspect information not (yet?) available or unspecified, not writing vprp header. Pos: 0.7s 21f ( 0%) 14.38fps Trem: 0min 0mb A-V:0.067 [0:1411] Skipping frame! Pos: 1.1s 33f ( 0%) 18.45fps Trem: 0min 0mb A-V:0.068 [150:1411] Skipping frame! Pos: 6.0s 182f ( 0%) 38.81fps Trem: 65min 1014mb A-V:0.067 [148:1411] Skipping frame! Pos: 23.5s 706f ( 0%) 43.90fps Trem: 70min 1142mb A-V:0.067 [106:1411] Skipping frame! Pos: 38.4s 1153f ( 0%) 44.83fps Trem: 68min 1147mb A-V:0.067 [113:1411] Skipping frame! Pos: 57.4s 1723f ( 0%) 44.84fps Trem: 66min 1117mb A-V:0.068 [124:1411] Skipping frame! Pos: 76.9s 2306f ( 1%) 44.36fps Trem: 65min 1089mb A-V:0.067 [128:1411] Skipping frame! Pos: 98.4s 2950f ( 1%) 44.17fps Trem: 65min 1092mb A-V:0.067 [126:1411] Skipping frame! Pos: 117.5s 3522f ( 1%) 43.68fps Trem: 65min 1086mb A-V:0.067 [128:1411] Skipping frame! Pos: 132.5s 3972f ( 2%) 43.76fps Trem: 66min 1092mb A-V:0.067 [127:1411] Skipping frame! Pos: 153.7s 4608f ( 2%) 44.14fps Trem: 66min 1104mb A-V:0.067 [126:1411] Skipping frame! Pos: 173.1s 5190f ( 2%) 43.84fps Trem: 68min 1133mb A-V:0.067 [120:1411] Skipping frame! Pos: 190.3s 5705f ( 3%) 44.08fps Trem: 67min 1122mb A-V:0.067 [121:1411] Skipping frame! Pos: 211.7s 6347f ( 3%) 43.80fps Trem: 66min 1114mb A-V:0.068 [124:1411] Skipping frame! Pos: 228.7s 6856f ( 3%) 43.84fps Trem: 66min 1113mb A-V:0.067 [124:1411] Skipping frame! Pos: 248.1s 7436f ( 4%) 44.06fps Trem: 65min 1110mb A-V:0.067 [125:1411] Skipping frame! Pos: 265.3s 7954f ( 4%) 43.82fps Trem: 66min 1120mb A-V:0.067 [123:1411] Skipping frame!

5 28

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

Can't compile mplayer - no libavcodec
by larrystotler＠netscape.net 10 May '11

10 May '11

I'm trying to compile the newest mplayer from svn and I keep getting the foloowing error: av_opts.c:26:28: error: libavcodec/opt.h: No such file or directory av_opts.c: In function 'parse_avopts': av_opts.c:41: warning: implicit declaration of function 'av_set_string3' make: *** [av_opts.o] Error 1 My System: Linux 2.6.25.20-0.7-default SMP X86_64? openSUSE v11.0 gcc v4.3-39.1 I don't see it being the older version of gcc because it looks like the files are just missing. running ./configure pulled in ffmpeg with no problems. Any suggestions? Thanx

5 7

Problem with ac3 encoding: 1 duplicate frame(s)!
by Bernd Butscheidt 30 Apr '11

30 Apr '11

I am doing this: mencoder -noskip -ovc x264 -speed 24000/25000 -ofps 24 -vf hqdn3d,softskip,harddup -x264encopts subq=1:frameref=3:me=hex:bframes=3:b_adapt:threads=auto:8x8dct:crf=12:b_pyramid=normal:weightp=2:keyint=250:weight_b:vbv_maxrate=40000:vbv_bufsize=30000:level_idc=41 -channels 6 -srate 48000 -oac lavc -af lavcresample=48000 -lavcopts acodec=ac3:abitrate=448 -alang en,de -slang en,de -vobsubout Lucky#Number#Slevin#3 dvd://3 -dvd-device /dev/sr0 -of lavf -lavfopts format=matroska -o Lucky#Number#Slevin#3€reenc.mkv -aid 129 Using MEncoder SVN-r33074-4.5.2 I get endlessly "1 duplicate frame(s)!"-messages, about every 0.5s. Actually I stopped at about Position 30 seconds. If I use "-lameopts cbr:br=224:aq=0:mode=1" instead of ac3-Audio or(!) switch back to MEncoder SVN-r32719-4.5.2 using the same source and calling the exactly the same options as above (including ac3-Audio!!!) I get 3 "Skipping frame!"-messages until position 2.9seconds (using the older version) or 4"Skipping frame!"-messages until position 2.3 seconds using the new version but sticking to mp3-sound. The encoding continues without problems (tested so far until 3% of the whole movie). Although I don't know why mencoder skips frames at the beginning, this is the behaviour I am used too and which leads to very satisfying results. So do newer versions of mencoder break ac3-encoding or does my simple mind misses something again .... Kind regards Bernd B.

4 8

multiple parameter doesn't add up
by Gabri Nurtinaz Shally 26 Apr '11

26 Apr '11

does anyone notice that now multiple -x264encopts doesn't add up? instead it will use the last one. for example: mencoder -oac mp3lame -ovc x264 -x264encopts pass=1:threads=3 video.mp4 -o video.avi -x264encopts bitrate=800 the video won't be encoded using multipass mode

5 4

Server move, possible outages
by Reimar Döffinger 16 Apr '11

16 Apr '11

Hello everyone, (sorry for this massive SPAM) mplayerhq is moving to a different server and this mailing list is affected. This will happen on monday, in parts possibly earlier. We intend of course to make this move completely seamless but it'll probably a bit more messy than that. Therefore we wanted to tell you about it, what the current status is, what might go wrong and you can do if this is an issue for you. The rest is a bit technical, if you do not understand anything just ignore it :-). If there's some service you depend on that is not mentioned consider asking us. 1) DNS: we switched to DNS on the new server, but the change hasn't propagated yet. The server will be the same as the ffmpeg.org one, so if necessary you can e.g. manually add a line like 192.190.173.45 www1.mplayerhq.hu www.mplayerhq.hu mplayerhq.hu svn.mplayerhq.hu mplayerhq.eu to /etc/hosts. IRC on freenode.net, #mplayer should work as emergency communication channel. 2) Homepage: The mplayerhq.hu homepage is already up and running on the server, some download links are not working currently though 3) Mailing lists: basic setup done, data like archives and subscriber list still missing. In the worst case you would have to subscribe again - we do _not_ expect that to happen. 4) Repositories: We have full backups of the repositories up and running (minus latest commits) but some details like who has write access and commit hooks are missing. It might be better not to use them for a few days. 5) FTP: All data is backed-up (in several places) but not all will be available from the start. In particular upload/incoming and samples will be missing for some time due to high disk-space requirements of these. Kind regards, Reimar Döffinger

1 0

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

Normalizing with MENcoder
by Charles Taylor 11 Apr '11

11 Apr '11

Morning all, I am looking to normalize all my video's using MENcoder, how do I go about this? Any tips or hints -- Tong Shan Hui -----------------

2 1

Tron Legacy switches aspect/crop?
by larrystotler＠netscape.net 11 Apr '11

11 Apr '11

I am looking a theron Legacy DVD. It seems that of the movie has the aspect: 720:368:0:54 while some of the action scenes are: 720:480:0:0 If I play with crop=720:368 it shows all the scene, so it would appear that it's smooshing the video in the areas where it's 720:480. Is this something that they are doing more often? I've only recently started using crop so I'd hate to have screwed up some of my encodes. Thanx

2 2

mencoder on Ubuntu 10.10
by Corenflos, Steven 08 Apr '11

08 Apr '11

I have been using mencoder to record audio and video from my Logitech Quickcam Pro 9000. I've been using the following wrapper script under 10.04: ----- #!/bin/bash outFile=$(date +%Y-%m-%d) mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:forceaudio:adevice=/dev/audio1 -ovc lav ----- However I updated to 10.10 the other day and now this script no longer works. When I run it I get the following output from mencoder: ----- user@host:~$ mencoder tv:// -tv driver=v4l2:width=800:height=600:device=/dev/video0:forceaudio:adevice=/dev/audio1 -ovc lavc -oac mp3lame -lameopts cbr:br=64:mode=3 -o ~/projects/webcam/test.avi MEncoder 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team success: format: 9 data: 0x0 - 0x0 TV file format detected. Selected driver: v4l2 name: Video 4 Linux 2 input author: Martin Olschewski <olschewski(a)zpr.uni-koeln.de> comment: first try, more to come v4l2: your device driver does not support VIDIOC_G_STD ioctl, VIDIOC_G_PARM was used instead. Selected device: UVC Camera (046d:0990) Capabilites: video capture streaming supported norms: inputs: 0 = Camera 1; Current input: 0 Current format: YUYV v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument v4l2: ioctl set format failed: Invalid argument tv.c: norm_from_string(pal): Bogus norm parameter, setting default. v4l2: ioctl enum norm failed: Invalid argument Error: Cannot set norm! Selected input hasn't got a tuner! Unable to open '/dev/audio1': No such file or directory Unable to open '/dev/audio1': No such file or directory Unable to open '/dev/audio1': No such file or directory v4l2: ioctl set mute failed: Invalid argument v4l2: 0 frames successfully processed, 0 frames dropped. ============ Sorry, this file format is not recognized/supported ============= === If this file is an AVI, ASF or MPEG stream, please contact the author! === Cannot open demuxer. Exiting... ----- Can anyone please help me figure out what's going on? The video and audio work in other applications, but for some reason mencoder isn't using them. I don't like Cheese (what seems to be the recommended alternative) because it seems like I can't get equally high framerates at good resolution, and besides I want to be able to run this from the command line. Thanks for any help!

2 1