August 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

Reencoding mjpeg from Pana TZ10/SZ7 offsets sound from video
by Marc MERLIN 29 Aug '11

29 Aug '11

I have my Panasonic TZ10 record videos as MJPEG since mplayer does not deal well with the H264 video that the camera creates. It can play its MJPEG MOVs just fine, but when I reencode them to something more efficient, the video and audio get out of sync. I tried encoding to h264, xvid, and divx and the result is the same: sound and video get offset. This has happened with multiple mencoder versoin up to MEncoder 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team I use this script (portion below) to encode. Are there other command line options I should give, or one I should change to get sound and video synchronized? Example: http://marc.merlins.org/tmp/vid/p1080047.mov (original) http://marc.merlins.org/tmp/vid/p1080047.mov_divx.avi (encoding #1) http://marc.merlins.org/tmp/vid/p1080047.mov_h264.avi (encoding #2) Thanks, Marc vf="-vf kerndeint" if [ "$codec" = xvid ]; then nice -19 mencoder -oac mp3lame -lameopts mode=3:abr:br=$abr $time $vf -ovc xvid -xvidencopts bitrate=$br $rot -o "$dest" "$src" else pass="$dest".pass for i in 1 2 do echo "DOING $codec PASS $i" echo "------------------" if [ "$codec" = h264 ]; then #vf=$vf,dsize=4/3,scale vf=$vf,scale nice -19 mencoder -passlogfile "$pass" -oac mp3lame -lameopts mode=3:abr:br=$abr $time $vf -ovc x264 -x264encopts bitrate=$br:turbo=1:pass=1:threads=0 $rot -o "$dest" "$src" || die "multipass failed on pass $i" elif [ "$codec" = divx ]; then nice -19 mencoder -passlogfile "$pass" -oac mp3lame -lameopts mode=3:abr:br=$abr $time $vf -ovc lavc -lavcopts vcodec=mpeg4:vhq:trell=yes:v4mv=yes:vbitrate=$br:vpass=$i -ffourcc DX50 $rot -o "$dest" "$src" || die "multipass failed on pass $i" fi done /bin/rm $pass *.pass.mbtree &>/dev/null fi -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/

3 8

Video - Incorrect frame rate
by Fatima Hussain 26 Aug '11

26 Aug '11

Hello, I did post earlier and apologize for posting again, but I would really apprecite a reply or some guidelines to solve my problem. I am trying to use Mencoder to merge jpeg images which I am capturing through Java Robot class. It is hard to know the exact frames per second rate for the image capture, but it seems to be about 1.5 to 2 frames per second on average. I later merge the silent video with audio. I was using these commands initially: a) $MENCODER_LOCATION "mf://*.jpg" -mf fps=2 -o $silentmovie -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800 This creates a silent movie without sound which i then merge with audio: b) $MENCODER_LOCATION $silentmovie -o $soundmovie -ovc copy -oac pcm -audiofile output.wav >/dev/null However, it seems that output frames per second rate in the silent video is much faster that 2 frames per second, due to which the video becomes shorter and the audio becomes out of sync. I also tried the following instead of a. $MENCODER_LOCATION "mf://*.jpg" -mf fps=2 -o $silentmovie -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800 harddup -ofps=2 But the frames per second rate still seem very fast. I would highly appreciate any help in this regard. Thank you. Best Regards, Fatima

2 1

No such thing as Turbo for -x264encopts?
by Bill Crockett 15 Aug '11

15 Aug '11

With -x264encopts, there is no mention of the "turbo" option for 2 pass encoding in the manual (man) pages under General Options. Yet, it is listed in the documentation pages to use with -x264encopts showing examples. Then again, the x264 command line encoder from VideoLan (which MEncoder uses) does not mention "turbo" in its extensive help listing. Was the turbo option ever part of the -x264encopts, or is this an error in the documentation?

1 0

Mencoder with x264 10 bit
by Made Wanarta 14 Aug '11

14 Aug '11

Hi, I'm new in here. Any one had tried this? Because when i tried it always asked to compiled it with 8 bit support Any suggestion will be very appreciate. Thank you

1 0

mencoder anti aliasing
by Ovidio Pirvu 14 Aug '11

14 Aug '11

Hi, I was curious if mencoder has some filter or some option of sorts for doing antialiasing on the subtitles. My problem is that in all my videos the subs are bleeding all over and are practically unreadable. Thanks.

1 0

how to decide the place of "harddup" video filter in the video filtler chain?
by littlebat 13 Aug '11

13 Aug '11

Hi, I am using mencoder to converting some videos. I read the man page about "harddup" video filter, it is said "Should be placed at or near the end of the filter chain unless you have a good reason to do otherwise.". But, I found it must be placed before the "aspect" filter or must be placed at the begin of the video filter chain sometimes. Anyone can tell me the guideline of how to decide the place of "harddup" video filter in the video filtler chain? There are two examples about can't place "harddup" at the end of the filter chain: 1. When the destination aspect is greater than orginal aspect, I need add black bar at the left and right side of the orginal video first, if I miss the "harddup" or place it at the end of the video filter chain, the destination video will has double width black bar at the right side and has no black bar at the left side. Here is my command line can get the right result: mencoder -noconfig all -ovc lavc -oac pcm \ -lavcopts vcodec=mpeg4:vbitrate=384 \ -vf expand=385:289,harddup,scale=320:240 \ -af volnorm -of lavf -ofps 15 -lavfopts format=mkv \ -o /tmp/tmp.wGbbJEoGEb.mkv /home/mdx/AVSEQ11.DAT -ss 0 -endpos 228 The original video is a vcd file, it has 352x288 resolution, you can download a 2M sample slice "test1.dat" at: http://www.learndiary.com/upload/test1.dat 2. The original video is still a 352x288 vcd file, if I use the same command line as above, I get the error report such as below: <qoute> 1 duplicate frame(s)! Last message repeated 122 timesTrem: 0min 0mb A-V:-0.019 [0:1411] Error while decoding frame! </quote> If I move the "harddup" to the begin of video filter, it works normally. The working video filter is "-vf harddup,expand=385:289,scale=320:240" You can download a 2M sample slice "test2.dat" at: http://www.learndiary.com/upload/test2.dat Thanks. littlebat

1 0

Frames per Second
by Fatima Hussain 08 Aug '11

08 Aug '11

Hello, I am trying to use Mencoder to merge jpeg images which I am capturing through Java Robot class. I do not know the exact frames per second rate for the image capture, but it seems to be about 1.5 to 2 frames per second on average. I later merge the silent video with audio. I was using these commands initially: a) $MENCODER_LOCATION "mf://*.jpg" -mf fps=2 -o $silentmovie -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800 This creates a silent movie without sound which i then merge with audio: b) $MENCODER_LOCATION $silentmovie -o $soundmovie -ovc copy -oac pcm -audiofile output.wav >/dev/null However, it seems that output frames per second rate in the silent video is much faster that 2 frames per second, due to which the video becomes shorter and the audio becomes out of sync. I also tried the following instead of a. $MENCODER_LOCATION "mf://*.jpg" -mf fps=2 -o $silentmovie -ovc lavc -lavcopts vcodec=msmpeg4v2:vbitrate=800 harddup -ofps=2 But the frames per second rate still seem very fast. I would highly appreciate any help in this regard. Thank you. Best Regards, Fatima

1 0

Re: [MEncoder-users] MEncoder-users Digest, Vol 84, Issue 3
by SilentShade 08 Aug '11

08 Aug '11

Thanks for reply. I haven't tried this yet, but i found that specifying -noskip option helps in my case. However a/v sync issue still exist in some cases, but it's minor and can be ignored.. I only add it when the source is variable frame rate. I'll try -demuxer option and post back if it helps. 08.08.2011, в 14:00, mencoder-users-request(a)mplayerhq.hu написал(а): > Send MEncoder-users mailing list submissions to > mencoder-users(a)mplayerhq.hu > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users > or, via email, send a message with subject or body 'help' to > mencoder-users-request(a)mplayerhq.hu > > You can reach the person managing the list at > mencoder-users-owner(a)mplayerhq.hu > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of MEncoder-users digest..." > Today's Topics: > > 1. Re: transcoding from variable framerate MP4 to avi, a/v sync > problem - video stream much shorter (L. Lee) > > От: "L. Lee" <llee040(a)sbcglobal.net> > Дата: 8 августа 2011 г. 8:00:44 Московское летнее время > Кому: MEncoder usage discussions <mencoder-users(a)mplayerhq.hu> > Тема: Ответ: [MEncoder-users] transcoding from variable framerate MP4 to avi, a/v sync problem - video stream much shorter > Ответ-Кому: MEncoder usage discussions <mencoder-users(a)mplayerhq.hu> > > > On 7/30/11 3:01 PM, "SilentShade" <lifeemulation(a)gmail.com> wrote: > >> Hello everybody. >> I'm trying make an all-in-one transcoder for any types of video, for web >> streaming. The output is AVC/AAC in MP4 container. For that i use the >> following techique: >> 1. Encode input to avc/aac and remux it to avi container. (mencoder) >> 2. Demux audio and video steams into separate files >> 3. Mux to mp4 with gpac MP4Box >> >> I ran into problem with an input mp4 file having variable framerate. >> The sample command for stage 1 is: >> mencoder -af volnorm=2 -oac faac -faacopts br=98:mpeg=4:object=2 -channels 2 >> -srate 44100 -ovc x264 -x264encopts >> bitrate=500:subq=5:frameref=6:cabac:threads=auto:bframes=3:b_pyramid=normal:we >> ight_b -ofps 30000/1001 -vf pp=hb/vb/lb,dsize=960:720:0,scale=-8:-8,harddup >> infile.mp4 -o tmp.avi >> > > Have you tried specifying a demuxer (-demuxer lavf, for example)? > > > > > > _______________________________________________ > MEncoder-users mailing list > MEncoder-users(a)mplayerhq.hu > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users

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