February 2014 - MEncoder-users - lists.mplayerhq.hu

change frame rate
by Shiyuan 28 Feb '14

28 Feb '14

Hi, I have an avi video with 5000 frames. The original frame rate is 15 frames/per second, and it takes 300 seconds to play the whole video. I want the video to play faster so that it takes less time to complete, so I change the frame rate using the following command: mencoder in.avi -o out.avi -ofps 100 -ovc copy However, out.avi still take around 300 seconds to complete, even though out.avi does have fps of 100fps according to the info displayed by mplayer. What command options should I use if I want the output video to be complete in 50 sec? Thanks. Shiyuan

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Correcting a mis-captured video
by Tim Mann 18 Feb '14

18 Feb '14

Hi, folks. I am trying to solve a problem for a friend, and trying to figure out whether I can use mplayer/mencoder to do it -- or use something else available on Linux to do it, for that matter. My friend has some old home movies that were recorded at 18 fps. She took them to a service that captures movies and records them to DVD. The service played the movies at 24 fps while capturing them, so they came out with the motion too fast and the audio too high-pitched. If I play the .VOB files from the DVD with the following command, they play with apparently the right speed and audio pitch: mplayer -af scaletempo=speed=both -speed 0.75 VTS_01_1.VOB I am now trying to figure out if there is a way to re-encode to DVD at the corrected speed. So far I am not guessing the right command line to mencoder -- if there is one. This is the closest I've gotten so far, based on rather blindly gluing together the above mplayer options with suggested mencoder options for producing DVD-compliant mpgs from http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-vcd-dvd.html: mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf \ -vf scale=720:480,harddup -srate 48000 -af lavcresample=48000 \ -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:\ keyint=18:vstrict=0:acodec=ac3:abitrate=192:aspect=4/3 -ofps 30000/1001 \ -o /tmp/test.mpg VTS_01_1.VOB -af scaletempo=speed=both -speed 0.75 This produces an .mpg file where the audio plays correctly, but the video is still too fast. There are also a ton of messages about duplicate frames and invalid timestamps. (See below.) I did some reading in the documentation and tried a few more things after that, but nothing worked. Any suggestions? Things I already tried included adding the option -fps 40000/1001 and adding filmdint=io=3:4 in the -vf chain. (BTW, as the next step after I get this somewhat working: I realize that the file I already have was converted by the service from 24 to 30 fps, so to get the best looking results it might be necessary to deinterlace it to get the original frames back, and then do an 18 -> 30 conversion. Maybe pulldown followed by filmdint=io=3:5 would be the right idea...??) *** Output from the above command: MEncoder svn r34540 (Ubuntu), built with gcc-4.7 (C) 2000-2012 MPlayer Team success: format: 0 data: 0x0 - 0x3e83d800 libavformat version 53.21.1 (external) Mismatching header version 53.19.0 MPEG-PS file format detected. VIDEO: MPEG2 720x480 (aspect 2) 29.970 fps 8500.0 kbps (1062.5 kbyte/s) [V] filefmt:2 fourcc:0x10000002 size:720x480 fps:29.970 ftime:=0.0334 ========================================================================== Requested audio codec family [mpg123] (afm=mpg123) not available. Enable it at compilation. Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 53.35.0 (external) Mismatching header version 53.32.2 AUDIO: 48000 Hz, 2 ch, floatle, 224.0 kbit/7.29% (ratio: 28000->384000) Selected audio codec: [ffmp2float] afm: ffmpeg (FFmpeg MPEG layer-1 and layer-2 audio) ========================================================================== PACKET SIZE: 2048 bytes, deltascr: 43885 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: [scale w=720 h=480] ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffmpeg2] vfm: ffmpeg (FFmpeg MPEG-2) ========================================================================== [ac3 @ 0x7f4c7f47a300]channel_layout not specified [ac3 @ 0x7f4c7f47a300]No channel layout specified. The encoder will guess the layout, but it might be incorrect. Limiting audio preload to 0.4s. Increasing audio density to 4. Unsupported PixelFormat 61 Unsupported PixelFormat 53 Unsupported PixelFormat 81 Movie-Aspect is 1.33:1 - prescaling to correct movie aspect. [swscaler @ 0x7f4c7ff56640]using unscaled yuv420p -> yuv420p special converter videocodec: libavcodec (720x480 fourcc=3267706d [mpg2]) Pos: 0.0s 1f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0] Writing header... INITV: 0.200, 0.167, fps: 29.970 1 duplicate frame(s)! [mpeg2video @ 0x7f4c7f47a300]Error, Invalid timestamp=1, last=1 Pos: 0.0s 2f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.003 [0:0] 1 duplicate frame(s)! [mpeg2video @ 0x7f4c7f47a300]Error, Invalid timestamp=3, last=4 Pos: 0.3s 5f ( 0%) 0.00fps Trem: 0min 0mb A-V:0.010 [0:0] ...

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Opening Local SDP files with mencoder
by Ben Barker 14 Feb '14

14 Feb '14

I have an installed version of mencoder where I can open an SDP file using: mencoder sdp://test.sdp -fps 25 -ovc lavc -o test.mp4 The version installed is: Encoder SVN-r36450-snapshot-4.1.2 (C) 2000-2013 I have just tried the same with the latest version from the repositories - MEncoder SVN-r36784-4.1.2 - which I have built from source with no obvious problems. This however gives me: No stream found to handle url sdp://test.sdp In response to the same command above Has the ability to join a stream via a lcoal SDP file been lost in this newer release, or just changed....?

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trac.ffmpeg.org / trac.mplayerhq.hu Security Breach
by Alexander Strasser 13 Feb '14

13 Feb '14

Some people might not follow mplayerhq.hu closely, the following news were posted originally at https://mplayerhq.hu/design7/news.html#trac_sec The server on which FFmpeg and MPlayer Trac issue trackers were installed was compromised. The affected server was taken offline and has been replaced and all software reinstalled. MPlayer SVN, releases, web and mailinglists are on other servers and were not affected. We believe that the original compromise happened to a server, unrelated to FFmpeg and MPlayer, several months ago. That server was used as a source to clone the VM that we recently moved Trac to. It is not known if anyone used the backdoor that was found. We recommend all users to change their passwords. Especially users who use a password on Trac that they also use elsewhere, should change that password at least elsewhere. Alexander

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'-nosound' breaks DVD parsing in MPlayer and Mencoder
by Selur 11 Feb '14

11 Feb '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Seems like I ran into a similar problem as https://trac.mplayerhq.hu/ticket/2172 using MPlayer SVN-r36775-4.8.2 and MEncoder SVN-r36775-4.8.2 no matter if I call: mencoder -ovc raw -noskip -forcedsubsonly -nosub -nosound -mc 0 - -lavdopts threads=8 -of rawvideo -o NUL -dvd-device "F:\TestClips&Co\DVDs\ElephantsDream" dvd://1 or mplayer -lavdopts threads=1 -aspect 1.77778:1 -mc 0 -nosound - -nomouseinput -nokeepaspect -monitorpixelaspect 1 dvd://1 -dvd-device "F:\TestClips&Co\DVDs\ElephantsDream\VIDEO_TS" -forcedsubsonly -nosub - -noautosub -fps 25 -vo direct3d I get: MPEG: Missing video stream!? Contact the author, it may be a bug - ------------------------------------------------------------------------- the mencoder call returns: {{{ MEncoder SVN-r36775-4.8.2 (C) 2000-2014 MPlayer Team libdvdread: Could not open F:\TestClips&Co\DVDs\ElephantsDream with libdvdcss. libdvdread: Can't open F:\TestClips&Co\DVDs\ElephantsDream for reading libdvdread: Device F:\TestClips&Co\DVDs\ElephantsDream inaccessible, CSS authent ication not available. There are 1 titles on this DVD. There are 1 angles in this DVD title. audio stream: 0 format: ac3 (5.1) language: en aid: 128. number of audio channels on disk: 1. subtitle ( sid ): 0 language: en subtitle ( sid ): 0 language: en number of subtitles on disk: 2 success: format: 2 data: 0x0 - 0x20804800 MPEG: Missing video stream!? Contact the author, it may be a bug ============ 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. - ------------------------------------------------------------------------- and the mplayer call returns: - ------------------------------------------------------------------------- MPlayer SVN-r36775-4.8.2 (C) 2000-2014 MPlayer Team Playing dvd://1. libdvdread: Could not open F:\TestClips&Co\DVDs\ElephantsDream\VIDEO_TS with lib dvdcss. libdvdread: Can't open F:\TestClips&Co\DVDs\ElephantsDream\VIDEO_TS for reading libdvdread: Device F:\TestClips&Co\DVDs\ElephantsDream\VIDEO_TS inaccessible, CS S authentication not available. There are 1 titles on this DVD. There are 1 angles in this DVD title. audio stream: 0 format: ac3 (5.1) language: en aid: 128. number of audio channels on disk: 1. subtitle ( sid ): 0 language: en subtitle ( sid ): 0 language: en number of subtitles on disk: 2 MPEG: Missing video stream!? Contact the author, it may be a bug Exiting... (End of file) - ------------------------------------------------------------------------- mplayer&mencoder were build using: https://github.com/jb-alvarado/media-autobuild_suite !This happens for me with every DVD not just elephants dream! think I found the problem if I use: mplayer dvd://1 -dvd-device "f:\TestClips&Co\DVDs\ElephantsDream" -vo direct3d the input is handled fine if I add '-nosound' mplayer -nosound dvd://1 -dvd-device "f:\TestClips&Co\DVDs\ElephantsDream" -vo direct3d I get: MPEG: Missing video stream!? Contact the author, it may be a bug >> Same happens for mencoder, as soon as '-nosound' is present DVD handling fails. << Cu Selur Ps.: I also just tested with latest svn version "MPlayer SVN-r36824-4.8.2" where the problem is still present -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBCAAGBQJS+n/DAAoJEJA5OiupSg93JLcP/0MWHw73VotcGcImdpripXu1 +HVg6N+TTYNIPZblVSKXVnTC+2ichpaeclj252X3tbmL9hUKkpL+GKlLovC3PxVB M3sr3sSCeNBaU6rmSWCOWLLKINwpPYZrRakUETGpmBljCXnH8TI1B9UKtUQZ+bXI JS9VGoCDkLm4iGNq+XoWcQ33Ttif5tfKhlWD5NXcJhBHJW6zkT9AT5Wp/S1wHg2g jUvh46cxdztBTLbyPkQDkXzwCwOYw9vkSC45tb2v+/UQFI95kebQ/p0AGsjTy5ux OM33uW5OwOkpyg7ONrEtjUB5ULdkifLJVFSQiuHHv8w0yu85Lk0UiHFbIJvW9h/3 ZEnUR0pS6YMgf5NoHaxgFJsAh2jC3r3jSHcsEBt04O6RWI60G7A0uKwzfsg0Zu8y sdZjpdI+1slKZeEtsI8gpvo/snGbxU9nqWxhPlozPL1nhvayBvPQdyVzEuO1Eok/ 192dNHc9dspY0scyz08YU8ORLcrlL3sN1M4zS7+oBy5eFsWcofhhVIaYg9uwjt+U SnKQ2Y4C8T2z7eBlHpTAu0FqHXzuokilweVK1SijdWXIUQP9mbaLA/OfAGaUzq1v M/Ww7vMriK53s2LEWBboJ/NFLTEX9cw32sZdYqB5YvPrcU6xq2mOunyB1vJEwww/ qW03/4ntnG3xwyeZli6I =gdi9 -----END PGP SIGNATURE-----

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Re: [MEncoder-users] Opening Local SDP files with mencoder
by Carl Eugen Hoyos 09 Feb '14

09 Feb '14

Ben Barker <ben <at> bbarker.co.uk> writes: > The reason I was using mencoder was that I found if > I joined a multicast stream using a local SDP from ffmpeg, > either copying the video (so no transcoding), or > transcoding directly, then about 50% of the time the > output file could not then be opened again by ffmpeg - > complaining of damaged headers, and being able to open it > with ffmpeg was important for future processing. (For transcoding, this sounds impossible to me and if you would report this bug, it would be very welcome!) > Interetsinbgly, that same file that ffmpeg created, then > rejected, could reliably always be opened by either VLC > or mencoder / mplayer. Such a sample would be *very* welcome! > Capturing using mencoder I never had this problem, and ffmpeg > could always accept the mencoder output file. Since the > underlying libraries are the same in both cases, presumably > this is down to some extra checking mencoder is doing that > ffmpeg is not...? The underlying libraries are not the same, if you install an old version of live555 on your system and recompile MEncoder, it will use it. Carl Eugen

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