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mencoder stream transcoding and frame rates.
by Michael Kohne 22 Aug '18

22 Aug '18

I'm using mencoder to transcode data from an RTSP server (Sony EP-580 IP camera, sending H.264) to an mpeg42 AVI file, and my output AVI files are ending up short about 70 frames per minute. What I suspect is that mencoder is using the input frames as the clock to drive the transcoding. Thus, when stream frames go missing (as they regularly do on my setup), output frames are ALSO missing. During transcoding, mencoder is showing a framerate anywhere from 27-28.5 fps. For my application (we're capturing video data time synchronized with other data) I REALLY need the output to be exactly 30 fps, no matter what happens to the input. (I need this for compatibility with other tools that I don't control). So what I want is a way to decouple the output frame rate clock from the input frame rate clock. Obviously this will require duplication or dropping of frames, and I'm fine with that, but so far I haven't found a way to accomplish it at all. Can this be done at all with mencoder? mencoder version is MPlayer-1.3.0. Stream is video only. mencoder -prefer-ipv4 -rtsp-port 62000 -user admin -passwd admin -fps 30 rtsp://192.168.0.113/media/video1 -ofps 30 -o output.avi -ovc lavc -lavcopts vcodec=msmpeg4v2:vrc_buf_size=10000:vratetol=1000000:vbitrate=4096:vrc_maxrate=4915:keyint=30 -noodml Michael Kohne Senior Software Engineer Office: 215.283.0860 x208 mhkohne(a)moberg.com -- Celebrating 20 Years Transforming Neurocritical Care Moberg Research, Inc. 224 S Maple Street, Ambler, PA 19002 24/7 Customer Support: 888.662.7246 www.moberg.com <https://www.moberg.com/>

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using the -geometry switch
by arthurpeabody 20 Aug '18

20 Aug '18

Quoth Miriam English: 'you still didn't tell us what command you're typing in.' I thought I did. This mailing list is about the program mplayer, so you know that the command began with mplayer; this thread is about the -geometry switch, so you know the first argument is -geometry; I reported the parameters I supplied to -geometry in my message I restarted X without a window manager, just an xterm, and the -geometry switch worked properly, so it is my WM, which is more important than not having to move mplayer's display around. It's not an mplayer problem. If anyone has any tips about how to configure the WM I'd appreciate them though. I only use it to allow multiple windows; I start every app from the command line. It's FVWM95.

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Using the -geometry switch
by arthurpeabody 20 Aug '18

20 Aug '18

Silvio wrote: 'For me it works fine with this command: mplayer -geometry -0+0 file` No : ? Alexander Strasser wrote: 'What command lines did you try exactly?' I've tried 100%:100% 0%:100% 100%:0% 100:0 0:100 1000:0 0:1000 - they made no difference Alexander Strasser wrote: ' Maybe your window manager overrides the window position? You could try killing the wm and then try to start MPlayer with -geometry like you tried before. ' That's drastic. Alexander Strasser wrote: 'correct DISPLAY environment variable' Hmmm... It's :7.0 now - what should it be?

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Using the -geometry switch
by arthurpeabody 20 Aug '18

20 Aug '18

I want the video to display in the top-right of the screen. No setting of -geometry makes any difference; it always displays on the bottom-center. I've tried percentages and numbers. The display mode is xv.

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[PATCH] mplayer compilation failure with recent ffmpeg
by dieter 08 Aug '18

08 Aug '18

Hi, I think the compilation failure is caused by ffmpeg commit 3735d55af32e845a7fe591bc4023c057f8e513f9 With this patch for MPlayer's configure it compiles again for me with current ffmpeg: svn diff configure Index: configure =================================================================== --- configure (Revision 38113) +++ configure (Arbeitskopie) @@ -1554,7 +1554,7 @@ echocheck "ffmpeg/libavcodec/allcodecs.c" libavdecoders_all=$(list_subparts_extern AVCodec decoder codec/allcodecs.c) libavencoders_all=$(list_subparts_extern AVCodec encoder codec/allcodecs.c) -libavparsers_all=$(list_subparts_extern AVCodecParser parser codec/parser.c) +libavparsers_all=$(list_subparts_extern AVCodecParser parser codec/parsers.c) test $? -eq 0 && _list_subparts=found || _list_subparts="not found" echores "$_list_subparts" Regards, Dieter

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configure still not fixed
by sylvain.bertrand＠gmail.com 08 Aug '18

08 Aug '18

Hi, As of today, configure still have codec/parser.c instead of codec/parsers.c cheers, -- Sylvain

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mplayer compilation failure with recent ffmpeg
by sylvain.bertrand＠gmail.com 29 Jul '18

29 Jul '18

Hi, mplayer export of 2018/07/22, fails to compile with ffmpeg commit 3237f018fd0e0c0fe8ffb2b1cece23ee58a220a8 (fetched on the 22nd) I get the following final link error: ffmpeg/libavcodec/h263dec.o: In function `ff_h263_decode_frame': h263dec.c:(.text+0xd73): undefined reference to `ff_h263_find_frame_end' h263dec.c:(.text+0xf20): undefined reference to `ff_mpeg4_find_frame_end' ffmpeg/libavcodec/mlpdec.o: In function `read_access_unit': mlpdec.c:(.text+0x79d): undefined reference to `ff_mlp_read_major_sync' mlpdec.c:(.text+0xa37): undefined reference to `ff_mlp_calculate_parity' mlpdec.c:(.text+0xa4c): undefined reference to `ff_mlp_calculate_parity' mlpdec.c:(.text+0x146c): undefined reference to `ff_mlp_calculate_parity' mlpdec.c:(.text+0x1479): undefined reference to `ff_mlp_checksum8' mlpdec.c:(.text+0x1e68): undefined reference to `ff_mlp_restart_checksum' ffmpeg/libavcodec/mlpdec.o: In function `mlp_decode_init': mlpdec.c:(.text.unlikely+0x35): undefined reference to `ff_mlp_huffman_tables' mlpdec.c:(.text.unlikely+0x85): undefined reference to `ff_mlp_huffman_tables' mlpdec.c:(.text.unlikely+0xdb): undefined reference to `ff_mlp_huffman_tables' mlpdec.c:(.text.unlikely+0x121): undefined reference to `ff_mlp_init_crc' ffmpeg/libavcodec/ac3dec_fixed.o: In function `ac3_decode_frame': ac3dec_fixed.c:(.text+0x3eb7): undefined reference to `ff_ac3_parse_header' ac3dec_fixed.c:(.text+0x4265): undefined reference to `ff_ac3_parse_header' ffmpeg/libavcodec/ac3dec_float.o: In function `ac3_decode_frame': ac3dec_float.c:(.text+0x39bb): undefined reference to `ff_ac3_parse_header' ac3dec_float.c:(.text+0x3d7d): undefined reference to `ff_ac3_parse_header' ffmpeg/libavcodec/eac3_core_bsf.o: In function `eac3_core_filter': eac3_core_bsf.c:(.text+0x62): undefined reference to `ff_ac3_parse_header' ffmpeg/libavcodec/eac3_core_bsf.o:eac3_core_bsf.c:(.text+0x154): more undefined references to `ff_ac3_parse_header' follow collect2: error: ld returned 1 exit status make: *** [Makefile;747: mplayer] Error 1 regards, -- Sylvain

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combining a still with an audio file
by arthurpeabody 25 Jul '18

25 Jul '18

I have an audio file I want to publish on YouTube. YouTube requires a video file. I want to combine a still with the audio file to make a video file. How do I do that? (Linux)

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--yasm
by sylvain.bertrand＠gmail.com 23 Jul '18

23 Jul '18

Hi again, It seems the --yasm configuration option is used to assemble only the ffmpeg assembly source code. But ffmpeg has been using nasm syntax (aka the nasm preprocessor) for a long time. A switch from --yasm to --nasm? regards, -- Sylvain

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bmovl usage and transparent mode
by adrien.bosc＠bertin.fr 07 Jun '18

07 Jun '18

Hi, I am trying to display an overlay using bmovl function of mplayer. Everything is well displayed when the option is configured to opaque ( bmovl=0:1), but not working correctly when in alphablending (transparent) mode (bmovl=0:0) When in transparent mode, only pixels with alpha at 256 are displayed and, for example, when I draw a rectangle, I can see a non linear offset on each line. It is also only black and white. Again, with the opaque option, everything is well displayed I am running mplayer like this: execlp("xterm", "xterm", "-e", "mplayer", "-demuxer", "h264es", "-fs", "/tmp/fifo_mplayer", "-vf", "bmovl=0:0:/tmp/fifo_mplayer_overlay", NULL); I tried this on Ubuntu 16.04 (On a Virtual Machine and on a real one) with mplayer 1.2.1 and 1.3.0 and the result is the same. Any idea about what I can miss? 1

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