Hello Bernie, thanks. Here is what happened: janos@andraslinux ~/tmp $ cat stream.yuv | yuvscaler -O SVCD | mpeg2enc -f 4 -o video_svcd.m2v & mplayer -nosound -noframedrop -vo yuv4mpeg ezcap0001.avi
[1] 21535 INFO: [yuvscaler] yuvscaler 2.2.1 11-Dec-2007 INFO: [yuvscaler] (C) 2001-2004 Xavier Biquard <xbiqu...@free.fr>, yuvscaler -h for help, or man yuvscaler INFO: [mpeg2enc] SETTING EXTENDED MMX for MOTION! INFO: [mpeg2enc] SETTING SSE and MMX for TRANSFORM! INFO: [mpeg2enc] SETTING EXTENDED MMX for PREDICTION! MPlayer 1.4-11.3.0 (C) 2000-2019 MPlayer Team Playing ezcap0001.avi. libavformat version 58.76.100 (external) AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 1 VIDEO: [XVID] 800x592 24bpp 30.000 fps 896.5 kbps (109.4 kbyte/s) Error opening/initializing the selected video_out (-vo) device. No stream found. Exiting... (End of file) janos@andraslinux ~/tmp $ ls ezcap0001.avi stream.yuv I don't understand. if I issue command janos@andraslinux ~/tmp $ mplayer ezcap0001.avi MPlayer 1.4-11.3.0 (C) 2000-2019 MPlayer Team Playing ezcap0001.avi. libavformat version 58.76.100 (external) AVI file format detected. [aviheader] Video stream found, -vid 0 [aviheader] Audio stream found, -aid 1 VIDEO: [XVID] 800x592 24bpp 30.000 fps 896.5 kbps (109.4 kbyte/s) ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 58.134.100 (external) [mpeg4 @ 0x7ff6ba3a8f60]Requested frame threading with a custom get_buffer2() implementation which is not marked as thread safe. This is not supported anymore, make your callback thread-safe. Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4) ========================================================================== Load subtitles in ./ ========================================================================== Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8000->176400) Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III) ========================================================================== AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) Starting playback... Movie-Aspect is undefined - no prescaling applied. VO: [xv] 800x592 => 800x592 Planar YV12 Movie-Aspect is 1.35:1 - prescaling to correct movie aspect. VO: [xv] 800x592 => 800x592 Planar YV12 A: 16.2 V: 16.2 A-V: -0.001 ct: 0.012 486/486 27% 0% 0.9% 17 0 Exiting... (Quit) janos@andraslinux ~/tmp $ the file starts to play almost imediately in a new window, perfectly with sound and picture. So the video-out (-vo) device works automatically with mplayer. Janos P.S. I'm sending this message from my other email address, a mailserver on my fitlet machine where I try glav, etc. On Thu, 06 Oct 2022 08:06:19 -0400 "Janos G. Komaromi" <ja...@jankom.net> wrote: > -------- Forwarded Message -------- > From: Bernhard Praschinger <bernh...@griesbach.at> > To: Janos G. Komaromi <ja...@jankom.net>, MJPEG-tools user list > <mjpeg-users@lists.sourceforge.net> > Subject: Re: [Mjpeg-users] glav error opening .avi file > Date: Thu, 6 Oct 2022 06:27:00 +0200 > Mailer: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 > Firefox/68.0 SeaMonkey/2.53.13 > > Hallo, > > mkfifo creates a file where one file/process reads it's content, and > another process puts data into. You need is when program data can't > pipe > direct to each other. So you create the named pipe. You start > afterwards > the process that reads the data and as last step you put the data into > it. > > The commands for the video would than be in one terminal window: > > mkfifo stream.yuv > > cat stream.yuv │ yuvscaler -O SVCD │ mpeg2enc -f 4 -o > video_svcd.m2v & > > mplayer -nosound -noframedrop -vo yuv4mpeg ezcap0001.avi > > Don't forget to add the & in the 2nd line to start the process in the > background. You don't need to start mplayer in the background. > > For audio: > > mplayer -vo null -ao pcm:file=audio.wav ezcap0001.avi > > cat audio.wav │ mp2enc -v 2 -V -o sound.mp2 > > Afterwards mutiplex the files together with: > mplex -f 4 sound.mp2 video_svcd.m2v -o SVCD.mpg > > You have then a encoded MPEG file with ist suitable for SVCD. You > need to change the commands for you need. > What do you want with the AVI file ? > > If you encounter errors please add the output to the mail. > > Janos G. Komaromi wrote: > > Hi Bernie, thanks for your answer. Sorry, I have not been doing > > video edits lately, so I need a little more help. Lat time I used > > Cinelerra for video edit on my old FC-3 desktop. > > > > I tried > > Quote > > > mkfifo stream.yuv > > > >cat stream.yuv │ yuvdenoise │ yuvscaler -O SVCD │ mpeg2enc -f 4 > > > -o > > > video_svcd.m2v > > > >mplayer -nosound -noframedrop -vo yuv4mpeg anyfile.mpg > > > > > > For Audio: > > > >mplayer -vo null -ao pcm:file=anyfile.wav anyfile.mpg > > > > cat anyfile.wav │ mp2enc -v 2 -V -o sound.mp2 > > > > > Unquote > > > > but did not get far. > > > > My video clip is "ezcap0001.avi" as shown in DETAILS below. What are > > the exact commands I need to issue? How do I make the "stream.yuv"? > > If > > I just issue the command "mkfifo stream.yuv" it creates a zero byte > > pipe file that the next command uses: "cat stream.yuv | > > yuvdenoise.... > > etc", but it does not do anything. And what is the "anyfile.mpg" > > output? Is it the file that can be edited with glav? If it is only > > the > > picture content of my video how the edited version will be > > synchronized > > with the unedited sound part of the original clip? > > > > Sorry, these may be stupid questions but I'd like to understand the > > whole thing better. OK, there is the RTFM principle, and I read > > MJPEG HOWTO document 4.1 through 4.3 but still don't know how to > > edit my "ezcap0001.avi" video file with glav. > > > > PLease, explain - Janos > > P.S. tried other opensource linux video editors on my Gentoo > > machine, but openshot does not run, and could not compile flowblade > > yet. I like > > the simplicity of your glav. > > > > On Thu, 2022-09-29 at 19:20 +0200, Bernhard Praschinger wrote: > > ... > > > > > > > > DETAILS: > > > > janos@andraslinux ~/tmp $ lavplay -p S -v 2 ezcap0001.avi > > > > lavplay2.2.1 > > > > lavtools version 2.2.1 > > > > --DEBUG: [lavplay] Opening video file ezcap0001.avi ... > > > > **ERROR: [lavplay] Error opening ezcap0001.avi > > > > > > > > janos@andraslinux ~/tmp $ file ezcap0001.avi > > > > ezcap0001.avi: RIFF (little-endian) data, AVI, 800 x 592, 30.00 > > > > fps, > > > > video: XviD, audio: MPEG-1 Layer 3 (stereo, 44100 Hz) > > > > > > > > janos@andraslinux ~/tmp $ ffprobe ezcap0001.avi > > > > ffprobe version 4.4.2 Copyright (c) 2007-2021 the FFmpeg > > > > developers > > > > built with gcc 11.3.0 (Gentoo 11.3.0 p4) > > > > ... > > > > Input #0, avi, from 'ezcap0001.avi': > > > > Duration: 01:48:51.67, start: 0.000000, bitrate: 967 kb/s > > > > Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / > > > > 0x44495658), yuv420p, 800x592 [SAR 1:1 DAR 50:37], 896 kb/s, 30 > > > > fps, 30 > > > > tbr, 30 tbn, 30 tbc Stream #0:1: Audio: mp3 (U[0][0][0] / > > > > 0x0055), > > > > 44100 Hz, stereo, fltp, 64 kb/sThe mjpegtools can only handle a > > > > few > > > > AVI Codecs. For example: dvvideo > > > and mjpeg it can't decode the encoded MPEG4 > > > > > > I don't know if ffmpeg can decode it in a format the mjpegtools > > > understand. But mplayer can (should) do it, here is are example > > > commands > > > for video: > > > >mkfifo stream.yuv > > > >cat stream.yuv │ yuvdenoise │ yuvscaler -O SVCD │ mpeg2enc -f > > > 4 -o > > > video_svcd.m2v > > > >mplayer -nosound -noframedrop -vo yuv4mpeg anyfile.mpg > > > > > > For Audio: > > > >mplayer -vo null -ao pcm:file=anyfile.wav anyfile.mpg > > > > cat anyfile.wav │ mp2enc -v 2 -V -o sound.mp2 > > > > > > You find a section in the: mjpegtools manpage called: Decoding > > > streams > > > with mplayer that should explain it in more detail. I hope the > > > program > auf hoffentlich bald, > > Berni the Chaos of Woodquarter > > Email: bernh...@griesbach.at > www: http://www.lysator.liu.se/~gz/bernhard _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
