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Thread: FFmpeg Mplayer VLC - News & Howtos

  1. #11
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    Talking Re: FFmpeg Mplayer VLC - News & Howtos

    Quote Originally Posted by nothingspecial View Post
    Please do not use this thread to ask specific questions.

    If someone is searching the forums for an answer about subtitle files, how are they expected to find it in a thread titled "FFmpeg Mplayer VLC - News & Howtos" ?
    Hence why my starting post indicated that posters of new material should go advanced and then edit the title for their post.

    A search (especially if you pick "Beans" instead of "Threads") will return the post. (although in this case it was beaten to the top by your post )

    So please all new info posters, change the title of your post
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  2. #12
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    Update to vlc-git guide...

    I have upgraded the version of FFmpeg used for my guide:

    Howto: Build the development version of vlc under Ubuntu
    *********************************/vlc.html

    and it all builds and runs well on Quantal as of:

    Code:
    andrew@corinth:~$ cvlc --version | head -n 3
    VLC media player 2.1.0-git Rincewind (revision 7f4f09b)
    VLC version 2.1.0-git Rincewind (7f4f09b)
    Compiled by andrew on corinth (Dec 21 2012 15:34:31)
    Compiler: gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
    Still a lot of fun building this version
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  3. #13
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    Smile Create Movie From Single Image And Sound File

    Moving on from this thread:

    http://ubuntuforums.org/showthread.php?t=1502537

    which is now closed, loop_input is now deprecated in favour of loop 1. So to create a film from one image file, to the length of one audio file, like the ones you see on youtube, do something like this:
    Code:
    ffmpeg -loop 1 -shortest -i input.jpg -i input.mp3 \
    -acodec copy -c:v mjpeg-aspect 16:9 output.mp4
    You may wish to play around with bitrates and scale too.
    Last edited by Merrattic; December 24th, 2012 at 02:40 AM.
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  4. #14
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    audio bulk convert

    not seen this thread yet so a few for your perusal


    audio bulk convert

    keeps tags!




    flac to 320 mp3

    for f in *flac; do ffmpeg -i "$f" -b:a 320k -c:a libmp3lame "${f%.*}.mp3"; done

    alac to flac

    for f in *.m4a; do ffmpeg -i "$f" "${f%.m4a}.flac"; done
    flac to alac

    for f in *.flac; do ffmpeg -i "$f" -c:a alac "${f%.flac}.m4a"; done

    use from and to any audio format simply modifying codec/bitrate/channels etc...


    ac3 to aac [with or without 5.1] requires this version of ffmpeg

    for f in *.ac3; do ffmpeg -i "$f" -c:a libfdk_aac -b:a 448k "${f%.*ac3}.aac"; done
    Last edited by shantiq; December 24th, 2012 at 07:02 PM.
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  5. #15
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    Re: audio bulk convert

    I do something similar :

    This one strips the audio from an mp4 video and converts to mp3:

    Code:
    #!/bin/bash
    
    #convert mp4 to mp3
    
    FILES="*.mp4"
    
    for F in $FILES
    
    do
    newname=`basename "$F" .mp4`
    ffmpeg -i "$F" -vn -c:a libmp3lame -ac 2 -ab 192k -ar 44100 "$newname.mp3"
    
    done
    Again, just change the extensions/bitrates/codecs for different formats, and if doing audio to audio remove the "-vn" part.
    Last edited by Merrattic; December 24th, 2012 at 04:14 PM.
    The best things in life are free, so what are we paying for?

  6. #16
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    Changes in man and help

    "ffmpeg -h" used to include all options. You can now control how much help you want to be displayed:
    Code:
    ffmpeg -h      -- print basic options
    ffmpeg -h long -- print more options
    ffmpeg -h full -- print all options (including all format and codec specific options, very long)
    "man ffmpeg" has also seen some changes and has been broken up into specific sections:
    Code:
    SEE ALSO
           ffplay(1), ffprobe(1), ffserver(1), ffmpeg-utils(1),
           ffmpeg-scaler(1), ffmpeg-resampler(1), ffmpeg-codecs(1),
           ffmpeg-bitstream-filters(1), ffmpeg-formats(1), ffmpeg-devices(1),
           ffmpeg-protocols(1), ffmpeg-filters(1)
    Also see Andrew's example at ffmpeg new syntax.
    Last edited by FakeOutdoorsman; December 25th, 2012 at 10:13 PM.

  7. #17
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    Re: FFmpeg Mplayer VLC - News & Howtos

    Looks good, those FFmpeg guys never stop
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  8. #18
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    Concatenation script.....

    Many questions on these Forums concerning stitching together videos, this nice script might be the answer to many posts:

    http://ffmpeg.org/trac/ffmpeg/wiki/H...0media%20files

    Down the bottom of the page. I changed the EXTRA_OPTIONS and changed all the -vcodec -acodec stuff (although I believe it still works with git FFmpeg) and off I went. Interested to know how others find this script?
    You think that's air you're breathing now?

  9. #19
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    Ubuntu 12.04 Precise Pangolin

    Re: Concatenation script.....

    That script should work, but anyone using the repo version should change all instances of 'ffmpeg' to 'avconv' within the script, to be on the safe side.

    There is a concat filter included with recent versions of ffmpeg that should enable people to do the same without the need for an external script, but I haven't tried it out yet, so I don't know how well it works (I may play around with it some time today or tomorrow, if I do I'll post usage etc in this thread). EDIT: if someone with the repo version of avconv could post up the output of

    Code:
    avconv -filters | grep concat
    that would tell me if the filter method is available to Ubuntu avconv users.
    Last edited by evilsoup; January 3rd, 2013 at 11:46 AM.

  10. #20
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    Re: FFmpeg Mplayer VLC - News & Howtos

    I keep a relatively clean Quantal VM and it is not there
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