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  • Segmenting an audio stream or audio only file

    15 janvier 2013, par Luuk D. Jansen

    There is need for an audio only link for HTTP-live streaming. I now use the segmenter in FFMPEG for the video, and that works great. However, when giving an audio-file the segmenter does not seem to work, just creates one segment.

    The call to FFMPEG for the segmentation is :

    ffmpeg -i data/media/1/2/encoded.mp3 -y -c copy -flags global_header
    -map 0 -f segment -segment_time 10 -segment_list data/media/1/2/fileList.txt -segment_format libmp3lame
    data/media/1/2/segment_%05d.mp3

    I did put as the -segment_format 'libmp3lame' in, but it doesn't seem to make a difference.

    The first step is the encoding, this is the bedbug output :

    20:11:36,158 DEBUG ~ FFMPEG: ffmpeg version 0.10.2.git-d3d5e84 Copyright (c) 2000-2012 the FFmpeg developers
    
20:11:36,158 DEBUG ~ FFMPEG:   built on May  2 2012 19:00:38 with clang 3.0 (tags/Apple/clang-211.10.1)
    
20:11:36,158 DEBUG ~ FFMPEG:   configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm
    
20:11:36,158 DEBUG ~ FFMPEG:   libavutil      51. 44.100 / 51. 44.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libavcodec     54. 12.100 / 54. 12.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libavformat    54.  3.100 / 54.  3.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libavdevice    53.  4.100 / 53.  4.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libavfilter     2. 66.101 /  2. 66.101
    
20:11:36,158 DEBUG ~ FFMPEG:   libswscale      2.  1.100 /  2.  1.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libswresample   0. 10.100 /  0. 10.100
    
20:11:36,158 DEBUG ~ FFMPEG:   libpostproc    52.  0.100 / 52.  0.100
    
20:11:36,162 DEBUG ~ FFMPEG: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'data/media/1/1/test.m4a':
    
20:11:36,162 DEBUG ~ FFMPEG:   Metadata:
    
20:11:36,162 DEBUG ~ FFMPEG:     major_brand     : mp42
    
20:11:36,162 DEBUG ~ FFMPEG:     minor_version   : 1
    
20:11:36,163 DEBUG ~ FFMPEG:     compatible_brands: mp42mp41
    
20:11:36,163 DEBUG ~ FFMPEG:     creation_time   : 2011-12-07 18:53:04
    
20:11:36,163 DEBUG ~ FFMPEG:   Duration: 00:00:24.20, start: 0.000000, bitrate: 40 kb/s
    
20:11:36,163 DEBUG ~ FFMPEG:     Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, s16, 39 kb/s
    
20:11:36,163 DEBUG ~ FFMPEG:     Metadata:
    
20:11:36,163 DEBUG ~ FFMPEG:       creation_time   : 2011-12-07 18:53:04
    
20:11:36,163 DEBUG ~ FFMPEG:       handler_name    : Apple Sound Media Handler
    
20:11:36,170 DEBUG ~ FFMPEG: [mpegts @ 0x7fe4c404d000] muxrate VBR, pcr every 4 pkts, sdt every 200, pat/pmt every 40 pkts
    
20:11:36,171 DEBUG ~ FFMPEG: Output #0, mpegts, to '/Users/Luuk/Documents/Java/idoms-server/data/media/1/2/encoded.mp3':
    
20:11:36,171 DEBUG ~ FFMPEG:   Metadata:
    
20:11:36,171 DEBUG ~ FFMPEG:     major_brand     : mp42
    
20:11:36,171 DEBUG ~ FFMPEG:     minor_version   : 1
    
20:11:36,171 DEBUG ~ FFMPEG:     compatible_brands: mp42mp41
    
20:11:36,171 DEBUG ~ FFMPEG:     creation_time   : 2011-12-07 18:53:04
    
20:11:36,171 DEBUG ~ FFMPEG:     encoder         : Lavf54.3.100
    
20:11:36,171 DEBUG ~ FFMPEG:     Stream #0:0(eng): Audio: mp3, 48000 Hz, stereo, s16, 64 kb/s
    
20:11:36,171 DEBUG ~ FFMPEG:     Metadata:
    
20:11:36,171 DEBUG ~ FFMPEG:       creation_time   : 2011-12-07 18:53:04
    
20:11:36,171 DEBUG ~ FFMPEG:       handler_name    : Apple Sound Media Handler
    
20:11:36,171 DEBUG ~ FFMPEG: Stream mapping:
    
20:11:36,171 DEBUG ~ FFMPEG:   Stream #0:0 -> #0:0 (aac -> libmp3lame)
    
20:11:36,171 DEBUG ~ FFMPEG: Press [q] to stop, [?] for help
    
20:11:36,673 DEBUG ~ FFMPEG: size=     109kB time=00:00:12.79 bitrate=  69.5kbits/s    
    
20:11:37,156 DEBUG ~ FFMPEG: size=     209kB time=00:00:24.24 bitrate=  70.7kbits/s    
    
20:11:37,156 DEBUG ~ FFMPEG: video:0kB audio:190kB global headers:0kB muxing overhead 10.301383%

    Then the next is the segmentation (version 0.10.2 cannot do both at the same time yet) :

    20:11:37,211 DEBUG ~ FFMPEG: ffmpeg version 0.10.2.git-d3d5e84 Copyright (c) 2000-2012 the FFmpeg developers
    
    20:11:37,212 DEBUG ~ FFMPEG:   built on May  2 2012 19:00:38 with clang 3.0 (tags/Apple/clang-211.10.1)
    
    20:11:37,212 DEBUG ~ FFMPEG:   configuration: --prefix=/opt/local --enable-gpl --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libdirac --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libxvid --enable-libx264 --enable-libvpx --enable-libspeex --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm
    
    20:11:37,212 DEBUG ~ FFMPEG:   libavutil      51. 44.100 / 51. 44.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libavcodec     54. 12.100 / 54. 12.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libavformat    54.  3.100 / 54.  3.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libavdevice    53.  4.100 / 53.  4.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libavfilter     2. 66.101 /  2. 66.101
    
    20:11:37,212 DEBUG ~ FFMPEG:   libswscale      2.  1.100 /  2.  1.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libswresample   0. 10.100 /  0. 10.100
    
    20:11:37,212 DEBUG ~ FFMPEG:   libpostproc    52.  0.100 / 52.  0.100
    
    20:11:37,226 DEBUG ~ FFMPEG: [mpegts @ 0x7fccc2049800] max_analyze_duration 5000000 reached at 5016000
    
    20:11:37,226 DEBUG ~ FFMPEG: Input #0, mpegts, from '/Users/Luuk/Documents/Java/idoms-server/data/media/1/2/encoded.mp3':
    
    20:11:37,226 DEBUG ~ FFMPEG:   Duration: 00:00:24.12, start: 1.376978, bitrate: 71 kb/s
    
    20:11:37,226 DEBUG ~ FFMPEG:   Program 1 
    
    20:11:37,226 DEBUG ~ FFMPEG:     Metadata:
    
    20:11:37,226 DEBUG ~ FFMPEG:       service_name    : Service01
    
    20:11:37,226 DEBUG ~ FFMPEG:       service_provider: FFmpeg
    
    20:11:37,226 DEBUG ~ FFMPEG:     Stream #0:0[0x100](eng): Audio: mp3 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16, 64 kb/s
    
    20:11:37,226 DEBUG ~ FFMPEG: Output #0, segment, to '/Users/Luuk/Documents/Java/idoms-server/data/media/1/2/segment_%05d.mp3':
    
    20:11:37,226 DEBUG ~ FFMPEG:   Metadata:
    
    20:11:37,226 DEBUG ~ FFMPEG:     encoder         : Lavf54.3.100
    
    20:11:37,226 DEBUG ~ FFMPEG:     Stream #0:0(eng): Audio: mp3 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, 64 kb/s
    
    20:11:37,226 DEBUG ~ FFMPEG: Stream mapping:
    
    20:11:37,226 DEBUG ~ FFMPEG:   Stream #0:0 -> #0:0 (copy)
    
    20:11:37,226 DEBUG ~ FFMPEG: Press [q] to stop, [?] for help
    
    20:11:37,238 DEBUG ~ FFMPEG: size=       0kB time=00:00:24.28 bitrate=   0.0kbits/s    
    
    20:11:37,238 DEBUG ~ FFMPEG: video:0kB audio:190kB global headers:0kB muxing overhead -100.000000%

  • How to batch convert mp4 files to ogg with ffmpeg using a bash command or Ruby

    3 avril 2013, par TJ Sherrill

    I am running a OSX, don't know tons about video conversions. But I have like 200 videos that are all in mp4 format and won't play in Firefox. I need to convert them to ogg to use the html5 video tag.

    These files live in a folder structure that makes it hard to do files one at a time. I would like the bash command or Ruby command to go through all child folders and find all .mp4's and convert them.

    I found one reference of how to do this with Google : http://athmasagar.wordpress.com/2011/05/12/a-bash-script-to-convert-mp4-files-to-oggogv/

    #!/bin/bash
    
for f in $(ls *mp4 | sed ‘s/\(.*\)\..*/\1/’)
    
do
    
ffmpeg -i $f.mp4 -acodec vorbis -vcodec libtheora $f.ogg
    
done

    But have no idea how to convert this from linux to osx.

  • ffmpeg not finding vcodec libx264

    30 juillet 2013, par Ofeargall

    I've installed the latest ffmpeg but it seems unable to locate the video codecs. Do I need to completeley remove ffmpeg and re run the ./configure differently in order for ffmpeg to find the video codecs ?

    Here's my current configuration :

    FFmpeg version git-f61cbc2, Copyright (c) 2000-2011 the FFmpeg developers
     built on Jan 18 2011 10:59:49 with gcc 4.0.1 (Apple Inc. build 5465)
     configuration: --enable-libmp3lame --enable-shared --disable-mmx --arch=x86_64
     libavutil     50.36. 0 / 50.36. 0
     libavcore      0.16. 1 /  0.16. 1
     libavcodec    52.108. 0 / 52.108. 0
     libavformat   52.94. 0 / 52.94. 0
     libavdevice   52. 2. 3 / 52. 2. 3
     libavfilter    1.74. 0 /  1.74. 0
     libswscale     0.12. 0 /  0.12. 0

    Or, can I just re-run the make command to include the library ?

    Here's my snippet for transcoding :

    ffmpeg -i ~/Desktop/watercarts.mov -vcodec libx264 -b 250k -bt 50k -acodec libfaac -ab 56k -ac 2 -s 480x320 ~/Desktop/watercartsipod.mp4

    And the error :

    Unknown encoder 'libx264'

    Thank you in advance.

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