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• ffmpeg with Videoconverter.js MTS to .mp4 conversion issue

  24 juin 2014, par user3679718

  I’ve been scratching my head over this issue and going through dozens of google search results to find a solution to this, but no luck. I’ve got an issue when trying to convert MTS to mp4 with Videoconverter.js, which uses ffmpeg commands for converting video. I have installed ffmpeg, and run successfully .webm to .mp4 conversions. I’ve changed the Videoconverter.js file that specifies files to be used in the terminal, and I’m using commands from tutorials for MTS conversions (I’ve tried multiple options already), but to no avail. I keep getting "File not found", although it certainly is there, next to .webm which I converted before successfully.
  Anyone know what this might be ?

  Worker has received command
  
  Received command: -i 00091.MTS -vcodec mpeg4 -b:v 15M -acodec libmp3lame -b:a 192k output.mp4.          Processing with 268435456 bits.
  
  ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun  9 2014 20:24:32 with emcc (Emscripten GCC-like replacement) 1.12.0 (commit  6960d2296299e96d43e694806f5d35799ef8d39c)
  
    configuration: --cc=emcc --prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist --extra-cflags='-I/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/include -v' --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-doc --disable-devices --disable-pthreads --disable-w32threads --disable-network --disable-hwaccels --disable-parsers --disable-bsfs --disable-debug --disable-protocols --disable-indevs --disable-outdevs --enable-protocol=file --enable-libvpx --enable-gpl --extra-libs='/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libx264.a /Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libvpx.a'
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  00091.MTS: No such file or directory
  
  Finished processing (took 140ms)

• Converting GridFS file object to File object to upload via carriewave then process with ffmpeg in Rails

  20 juin 2014, par Ojash

  I have a GridFS file object

  Mongoid::GridFs::Fs::File _id: 53a277dc700ca7ac146f5797, length: 2237337, chunkSize: 261120, uploadDate: 2014-06-19 05:40:44 UTC, md5: "390968a8ef198f8537495468366f67b9", filename: "720p_5.MP4", contentType: "binary/octet-stream", aliases: nil, metadata: nil

  Now I need a Tempfile(or File will do) instance from that

  File:/tmp/fileupload20140620-4601-19via7k

  Since the file that I process is a video file i need to further process it with the ffmpeg to get different versions of the video file

  normally I could get a tmp file but the tempfile size seems to be quite low for a video file and the ffmpeg also gives error, may be the temp file created is not correct. I have no idea what did i do wrong.

• Missing reference frame, slice header decode error

  20 juin 2014, par AnilJ

  I split this (http://www.auby.no/files/video_tests/h264_720p_mp_3.1_3mbps_aac_shrinkage.mp4) video using mp4box command "MP4Box -split 1 shrinking.mp4" into slices of 1 second each. I have following questions :

  1. I got different sizes of the video although I sliced it evenly at 1 second. Not sure how this happened ?
  2. When I try to dump the information about the video slice file, I get the below message with an error. Can someone please help me understand what it is, and how possibly I can modify the command above to get rid of it ? This error occurs for every video slide generated. This error comes only on the sliced videos.

  Thanks,
  /anil.

  anilj@desk1:~/workspace/testprogs/shellscripts$ ffmpeg -i invideo/shrinking_01.mp4
  
  ffmpeg version N-36083-g2501f93-xuggle-5.5 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun  3 2014 13:43:04 with gcc 4.6.4
  
    configuration: --prefix=/home/anilj/workspace/xugglehome --extra-version=xuggle-5.5 --extra-cflags=-I/home/anilj/workspace/xuggle-xuggler/build/native/x86_64-unknown-linux-gnu/captive/stage/home/anilj/workspace/xugglehome/include --extra-ldflags=-L/home/anilj/workspace/xuggle-xuggler/build/native/x86_64-unknown-linux-gnu/captive/stage/home/anilj/workspace/xugglehome/lib --disable-shared --enable-pic --enable-gpl --enable-nonfree --enable-libx264 --enable-version3 --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libvo-aacenc --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-openssl --enable-zlib --enable-libvpx
  
    libavutil      51. 46.100 / 51. 46.100
  
    libavcodec     54. 14.101 / 54. 14.101
  
    libavformat    54.  3.100 / 54.  3.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 67.101 /  2. 67.101
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 10.100 /  0. 10.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [h264 @ 0x1ddeac0] Missing reference picture
  
  [h264 @ 0x1ddeac0] decode_slice_header error
  
  [h264 @ 0x1ddeac0] Missing reference picture
  
  [h264 @ 0x1ddeac0] decode_slice_header error
  
  [h264 @ 0x1ddeac0] Missing reference picture
  
  [h264 @ 0x1ddeac0] decode_slice_header error
  
  [h264 @ 0x1ddeac0] Missing reference picture
  
  [h264 @ 0x1ddeac0] decode_slice_header error
  
  [h264 @ 0x1ddeac0] concealing 3600 DC, 3600 AC, 3600 MV errors
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'invideo/shrinking_01.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isom
  
      creation_time   : 2014-06-19 20:21:02
  
    Duration: 00:00:00.90, start: 0.000000, bitrate: 38 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 30 kb/s, 29.96 fps, 29.96 tbr, 29956 tbn, 59.92 tbc
  
      Metadata:
  
        creation_time   : 2011-05-05 18:09:35
  
        handler_name    : ?Apple Video Media Handler
  
  At least one output file must be specified