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• An ISO ripped from a DVD-Video is empty but still plays in Apple DVD-Player ?

  7 avril 2015, par IAmDamoSuzuki

  I’ve run across a number of DVDs that seem to contain no visible data. The ISOs that I rip from them (using ddrescue) contain no VIDEO_TS folders, or any folders at all. However, if I use df on the mounted filesystem it claims to have a size.

  Even stranger however, is that the Apple DVD-Player and MPEG-Streamclip will still open and play the DVD. I’m unable to process the ISOs using ffmpeg because terminal can’t see any files !

  Has anybody experienced something like this before ?

• ffmpeg unrecognized option 'segment_list_flags'

  28 septembre 2012, par user1704620

  this is my first time ever posting a question on here, so bear with me. I'm using Ubuntu 12.04 and ffmpeg version 0.11.2, and I'm trying to capture a video from /dev/video0, segment the videos, and then create an m3u8 list file that lists all the segments. According to the ffmpeg documentation at http://ffmpeg.org/ffmpeg.html#Synopsis , ffmpeg supports certain options when creating a list file like '-segment_list_flags' and '-segment_list_type'. When I tried implementing these into my script, though, I just got an error that said :"unrecognized option 'segment_list_flags'" or "unrecognized option 'segment_list_type'". The actual command that I'm typing in looks like this :

    ffmpeg -f video4linux2 -s wvga -t ${CAPTURE_DURATION} -i "/dev/video0" \ 
  
    -vcodec ${VID_CODEC} -b:v 96k -flags +loop -cmp +chroma \
  
    -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 \
  
    -me_range 16 -keyint_min 25 -sc_threshold 40 -map 0 -flags -global_header \
  
    -i_qfactor 0.71 -bt 200k -maxrate 96k -bufsize 96k -rc_eq 'blurCplx^(1-qComp)' \
  
    -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 320:240 -g 30 \
  
    -async 2 -preset fast -crf 22 -threads 0 -sameq -f segment -segment_time ${SEG_TIME} \
  
    -segment_list ${LOCATE}${OUTPUT}_first.m3u8 -segment_list_flags +live \
  
    -segment_list_size ${SEG_LIST_SIZE} -segment_format ${SEG_FORMAT} -acodec libmp3lame \
  
    -ar 4800 -ab 64k -y "${LOCATE}${OUTPUT}%01d.${EXTENSION}"

  In other parts of my script, I obviously have those variables that you see defined, and they all work fine. I should mention that before I tried implementing the -segment_list_flags option, it did spit out a list file, but it wasn't a legal .m3u8 list file that I would need for Http Live Streaming. It just sequentially listed the different $LOCATE$OUPUT segments that I told it to create.

  The full output of my command in the terminal is this :

  ffmpeg version 0.11.2 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Sep 27 2012 13:32:44 with gcc 4.6.3
  
    configuration: --enable-gpl --enable-gray --enable-runtime-cpudetect --enable-bzlib --enable-gnutls --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libcdio --enable-libdc1394 --enable-libfaac --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-openal --enable-openssl --enable-zlib --enable-nonfree --enable-version3 --enable-x11grab
  
  
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  
  
  [video4linux2,v4l2 @ 0x30e1e80] The V4L2 driver changed the video from 852x480 to 640x480
  
  [video4linux2,v4l2 @ 0x30e1e80] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 10590.729975, bitrate: 110592 kb/s
  
      Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 640x480, 110592 kb/s, 30 tbr, 1000k tbn, 30 tbc
  
  Unrecognized option 'segment_list_flags'
  
  Failed to set value '+live' for option 'segment_list_flags'

  If any one knows why it's giving me this error, I'd really appreciate if you could help out. Maybe I don't have some option enabled from the ./configure ?

• Cannot stream webcam using ffserver because of malloc error [migrated]

  21 septembre 2012, par user1509326

  I was following this tutorial RaspBerry Pi webcam and when I run the following command from root :

  $ ffserver -f /root/ffserver.conf & ffmpeg -v 2 -r 5 -s 640x480 -f video4linux2 -i /dev/video1` http://localhost:8090/webcam.ffm

  The camera is turned on and everything is fine, except it does not stream. I checked the terminal. From video 1, I get the following error :

  bind(port 8090): Address already in use
  
  *** glibc detected *** ffmpeg: malloc(): smallbin double linked list corrupted: 0x0000000000e5ac00 **

  When I use another port like 5000, I get the same result :

  $ ffserver -f /root/ffserver.conf & ffmpeg -v 2 -r 5 -s 640x480 -f video4linux2 -i /dev/video1 http://localhost:8090/webcam.ffm
  
  [2] 3795
  
  avserver version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  
    built on Jun 12 2012 16:52:09 with gcc 4.6.3
  
  *** glibc detected *** ffmpeg: malloc(): smallbin double linked list corrupted: 0x0000000000b77c00 ***