Missing several seconds of many videos

[l0b0]

It looks like there's some issue with timestamp handling:

$ youtube-dl --version
2015.06.04.1
$ youtube-dl --verbose  'http://www.ted.com/talks/ken_robinson_says_schools_kill_creativity'
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'http://www.ted.com/talks/ken_robinson_says_schools_kill_creativity']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.06.04.1
[debug] Python version 3.4.3 - Linux-4.0.5-1-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg 2.6.3, ffprobe 2.6.3, rtmpdump 2.4
[debug] Proxy map: {}
[ted] ken_robinson_says_schools_kill_creativity: Downloading webpage
[ted] ken_robinson_says_schools_kill_creativity: Extracting information
[ted] ken_robinson_says_schools_kill_creativity: Downloading m3u8 information
[debug] Invoking downloader on 'http://hls.ted.com/talks/66/video/1500k.m3u8'
[download] Destination: How schools kill creativity-66.fhls-3016.mp4
ffmpeg version 2.6.3 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.1.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-shared --enable-version3 --enable-x11grab
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 11.102 /  5. 11.102
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, hls,applehttp, from 'http://hls.ted.com/talks/66/video/1500k.m3u8':
  Duration: 00:19:21.23, start: 10.000000, bitrate: 0 kb/s
  Program 0 
    Metadata:
      variant_bitrate : 0
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
    Stream #0:1: Data: timed_id3 (ID3  / 0x20334449)
Output #0, mp4, to 'How schools kill creativity-66.fhls-3016.mp4.part':
  Metadata:
    encoder         : Lavf56.25.101
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 24 fps, 24 tbr, 90k tbn, 90k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x7ffb3f2b3080] Non-monotonous DTS in output stream 0:0; previous: 1076250, current: 0; changing to 1076251. This may result in incorrect timestamps in the output file.
[mp4 @ 0x7ffb3f2b3080] Non-monotonous DTS in output stream 0:0; previous: 1076251, current: 3000; changing to 1076252. This may result in incorrect timestamps in the output file.
[...]

This seems to happen on all TED videos, and results in skipped frames around the 11th second in at least two videos I downloaded.

[yan12125]

Looks like TED.com is serving problematic files. A workaround can be -f best:

youtube-dl --verbose -f best 'http://www.ted.com/talks/ken_robinson_says_schools_kill_creativity'