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  • ffmpeg HLS creation and segmentation results in "cannot decode" on iPad

    5 mai 2014, par jt_dylan

    I have the following code that plays on Mac Safari :

        
    
       
    
       
    
       
    

    
    <video controls="controls" width="480" height="270">
    
    
    
    <source src="http://d1ckv7o9k6o3x9.cloudfront.net/d54cfa01-eff2-4e86-946e-dc8b2ee4a7e8/media/  hls/MVI_5927.m3u8">
    
    </source></video>

    The url can be cut/pasted into the browser and works also but neither this code nor the url works in Windows Safari or iPad. Specifically on iPad I receive a cannot decode error. On Mac I have Quicktime installed so I tried that on Windows with no luck. The link that can be play on Mac is below.

    http://d1ckv7o9k6o3x9.cloudfront.net/d54cfa01-eff2-4e86-946e-dc8b2ee4a7e8/media/hls/MVI_5927.m3u8

    Browser Versions of software :
    Mac Safari : Version 7.0.3 (9537.75.14) (works)
    Windows Safari : Version 5.1.7 (7534.7.2) (doesn’t work - blank screen)
    iPad Safari : ios Version 7.1.1 (doesn’t work - cannot decode)

    Here is how I’m creating my mp4 (lgpl)
    I’m creating an mp4 with this command :
    ffmpeg -i input.mov c:v mpeg4 q:v 1 test.mp4

    I’m creating the hls using ffmpeg lpgl with this command :

    ffmpegcmd -re -y -i test.mp4 -map 0 -f segment -segment_list test.m3u8 -segment_list_flags +live -segment_time 1 -segment_list_type m3u8 test%05d.ts 2>&amp;1

    Now this works in Mac Safari with Quicktime installed but results in "cannot decode" if I try the url from ipad Safari.

    I then tried with libx264 to create the mp4 as h.264 with aac and then copy to mpeg2 container as follows :

    ffmpeg -i test.mov  -c:v libx264 -c:a libfdk_aac -preset slower -b:a 240k test.slower.mp4
    
ffmpeg -i test.slower.mp4 -vcodec copy -f mpegts -bsf h264_mp4toannexb test.slower.ts
    
ffmpeg -re -y -i test.slower.ts -map 0 -f segment -segment_list test.slower.m3u8 -segment_list_flags +live -segment_time 1 -segment_list_type m3u8 test.slower.%05d.ts

    This still produces the same results. Any idea what is wrong here ?

    Any help is much appreciated.

    Regards,
    jt_dylan

    Output from libx264 commands below :

    ffmpeg -i test.mov  -c:v libx264 -c:a libfdk_aac -preset slower -b:a 240k test.slower.mp4
    

    
ffmpeg version git-2014-05-04-aeeb3d4 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on May  4 2014 17:01:19 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
    
  configuration: --prefix=/home/ec2-user/ffmpeg_build --extra-cflags=-I/home/ec2-user/ffmpeg_build/include --extra-ldflags=-L/home/ec2-user/ffmpeg_build/lib --bindir=/home/ec2-user/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 81.100 / 52. 81.100
    
  libavcodec     55. 60.103 / 55. 60.103
    
  libavformat    55. 37.102 / 55. 37.102
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  5.100 /  4.  5.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tst/MVI_1716.MOV':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537331968
    
    compatible_brands: qt  CAEP
    
    creation_time   : 2012-07-21 05:17:44
    
  Duration: 00:00:20.06, start: 0.000000, bitrate: 34471 kb/s
    
    Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 33663 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 48k tbc (default)
    
    Metadata:
    
      creation_time   : 2012-07-21 05:17:44
    
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
    
    Metadata:
    
      creation_time   : 2012-07-21 05:17:44
    
No pixel format specified, yuvj420p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x39ae9e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
[libx264 @ 0x39ae9e0] profile High, level 5.0
    
[libx264 @ 0x39ae9e0] 264 - core 142 r2 ac76440 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=8 deblock=1:0:0 analyse=0x3:0x133 me=umh subme=9 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=60 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'tstconv/MVI_1716.slower.mp4':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537331968
    
    compatible_brands: qt  CAEP
    
    encoder         : Lavf55.37.102
    
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuvj420p, 1920x1080, q=-1--1, 24k tbn, 23.98 tbc (default)
    
    Metadata:
    
      creation_time   : 2012-07-21 05:17:44
    
    Stream #0:1(eng): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz, mono, s16, 240 kb/s (default)
    
    Metadata:
    
      creation_time   : 2012-07-21 05:17:44
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> libx264)
    
  Stream #0:1 -> #0:1 (pcm_s16le -> libfdk_aac)
    
Press [q] to stop, [?] for help
    
frame=  481 fps=1.5 q=-1.0 Lsize=   18428kB time=00:00:20.07 bitrate=7519.9kbits/s    
    
video:17827kB audio:589kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.060811%
    
[libx264 @ 0x39ae9e0] frame I:3     Avg QP:23.31  size:113718
    
[libx264 @ 0x39ae9e0] frame P:135   Avg QP:25.06  size: 56912
    
[libx264 @ 0x39ae9e0] frame B:343   Avg QP:27.13  size: 29825
    
[libx264 @ 0x39ae9e0] consecutive B-frames:  1.2%  4.2% 20.6% 74.0%
    
[libx264 @ 0x39ae9e0] mb I  I16..4: 20.0% 53.3% 26.6%
    
[libx264 @ 0x39ae9e0] mb P  I16..4:  9.7% 22.8%  5.4%  P16..4: 41.0%  8.6%  5.4%  0.1%  0.0%    skip: 7.0%
    
[libx264 @ 0x39ae9e0] mb B  I16..4:  3.3%  7.2%  2.0%  B16..8: 40.7%  9.8%  1.7%  direct: 6.3%  skip:29.0%  L0:49.6% L1:44.7% BI: 5.7%
    
[libx264 @ 0x39ae9e0] 8x8 transform intra:58.9% inter:70.2%
    
[libx264 @ 0x39ae9e0] direct mvs  spatial:99.4% temporal:0.6%
    
[libx264 @ 0x39ae9e0] coded y,uvDC,uvAC intra: 58.6% 46.9% 7.3% inter: 23.9% 20.2% 0.2%
    
[libx264 @ 0x39ae9e0] i16 v,h,dc,p: 10% 64% 14% 12%
    
[libx264 @ 0x39ae9e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 50% 10%  3%  4%  3%  8%  4% 12%
    
[libx264 @ 0x39ae9e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  4% 64%  5%  2%  3%  2%  6%  2% 10%
    
[libx264 @ 0x39ae9e0] i8c dc,h,v,p: 35% 53%  9%  3%
    
[libx264 @ 0x39ae9e0] Weighted P-Frames: Y:11.1% UV:4.4%
    
[libx264 @ 0x39ae9e0] ref P L0: 47.8% 12.2% 15.8%  6.8%  5.7%  4.2%  4.3%  2.6%  0.6%  0.0%
    
[libx264 @ 0x39ae9e0] ref B L0: 76.8% 10.5%  5.1%  2.9%  2.2%  1.5%  0.9%
    
[libx264 @ 0x39ae9e0] ref B L1: 94.6%  5.4%
    
[libx264 @ 0x39ae9e0] kb/s:7279.24
    

    
ffmpeg -i test.slower.mp4 -vcodec copy -f mpegts -bsf h264_mp4toannexb test.slower.ts
    

    
ffmpeg version git-2014-05-04-aeeb3d4 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on May  4 2014 17:01:19 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
    
  configuration: --prefix=/home/ec2-user/ffmpeg_build --extra-cflags=-I/home/ec2-user/ffmpeg_build/include --extra-ldflags=-L/home/ec2-user/ffmpeg_build/lib --bindir=/home/ec2-user/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 81.100 / 52. 81.100
    
  libavcodec     55. 60.103 / 55. 60.103
    
  libavformat    55. 37.102 / 55. 37.102
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  5.100 /  4.  5.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tstconv/MVI_1716.slower.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.37.102
    
  Duration: 00:00:20.11, start: 0.042667, bitrate: 7508 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 1920x1080, 7279 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 240 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
[swscaler @ 0x367c0c0] deprecated pixel format used, make sure you did set range correctly
    
Output #0, segment, to 'MVI_1716.slower.%05d.ts':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.37.102
    
    Stream #0:0(eng): Video: mpeg2video, yuv420p, 1920x1080, q=2-31, 200 kb/s, 90k tbn, 23.98 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: mp2, 48000 Hz, mono, s16, 384 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> mpeg2video)
    
  Stream #0:1 -> #0:1 (aac -> mp2)
    
Press [q] to stop, [?] for help
    
frame=  482 fps= 24 q=31.0 Lsize=N/A time=00:00:20.12 bitrate=N/A dup=1 drop=0    
    
video:8293kB audio:944kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 195032183209984.000000%
    
ffmpeg version git-2014-05-04-aeeb3d4 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on May  4 2014 17:01:19 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
    
  configuration: --prefix=/home/ec2-user/ffmpeg_build --extra-cflags=-I/home/ec2-user/ffmpeg_build/include --extra-ldflags=-L/home/ec2-user/ffmpeg_build/lib --bindir=/home/ec2-user/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 81.100 / 52. 81.100
    
  libavcodec     55. 60.103 / 55. 60.103
    
  libavformat    55. 37.102 / 55. 37.102
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  5.100 /  4.  5.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tstconv/MVI_1716.slower.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.37.102
    
  Duration: 00:00:20.11, start: 0.042667, bitrate: 7508 kb/s
    
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 1920x1080, 7279 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 240 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
File 'tstconv/MVI_1716.slower.ts' already exists. Overwrite ? [y/N] y
    
Output #0, mpegts, to 'tstconv/MVI_1716.slower.ts':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.37.102
    
    Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuvj420p, 1920x1080, q=2-31, 7279 kb/s, 23.98 fps, 90k tbn, 23.98 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(eng): Audio: mp2, 48000 Hz, mono, s16, 384 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (aac -> mp2)
    
Press [q] to stop, [?] for help
    
frame=  481 fps=0.0 q=-1.0 Lsize=   20334kB time=00:00:20.12 bitrate=8276.6kbits/s    
    
video:17827kB audio:944kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.325850%
    

    
ffmpeg -re -y -i test.slower.ts -map 0 -f segment -segment_list test.slower.m3u8 -segment_list_flags +live -segment_time 1 -segment_list_type m3u8 test.slower.%05d.ts
    

    
ffmpeg version git-2014-05-04-aeeb3d4 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on May  4 2014 17:01:19 with gcc 4.6.3 (GCC) 20120306 (Red Hat 4.6.3-2)
    
  configuration: --prefix=/home/ec2-user/ffmpeg_build --extra-cflags=-I/home/ec2-user/ffmpeg_build/include --extra-ldflags=-L/home/ec2-user/ffmpeg_build/lib --bindir=/home/ec2-user/bin --extra-libs=-ldl --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
    
  libavutil      52. 81.100 / 52. 81.100
    
  libavcodec     55. 60.103 / 55. 60.103
    
  libavformat    55. 37.102 / 55. 37.102
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  5.100 /  4.  5.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 18.100 /  0. 18.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mpegts, from 'tstconv/MVI_1716.slower.ts':
    
  Duration: 00:00:20.11, start: 1.430733, bitrate: 8282 kb/s
    
  Program 1 
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuvj420p(pc), 1920x1080, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
    
    Stream #0:1[0x101](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, s16p, 373 kb/s
    
[swscaler @ 0x1fe9ae0] deprecated pixel format used, make sure you did set range correctly
    
    Output #0, segment, to 'MVI_1716.slower.%05d.ts':
    
      Metadata:
    
        encoder         : Lavf55.37.102
    
        Stream #0:0: Video: mpeg2video, yuv420p, 1920x1080, q=2-31, 200 kb/s, 90k tbn, 23.98 tbc
    
        Stream #0:1(eng): Audio: mp2, 48000 Hz, mono, s16, 384 kb/s
    
    Stream mapping:
    
      Stream #0:0 -> #0:0 (h264 -> mpeg2video)
    
      Stream #0:1 -> #0:1 (mp2 -> mp2)

  • avconv complains "non monotonically increasing dts to muxer in stream" when piping from libx264 on 14.04

    1er décembre 2015, par Mike

    I have a piece of code that takes a stream of images and writes them to a file using x264 to encode and avconv. The relevant bits are as follows

    // Setup encoder
    
sprintf(cmd, "avconv -i pipe: -vcodec copy %s", filename);
    
fp = popen(cmd, "w");
    
x264_param_default_preset(&amp;params, "ultrafast", "stillimage,zerolatency");
    
params.i_fps_num = fps;
    
params.i_fps_den = 1;
    
x264_picture_alloc(&amp;in, X264_CSP_I420, width, height);
    
params.i_csp = X264_CSP_I420;
    
in.img.i_csp = X264_CSP_I420;
    
x.params.b_vfr_input = 0;
    
in.i_pts = -1;
    
out.i_pts = -1;
    
params.i_width = width;
    
params.i_height = height;
    
encoder = x264_encoder_open(&amp;params);
    

    
in.img.i_plane = 1;
    
in.img.i_stride[0] = width;
    
ret = x264_encoder_headers(encoder, &amp;nals, &amp;nheader);
    
header_size = nals[0].i_payload + nals[1].i_payload + nals[2].i_payload;
    
fwrite(nals[0].p_payload, header_size, 1, fp);
    

    
...
    
// Loop body
    
++in.i_pts;
    
frame_size = x264_encoder_encode(encoder, &amp;nals, &amp;num_nals, &amp;in, &amp;out);
    
fwrite(nals[0].p_payload, frame_size, 1, fp);

    I’ve left out error checking for clarity, but no error is ever returned. Indeed, until I upgraded my system to 14.04, this code worked perfectly (and continues to work perfectly for colleagues who’ve yet to upgrade).

    Only now running Ubuntu 14.04, I get this output from avconv

    [h264 @ 0x98dec0] Estimating duration from bitrate, this may be inaccurate
    
Input #0, h264, from 'pipe:'
    
  Duration: N/A, bitrate: N/A
    
    Stream #0.0: Video: h264 (Constrained Baseline), yuv420p, 640x480, 25 fps, 25 tbr, 25 tbn, 60 tbc
    
Output #0, mp4, to '../reel/test.mp4':
    
  Metadata:
    
    encoder         : Lavf54.20.3
    
    Stream #0.0: Video: libx264, yuv420p, 640x480, q=2-31, 25 tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
[mp4 @ 0x1347800] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 2 >= 2
    
av_interleaved_write_frame(): Invalid argument

    Despite the error, out.i_dts does monotonically increase over the whole duration of the video (it’s always equal to in.i_pts).

    My general assumption is that newer versions of avconv are more strict with the parameters of the input stream, so while my choice of parameters may have worked before, they do not work now.

    Another curiousity, which might be related, is avconv detecting that the stream is 25 FPS, even though x264 is configured with an input FPS of 30.

    Edit : Some further information, the same dts error (2>=2) happens regardless of the initial pts (with the output dts matching as expected).

  • Core : Update elementValue method to deal with type="number" fields

    29 avril 2014, par jamierytlewski
    Core : Update elementValue method to deal with type="number" fields

    The HTML5 draft defines, for type="number" inputs : "The value
    
sanitization algorithm is as follows : If the value of the element is not
    
a valid floating-point number, then set it to the empty string instead."
    
If the constraint validation considers the input invalid, return false
    
as the value, instead of the empty string, for the number and digit
    
methods to output their messages.
    

    This would break in browsers that support type="number", but not the
    
constraint validation API. I don’t know of any existing browser where
    
that applies.
    

    Fixes #858
    
Fixes #922
    
Closes #1093

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