[FFmpeg-user] corrupted mp4 encoded from images sent from a pipe

[pablo platt]

Hi,

I'm encoding mp4 from images sent from phantomjs over a pipe.
The mp4 is corrupted and doesn't play in FF and Chrome.
After repairing it, it plays fine.

Is it possible that phantomjs doesn't gracefully ends the stream?
At the end I'm getting an error:
pipe:: Input/output error

This explains how to send images from phantomjs to stdout:
https://groups.google.com/forum/#!topic/phantomjs/wluVGGjhL90

Command used to create the mp4:
./phantomjs test.js | ./ffmpeg -y -c:v png -f image2pipe -r 10 -i - -c:v
libx264 -pix_fmt yuv420p test.mp4

Command used to fix the corrupted mp4:
./ffmpeg -i corrupted.mp4 -c copy repaired.mp4

More info is listed below.

Thanks

phantomjs test.js
--------------------------------------------------
var page = require('webpage').create();

page.clipRect = { top: 0, left: 0, width: 900, height: 800};
page.viewportSize = { width: 900, height: 800};

var url = 'http://dl.dropbox.com/u/621993/voronoi/voronoi.html';
var frames = 100;

page.open(url, function(){
    setInterval(function(){
        page.render('/dev/stdout');

        if( frames == 0 ){
            phantom.exit();
        }

        frames--;

    }, 100);
});


ffmpeg console output
----------------------------------------------------------------
./phantomjs test.js | ./ffmpeg -y -c:v png -f image2pipe -r 10 -i - -c:v
libx264 -pix_fmt yuv420p -movflags +faststart test.mp4
ffmpeg version 2.1-static Copyright (c) 2000-2013 the FFmpeg developers
  built on Dec  9 2013 23:45:24 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --prefix=/home/user/ffmpeg-static/target
--extra-cflags='-I/home/user/ffmpeg-static/target/include -static'
--extra-ldflags='-L/home/user/ffmpeg-static/target/lib -lm -static'
--extra-version=static --disable-debug --disable-shared --enable-static
--extra-cflags=--static --disable-ffplay --disable-ffserver --disable-doc
--enable-gpl --enable-pthreads --enable-postproc --enable-gray
--enable-runtime-cpudetect --enable-libfaac --enable-libmp3lame
--enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
--enable-bzlib --enable-zlib --enable-nonfree --enable-version3
--enable-libvpx --disable-devices
  libavutil      52. 48.100 / 52. 48.100
  libavcodec     55. 39.100 / 55. 39.100
  libavformat    55. 19.104 / 55. 19.104
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.100 /  3. 90.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, image2pipe, from 'pipe:':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: png, rgba, 900x800 [SAR 2835:2835 DAR 9:8], 10 fps,
10 tbr, 10 tbn, 10 tbc
[libx264 @ 0x9bf1320] using SAR=1/1
[libx264 @ 0x9bf1320] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
[libx264 @ 0x9bf1320] profile High, level 3.1
[libx264 @ 0x9bf1320] 264 - core 140 - H.264/MPEG-4 AVC codec - Copyleft
2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11
fast_pskip=1 chroma_qp_offset=-2 threads=1 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=1 b_bias=0 direct=1
weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=10 scenecut=40
intra_refresh=0 rc_lookahead=40 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 'test.mp4':
  Metadata:
    encoder         : Lavf55.19.104
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
900x800 [SAR 1:1 DAR 9:8], q=-1--1, 10240 tbn, 10 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png -> libx264)
pipe:: Input/output error0 size=    1678kB time=00:00:05.70
bitrate=2411.5kbits/s
[mp4 @ 0x9bf0e00] Starting second pass: moving the moov atom to the
beginning of the file
frame=  101 fps=3.2 q=25.0 Lsize=    2562kB time=00:00:09.90
bitrate=2119.6kbits/s
video:2560kB audio:0kB subtitle:0 global headers:0kB muxing overhead
0.074206%
[libx264 @ 0x9bf1320] frame I:1     Avg QP:21.38  size:  5004
[libx264 @ 0x9bf1320] frame P:57    Avg QP:20.14  size: 37283
[libx264 @ 0x9bf1320] frame B:43    Avg QP:26.23  size: 11400
[libx264 @ 0x9bf1320] consecutive B-frames: 14.9% 85.1%  0.0%  0.0%
[libx264 @ 0x9bf1320] mb I  I16..4: 18.0% 80.1%  2.0%
[libx264 @ 0x9bf1320] mb P  I16..4:  5.6%  4.7%  2.7%  P16..4: 16.1% 16.4%
17.0%  0.0%  0.0%    skip:37.5%
[libx264 @ 0x9bf1320] mb B  I16..4:  0.2%  0.3%  0.4%  B16..8: 24.3% 13.8%
6.8%  direct: 5.1%  skip:49.1%  L0:33.0% L1:39.4% BI:27.6%
[libx264 @ 0x9bf1320] 8x8 transform intra:40.8% inter:26.6%
[libx264 @ 0x9bf1320] coded y,uvDC,uvAC intra: 18.8% 31.2% 24.8% inter:
16.3% 26.1% 20.0%
[libx264 @ 0x9bf1320] i16 v,h,dc,p: 71% 22%  7%  0%
[libx264 @ 0x9bf1320] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 23% 62%  1%  1%
1%  1%  1%  1%
[libx264 @ 0x9bf1320] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 17% 27%  5%  7%
7%  6%  5%  4%
[libx264 @ 0x9bf1320] i8c dc,h,v,p: 69% 18% 12%  2%
[libx264 @ 0x9bf1320] Weighted P-Frames: Y:8.8% UV:7.0%
[libx264 @ 0x9bf1320] ref P L0: 62.1% 11.6% 18.2%  7.9%  0.2%
[libx264 @ 0x9bf1320] ref B L0: 83.5% 16.5%
[libx264 @ 0x9bf1320] kb/s:2075.53