New submission from Bram Avontuur <b...@longtailvideo.com>:

While trying to transcode a customer-uploaded mp4 file, ffmpeg spends 
several hours encoding before exiting on an error status. I'd provide a 
sample video, but it might be sensitive data and cutting up the video 
using dd doesn't produce anything ffmpeg groks so I hope the following 
information will do.

Command line: ffmpeg -i input.mp4 -vcodec libx264 -vpre fast -vpre 
baseline -acodec libfaac -ac 2 -ar 44100 -ab 112k /tmp/dummy.mp4

ffmpeg verbose output:

ffmpeg -v 9 -loglevel 99 -i input.mp4
                                                                                
           
FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
  built on Feb 18 2011 14:59:58 with gcc 4.3.2
  configuration: --enable-gpl --enable-version3 --enable-nonfree --
enable-pthreads --enable-libopencore-amrnb --enable-libopencore-amrwb --
enable-libfaac --enable-libgsm --enable-libmp3lame --enable-libx264 --
enable-libvorbis --enable-libtheora --enable-avfilter --
prefix=/home/botr/botr/opt/encoder.new --extra-cflags='-I 
/home/botr/botr/opt/encoder.new/include' --extra-ldflags='-L 
/home/botr/botr/opt/encoder.new/lib' --arch=x86_32 --enable-runtime-
cpudetect --disable-ffplay --disable-ffserver --disable-ffprobe --
disable-doc --enable-libvpx
  libavutil     50.36. 0 / 50.36. 0
  libavcore      0.16. 1 /  0.16. 1
  libavcodec    52.108. 0 / 52.108. 0
  libavformat   52.93. 0 / 52.93. 0
  libavdevice   52. 2. 3 / 52. 2. 3
  libavfilter    1.74. 0 /  1.74. 0
  libswscale     0.12. 0 /  0.12. 0
[NULL @ 0x8e42cc0] Probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8e42cc0] ISO: File Type Major Brand: mp42
[h264 @ 0x8e458c0] no picture
    Last message repeated 1 times
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8e42cc0] max_analyze_duration reached

Seems stream 0 codec frame rate differs from container frame rate: 
180000.00 (180000/1) -> 90000.00 (180000/2)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isomavc1
    creation_time   : 2011-02-10 04:18:27
    encoder         : HandBrake 0.9.5 2011010300
  Duration: 00:14:23.76, start: 0.000000, bitrate: 929 kb/s
    Chapter #0.0: start -0.083411, end 357.857500
    Metadata:
      title           : Chapter 1
    Chapter #0.1: start 357.857500, end 863.721156
    Metadata:
      title           : Chapter 2
    Stream #0.0(und), 117, 1/90000: Video: h264, yuv420p, 720x480 [PAR 
32:27 DAR 16:9], 1/180000, 763 kb/s, 23.98 fps, 90k tbr, 90k tbn, 180k 
tbc
    Metadata:
      creation_time   : 2011-02-10 04:18:27
    Stream #0.1(und), 237, 1/48000: Audio: aac, 48000 Hz, stereo, s16, 
159 kb/s
    Metadata:
      creation_time   : 2011-02-10 04:18:27
    Stream #0.2(und), 0, 1/90000: Subtitle: text / 0x74786574
    Metadata:
      creation_time   : 2011-02-10 04:18:27
At least one output file must be specified


mediainfo output:

General
Complete name                    : kuVogmqu.mp4
Format                           : MPEG-4
Format profile                   : Base Media / Version 2
Codec ID                         : mp42
File size                        : 95.7 MiB
Duration                         : 14mn 23s
Overall bit rate                 : 929 Kbps
Encoded date                     : UTC 2011-02-10 04:18:27
Tagged date                      : UTC 2011-02-10 04:59:49
Writing application              : HandBrake 0.9.5 2011010300

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L3.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 4 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 14mn 23s
Duration_LastFrame               : 2mn 27s
Bit rate mode                    : Variable
Bit rate                         : 764 Kbps
Width                            : 720 pixels
Height                           : 480 pixels
Display aspect ratio             : 16:9
Original display aspect ratio    : 16:9
Frame rate mode                  : Variable
Frame rate                       : 23.976 fps
Minimum frame rate               : 19.965 fps
Maximum frame rate               : 29.970 fps
Standard                         : NTSC
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.092
Stream size                      : 78.7 MiB (82%)   
Writing library                  : x264 core 112
Encoding settings                : cabac=1 / ref=2 / deblock=1:0:0 / 
analyse=0x1:0x111 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / 
mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / 
deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=1 / 
sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / 
constrained_intra=0 / bframes=2 / b_pyramid=2 / b_adapt=1 / b_bias=0 / 
direct=1 / weightb=0 / open_gop=0 / weightp=2 / keyint=240 / 
keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf 
/ mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=3 / qpmax=51 / qpstep=4 / 
ip_ratio=1.40 / aq=1:1.00
Encoded date                     : UTC 2011-02-10 04:18:27
Tagged date                      : UTC 2011-02-10 04:59:49
Color primaries                  : BT.601-6 525, BT.1358 525, BT.1700 
NTSC, SMPTE 170M
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.601-6 525, BT.1358 525, BT.1700 
NTSC, SMPTE 170M

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Codec ID                         : 40
Duration                         : 14mn 23s
Bit rate mode                    : Variable
Bit rate                         : 160 Kbps
Maximum bit rate                 : 295 Kbps
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 48.0 KHz
Compression mode                 : Lossy
Stream size                      : 16.4 MiB (17%)   
Encoded date                     : UTC 2011-02-10 04:18:27
Tagged date                      : UTC 2011-02-10 04:59:48

Text
ID                               : 3
Format                           : Apple text
Codec ID                         : text
Duration                         : 14mn 23s
Bit rate mode                    : Constant
Bit rate                         : 0
Stream size                      : 46.0 Bytes (0%)  
Encoded date                     : UTC 2011-02-10 04:18:27
Tagged date                      : UTC 2011-02-10 04:59:49

----------
messages: 13720
priority: normal
status: new
substatus: new
title: ffmpeg stalls and finally fails on handbrake-generated mp4
type: bug

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