[MPlayer-dev-eng] x264 dimensions not set / float point exception

Sat Dec 25 03:06:06 CET 2010

On Fri, 24 Dec 2010 19:24:12 -0500, Joseph Miller wrote:
>On Fri, Dec 24, 2010 at 5:21 PM, compn <tempn at twmi.rr.com> wrote:
>> On Fri, 24 Dec 2010 16:44:42 -0500, Joseph Miller wrote:
>>>On Fri, Dec 24, 2010 at 4:37 PM, compn <tempn at twmi.rr.com> wrote:
>>>> On Fri, 24 Dec 2010 15:36:07 -0500, Joseph Miller wrote:
>>>>>On Fri, Dec 24, 2010 at 2:43 PM, Joseph Miller <josephcmiller2 at gmail.com> wrote:
>>>>>> On Fri, Dec 24, 2010 at 2:37 PM, Joseph Miller <josephcmiller2 at gmail.com> wrote:
>>>>>>> On Fri, Dec 24, 2010 at 2:17 PM, Joseph Miller <josephcmiller2 at gmail.com> wrote:
>>>>>>>> On Fri, Dec 24, 2010 at 1:44 PM, compn <tempn at twmi.rr.com> wrote:
>>>>>>>>> On Fri, 24 Dec 2010 10:56:34 -0500, Joseph Miller wrote:
>>>>>>>>>>On Thu, Dec 23, 2010 at 10:12 PM, compn <tempn at twmi.rr.com> wrote:
>>>>>>>>>>> On Thu, 23 Dec 2010 10:38:31 -0500, Joseph Miller wrote:
>>>>>>>>>>>>I keep getting floating point exceptions after doing the following.  I
>>>>>>>>>>>>have attached mencoder output.
>>>>>>>>>>>>
>>>>>>>>>>>>/opt/mplayer/bin/mencoder -oac faac -ovc x264 -of lavf -o
>>>>>>>>>>>>integra-reencode.mp4 integra-mp4box.mp4
>>>>>>>>>>>>/opt/mplayer/bin/mencoder -oac faac -ovc x264 -of lavf -o
>>>>>>>>>>>>integra-reencode.mp4 integra-lavf.mp4
>>>>>>>>>>>>
>>>>>>>>>>>>That last two give me Floating point exception.
>>>>>>>>>>>>
>>>>>>>>>>>>I have uploaded integra.mp4 and integra-lavf.mp4 and
>>>>>>>>>>>>integra-mp4box.mp4 to the following location:
>>>>>>>>>>>>http://www.calcmaster.net/downloads/fpx/
>>>>>>>>>>>>
>>>>>>>>>>>>I have had this happen on MP4Box files and other .mp4 files.  I'm not
>>>>>>>>>
>>>>>>>>> the problem with this bug is that its hard to reproduce. can you tell
>>>>>>>>> us what cpu you are using ?
>>>>>>>>>
>>>>>>>>> try running your mencoder on a different box, another user with the
>>>>>>>>> same fpe found he couldnt reproduce it on another box either.
>>>>>>>>>
>>>>>>>>> your samples work on my p4 1.5ghz:
>>>>>>>>>
>>>>>>>>
>>>>>>>> Interesting.  I have tried with both a PhenomII quad core and my Intel
>>>>>>>> Core i3.  I want to say that I had fewer problems with Ubuntu 10.04,
>>>>>>>> but I'm unable to verify because all my boxes are 10.10 now.  I did
>>>>>>>> try as far back as SVN 2010-01-01.
>>>>>>>>
>>>>>>>
>>>>>>> The decvideo module shows the no picture:
>>>>>>>
>>>>>>> DECVIDEO: Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
>>>>>>>  DECVIDEO: INFO: libavcodec init OK!
>>>>>>>  DECVIDEO: Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
>>>>>>>  CPLAYER: ==========================================================================
>>>>>>>  DECVIDEO: vd_ffmpeg data: 1000000, 15006467, 6e534ac, 10017b42
>>>>>>>  DECVIDEO: [h264 @ 0xd3bc60]no picture
>>>>>>> STATUSLINE: Pos:   0.0s      1f ( 6%)  0.00fps Trem:   0min   0mb
>>>>>>> A-V:0.000 [0:0]
>>>>>>>  DECVIDEO: vd_ffmpeg data: 1000000, 1019a41, 1bf22b6, 85841830
>>>>>>>  DECVIDEO: [h264 @ 0xd3bc60]no picture
>>>>>>>  MENCODER:
>>>>>>> 1 duplicate frame(s)!
>>>>>>>    MUXER: VIDEO CODEC ID: 28
>>>>>>>    MUXER: AUDIO CODEC ID: 15002, TAG: 0
>>>>>>>    MUXER: Writing header...
>>>>>>>   GLOBAL: [mp4 @ 0xcc8c40]dimensions not set
>>>>>>> Floating point exception
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> A working file produces:
>>>>>>>
>>>>>>>  DECVIDEO: Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
>>>>>>>  DECVIDEO: INFO: libavcodec init OK!
>>>>>>>  DECVIDEO: Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
>>>>>>>  CPLAYER: ==========================================================================
>>>>>>>  DECVIDEO: vd_ffmpeg data: 5061900, 24cb0a15, 3330fa13, 9cbda201
>>>>>>>  DECVIDEO: [ffmpeg] aspect_ratio: 1.315789
>>>>>>>  DECVIDEO: VDec: vo config request - 400 x 304 (preferred colorspace:
>>>>>>> Planar YV12)
>>>>>>>  DECVIDEO: Trying filter chain: expand x264
>>>>>>>  CPLAYER: Movie-Aspect is 1.32:1 - prescaling to correct movie aspect.
>>>>>>> x264 [info]: using SAR=1/1
>>>>>>> x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
>>>>>>> x264 [info]: profile High, level 2.1
>>>>>>>
>>>>>>
>>>>>> I guess I should include mplayer results too.  Here's the file that
>>>>>> won't re-encode, but the output is from mplayer (which plays the
>>>>>> file):
>>>>>>
>>>>>> DECVIDEO: Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
>>>>>>  DECVIDEO: INFO: libavcodec init OK!
>>>>>>  DECVIDEO: Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
>>>>>>  CPLAYER: ==========================================================================
>>>>>>  CPLAYER: ==========================================================================
>>>>>>  DECAUDIO: Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
>>>>>>  DECAUDIO: AUDIO: 44100 Hz, 2 ch, s16le, 48.0 kbit/3.40% (ratio: 6000->176400)
>>>>>>  DECAUDIO: Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG
>>>>>> layer-2, layer-3)
>>>>>>  CPLAYER: ==========================================================================
>>>>>>  CPLAYER: AO: [oss] 44100Hz 2ch s16le (2 bytes per sample)
>>>>>>  CPLAYER: Starting playback...
>>>>>>  DECVIDEO: vd_ffmpeg data: 1000000, 15006467, 6e534ac, 10017b42
>>>>>>  DECVIDEO: [h264 @ 0xe87760]no picture
>>>>>>  DECVIDEO: vd_ffmpeg data: 1000000, 1019a41, 1bf22b6, 85841830
>>>>>>  DECVIDEO: [h264 @ 0xe87760]no picture
>>>>>>  DECVIDEO: vd_ffmpeg data: 1000000, 1029e41, 2e7f453c, 45e08ee4
>>>>>>  DECVIDEO: [ffmpeg] aspect_ratio: 1.315789
>>>>>>  DECVIDEO: VDec: vo config request - 400 x 304 (preferred colorspace:
>>>>>> Planar YV12)
>>>>>>  DECVIDEO: Trying filter chain: vo
>>>>>>  CPLAYER: Movie-Aspect is 1.32:1 - prescaling to correct movie aspect.
>>>>>>  CPLAYER: VO: [xv] 400x304 => 400x304 Planar YV12
>>>>>>  DECVIDEO: *** [vo] Exporting mp_image_t, 400x304x12bpp YUV planar, 182400 bytes
>>>>>>  DECVIDEO: (imgfmt: 32315659, planes: (nil),(nil),(nil) strides:
>>>>>> 0,0,0, chroma: 200x152, shift: h:1,v:1)
>>>>>>
>>>>>
>>>>>OK some good news,
>>>>>-demuxer h264es seems to allow the encoding to progress for the file
>>>>>muxed with lavf, but it doesn't decode any sound.
>>>>>-demuxer h264es causes segfault with MP4Box muxed file.
>>>>
>>>> yeah i'm guessing the demuxer/'no picture' is the cause, then
>>>> the packets are passed onto mencoder lavf muxer and thats where it
>>>> dies, as it has no dimensions for the first frame and screws itself.
>>>>
>>>> does -ss 1 make it work ?
>>>>
>>>
>>>No, this doesn't work.  There is definitely something wrong with the
>>>way the demuxer reads this or something wrong with the lavf muxer that
>>>created it.  Should I be contacting ffmpeg-devel?
>>
>> well yes, michael maintains muxer_lavf but no, ffmpeg-devel is for
>> patches, and ffmpeg-user (or roundup) wants bugs to be reproduced
>> with ffmpeg. and i'm pretty sure you wont be able to crash ffmpeg
>> with this particular bug. its a bug in between the demuxers and muxers
>> in mencoder.
>>
>> if you arent doing anything with subtitles its probably a better idea
>> to just dump mencoder and use ffmpeg.
>>
>
>I thought I had the same problem with ffmpeg recently as well, but
>since you mentioned it, I went back and retried.  Seems to be working
>very well.  Now I just have to relearn all the command line options,
>haha.  But finally, encoding to aac/h264 in .mp4 container and direct
>import to Cinelerra!  Thanks for all your help.

ehe no problem, thanks for taking the time to make a bugreport with
samples. one day we'll figure out what the problem is.

(i forgot to mention that the bug you are hitting was first reported in
2008, so your checking of svn 01-01-2010 wont be able to find the
regression)

-compn