I was trying to convert what I believe to be a valid AC3 file I
demuxed out of a matroska file. I believe it is valid since it plays
just fine in VLC and in windows media player classic using ffdshow. I
would attach the ac3 but it is 54 megs. I was wondering if this is a
known bug in mplayer/mencoder or if anybody else has experienced this
issue? Here is the output from mplayer.
>> mplayer "the.big.bang.theory.s01e14.720p.hdtv.x264-ctu.ac3"
MPlayer 1.0rc2-4.2.1 (C) 2000-2007 MPlayer Team
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ (Family: 15, Model: 43, Step
ping: 1)
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
Playing C:\the.big.bang.theory.s01e14.720p.hdtv.x264-ctu_convert\the.big.bang.theory.s01e14.720p.hdtv.x264-ctu.ac3
.
libavformat file format detected.
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 32 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Video: mpeg2video)
[mpeg @ 00E1E768]Could not find codec parameters (Video: mpeg1video, 1195x1092,
78579 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 224 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 80 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 96 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 32 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 128 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 48 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 80 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Video: mpeg1video, 2939x3081,
12960 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 128 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 80 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 224 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 96 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 80 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 56 kb/s)
[mpeg @ 00E1E768]Could not find codec parameters (Video: mpeg2video)
[mpeg @ 00E1E768]Could not find codec parameters (Video: mpeg2video)
[mpeg @ 00E1E768]Could not find codec parameters (Audio: mp2, 320 kb/s)
LAVF_header: av_find_stream_info() failed
MPEG-PES file format detected.
MPEG: FATAL: EOF while searching for sequence header.
Video: Cannot read properties.
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
ADecoder init failed :(
ADecoder init failed :(
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
Unknown/missing audio format -> no sound
ADecoder init failed :(
Opening audio decoder: [libmad] libmad mpeg audio decoder
Cannot sync MAD frame
ADecoder init failed :(
ADecoder init failed :(
Opening audio decoder: [hwmpa] MPEG audio pass-through (fake decoder)
Cannot sync MPA frame: 0
ADecoder init failed :(
ADecoder init failed :(
Cannot find codec for audio format 0x50.
Read DOCS/HTML/en/codecs.html!
Audio: no sound
Video: no video
Exiting... (End of file)
The file information from the AC3 parser filter for media player
classic is here if that helps anyone:
- Connection media type:
Audio: Dolby AC3 48000Hz 6ch 384Kbps
AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_DOLBY_AC3 {E06D802C-DB46-11CF-B4D1-00805F6CBBEA}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 1
cbFormat: 18
WAVEFORMATEX:
wFormatTag: 0x0000
nChannels: 6
nSamplesPerSec: 48000
nAvgBytesPerSec: 48000
nBlockAlign: 1536
wBitsPerSample: 0
cbSize: 0 (extra bytes)
And the information from the original matroska file using mkvinfo is here:
>>mkvinfo "the.big.bang.theory.s01e14.720p.hdtv.x264-ctu.mkv"
+ EBML head
|+ Doc type: matroska
|+ Doc type version: 1
|+ Doc type read version: 1
+ Segment, size 586014961
|+ Seek head (subentries will be skipped)
|+ EbmlVoid (size: 4027)
|+ Segment information
| + Timecode scale: 1000000
| + Muxing application: libebml v0.7.7 + libmatroska v0.8.1
| + Writing application: mkvmerge v2.0.2 ('You're My Flame') built on Sep 20 200
7 09:25:45
| + Duration: 1181.600s (00:19:41.600000000)
| + Date: Tue Apr 29 01:23:53 2008 UTC
| + Segment UID: 0xec 0x71 0x83 0xea 0x2f 0xe9 0x33 0xc0 0x7d 0x38 0x66 0x06 0xc
c 0x91 0x3f 0x14
|+ Segment tracks
| + A track
| + Track number: 1
| + Track UID: 3668660603
| + Track type: audio
| + Enabled: 1
| + Default flag: 1
| + Forced flag: 0
| + Lacing flag: 1
| + MinCache: 0
| + Timecode scale: 1.000000
| + Max BlockAddition ID: 0
| + Codec ID: A_AC3
| + Codec decode all: 1
| + Default duration: 32.000ms (31.250 fps for a video track)
| + Language: und
| + Audio track
| + Sampling frequency: 48000.000000
| + Channels: 6
| + A track
| + Track number: 2
| + Track UID: 1
| + Track type: video
| + Enabled: 1
| + Default flag: 1
| + Forced flag: 0
| + Lacing flag: 0
| + MinCache: 1
| + Timecode scale: 1.000000
| + Max BlockAddition ID: 0
| + Codec ID: V_MPEG4/ISO/AVC
| + Codec decode all: 1
| + CodecPrivate, length 39
| + Default duration: 41.708ms (23.976 fps for a video track)
| + Language: eng
| + Video track
| + Pixel width: 1280
| + Pixel height: 720
| + Interlaced: 0
| + Display width: 16
| + Display height: 9
|+ EbmlVoid (size: 1024)
|+ Cluster
If anybody has stumbled across this problem before, I would be happy
to know about it. Any help is appreciated. If I've posted this to the
wrong list, than I apologize.
Thanks,
Justin
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