[MEncoder-users] mencoder giving up because of too many audio packets?

[Grant Edwards]

I'm using mencoder to transcode the audio in ATSC program
streams from A52 to MPEG3. About half the time, mencoder will
quit about half way through the file. Here's an example of a
two-hour recorded ATSC program stream that ends up being one
hour long:

Input file:

    -rw-r--r-- 1 mythtv mythtv 3322572128 Jun 11 04:00 /myth/tv/2021_20070611020000.mpg

Output file:

    -rw-r--r-- 1 mythtv mythtv 1538048000 Jun 11 04:03 /myth/tmp/convert350.4706.tmp

The output file should be roughly the same size as the input
file (the video isn't being changed, just the audio).
    
Mencoder run:    

    mencoder -quiet -noskip -of mpeg -mpegopts format=dvd:tsaf -oac lavc -ovc copy -lavcopts acodec=mp2:abitrate=256 -fps 30000/1001 -ofps 30000/1001 -vc mpeg12 -o /myth/tmp/convert350.4706.tmp /myth/tv/2021_20070611020000.mpg
    MEncoder 1.0rc1-4.1.2 (C) 2000-2006 MPlayer Team
    CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (Family: 15, Model: 2, Stepping: 9)
    CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
    Compiled with runtime CPU detection.
    
    WARNING: OUTPUT FILE FORMAT IS _MPEG_. See -of help.
    success: format: 0  data: 0x0 - 0xc60a6d60
    TS file format detected.
    VIDEO MPEG2(pid=65) AUDIO A52(pid=68) NO SUBS (yet)!  PROGRAM N. 1
    VIDEO:  MPEG2  704x480  (aspect 2)  29.970 fps  15000.0 kbps (1875.0 kbyte/s)
    [V] filefmt:29  fourcc:0x10000002  size:704x480  fps:29.97  ftime:=0.0334
    Input fps will be interpreted as 29.97 instead.
    ==========================================================================
    Opening audio decoder: [liba52] AC3 decoding with liba52
    Using SSE optimized IMDCT transform
    Using MMX optimized resampler
    AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
    Selected audio codec: [a52] afm: liba52 (AC3-liba52)
    ==========================================================================
    PACKET SIZE: 2048 bytes, deltascr: 43885
    videocodec: framecopy (704x480 24bpp fourcc=10000002)
    Limiting audio preload to 0.4s.
    Increasing audio density to 4.
    Writing header...
    INITV: 0.200, 0.167, fps: 29.970
    a52: CRC check failed!
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    a52: CRC check failed!
    a52: error at resampling
    
    Too many audio packets in the buffer: (2185 in 8390400 bytes).
    Maybe you are playing a non-interleaved stream/file or the codec failed?
    For AVI files, try to force non-interleaved mode with the -ni option.
    
    Too many audio packets in the buffer: (2185 in 8390400 bytes).
    Maybe you are playing a non-interleaved stream/file or the codec failed?
    For AVI files, try to force non-interleaved mode with the -ni option.
    Writing index...
    
    Overhead: 1.762% (26635440 / 1511412560)
    Writing header...
    
    Video stream: 3187.144 kbit/s  (398393 B/s)  size: 1537287884 bytes  3858.722 secs  115648 frames

    Audio stream:  256.000 kbit/s  (31999 B/s)  size: 123492096 bytes  3859.128 secs



For some recordings the transcoding does finish OK.  In all
cases there are the "a52: CRC check failed!" and "a52: error at
resampling".

The "Too many audio packets" error only shows up when the
transcoding fails, and it's always the last thing before the
"Writing index..." message.

What can I do to get mencoder to finish transcoding the file?

-- 
Grant Edwards                   grante             Yow!  Okay... I'm going
                                  at               home to write the "I HATE
                               visi.com            RUBIK's CUBE HANDBOOK FOR
                                                   DEAD CAT LOVERS"...