[FFmpeg-user] aac: Prediction is not allowed in AAC-LC.

[shirish शिरीष]

at bottom :-

On 30/12/2018, Paul B Mahol <onemda at gmail.com> wrote:
> On 12/30/18, shirish शिरीष <shirishag75 at gmail.com> wrote:
>> at bottom :-
>>
>> On 28/12/2018, shirish शिरीष <shirishag75 at gmail.com> wrote:
>>> Dear Friends,
>>>
>>> Thank you for continuing to maintain this awesome free software
>>> multimedia stack. Please CC me in case somebody responds as I am
>>> unable to process mailing lists, just too much spam :(
>>>
>>
>> Hi all,
>>
>> It seems I didn't read
>> http://ffmpeg.org/pipermail/ffmpeg-user/2018-December/042569.html
>> properly -
>>
>
> Does it happen when seeking or?
>

I actually played the media file through ffplay and for sure it seems
there is an issue there -

$ ffplay Bandit\ Bashing\ –\ Kenshi\ Gameplay\ –\ Let\'s\ Play\ Part\
2-9Jomgc8Ui0E.mp4
ffplay version 4.1-1 Copyright (c) 2003-2018 the FFmpeg developers
  built with gcc 8 (Debian 8.2.0-12)
  configuration: --prefix=/usr --extra-version=1 --toolchain=hardened
--libdir=/usr/lib/x86_64-linux-gnu
--incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl
--disable-stripping --enable-avresample --disable-filter=resample
--enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
--enable-libcdio --enable-libcodec2 --enable-libflite
--enable-libfontconfig --enable-libfreetype --enable-libfribidi
--enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame
--enable-libmysofa --enable-libopenjpeg --enable-libopenmpt
--enable-libopus --enable-libpulse --enable-librsvg
--enable-librubberband --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora
--enable-libtwolame --enable-libvidstab --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265
--enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi
--enable-lv2 --enable-omx --enable-openal --enable-opengl
--enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883
--enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Bandit Bashing – Kenshi
Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2018-12-27T09:21:24.000000Z
  Duration: 01:16:20.51, start: 0.000000, bitrate: 990 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661),
yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 859 kb/s, 30 fps, 30
tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      creation_time   : 2018-12-27T09:21:24.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created
on: 12/27/2018.
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2018-12-27T09:21:24.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created
on: 12/27/2018.
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking
Bandit Bashing – Kenshi Gameplay – Let's Play Part 2-9Jomgc8Ui0E.mp4:
error while seeking

So while I don't know the reason why there is an error while seeking,
it lies either in the media file itself or something in ffplay. Have
no clue which/where.

The error starts appearing around half-way mark in the media file.

I wish there was a way to check integrity of the mediafile. I did use
mediainfo and it has a constant frame rate. I was wondering if there
is a variable frame-rate which might be causing this error but that
doesn't seem to be it :(

I am non-plussed as to what to do now.

-- 
          Regards,
          Shirish Agarwal  शिरीष अग्रवाल
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