[FFmpeg-user] LATM demuxer

Andy Furniss adf.lists at gmail.com
Tue Oct 31 17:48:37 EET 2017 

Andy Furniss wrote:
> Sometime this year I thought I saw mention of ffmpeg and a LATM 
> standalone demuxer. I may mis-recall/ may have misread, does anyone
> know anything about this?
> 
> The reason I would need it is that currently feeding latm to decode
> with fdk seems impossible.
> 
> Re-coding seems to lose the normal drc and the dvb (drc and mixdown) 
> meta that fdk seems to have options to handle.
> 
> In the absence of being able to do -c:a copy = the AAC re-coding
> case. Is there is a way not to loose meta data?
> 
> TIA

Hmm, it's years since I looked at this last and then IIRC it was stated
that fdk lib didn't do latm.
Looking at latest git there are files named like it possibly does now.

Whatever, it doesn't work, so here's some output working without then
failing with libfdk_aac.

ffmpeg -i ~/bp-part-c1.ts -f null -
ffmpeg version N-88204-g7f9de7b Copyright (c) 2000-2017 the FFmpeg 
developers
   built with gcc 5.3.0 (GCC)
   configuration: --prefix=/usr --disable-doc --enable-gpl 
--enable-nonfree --enable-libvpx --enable-libx265 --enable-libx264 
--enable-gnutls --enable-libdrm --enable-libfreetype --enable-libfdk-aac
   libavutil      56.  0.100 / 56.  0.100
   libavcodec     58.  0.101 / 58.  0.101
   libavformat    58.  0.101 / 58.  0.101
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  0.100 /  7.  0.100
   libswscale      5.  0.100 /  5.  0.100
   libswresample   3.  0.100 /  3.  0.100
   libpostproc    55.  0.100 / 55.  0.100
[h264 @ 0x389cc80] mmco: unref short failure
     Last message repeated 1 times
[mpegts @ 0x38983a0] PES packet size mismatch
Input #0, mpegts, from '/home/andy/bp-part-c1.ts':
   Duration: 00:24:18.20, start: 68053.963267, bitrate: 6403 kb/s
   Program 17540
     Metadata:
       service_name    : BBC ONE HD
       service_provider:
     Stream #0:0[0x19c9]: Video: h264 (High) ([27][0][0][0] / 0x001B), 
yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 
25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x19ca](eng): Audio: aac_latm (LC) ([17][0][0][0] / 
0x0011), 48000 Hz, 5.1, fltp
     Stream #0:2[0x19ce](eng): Audio: aac_latm (HE-AACv2) ([17][0][0][0] 
/ 0x0011), 48000 Hz, stereo, fltp
     Stream #0:3[0x19cd](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 
0x0006)
Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
   Stream #0:1 -> #0:1 (aac_latm (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[h264 @ 0x38cd2c0] mmco: unref short failure
[h264 @ 0x391f660] mmco: unref short failure
Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf58.0.101
     Stream #0:0: Video: wrapped_avframe, yuv420p, 1920x1080 [SAR 1:1 
DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.0.101 wrapped_avframe
     Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, 5.1, s16, 4608 kb/s
     Metadata:
       encoder         : Lavc58.0.101 pcm_s16le
frame=  936 fps=267 q=-0.0 Lsize=N/A time=00:00:38.84 bitrate=N/A 
speed=11.1x
video:483kB audio:21492kB subtitle:0kB other streams:0kB global 
headers:0kB muxing overhead: unknown



ffmpeg -c:a libfdk_aac -i ~/bp-part-c1.ts -f null -
ffmpeg version N-88204-g7f9de7b Copyright (c) 2000-2017 the FFmpeg 
developers
   built with gcc 5.3.0 (GCC)
   configuration: --prefix=/usr --disable-doc --enable-gpl 
--enable-nonfree --enable-libvpx --enable-libx265 --enable-libx264 
--enable-gnutls --enable-libdrm --enable-libfreetype --enable-libfdk-aac
   libavutil      56.  0.100 / 56.  0.100
   libavcodec     58.  0.101 / 58.  0.101
   libavformat    58.  0.101 / 58.  0.101
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  0.100 /  7.  0.100
   libswscale      5.  0.100 /  5.  0.100
   libswresample   3.  0.100 /  3.  0.100
   libpostproc    55.  0.100 / 55.  0.100
[h264 @ 0x2d73c80] mmco: unref short failure
     Last message repeated 1 times
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4007
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4006
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 400a
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4006
     Last message repeated 1 times
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
     Last message repeated 1 times
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] Multiple frames in a packet.
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4007
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4007
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4007
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4004
     Last message repeated 1 times
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4006
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
     Last message repeated 2 times
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 400a
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 1001
[libfdk_aac @ 0x2d74d80] aacDecoder_DecodeFrame() failed: 4002
[mpegts @ 0x2d6f3a0] decoding for stream 1 failed
[mpegts @ 0x2d6f3a0] decoding for stream 2 failed
[mpegts @ 0x2d6f3a0] PES packet size mismatch
[mpegts @ 0x2d6f3a0] Could not find codec parameters for stream 1 
(Audio: aac ([17][0][0][0] / 0x0011), 0 channels, s16, 790 kb/s): 
unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' 
options
[mpegts @ 0x2d6f3a0] Could not find codec parameters for stream 2 
(Audio: aac ([17][0][0][0] / 0x0011), 0 channels, s16, 106 kb/s): 
unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' 
options
Input #0, mpegts, from '/home/andy/bp-part-c1.ts':
   Duration: 00:24:18.20, start: 68053.963267, bitrate: 6403 kb/s
   Program 17540
     Metadata:
       service_name    : BBC ONE HD
       service_provider:
     Stream #0:0[0x19c9]: Video: h264 (High) ([27][0][0][0] / 0x001B), 
yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 
25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x19ca](eng): Audio: aac ([17][0][0][0] / 0x0011), 0 
channels, s16, 790 kb/s
     Stream #0:2[0x19ce](eng): Audio: aac ([17][0][0][0] / 0x0011), 0 
channels, s16, 106 kb/s
     Stream #0:3[0x19cd](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 
0x0006)
Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))
   Stream #0:1 -> #0:1 (aac (libfdk_aac) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[libfdk_aac @ 0x2dbfc60] Sample rate 0 invalid
Error while processing the decoded data for stream #0:1
Conversion failed!

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