[FFmpeg-user] problem transcoding raw g729 to wav format

Fri Sep 29 16:55:30 EEST 2017

>> On Sep 28, 2017, at 5:52 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:

>> Does it work if you use file input?

>> Carl Eugen

Hmm, well in my latest testing I am getting a good wave file generated — both when I test using streams or files.  So perhaps my only concern is the warnings about "Non-monotonous DTS in output stream..”

What is this trying to tell me?  Is this something I can safely ignore, or should I look into addressing it somehow?

Here is the output when I run from files...

ffmpeg  -loglevel debug -y -acodec g729 -f g729 -i caller.raw -ar 44100 -acodec pcm_s32le -f wav caller.wav

 version N-87326-g3ffd3b7 Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 7.3.0 (clang-703.0.29)
  configuration: --enable-gpl --enable-nonfree --enable-libopus --enable-libspeex --enable-libvpx --enable-libmp3lame --disable-optimizations --disable-stripping --extra-cflags='-DDEBUG -O0 -g'
  libavutil      55. 75.100 / 55. 75.100
  libavcodec     57.106.101 / 57.106.101
  libavformat    57. 82.100 / 57. 82.100
  libavdevice    57.  8.101 / 57.  8.101
  libavfilter     6.105.100 /  6.105.100
  libswscale      4.  7.103 /  4.  7.103
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'g729'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'g729'.
Reading option '-i' ... matched as input url with argument 'caller.raw'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '44100'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'pcm_s32le'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'wav'.
Reading option 'caller.wav' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url caller.raw.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument g729.
Applying option f (force format) with argument g729.
Successfully parsed a group of options.
Opening an input file: caller.raw.
[g729 @ 0x7fd079010600] Opening 'caller.raw' for reading
[file @ 0x7fd078c15720] Setting default whitelist 'file,crypto'
[g729 @ 0x7fd079010600] Before avformat_find_stream_info() pos: 0 bytes read:20480 seeks:0 nb_streams:1
[g729 @ 0x7fd079010600] All info found
[g729 @ 0x7fd079010600] Estimating duration from bitrate, this may be inaccurate
[g729 @ 0x7fd079010600] After avformat_find_stream_info() pos: 10 bytes read:20480 seeks:0 frames:1
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, g729, from 'caller.raw':
  Duration: 00:00:20.48, start: 0.000000, bitrate: 8 kb/s
    Stream #0:0, 1, 1/8000: Audio: g729, 8000 Hz, mono, s16
Successfully opened the file.
Parsing a group of options: output url caller.wav.
Applying option ar (set audio sampling rate (in Hz)) with argument 44100.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument pcm_s32le.
Applying option f (force format) with argument wav.
Successfully parsed a group of options.
Opening an output file: caller.wav.
[file @ 0x7fd078c17300] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (g729 (native) -> pcm_s32le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
detected 8 logical cores
[graph_0_in_0_0 @ 0x7fd078e002a0] Setting 'time_base' to value '1/8000'
[graph_0_in_0_0 @ 0x7fd078e002a0] Setting 'sample_rate' to value '8000'
[graph_0_in_0_0 @ 0x7fd078e002a0] Setting 'sample_fmt' to value 's16'
[graph_0_in_0_0 @ 0x7fd078e002a0] Setting 'channel_layout' to value '0x4'
[graph_0_in_0_0 @ 0x7fd078e002a0] tb:1/8000 samplefmt:s16 samplerate:8000 chlayout:0x4
[format_out_0_0 @ 0x7fd078e00840] Setting 'sample_fmts' to value 's32'
[format_out_0_0 @ 0x7fd078e00840] Setting 'sample_rates' to value '44100'
[format_out_0_0 @ 0x7fd078e00840] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_0'
[AVFilterGraph @ 0x7fd078c186a0] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 0x7fd078e011c0] [SWR @ 0x7fd079800600] Using fltp internally between filters
[auto_resampler_0 @ 0x7fd078e011c0] ch:1 chl:mono fmt:s16 r:8000Hz -> ch:1 chl:mono fmt:s32 r:44100Hz
Output #0, wav, to 'caller.wav':
  Metadata:
    ISFT            : Lavf57.82.100
    Stream #0:0, 0, 1/44100: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s32, 1411 kb/s
    Metadata:
      encoder         : Lavc57.106.101 pcm_s32le
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -82; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -77; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -71; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -66; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -60; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -55; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -49; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -44; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -38; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -33; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -27; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -22; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -16; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -11; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
[wav @ 0x7fd079008600] Non-monotonous DTS in output stream 0:0; previous: 0, current: -5; changing to 0. This may result in incorrect timestamps in the output file.
[g729 @ 0x7fd079019800] Packet type: G.729 @ 8kbit/s
    Last message repeated 2031 times
[out_0_0 @ 0x7fd078e004e0] EOF on sink link out_0_0:default.
No more output streams to write to, finishing.
size=    3528kB time=00:00:00.26 bitrate=108706.8kbits/s speed=0.653x    
video:0kB audio:3528kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.002823%
Input file #0 (caller.raw):
  Input stream #0:0 (audio): 2048 packets read (20480 bytes); 2048 frames decoded (163840 samples); 
  Total: 2048 packets (20480 bytes) demuxed
Output file #0 (caller.wav):
  Output stream #0:0 (audio): 2049 frames encoded (903168 samples); 2049 packets muxed (3612672 bytes); 
  Total: 2049 packets (3612672 bytes) muxed
2048 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x7fd078c17440] Statistics: 4 seeks, 17 writeouts
[AVIOContext @ 0x7fd078c15860] Statistics: 20480 bytes read, 0 seeks