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  • FFmpeg media info incorrect when encoding aac audio track

    11 janvier 2023, par user2028936

    I recently dipped my feet into encoding with FFmpeg. It's been working fine for me apart form 1 issues I have noticed recently. When I try and re-encode an audio track to acc the media info tags are somewhat wrong. Bitrate, streamsize etc seems to be copied form the source as opposed to reading it from the new track.

    



    Essentially I want to copy the source video, audio and subtitles and also create an AAC version of the soundtrack for playback on devices that don't support HD audio.

    



    Below is an example of what I am doing :

    



    ffmpeg -i source.mkv -map_chapters 0 -map 0:v -c:v copy -c:s copy -map 0:a -c:a:0 copy -map 0:a c:a:1 aac destination.mkv


    



    This results in a media info of :

    



    Audio #1
ID                                       : 2
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 1 h 50 min
Bit rate mode                            : Variable
Bit rate                                 : 3 545 kb/s
Maximum bit rate                         : 5 826 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Bit depth                                : 24 bits
Compression mode                         : Lossless
Delay relative to video                  : 21 ms
Stream size                              : 2.73 GiB (29%)
Title                                    : Dolby TrueHD 7.1 (Atmos)
Language                                 : English
Default                                  : Yes
Forced                                   : No
Number of dynamic objects                : 11
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

Audio #2
ID                                       : 3
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : A_AAC-2
Duration                                 : 1 h 50 min
Bit rate                                 : 3 545 kb/s
Channel(s)                               : 8 channels
Channel layout                           : C L R Ls Rs Lb Rb LFE
Sampling rate                            : 48.0 kHz
Frame rate                               : 46.875 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 2.73 GiB (29%)
Title                                    : AAC 5.1
Writing library                          : Lavc58.62.100 aac
Language                                 : English
Default                                  : Yes
Forced                                   : No


    



    As you can see the bit rate, stream size, etc is copied from the source track which is incorrect. I've tried the -map_metadata -1 but that removes the metadata without creating a new one and also removed it from all video and audio tracks which I don't want.

    



    Any other ideas what I am doing wrong or is this just a quirk of the software ?

    



    Thanks in advance.

    



    Adding -report output trimming the lines "Writing block of size..." as the file is huge :

    



    ffmpeg started on 2019-12-04 at 14:31:25
Report written to "ffmpeg-20191204-143125.log"
Log level: 48
Command line:
"C:\\ffmpeg\\ffmpeg-20191118-d831edc-win64-static\\bin\\ffmpeg" -i input.mkv -report -map_chapters 0 -map 0:v -c:v copy -c:s copy -map 0:a -c:a:0 copy -map 0:a -c:a:1 aac destination.mkv
ffmpeg version git-2019-11-18-d831edc Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20191010
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 36.100 / 56. 36.100
  libavcodec     58. 62.100 / 58. 62.100
  libavformat    58. 35.100 / 58. 35.100
  libavdevice    58.  9.101 / 58.  9.101
  libavfilter     7. 66.100 /  7. 66.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'input.mkv'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-map_chapters' ... matched as option 'map_chapters' (set chapters mapping) with argument '0'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:v'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-c:s' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:a'.
Reading option '-c:a:0' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:a'.
Reading option '-c:a:1' ... matched as option 'c' (codec name) with argument 'aac'.
Reading option 'destination.mkv' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url input.mkv.
Successfully parsed a group of options.
Opening an input file: input.mkv.
[NULL @ 000001b290ddad00] Opening 'input.mkv' for reading
[file @ 000001b290ddbe00] Setting default whitelist 'file,crypto'
[matroska,webm @ 000001b290ddad00] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
st:1 removing common factor 1000000 from timebase
[matroska,webm @ 000001b290ddad00] Before avformat_find_stream_info() pos: 5080 bytes read:32768 seeks:0 nb_streams:2
[hevc @ 000001b290ddeb80] nal_unit_type: 32(VPS), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding VPS
[hevc @ 000001b290ddeb80] Main 10 profile bitstream
[hevc @ 000001b290ddeb80] nal_unit_type: 33(SPS), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding SPS
[hevc @ 000001b290ddeb80] Main 10 profile bitstream
[hevc @ 000001b290ddeb80] Decoding VUI
[hevc @ 000001b290ddeb80] nal_unit_type: 34(PPS), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding PPS
[hevc @ 000001b290ddeb80] nal_unit_type: 39(SEI_PREFIX), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding SEI
[hevc @ 000001b290ddeb80] nal_unit_type: 39(SEI_PREFIX), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding SEI
[hevc @ 000001b290ddeb80] nal_unit_type: 39(SEI_PREFIX), nuh_layer_id: 0, temporal_id: 0
[hevc @ 000001b290ddeb80] Decoding SEI
[hevc @ 000001b290ddeb80] Skipped PREFIX SEI 5
[matroska,webm @ 000001b290ddad00] All info found
[matroska,webm @ 000001b290ddad00] After avformat_find_stream_info() pos: 10219 bytes read:32768 seeks:0 frames:4
Input #0, matroska,webm, from 'input.mkv':
  Metadata:
    title           : input
    ENCODER         : Lavf58.35.100
  Duration: 01:50:06.89, start: 0.000000, bitrate: 11569 kb/s
    Chapter #0:0: start 0.000000, end 308.766792
    Metadata:
      title           : Chapter 01
    Chapter #0:1: start 308.766792, end 679.720708
    Metadata:
      title           : Chapter 02
    Chapter #0:2: start 679.720708, end 904.820583
    Metadata:
      title           : Chapter 03
    Chapter #0:3: start 904.820583, end 1282.781500
    Metadata:
      title           : Chapter 04
    Chapter #0:4: start 1282.781500, end 1487.736250
    Metadata:
      title           : Chapter 05
    Chapter #0:5: start 1487.736250, end 1846.177667
    Metadata:
      title           : Chapter 06
    Chapter #0:6: start 1846.177667, end 2116.531083
    Metadata:
      title           : Chapter 07
    Chapter #0:7: start 2116.531083, end 2443.858083
    Metadata:
      title           : Chapter 08
    Chapter #0:8: start 2443.858083, end 2731.979250
    Metadata:
      title           : Chapter 09
    Chapter #0:9: start 2731.979250, end 3178.383542
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 3178.383542, end 3636.507875
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 3636.507875, end 3867.488625
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 3867.488625, end 4208.037167
    Metadata:
      title           : Chapter 13
    Chapter #0:13: start 4208.037167, end 4502.372875
    Metadata:
      title           : Chapter 14
    Chapter #0:14: start 4502.372875, end 4853.431917
    Metadata:
      title           : Chapter 15
    Chapter #0:15: start 4853.431917, end 5267.470542
    Metadata:
      title           : Chapter 16
    Chapter #0:16: start 5267.470542, end 5543.329458
    Metadata:
      title           : Chapter 17
    Chapter #0:17: start 5543.329458, end 5847.132958
    Metadata:
      title           : Chapter 18
    Chapter #0:18: start 5847.132958, end 6150.269125
    Metadata:
      title           : Chapter 19
    Chapter #0:19: start 6150.269125, end 6606.891958
    Metadata:
      title           : Chapter 20
    Stream #0:0, 3, 1/1000: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1600 [SAR 1:1 DAR 12:5], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc
    Metadata:
      title           : input
      ENCODER         : Lavc58.62.100 libx265
      DURATION        : 01:50:06.891000000
    Stream #0:1(eng), 1, 1/1000: Audio: truehd, 48000 Hz, 7.1, s32 (24 bit) (default)
    Metadata:
      title           : input
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      BPS-eng         : 3544728
      DURATION-eng    : 01:50:06.893000000
      NUMBER_OF_FRAMES-eng: 7928271
      NUMBER_OF_BYTES-eng: 2927455224
      _STATISTICS_WRITING_APP-eng: mkvmerge v40.0.0 ('Old Town Road + Pony') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-11-30 10:59:25
      DURATION        : 01:50:06.893000000
Successfully opened the file.
Parsing a group of options: output url destination.mkv.
Applying option map_chapters (set chapters mapping) with argument 0.
Applying option map (set input stream mapping) with argument 0:v.
Applying option c:v (codec name) with argument copy.
Applying option c:s (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0:a.
Applying option c:a:0 (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0:a.
Applying option c:a:1 (codec name) with argument aac.
Successfully parsed a group of options.
Opening an output file: destination.mkv.
[file @ 000001b290ea7e40] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #0:1 -> #0:2 (truehd (native) -> aac (native))
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:2 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:2 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:2 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:1 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:2 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
detected 12 logical cores
[graph_0_in_0_1 @ 000001b290dda840] Setting 'time_base' to value '1/48000'
[graph_0_in_0_1 @ 000001b290dda840] Setting 'sample_rate' to value '48000'
[graph_0_in_0_1 @ 000001b290dda840] Setting 'sample_fmt' to value 's32'
[graph_0_in_0_1 @ 000001b290dda840] Setting 'channel_layout' to value '0x63f'
[graph_0_in_0_1 @ 000001b290dda840] tb:1/48000 samplefmt:s32 samplerate:48000 chlayout:0x63f
[format_out_0_2 @ 000001b290e0ea00] Setting 'sample_fmts' to value 'fltp'
[format_out_0_2 @ 000001b290e0ea00] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[format_out_0_2 @ 000001b290e0ea00] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_2'
[AVFilterGraph @ 000001b290e1b3c0] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 000001b290e0fe80] [SWR @ 000001b291232000] Using fltp internally between filters
[auto_resampler_0 @ 000001b290e0fe80] ch:8 chl:7.1 fmt:s32 r:48000Hz -> ch:8 chl:7.1 fmt:fltp r:48000Hz
[matroska @ 000001b290dfba40] get_metadata_duration returned: 6606893000
[matroska @ 000001b290dfba40] Write early duration from metadata = 6606893
Output #0, matroska, to 'destination.mkv':
  Metadata:
    title           : input
    encoder         : Lavf58.35.100
    Chapter #0:0: start 0.000000, end 308.766792
    Metadata:
      title           : Chapter 01
    Chapter #0:1: start 308.766792, end 679.720708
    Metadata:
      title           : Chapter 02
    Chapter #0:2: start 679.720708, end 904.820583
    Metadata:
      title           : Chapter 03
    Chapter #0:3: start 904.820583, end 1282.781500
    Metadata:
      title           : Chapter 04
    Chapter #0:4: start 1282.781500, end 1487.736250
    Metadata:
      title           : Chapter 05
    Chapter #0:5: start 1487.736250, end 1846.177667
    Metadata:
      title           : Chapter 06
    Chapter #0:6: start 1846.177667, end 2116.531083
    Metadata:
      title           : Chapter 07
    Chapter #0:7: start 2116.531083, end 2443.858083
    Metadata:
      title           : Chapter 08
    Chapter #0:8: start 2443.858083, end 2731.979250
    Metadata:
      title           : Chapter 09
    Chapter #0:9: start 2731.979250, end 3178.383542
    Metadata:
      title           : Chapter 10
    Chapter #0:10: start 3178.383542, end 3636.507875
    Metadata:
      title           : Chapter 11
    Chapter #0:11: start 3636.507875, end 3867.488625
    Metadata:
      title           : Chapter 12
    Chapter #0:12: start 3867.488625, end 4208.037167
    Metadata:
      title           : Chapter 13
    Chapter #0:13: start 4208.037167, end 4502.372875
    Metadata:
      title           : Chapter 14
    Chapter #0:14: start 4502.372875, end 4853.431917
    Metadata:
      title           : Chapter 15
    Chapter #0:15: start 4853.431917, end 5267.470542
    Metadata:
      title           : Chapter 16
    Chapter #0:16: start 5267.470542, end 5543.329458
    Metadata:
      title           : Chapter 17
    Chapter #0:17: start 5543.329458, end 5847.132958
    Metadata:
      title           : Chapter 18
    Chapter #0:18: start 5847.132958, end 6150.269125
    Metadata:
      title           : Chapter 19
    Chapter #0:19: start 6150.269125, end 6606.891958
    Metadata:
      title           : Chapter 20
    Stream #0:0, 0, 1/1000: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x1600 [SAR 1:1 DAR 12:5], q=2-31, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc
    Metadata:
      title           : input
      ENCODER         : Lavc58.62.100 libx265
      DURATION        : 01:50:06.891000000
    Stream #0:1(eng), 0, 1/1000: Audio: truehd ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, 7.1, s32 (24 bit) (default)
    Metadata:
      title           : input
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      BPS-eng         : 3544728
      DURATION-eng    : 01:50:06.893000000
      NUMBER_OF_FRAMES-eng: 7928271
      NUMBER_OF_BYTES-eng: 2927455224
      _STATISTICS_WRITING_APP-eng: mkvmerge v40.0.0 ('Old Town Road + Pony') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-11-30 10:59:25
      DURATION        : 01:50:06.893000000
    Stream #0:2(eng), 0, 1/1000: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 7.1, fltp (24 bit), 469 kb/s (default)
    Metadata:
      title           : input
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      BPS-eng         : 3544728
      DURATION-eng    : 01:50:06.893000000
      NUMBER_OF_FRAMES-eng: 7928271
      NUMBER_OF_BYTES-eng: 2927455224
      _STATISTICS_WRITING_APP-eng: mkvmerge v40.0.0 ('Old Town Road + Pony') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-11-30 10:59:25
      DURATION        : 01:50:06.893000000
      encoder         : Lavc58.62.100 aac
cur_dts is invalid st:2 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)

....................
....................
[matroska @ 000001b290dfba40] Writing block of size 168 with pts 6606913, dts 6606913, duration 1 at relative offset 550755 in cluster at offset 9940898622. TrackNumber 2, keyframe 1
[matroska @ 000001b290dfba40] end duration = 6606914
[matroska @ 000001b290dfba40] stream 0 end duration = 6606912
[matroska @ 000001b290dfba40] stream 1 end duration = 6606914
[matroska @ 000001b290dfba40] stream 2 end duration = 6606914
frame=158407 fps=357 q=-1.0 Lsize= 9708475kB time=01:50:06.91 bitrate=12037.7kbits/s speed=14.9x    
video:6416483kB audio:3234397kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.596787%
Input file #0 (input.mkv):
  Input stream #0:0 (video): 158407 packets read (6570478730 bytes); 
  Input stream #0:1 (audio): 7928271 packets read (2927455224 bytes); 7928271 frames decoded (317130840 samples); 
  Total: 8086678 packets (9497933954 bytes) demuxed
Output file #0 (destination.mkv):
  Output stream #0:0 (video): 158407 packets muxed (6570478730 bytes); 
  Output stream #0:1 (audio): 7928271 packets muxed (2927455224 bytes); 
  Output stream #0:2 (audio): 309699 frames encoded (317130840 samples); 309700 packets muxed (384567176 bytes); 
  Total: 8396378 packets (9882501130 bytes) muxed
7928271 frames successfully decoded, 0 decoding errors
[AVIOContext @ 000001b291230100] Statistics: 8 seeks, 39676 writeouts
[aac @ 000001b290dff3c0] Qavg: 3839.668
[AVIOContext @ 000001b290de4080] Statistics: 9554742230 bytes read, 0 seeks


    


  • Using ffmpeg for capturing (and recording) audio and video from decklink card using Windows 7 [closed]

    30 septembre 2015, par user3540580

    Im new with ffmpeg. I am trying to capture the video + audio from Decklink capture device. However I had some problems, I don’t know which stream using for my current video + audio source that connected to the decklink card’s SDI port. Could someone tell me how to find out the streaming information.

    Here is my information :

    ffmpeg -list_devices true -f dshow -i dummy

    C:\Users\Streaming>ffmpeg -list_devices true -f dshow -i dummy ffmpeg version N-52941-g13cb6ed Copyright (c) 2000-2013 the FFmpeg developers built on May 9 2013 17:24:42 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp e --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrn b --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libr tmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheo ra --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena ble-zlib libavutil 52. 30.100 / 52. 30.100 libavcodec 55. 7.100 / 55. 7.100 libavformat 55. 4.101 / 55. 4.101 libavdevice 55. 0.100 / 55. 0.100 libavfilter 3. 63.101 / 3. 63.101 libswscale 2. 3.100 / 2. 3.100 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 3.100 / 52. 3.100 [dshow @ 0000000000306d00] DirectShow video devices [dshow @ 0000000000306d00] "Blackmagic WDM Capture" [dshow @ 0000000000306d00] "Decklink Video Capture" [dshow @ 0000000000306d00] DirectShow audio devices [dshow @ 0000000000306d00] "Line In (High Definition Audio " [dshow @ 0000000000306d00] "Decklink Audio Capture" [dshow @ 0000000000306d00] "Microphone (Total Recorder WDM " dummy: Immediate exit requested

    ffmpeg -list_options true -f dshow -i video="Decklink Video Capture"

    C:\Users\Streaming>ffmpeg -list_options true -f dshow -i video="Decklink Video C apture" ffmpeg version N-52941-g13cb6ed Copyright (c) 2000-2013 the FFmpeg developers built on May 9 2013 17:24:42 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp e --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrn b --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libr tmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheo ra --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-li bvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --ena ble-zlib libavutil 52. 30.100 / 52. 30.100 libavcodec 55. 7.100 / 55. 7.100 libavformat 55. 4.101 / 55. 4.101 libavdevice 55. 0.100 / 55. 0.100 libavfilter 3. 63.101 / 3. 63.101 libswscale 2. 3.100 / 2. 3.100 libswresample 0. 17.102 / 0. 17.102 libpostproc 52. 3.100 / 52. 3.100 [dshow @ 00000000002fa080] DirectShow video device options [dshow @ 00000000002fa080] Pin "Capture" [dshow @ 00000000002fa080]
    
pixel_format=uyvy422 min s=720x486 fps=29.97 max s =720x486 fps=29.97 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=720x486 fps=23.976 max s=720x486 fps=23.976 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=720x576 fps=25 max s=72 0x576 fps=25 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1920x1080 fps=23.976 ma x s=1920x1080 fps=23.976 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1920x1080 fps=24 max s= 1920x1080 fps=24 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1920x1080 fps=25 max s= 1920x1080 fps=25 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1920x1080 fps=29.97 max s=1920x1080 fps=29.97 [dshow @ 00000000002fa080]
    
pixel_format=uyvy422 min s=1920x1080 fps=30 max s= 1920x1080 fps=30 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1280x720 fps=50 max s=1 280x720 fps=50 [dshow @ 00000000002fa080]
    
pixel_format=uyvy422 min s=1280x720 fps=59.9402 ma x s=1280x720 fps=59.9402 [dshow @ 00000000002fa080] pixel_format=uyvy422 min s=1280x720 fps=60.0002 ma x s=1280x720 fps=60.0002 [dshow @ 00000000002fa080] vcodec=v210 min s=720x486 fps=29.97 max s=720x486 fps=29.97 [dshow @ 00000000002fa080] vcodec=v210 min s=720x486 fps=23.976 max s=720x486 fps=23.976 [dshow @ 00000000002fa080]
    
vcodec=v210 min s=720x576 fps=25 max s=720x576 fps =25 [dshow @ 00000000002fa080] vcodec=v210 min s=1920x1080 fps=23.976 max s=1920x 1080 fps=23.976 [dshow @ 00000000002fa080]
    
vcodec=v210 min s=1920x1080 fps=24 max s=1920x1080 fps=24 [dshow @ 00000000002fa080] vcodec=v210 min s=1920x1080 fps=25 max s=1920x1080 fps=25 [dshow @ 00000000002fa080] vcodec=v210 min s=1920x1080 fps=29.97 max s=1920x1 080 fps=29.97 [dshow @ 00000000002fa080] vcodec=v210 min s=1920x1080 fps=30 max s=1920x1080 fps=30 [dshow @ 00000000002fa080] vcodec=v210 min s=1280x720 fps=50 max s=1280x720 f ps=50 [dshow @ 00000000002fa080]
    
vcodec=v210 min s=1280x720 fps=59.9402 max s=1280x 720 fps=59.9402 [dshow @ 00000000002fa080] vcodec=v210 min s=1280x720 fps=60.0002 max s=1280x 720 fps=60.0002 video=Decklink Video Capture: Immediate exit requested

  • muxing DVB subtitles into transport stream with ffmpeg

    28 novembre 2019, par user3439130

    So i have H264 video + AAC audio muxed inside transport stream (*.ts). To achive evenly spread PCR values i added muxrate tag to my command.

    ffmpeg -analyzeduration 20000000 -probesize 20M -loglevel verbose -i 1135084.m4v -i 1135084.m4a -c copy -muxrate 7982K -map 0:v:0 -map 1:a:0 -metadata:s:a:0 language=eng -metadata:s:a:0 tms_track_id=169451954 TEMP0.ts

    Since our client need DVB substitles we convert SRT to DVD with subtitle edit and then encode them to DVB with ffmpeg with this command :

    ffmpeg -analyzeduration 20000000 -probesize 20M -loglevel verbose -i TEMP0.ts -i out.da.idx -map 0 -c copy -muxrate 7992K -map 1:s -c:s:0 dvbsub -metadata:s:s:0 language=dan TEMP1.ts

    here is output from ffmpeg command :

    ffmpeg version git-2019-11-18-d831edc Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 9.2.1 (GCC) 20191010
    
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
    
  libavutil      56. 36.100 / 56. 36.100
    
  libavcodec     58. 62.100 / 58. 62.100
    
  libavformat    58. 35.100 / 58. 35.100
    
  libavdevice    58.  9.101 / 58.  9.101
    
  libavfilter     7. 66.100 /  7. 66.100
    
  libswscale      5.  6.100 /  5.  6.100
    
  libswresample   3.  6.100 /  3.  6.100
    
  libpostproc    55.  6.100 / 55.  6.100
    
[h264 @ 000002bf7460d400] non-existing SPS 0 referenced in buffering period
    
[h264 @ 000002bf7460d400] SPS unavailable in decode_picture_timing
    
[h264 @ 000002bf7460d400] non-existing SPS 0 referenced in buffering period
    
[h264 @ 000002bf7460d400] SPS unavailable in decode_picture_timing
    
[h264 @ 000002bf7460d400] Reinit context to 1920x1088, pix_fmt: yuv420p
    
[mpegts @ 000002bf7460ae00] max_analyze_duration 20000000 reached at 20000000 microseconds st:0
    
[mpegts @ 000002bf7460ae00] start time for stream 2 is not set in estimate_timings_from_pts
    
Input #0, mpegts, from 'TEMP1.ts':
    
  Duration: 01:51:54.48, start: 1.440000, bitrate: 7992 kb/s
    
  Program 1
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(progressive, left), 1920x1080 (1920x1088) [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x101](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 254 kb/s
    
    Stream #0:2[0x102](dan): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    
[vobsub @ 000002bf75d65940] IDX/SUB: out.fi.idx -> out.fi.sub
    
Input #1, vobsub, from 'out.fi.idx':
    
  Duration: N/A, bitrate: N/A
    
    Stream #1:0[0x0](fi): Subtitle: dvd_subtitle, 1920x1080 (default)
    
File 'TEMP2.ts' already exists. Overwrite? [y/N] y
    
[mpegts @ 000002bf74634f00] service 1 using PCR in pid=256, pcr_period=20ms
    
[mpegts @ 000002bf74634f00] muxrate 8002000, sdt every 500 ms, pat/pmt every 100 ms
    
Output #0, mpegts, to 'TEMP2.ts':
    
  Metadata:
    
    encoder         : Lavf58.35.100
    
    Stream #0:0: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(progressive, left), 1920x1080 (0x0) [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 90k tbn, 90k tbc
    
    Stream #0:1(eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 254 kb/s
    
    Stream #0:2(dan): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    
    Stream #0:3(fin): Subtitle: dvb_subtitle (dvbsub), 1920x1080 (default)
    
    Metadata:
    
      encoder         : Lavc58.62.100 dvbsub
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
  Stream #0:2 -> #0:2 (copy)
    
  Stream #1:0 -> #0:3 (dvd_subtitle (dvdsub) -> dvb_subtitle (dvbsub))
    
Press [q] to stop, [?] for help
    
No more output streams to write to, finishing.me=01:51:46.51 bitrate=7990.2kbits/s speed=18.2x
    
frame=167862 fps=456 q=-1.0 Lsize= 6558750kB time=01:51:54.47 bitrate=8002.0kbits/s speed=18.2x
    
video:5738580kB audio:212004kB subtitle:10989kB other streams:0kB global headers:0kB muxing overhead: 10.017118%
    
Input file #0 (TEMP1.ts):
    
  Input stream #0:0 (video): 167862 packets read (5876305439 bytes);
    
  Input stream #0:1 (audio): 314742 packets read (217092443 bytes);
    
  Input stream #0:2 (subtitle): 1740 packets read (5578504 bytes);
    
  Total: 484344 packets (6098976386 bytes) demuxed
    
Input file #1 (out.fi.idx):
    
  Input stream #1:0 (subtitle): 855 packets read (6881158 bytes); 854 frames decoded;
    
  Total: 855 packets (6881158 bytes) demuxed
    
Output file #0 (TEMP2.ts):
    
  Output stream #0:0 (video): 167862 packets muxed (5876305439 bytes);
    
  Output stream #0:1 (audio): 314742 packets muxed (217092443 bytes);
    
  Output stream #0:2 (subtitle): 1740 packets muxed (5578504 bytes);
    
  Output stream #0:3 (subtitle): 1708 frames encoded; 1708 packets muxed (5673736 bytes);
    
  Total: 486052 packets (6104650122 bytes) muxed
    
[AVIOContext @ 000002bf7463c280] Statistics: 0 seeks, 25621 writeouts
    
[AVIOContext @ 000002bf74613f80] Statistics: 6728300448 bytes read, 2 seeks
    
[AVIOContext @ 000002bf75efde40] Statistics: 7852032 bytes read, 0 seeks
    
[AVIOContext @ 000002bf74f30e40] Statistics: 40275 bytes read, 0 seeks

    So i have video/audio and two dvb tracks inside one TS.

    Now im adding third subtitle and i get this warning :

    frame=32351 fps=869 q=-1.0 size= 1255936kB time=00:21:33.99 bitrate=7951.1kbits/s speed=34.8x
    
[mpegts @ 0x2994600] Non-monotonous DTS in output stream 0:3; previous: 116868609, current: 116868607; changing to 116868610. This may result in incorrect timestamps in the output file.
    
frame=33416 fps=886 q=-1.0 size= 1297408kB time=00:22:16.56 bitrate=7952.0kbits/s speed=35.4x

    By this warning it seems that something is not right with DVB (0:3) Finish track.
    Playing back the file with VLC i can see that Finish subtitles (between 21:33 and 22:16) are not showing up.

    Dumping packets from 0:3 track i see that 4 packets have the same DTS/PTS values.

    #stream#, dts,        pts, duration,     size, hash
    
0,  111258000,  111258000,        0,     6979, 6215f060, S=1,        1, 67d220bc
    
0,  111689100,  111689100,        0,       25, e60e94fa, S=1,        1, 67d220bc
    
0,  113230800,  113230800,        0,     4423, f811be62, S=1,        1, 67d220bc
    
0,  113561550,  113561550,        0,       25, 6db8d81f, S=1,        1, 67d220bc
    
0,  113788800,  113788800,        0,     8247, 8b494779, S=1,        1, 67d220bc
    
0,  114191190,  114191190,        0,       25, a205e183, S=1,        1, 67d220bc
    

    
0,  116868607,  116868607,        0,     1119, e5d11188, S=1,        1, 67d220bc
    
0,  116868607,  116868607,        0,       28, 11e09861, S=1,        1, 67d220bc
    
0,  116868607,  116868607,        0,     1122, 8320a3f5, S=1,        1, 67d220bc
    
0,  116868607,  116868607,        0,       28, e896fa37, S=1,        1, 67d220bc
    

    
0,  117205200,  117205200,        0,     3583, 47b23f27, S=1,        1, 67d220bc
    
0,  117611640,  117611640,        0,       25, e5ae32ed, S=1,        1, 67d220bc
    
0,  117709200,  117709200,        0,     1119, 208b4f80, S=1,        1, 67d220bc
    
0,  117830970,  117830970,        0,       25, 2a130b71, S=1,        1, 67d220bc
    
0,  117846000,  117846000,        0,     3105, f179a4f0, S=1,        1, 67d220bc
    
0,  118148040,  118148040,        0,       25, 29b3ad66, S=1,        1, 67d220bc
    
0,  120146410,  120146410,        0,     1119, 714ef5d1, S=1,        1, 67d220bc
    
0,  120146410,  120146410,        0,       28, bbad7fed, S=1,        1, 67d220bc
    
0,  120708000,  120708000,        0,     2060, 703084f7, S=1,        1, 67d220bc
    
0,  120855420,  120855420,        0,       25, 6db8d81f, S=1,        1, 67d220bc
    
0,  121122000,  121122000,        0,     2184, 04a7be71, S=1,        1, 67d220bc
    
0,  121395330,  121395330,        0,       25, a205e183, S=1,        1, 67d220bc

    Thes are the lines from SRT file where the warning happens :

    146
    
00:21:34,840 --> 00:21:36,600
    
Make!
    
147
    
00:21:42,280 --> 00:21:46,800
    
Make! Hei, Make. Make!
    
148
    
00:21:47,880 --> 00:21:49,240
    
Make!
    
149
    
00:21:49,400 --> 00:21:52,760
    
Odota minua, Make!
    
150
    
00:22:00,400 --> 00:22:01,760
    
Make!

    Sometimes muxing subtitles in different order (for example Finish before Danish and then Swedish) would solve this problem, but i would like to know why such things are happening.

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