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• Why does ffmpeg generate a mpeg-dash mpd with long timeShiftBufferDepth even with window_size of one minute ? [closed]

  1er février 2024, par igorblima

  I'm having a problem with ffmpeg when i try to create a dynamic mpd from rtmp livestream. The vídeo integrity its ok and works fine, but the only problem is with the timeShiftBufferDepth. The command specifies how much window_size to have, but for some reason the timeShiftBufferDepth generated by ffmpeg doesn't respect that. I specified 1 minute of window_size, but for some reason unknown to me, the timeShiftBufferDepth is generated as 8 minutes

  


  the command :

  


  ffmpeg -i rtmp://localhost:1935/live/stream -c:v libx264 -b:v 1000k -c:a aac -b:a 128k -strict experimental -f dash -window_size 60 -utc_timing_url https://time.akamai.com/?ms -seg_duration 5 -remove_at_exit 1 -dash_segment_type mp4 h264.mpd


  


  result :

  


  timeShiftBufferDepth="PT8M19.9S"


  


  how i say previously, the mpd works fine in the player. The only issue is with that incorrect timeShiftBufferDepth

  


  i read the ffmpeg documentation https://ffmpeg.org/ffmpeg-formats.html#Options-19

  


• FFMPEG : FATAL error, file duration too long for timebase ?

  26 février 2024, par clx

  I want to add a subtitle track on a ProRes files with ffmpeg command on Windows :

  


  ffmpeg.exe  -i "X:\Test\Tokyo01.mov" -i "X:\Test\SubtitleEN.srt" -f mov -c:v copy -c:a copy -c:s mov_text -map 0:v -map 0:a -map "1:0" "-metadata:s:s:0" "language=EN" "-metadata:s:s:0" "handler_name=English"  "-metadata:s:s:0" "title=English" -y "X:\Test\Tokyo01_WithSub.mov" 


  


  I have a fatal error at the end :

  


  ...
FATAL error, file duration too long for timebase, this file will not be1737.7kbits/s speed=0.979x
playable with QuickTime. Choose a different timebase with -video_track_timescale or a different container format
...


  


  Source file looks good with FFProbe :

  


  
[STREAM]
index=0
codec_name=prores
codec_long_name=Apple ProRes (iCodec Pro)
profile=HQ
codec_type=video
codec_time_base=15139/363340
codec_tag_string=apch
codec_tag=0x68637061
width=3996
height=2160
coded_width=3996
coded_height=2160
closed_captions=0
has_b_frames=0
sample_aspect_ratio=N/A
display_aspect_ratio=N/A
pix_fmt=yuv422p10le
level=-99
color_range=tv
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=unspecified
field_order=unknown
timecode=N/A
refs=1
id=N/A
r_frame_rate=24/1
avg_frame_rate=363340/15139
time_base=1/90000
start_pts=0
start_time=0.000000
duration_ts=340627500
duration=3784.750000
bit_rate=656235296
max_bit_rate=N/A
bits_per_raw_sample=10
nb_frames=90835


  


  The complete FFmpeg return console :

  


  ffmpeg version 2023-09-04-git-f8503b4c33-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-dxva2 --enable-d3d11va --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      58. 19.100 / 58. 19.100
  libavcodec     60. 25.100 / 60. 25.100
  libavformat    60. 11.100 / 60. 11.100
  libavdevice    60.  2.101 / 60.  2.101
  libavfilter     9. 11.100 /  9. 11.100
  libswscale      7.  3.100 /  7.  3.100
  libswresample   4. 11.100 /  4. 11.100
  libpostproc    57.  2.100 / 57.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'X:\Test\Tokyo01.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf58.76.100
  Duration: 01:03:04.79, start: 0.000000, bitrate: 663143 kb/s
  Stream #0:0[0x1]: Video: prores (HQ) (apch / 0x68637061), yuv422p10le, 3996x2160, 656235 kb/s, 24 fps, 24 tbr, 90k tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : FFMP
  Stream #0:1[0x2]: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 5.1, s32 (24 bit), 6912 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
[srt @ 000001bc0ec608c0] UTF16 is automatically converted to UTF8, do not specify a character encoding
Input #1, srt, from 'X:\Test\SubtitleEN.srt':
  Duration: N/A, bitrate: N/A
  Stream #1:0: Subtitle: subrip
Output #0, mov, to 'X:\Test\Tokyo01_WithSub.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf60.11.100
  Stream #0:0: Video: prores (HQ) (apch / 0x68637061), yuv422p10le, 3996x2160, q=2-31, 656235 kb/s, 24 fps, 24 tbr, 90k tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : FFMP
  Stream #0:1: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 5.1, s32 (24 bit), 6912 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:2(EN): Subtitle: mov_text (text / 0x74786574)
    Metadata:
      handler_name    : English
      title           : English
      encoder         : Lavc60.25.100 mov_text
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #1:0 -> #0:2 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
FATAL error, file duration too long for timebase, this file will not be1737.7kbits/s speed=0.979x
playable with QuickTime. Choose a different timebase with -video_track_timescale or a different container format
[out#0/mov @ 000001bc0e847340] video:303184287kB audio:3193418kB subtitle:9kB other streams:0kB global headers:0kB muxing overhead: 0.000585%
frame=90834 fps= 23 q=-1.0 Lsize=306379507kB time=01:03:04.77 bitrate=663147.3kbits/s speed=0.979x



  


  I don't find documentation for mentionned command "-video_track_timescale" to change timescale (here 1/90000 ).
I don't understand the problem ??

  


• ffmpeg live rtmp stream does not start to process for long time

  10 août 2013, par user1492502

  I have rtmp stream created by flash player in h264 but when i convert it to video or tumbnail using ffmpeg it some times works after very very long time and some time not work but if I create a stream with Flash Media live encoder on same FMS server the command below works fine. At the same time if I try the stream in player it works well and fine.

  I am using IP so DNS resolving issue is not possible either I think.

  ffmpeg -i rtmp ://xxx.xxx.xx.xx/live/bdeef2c065509361e78fa8cac90aac741cc5ee29 -r 1 -an -updatefirst 1 -y thumbnail.jpg

  Following is when it worked aftre 15 - 20 minutes 
  
  
  
  ffmpeg -i "rtmp://xxx.xxx.xx.xx/live/bdeef2c065509361e78fa8cac90aac741cc5ee29 live=1" -r 1 -an -updatefirst 1 -y thumb.jpg
  
  [root@test ~]# ffmpeg -i rtmp://38.125.41.20/live/bdeef2c065509361e78fa8cac90aac741cc5ee29 -r 1 -an -updatefirst 1 -y thumbnail.jpg
  
  ffmpeg version N-49953-g7d0e3b1-syslint Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Feb 14 2013 15:29:40 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  
    configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
  
    libavutil      52. 17.101 / 52. 17.101
  
    libavcodec     54. 91.103 / 54. 91.103
  
    libavformat    54. 63.100 / 54. 63.100
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 37.101 /  3. 37.101
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [flv @ 0x14c0100] Stream #1: not enough frames to estimate rate; consider increasing probesize
  
  [flv @ 0x14c0100] Could not find codec parameters for stream 1 (Audio: none, 0 channels): unspecified sample format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [flv @ 0x14c0100] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from 'rtmp://xxx.xxx.xx.xx/bdeef2c065509361e78fa8cac90aac741cc5ee29':
  
    Metadata:
  
      keyFrameInterval: 15
  
      quality         : 90
  
      level           : 3.1
  
      bandwith        : 0
  
      codec           : H264Avc
  
      fps             : 15
  
      profile         : baseline
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 15 tbr, 1k tbn, 30 tbc
  
      Stream #0:1: Audio: none, 0 channels
  
  Output #0, image2, to 'thumbnail.jpg':
  
    Metadata:
  
      keyFrameInterval: 15
  
      quality         : 90
  
      level           : 3.1
  
      bandwith        : 0
  
      codec           : H264Avc
  
      fps             : 15
  
      profile         : baseline
  
      encoder         : Lavf54.63.100
  
      Stream #0:0: Video: mjpeg, yuvj420p, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 1 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> mjpeg)
  
  Press [q] to stop, [?] for help
  
  frame= 2723 fps=1.3 q=1.6 size=N/A time=00:45:23.00 bitrate=N/A dup=8 drop=12044

  and on stopping the stream by closing the browser running the flash player which is publishing the video I get the following

  [flv @ 0x23684e0] Could not find codec parameters for stream 1 (Audio: none, 0 channels): unspecified sample format
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  [flv @ 0x23684e0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, flv, from 'rtmp://xxx.xxx.xx.xx/live/bdeef2c065509361e78fa8cac90aac741cc5ee29':
  
    Metadata:
  
      keyFrameInterval: 15
  
      quality         : 90
  
      bandwith        : 0
  
      level           : 3.1
  
      codec           : H264Avc
  
      fps             : 15
  
      profile         : baseline
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 15 tbr, 1k tbn, 30 tbc
  
      Stream #0:1: Audio: none, 0 channels

  when if i stop the stream it quickly creates a thumbnail file where as running stream is an issue.