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  • ffmpeg to convert file to webm returns in error

    14 avril 2019, par user3184895

    i have a self-recorded file in .ts format and want to convert it to three different formats(.mp4, .ogg and .webm).

    for that i use my brandnew debian9 with following commands :

    /usr/bin/ffmpeg -y -i source.ts -strict experimental -r 25 -b 18550k -bt 22792k -acodec aac -ac 2 -ar 48000 -ab 320k output.mp4

    /usr/bin/ffmpeg -y -i source.ts -r 25 -b 18550k -bt 22792k -vcodec libtheora -acodec libvorbis -ac 2 -ar 48000 -ab 320k output.ogg

    /usr/bin/ffmpeg -y -i source.ts -r 25 -b 18550k -bt 22792k -ac 2 -ar 48000 -ab 320k output.webm

    Source-File :

    General
    
ID                                       : 1019 (0x3FB)
    
Complete name                            : test.ts
    
Format                                   : MPEG-TS
    
File size                                : 85.9 MiB
    
Duration                                 : 56 s 490 ms
    
Overall bit rate mode                    : Variable
    
Overall bit rate                         : 12.7 Mb/s
    

    
Video
    
ID                                       : 5101 (0x13ED)
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format profile                           : High@L4
    
Format settings, CABAC                   : Yes
    
Format settings, ReFrames                : 4 frames
    
Codec ID                                 : 27
    
Duration                                 : 55 s 880 ms
    
Bit rate                                 : 11.1 Mb/s
    
Width                                    : 1 280 pixels
    
Height                                   : 720 pixels
    
Display aspect ratio                     : 16:9
    
Frame rate                               : 50.000 FPS
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Bits/(Pixel*Frame)                       : 0.241
    
Stream size                              : 74.1 MiB (86%)
    

    
Audio #1
    
ID                                       : 5102 (0x13EE)
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : MPEG Audio
    
Format version                           : Version 1
    
Format profile                           : Layer 2
    
Codec ID                                 : 3
    
Duration                                 : 56 s 448 ms
    
Bit rate mode                            : Constant
    
Bit rate                                 : 256 kb/s
    
Channel(s)                               : 2 channels
    
Sampling rate                            : 48.0 kHz
    
Compression mode                         : Lossy
    
Delay relative to video                  : -1 s 136 ms
    
Stream size                              : 1.72 MiB (2%)
    
Language                                 : German
    

    
Audio #2
    
ID                                       : 5103 (0x13EF)
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : MPEG Audio
    
Format version                           : Version 1
    
Format profile                           : Layer 2
    
Codec ID                                 : 3
    
Duration                                 : 56 s 448 ms
    
Bit rate mode                            : Constant
    
Bit rate                                 : 256 kb/s
    
Channel(s)                               : 2 channels
    
Sampling rate                            : 48.0 kHz
    
Compression mode                         : Lossy
    
Delay relative to video                  : -1 s 136 ms
    
Stream size                              : 1.72 MiB (2%)
    
descriptor_tag_extension                 : 6
    

    
Audio #3
    
ID                                       : 5106 (0x13F2)
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : AC-3
    
Format/Info                              : Audio Coding 3
    
Mode extension                           : CM (complete main)
    
Format settings, Endianness              : Big
    
Codec ID                                 : 6
    
Duration                                 : 56 s 480 ms
    
Bit rate mode                            : Constant
    
Bit rate                                 : 448 kb/s
    
Channel(s)                               : 2 channels
    
Channel positions                        : Front: L R
    
Sampling rate                            : 48.0 kHz
    
Frame rate                               : 31.250 FPS (1536 spf)
    
Bit depth                                : 16 bits
    
Compression mode                         : Lossy
    
Delay relative to video                  : -1 s 168 ms
    
Stream size                              : 3.02 MiB (4%)
    
Language                                 : German
    

    
Text
    
ID                                       : 5105 (0x13F1)
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : DVB Subtitle
    
Codec ID                                 : 6
    
Duration                                 : 54 s 800 ms
    
Delay relative to video                  : 2 s 520 ms
    
Language                                 : German
    

    
Other
    
ID                                       : 5104 (0x13F0)-100
    
Menu ID                                  : 10301 (0x283D)
    
Format                                   : Teletext
    
Language                                 : German
    

    
Menu
    
ID                                       : 5100 (0x13EC)
    
Menu ID                                  : 10301 (0x283D)
    
Duration                                 : 56 s 490 ms
    
List                                     : 1170 (0x492) () / 1176 (0x498) () / 2171 (0x87B) () / 5101 (0x13ED) (AVC) / 5102 (0x13EE) (MPEG Audio, German) / 5103 (0x13EF) (MPEG Audio) / 5104 (0x13F0)-100 (Teletext, de) / 5105 (0x13F1) (DVB Subtitle, German) / 5106 (0x13F2) (AC-3, German) / 5108 (0x13F4) () / 5172 (0x1434) ()
    
Language                                 :  /  /  /  / German /  / German / German / German

    Why i am doing that ? I just play arround with a privat intranet (web-application) to stream my own recorded files on different clients (Smartphone, Tablet, Desktop). Thats also the reason for the different formats (.mp4, .ogg, .webm)

    My current problem is : The command to convert it to .webm returns following error :

     /usr/bin/ffmpeg -y -i test.ts -r 25 -b 18550k -bt 22792k -ac 2 -ar 48000 -ab 320k output.webm
    
ffmpeg version 3.2.12-1~deb9u1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
    
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
    
[h264 @ 0x557535b03b40] decode_slice_header error
    
[h264 @ 0x557535b03b40] no frame!
    
[mpegts @ 0x557535ade440] start time for stream 9 is not set in estimate_timings_from_pts
    
[mpegts @ 0x557535ade440] PES packet size mismatch
    
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 0 (Unknown: none ([5][0][0][0] / 0x0005)): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 1 (Unknown: none ([12][0][0][0] / 0x000C)): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 2 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 10 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, mpegts, from 'test.ts':
    
  Duration: 00:00:58.04, start: 86615.181389, bitrate: 12418 kb/s
    
  Program 10301
    
    Stream #0:0[0x492]: Unknown: none ([5][0][0][0] / 0x0005)
    
    Stream #0:1[0x498]: Unknown: none ([12][0][0][0] / 0x000C)
    
    Stream #0:2[0x87b]: Unknown: none ([11][0][0][0] / 0x000B)
    
    Stream #0:3[0x13ed]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
    
    Stream #0:4[0x13ee](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
    
    Stream #0:5[0x13ef](mis): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
    
    Stream #0:6[0x13f0](deu): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
    
    Stream #0:7[0x13f1](deu): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)
    
    Stream #0:8[0x13f2](deu): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz, stereo, fltp, 448 kb/s
    
    Stream #0:9[0x13f4]: Data: bin_data ([6][0][0][0] / 0x0006)
    
    Stream #0:10[0x1434]: Unknown: none ([11][0][0][0] / 0x000B)
    
  Program 10302
    
  Program 10303
    
  Program 10304
    
Please use -b:a or -b:v, -b is ambiguous
    
[libvpx-vp9 @ 0x557535ba6d00] v1.6.1
    
Stream mapping:
    
  Stream #0:3 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
    
  Stream #0:4 -> #0:1 (mp2 (native) -> opus (libopus))
    
  Stream #0:6 -> #0:2 (dvb_teletext (libzvbi_teletextdec) -> webvtt (native))
    
Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or height

    i dont understand the problem, because the convertions to .ogg or .mp4 are workin. So i cannot be a problem with the source-codecs. Does anyone have any idea what my problem might be

  • VideoCapture() returns None in opencv & install opencv with ffmpeg

    16 décembre 2017, par Wentai Chen

    System : UBUNTU 16.04
    Python version : 3.5

    I would like to use cv2.VideoCapture() function to process my mp4 file. However, when I run the script below, I always get a result of None, so I am not able to continue my work after.

    import cv2
    
video_cap = cv2.VideoCapture('demo.mp4')
    
ret,frame = video_cap.read()
    
print(ret,frame)
    

    
result: False,None

    By searching a lot I realized the problem : opencv is not properly installed with ffmpeg, so that the video function in opencv does not work.

    However I didn’t find a efficient tutorial on how to properly install opencv. I wonder if anyone could help. Thank you !

  • My webcam works fine, while using cv2.Videocapture() but while trying to read from hard drive it shows error cap.isOpened() returns false, why ?

    27 septembre 2017, par Hu Yang

    import cv2
    video_capture = cv2.VideoCapture("rtsp ://admin:Trust1986_@10.58.94.47:554/h264/ch1/main/av_stream")
    video_capture.isOpened()

    False

    Other information below here, and ffmpeg I had installed.

      Video I/O:
    
    DC1394 1.x:                  NO
    
    DC1394 2.x:                  NO
    
    FFMPEG:                      NO
    
      avcodec:                   NO
    
      avformat:                  NO
    
      avutil:                    NO
    
      swscale:                   NO
    
      avresample:                NO
    
    GStreamer:                   NO
    
    OpenNI:                      NO
    
    OpenNI PrimeSensor Modules:  NO
    
    OpenNI2:                     NO
    
    PvAPI:                       NO
    
    GigEVisionSDK:               NO
    
    Aravis SDK:                  NO
    
    UniCap:                      NO
    
    UniCap ucil:                 NO
    
    V4L/V4L2:                    NO/NO
    
    XIMEA:                       NO
    
    Xine:                        NO
    
    Intel Media SDK:             NO
    
    gPhoto2:                     NO
    

    
root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# ffmpeg -version
    
ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers
    
built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
    
configuration: 
    
libavutil      55. 58.100 / 55. 58.100
    
libavcodec     57. 89.100 / 57. 89.100
    
libavformat    57. 71.100 / 57. 71.100
    
libavdevice    57.  6.100 / 57.  6.100
    
libavfilter     6. 82.100 /  6. 82.100
    
libswscale      4.  6.100 /  4.  6.100
    
libswresample   2.  7.100 /  2.  7.100
    
root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# 
    
root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# python3.6m -V
    
Python 3.6.2
    
root@ubuntu:/home/face_recognition/opencv/ffmpeg/ffmpeg-3.3.4# pkg-config --modversion opencv  
    
3.3.0

    what shall I do next step ? Thanks.

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