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• ffmpeg concatenate clips with broken timecode

  19 septembre 2018, par Linus679

  I’ve just received some Blackmagic footage and some of the clips are separated into chunks because of dropped frames. So let’s say I have a set of clips that looks like below for a Clip 12.

  0100_C0012_001,
  0100_C0012_002,
  0100_C0012_003,

  Is there a way to create new clip from the 3 with the name 0100_C0012 ? Also, I have to actually concatenate the clips via timecode rather then the name as the numbers seems to break at points for some reason.

  Thanks for any help.

  The info about one of the clips is as follows :

    built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '///F_2_2018-07-06_1208_C0012_V1-0002.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2018-09-18T06:53:01.000000Z
  
      timecode        : 12:08:36:15
  
    Duration: 00:00:08.00, start: 0.000000, bitrate: 36177 kb/s
  
      Stream #0:0(eng): Video: dnxhd (DNXHD) (AVdn / 0x6E645641), yuv422p(pc, bt709), 1920x1080, 36175 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24k tbn, 24k tbc (default)
  
      Metadata:
  
        creation_time   : 2018-09-18T06:53:01.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Avid DNxHD Codec
  
      Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-09-18T06:53:02.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        timecode        : 12:08:36:15
  
  At least one output file must be specified

• Streaming by ffserver and ffmpeg on RaspberryPi

  15 septembre 2018, par saitoib

  I want to ditribute the video of the UVC Camera on Rpsberry Pi
  I edited /etc/ffserver.conf as follows.

  HTTPPort 8090
  
  HTTPBindAddress 0.0.0.0
  
  MaxHTTPConnections 20
  
  MaxClients 10
  
  MaxBandwidth 500000
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 50M
  
  </feed>
  
  
  
  <stream>
  
  Format status
  
  ACL allow 192.168.12.0 192.168.12.255
  
  </stream>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format mpeg
  
  VideoSize hd720
  
  VideoFrameRate 15
  
  VideoBitRate 4096
  
  VideoBufferSize 4096
  
  VideoQMin 5
  
  VideoQMax 51
  
  Strict -1
  
  </stream>

  Then, I started ffserver
  Next, I executed the following command

  ffmpeg -f v4l2 -s 1280x720 -i /dev/video0 -ac 1 -f alsa -i hw:1,0 http://localhost:8090/feed1.ffm

  I requested 192.168.12.101 : 8090 / test.mpeg from FireFox on the same network,
  but no video is displayed and a program to open or a file save dialog opens.

  What should I do ?

  Execution result of Raspberry Pi

  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 519134.790720, bitrate: 147456 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 147456 kb/s, 10 fps, 10 tbr, 1000k tbn, 1000k tbc
  
  Guessed Channel Layout for Input Stream #1.0 : mono
  
  Input #1, alsa, from 'hw:1,0':
  
    Duration: N/A, start: 1536994777.250578, bitrate: 768 kb/s
  
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
  [tcp @ 0x23ec7f0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  
  [tcp @ 0x2401d50] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
    Metadata:
  
      creation_time   : now
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: mp2, 22050 Hz, mono, s16, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 mp2
  
      Stream #0:1: Video: mpeg1video, yuv420p, 1280x720, q=5-51, 4096 kb/s, 10 fps, 1000k tbn, 15 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 mpeg1video
  
      Side data:
  
        cpb: bitrate max/min/avg: 8192000/0/4096000 buffer size: 33554432 vbv_delay: -1
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (pcm_s16le (native) -> mp2 (native))
  
    Stream #0:0 -> #0:1 (rawvideo (native) -> mpeg1video (native))
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0x23ebee0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun. 48kB time=00:00:00.13 bitrate=2949.1kbits/s dup=3 drop=0 speed=0.251x
  
  [video4linux2,v4l2 @ 0x23ea230] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun.276kB time=00:00:02.40 bitrate= 942.1kbits/s dup=30 drop=0 speed=0.201x
  
  Sat Sep 15 15:59:55 2018 [mpeg @ 0xf136d0]VBV buffer size not set, using default size of 130KB speed=0.844x
  
  If you want the mpeg file to be compliant to some specification
  
  Like DVD, VCD or others, make sure you set the correct buffer size
  
  frame=  107 fps=3.1 q=2.0 Lsize=     856kB time=00:00:14.06 bitrate= 498.6kbits/s dup=80 drop=0 speed=0.413x
  
  video:844kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.120285%
  
  Sat Sep 15 16:00:11 2018 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 876544
  
  Sat Sep 15 16:00:11 2018 [mpeg @ 0xf136d0]buffer underflow st=0 bufi=0 size=418
  
  Sat Sep 15 16:00:11 2018 192.168.12.150 - - [GET] "/test.mpeg HTTP/1.1" 200 29263
  
  Exiting normally, received signal 2.

  Result of 192.168.12.101:8090

  ffserver Status
  
  Available Streams
  
  Path    Served
  
  Conns   
  
  bytes   Format  Bit rate
  
  kbit/s  Video
  
  kbit/s  
  
  Codec   Audio
  
  kbit/s  
  
  Codec   Feed
  
  index.html  1   0   -   -   -       -   
  
  test.mpeg   0   0   mpeg    4160    4096    mpeg1video  64  mp2     feed1.ffm
  
  Feed feed1.ffm
  
  Stream  type    kbit/s  codec   Parameters
  
  0   audio   64  mp2 1 channel(s), 22050 Hz
  
  1   video   4096    mpeg1video  1280x720, q=5-51, fps=15
  
  Connection Status
  
  Number of connections: 1 / 10
  
  Bandwidth in use: 0k / 10000k
  
  #   File    IP  Proto   State   Target bit/s    Actual bit/s    Bytes transferred
  
  1   index.html  192.168.12.150  HTTP/1.1    HTTP_WAIT_REQUEST   0   0   0 

• FFMPEG convert from MP3 to M4A- Getting errors

  4 juin 2021, par JK81

  I'm working on Windows 10 x64, build ffmpeg-20180916-5109c38-win64-static.

  



  I have a folder of MP3 audio files that I want to convert to M4A.

  



  This is the command that I'm running :

  



  FOR /F "tokens=*" %G IN ('dir /b *.mp3') DO ffmpeg -i "%G" -map_metadata 0 -c:a aac -b:a 192000 "%~nG.m4a"

  



  This scans my bin filder and converts all files. This works great for converting video files from MOV to MP4 (using a different code string) but I keep getting errors such as :
[ipod @ 0000025507991b40] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 0000025507e45180] using SAR=1/1
[libx264 @ 0000025507e45180] MB rate (129960000) > level limit (16711680)
[libx264 @ 0000025507e45180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0000025507e45180] profile High 4:4:4 Predictive, level 6.2, 4:4:4, 8-bit
[libx264 @ 0000025507e45180] 264 - core 157 r2932 303c484 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[ipod @ 0000025507991b40] Could not find tag for codec h264 in stream #0, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:1 --
[aac @ 0000025507e60100] Qavg: nan
Conversion failed!

  



  What's the best way to convert to M4A ? I'm doing this to reduce disk space.