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• How to remove "wrting library" from an MP3 file using ffmpeg ?

  3 septembre 2022, par aveceux

  I tried to remove the "writing library" entry from some of my mp3 files with ffmpeg, and this is the command I used :

  



  ffmpeg -i input.mp3 -map_metadata -1 -c copy output.mp3


  



  The command removed all the other tags, but the "writing library" still remained intact.

  



  I've also tried other mp3 tag editing tools, but none of them did the job.

  



  Here's the mediainfo of an example mp3 file :

  



  Format                         : MPEG Audio
File size                      : 32.1 MiB
Duration                       : 1 h 9 min
Overall bit rate mode          : Variable
Overall bit rate               : 64.0 kb/s
Writing library                : LAMEUUULAME3.91
Cover                          : Yes
Cover MIME                     : image/jpeg

Audio
Format                         : MPEG Audio
Format version                 : Version 1
Format profile                 : Layer 3
Format settings                : Joint stereo / MS Stereo
Duration                       : 1 h 9 min
Bit rate mode                  : Variable
Bit rate                       : 64.0 kb/s
Channel(s)                     : 2 channels
Sampling rate                  : 44.1 kHz
Frame rate                     : 38.281 FPS (1152 SPF)
Compression mode               : Lossy
Stream size                    : 31.9 MiB (100%)
Writing library                : LAMEUUULAME3.91


  



  Any help would be greatly appreciated. Thank you.

  


• Ffmpeg live streaming to Youtube - "Connect streaming software to start preview"

  10 septembre 2019, par Zoltan Fedor

  I have an rtsp feed (H.265) which I am trying to stream to YouTube Live, but whatever I do YouTube Studio just showing the waiting icon with "Connect streaming software to start preview".

  .sh file for streaming :

  VBR="1000k"
  
  FPS="30"
  
  QUAL="ultrafast"
  
  YOUTUBE_URL="rtmp://b.rtmp.youtube.com/live2"
  
  SOURCE="rtsp://qhatever.org:8555/whatever.sdp"      
  
  KEY="xxxx-xxxx-xxxx-xxxx"
  
  
  
  ~/ffmpeg-git-20190905-amd64-static/ffmpeg \
  
      -thread_queue_size 512 \
  
      -rtsp_transport tcp -i "$SOURCE" \
  
      -f lavfi -i anullsrc \
  
      -vcodec libx264 -pix_fmt yuvj420p -preset $QUAL -r $FPS -g $(($FPS * 2)) -b:v 2250k -minrate $VBR -maxrate 6000k -bufsize 6000k -keyint_min 60 \
  
      -acodec libmp3lame -ar 44100 -b:a 128k \
  
      -f flv "$YOUTUBE_URL/$KEY"

  Ffmpeg’s output :

  ffmpeg version N-49800-g2b66c757d6-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  
    libavutil      56. 35.100 / 56. 35.100
  
    libavcodec     58. 56.101 / 58. 56.101
  
    libavformat    58. 32.104 / 58. 32.104
  
    libavdevice    58.  9.100 / 58.  9.100
  
    libavfilter     7. 58.102 /  7. 58.102
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, rtsp, from 'rtsp://whatever.org:8555/whatever.sdp':
  
    Metadata:
  
      title           : streamed by the Rtsp Server
  
      comment         : RTSP_STREAM_0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: hevc (Main), yuvj420p(pc, bt709), 1920x1080, 30 fps, 30 tbr, 90k tbn, 30 tbc
  
      Stream #0:1: Data: none
  
  Input #1, lavfi, from 'anullsrc':
  
    Duration: N/A, start: 0.000000, bitrate: 705 kb/s
  
      Stream #1:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (pcm_u8 (native) -> mp3 (libmp3lame))
  
  Press [q] to stop, [?] for help
  
  [hevc @ 0x5fbfd80] Could not find ref with POC 4
  
  [libx264 @ 0x5fb9d80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x5fb9d80] profile Constrained Baseline, level 4.0, 4:2:0, 8-bit
  
  [libx264 @ 0x5fb9d80] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=60 keyint_min=31 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=abr mbtree=0 bitrate=2250 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=6000 vbv_bufsize=6000 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
  
  Output #0, flv, to 'rtmp://b.rtmp.youtube.com/live2/xxxx-xxxx-xxxx-xxxx':
  
    Metadata:
  
      title           : streamed by the Rtsp Server
  
      comment         : RTSP_STREAM_0
  
      encoder         : Lavf58.32.104
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuvj420p(pc, progressive), 1920x1080, q=-1--1, 2250 kb/s, 30 fps, 1k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc58.56.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 6000000/0/2250000 buffer size: 6000000 vbv_delay: N/A
  
      Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, stereo, s16p, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc58.56.101 libmp3lame
  
  frame= 522 fps=31 q=19.0 size=  8802Kb time=00:00:36:53 bitrate 2481.0kbits/s dup= drop=2 speed=1.01x

  Basically all looks good to me - still, in YouTube Studio only the waiting icon with the "Connect streaming software to start preview" message is visible, not video feed.

  Any ideas ?

• ffmpeg covert yuv to mp4 failed :"Invalid buffer size, packet size"

  3 janvier 2020, par Sean

  Hi I am trying to convert YUV video to a avi formt with the following command :
  "ffmpeg -f rawvideo -vcodec rawvideo -s 512x512 -r 25 -pix_fmt yuv420p -i output3.yuv -c:v libx264 -preset ultrafast -qp 0 output.avi"

  Then I got an error

  [rawvideo @ 0x1c9e620] Estimating duration from bitrate, this may be inaccurate
Input #0, rawvideo, from 'output3.yuv':
 Duration: 00:00:01.72, start: 0.000000, bitrate: 79250 kb/s
   Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 512x512, 78643 kb/s, 25 tbr, 25 tbn, 25 tbc
File 'output.avi' already exists. Overwrite ? [y/N] y
[libx264 @ 0x1ca93e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x1ca93e0] profile High 4:4:4 Predictive, level 3.0, 4:2:0 8-bit
Output #0, avi, to 'output.avi':
 Metadata:
   ISFT            : Lavf56.40.101
   Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p, 512x512, q=-1--1, 25 fps, 25 tbn, 25 tbc
   Metadata:
     encoder         : Lavc56.60.100 libx264
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[rawvideo @ 0x1ca7fa0] **Invalid buffer size, packet size 130560 < expected frame_size 393216**
**Error while decoding stream #0:0: Invalid argument**
frame=   43 fps=0.0 q=-1.0 Lsize=    8389kB time=00:00:01.72 bitrate=39954.8kbits/s<br />
video:8382kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.078511%

  Any help will be appreciated.

  Thanks.