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• FFmpeg : no image is displayed when broadcasting flv made of speex / mellymoser and libx264

  15 septembre 2013, par wvxvw

  ffmpeg -f alsa -i hw:PCH,0 -f x11grab -s 1920x1200 -r 15 -i :0.0 \
  
      -acodec nellymoser -ar 22050 -ac 1 -audio_preload 1000000 -vcodec libx264 \
  
      -preset fast -pix_fmt yuv420p -s 1280x800 -maxrate 1000k -threads 0 -f flv "$URL"

  This is the command I'm using, but I don't get any visible output, only sound. FFmpeg gives no warnings. What am I doing wrong ?

  ---

  If I remove -audio_preload, the streaming works, but the audio comes with increasing delay (grows about a minute every minute).

  ---

  The output, as per request :

  ffmpeg version 1.0.7 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on May 14 2013 21:59:35 with gcc 4.7.2 (GCC) 20121109 (Red Hat 4.7.2-8)
  
    configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-frei0r --enable-gnutls --enable-libass --enable-libcdio --enable-libcelt --enable-libdc1394 --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
  
    libavutil      51. 73.101 / 51. 73.101
  
    libavcodec     54. 59.100 / 54. 59.100
  
    libavformat    54. 29.104 / 54. 29.104
  
    libavdevice    54.  2.101 / 54.  2.101
  
    libavfilter     3. 17.100 /  3. 17.100
  
    libswscale      2.  1.101 /  2.  1.101
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [alsa @ 0xc5e8e0] Estimating duration from bitrate, this may be inaccurate
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, alsa, from 'hw:PCH,0':
  
    Duration: N/A, start: 1379234523.677560, bitrate: 1536 kb/s
  
      Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
  
  [x11grab @ 0xc6cda0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1920 height: 1200
  
  [x11grab @ 0xc6cda0] shared memory extension found
  
  [x11grab @ 0xc6cda0] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, x11grab, from ':0.0':
  
    Duration: N/A, start: 1379234523.843273, bitrate: 1105920 kb/s
  
      Stream #1:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1200, 1105920 kb/s, 15 tbr, 1000k tbn, 15 tbc
  
  [libx264 @ 0xc59e00] VBV maxrate specified, but no bufsize, ignored
  
  [libx264 @ 0xc59e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
  
  [libx264 @ 0xc59e00] profile High, level 3.2
  
  [libx264 @ 0xc59e00] 264 - core 128 r2223 f6a8615 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 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=1 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, flv, to 'rtmp://live.justin.tv/app/live_key':
  
    Metadata:
  
      encoder         : Lavf54.29.104
  
      Stream #0:0: Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 1280x800, q=-1--1, 1k tbn, 15 tbc
  
      Stream #0:1: Audio: nellymoser ([6][0][0][0] / 0x0006), 22050 Hz, mono, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (rawvideo -> libx264)
  
    Stream #0:0 -> #0:1 (pcm_s16le -> nellymoser)
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0xc5e8e0] ALSA buffer xrun.

• How to transmux ismv file to mp4

  21 septembre 2013, par Priyal

  I wanted to convert ismv file to mp4 without any packet loss.

  I tried it with ffmpeg as :

  ffmpeg -i input.ismv output.mp4

  But the resultant mp4 file has some packet/frame loss due which video is distracted.

  ffmpeg command line return the following :

  Metadata: major_brand : isml minor_version : 1 compatible_brands: piffiso2 Duration: 00:03:57.18, start: 0.000000, bitrate: 1612 kb/s 
  
  Stream #0:0(und): Audio: wmapro (b[1][0][0] / 0x0162), 44100 Hz, stereo, fltp, 64 kb/s (default)Metadata: creation_time : 2013-09-20 06:18:40 handler_name : Audio 
  
  
  
  Stream #0:1(und): Video: vc1 (Advanced) (vc-1 / 0x312D6376), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1343 kb/s, 30 tbr, 10000k tbn, 60 tbc (default) Metadata: creation_time : 2013-09-20 06:18:40
  
  
  
  Video Stream #0:2(und): Video: vc1 (Advanced) (vc-1 / 0x312D6376), yuv420p, 480x360 [SAR 1:1 DAR 4:3], 887 kb/s, 30 fps, 30 tbr, 10000k tbn, 60 tbc (default) Metadata: creation_time : 2013-09-20 06:18:40 handler_name : Video 
  
  
  
  Stream #0:3(und): Video: vc1 (Advanced) (vc-1 / 0x312D6376), yuv420p, 364x27 2 [SAR 136:136 DAR 91:68], 599 kb/s, 30 fps, 30 tbr, 10000k tbn, 60 tbc (default ) Metadata: creation_time : 2013-09-20 06:18:40 handler_name : Video 
  
  
  
  Stream #0:4(und): Video: vc1 (Advanced) (vc-1 / 0x312D6376), yuv420p, 276x20 8 [SAR 207:208 DAR 14283:10816], 400 kb/s, 30 fps, 30 tbr, 10000k tbn, 60 tbc (d efault) Metadata: creation_time : 2013-09-20 06:18:40 handler_name : Video
  
  
  
  [wmapro @ 003fa000] Channel transform bit is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented. 
  
  
  
  Error while decoding stream #0:0: Invalid data found when processing input [wmapro @ 003fa000] frame[0] would have to skip -9 bits[wmapro @ 003fa000] Packet loss detected! seq e vs d [wmapro @ 003fa000] Packet loss detected! seq d vs f [wmapro @ 003fa000] Reserved bit is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented

• webm local udp streaming using FFMPEG

  1er octobre 2013, par siniv

  I was just started to use ffmpeg recently and stumbled on this streaming problem.
  Scenario : i want to live stream a webcam in local network. Both server and client will be using windows platform.

  Current feasible solution : using ffmpeg simple command line

  to test it quickly i tried to locally stream it (the input doesn't really matter btw in this question).

   On server -> ffmpeg -f dshow -i video="cam1":audio="mic1" -r 30 -g 0 -vcodec h264 -acodec libmp3lame -tune zerolatency -preset ultrafast -f mpegts udp://localhost:6789
  
   On client(the same computer) -> ffplay udp://localhost:6789

  The above works just fine, except for the latency, which i'm getting at about 1-2 second delay.

  Now i want to try to change the encoder to use libvpx (vp8) for video and vorbis for audio (i changed the input to a pre-recorded h264 video, but it really doesn't matter)

   On server 
  
      >ffmpeg -i "suits.mp4" -r 30 -g 0 -vcodec libvpx -acodec vorbis -strict -2 -f webm -f mpegts udp://localhost:6789
  
       On client(the same computer) -> ffplay udp://localhost:6789
  
  However this doesn't work... And below are console outputs:
  
      > onserver ->
  
      > ffmpeg version N-56165-gae12d65 Copyright (c) 2000-2013 the FFmpeg
  
      > developers   built on Sep 10 2013 19:42:46 with gcc 4.7.3 (GCC)  
  
      > configuration: --enable-gpl --enable-version3 --disable-w32threads
  
      > --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib   libavutil      52. 43.100 / 52. 43.100   libavcodec     55. 31.101 / 55. 31.101   libavformat    55. 16.102 / 55. 16.102   libavdevice    55.  3.100 / 55.  3.100   libavfilter     3. 84.100 /  3. 84.100   libswscale      2.  5.100 / 
  
      > 2.  5.100   libswresample   0. 17.103 /  0. 17.103   libpostproc    52.  3.100 / 52.  3.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Suits.mp4':   Metadata:
  
      >     major_brand     : isom
  
      >     minor_version   : 1
  
      >     compatible_brands: isom
  
      >     creation_time   : 2011-09-08 11:43:25   Duration: 00:42:14.87, start: 0.000000, bitrate: 882 kb/s
  
      >     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 720x402 [SAR 1:1 DAR 120:67], 750 kb/s, 23.98 fps,
  
      > 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      >     Metadata:
  
      >       creation_time   : 2011-09-08 11:43:25
  
      >     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 126 kb/s (default)
  
      >     Metadata:
  
      >       creation_time   : 2011-09-08 11:43:25 [libvpx @ 05392a80] v1.2.0 Output #0, mpegts, to 'udp://localhost:6789':   Metadata:
  
      >     major_brand     : isom
  
      >     minor_version   : 1
  
      >     compatible_brands: isom
  
      >     encoder         : Lavf55.16.102
  
      >     Stream #0:0(und): Video: vp8 (libvpx), yuv420p, 720x402 [SAR 1:1 DAR 120:67], q=-1--1, 200 kb/s, 90k tbn, 30 tbc (default)
  
      >     Metadata:
  
      >       creation_time   : 2011-09-08 11:43:25
  
      >     Stream #0:1(und): Audio: vorbis, 48000 Hz, stereo, fltp (default)
  
      >     Metadata:
  
      >       creation_time   : 2011-09-08 11:43:25 Stream mapping:   Stream #0:0 -> #0:0 (h264 -> libvpx)   Stream #0:1 -> #0:1 (aac -> vorbis) Press [q] to stop, [?] for help frame=42535 fps= 51 q=0.0 Lsize= 
  
      > 143539kB time=00:23:38.28 bitrate= 829.1kbits/s dup=8541 drop=0    
  
      > video:99155kB audio:28125kB subtitle:0 global headers:3kB muxing
  
      > overhead 12.772155% Received signal 2: terminating.
  
  
  
  > on client    
  
  > ffplay version N-56165-gae12d65 Copyright (c) 2003-2013 the FFmpeg
  
  > developers   built on Sep 10 2013 19:42:46 with gcc 4.7.3 (GCC)  
  
  > configuration: --enable-gpl --enable-version3 --disable-w32threads
  
  > --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib   libavutil      52. 43.100 / 52. 43.100   libavcodec     55. 31.101 / 55. 31.101   libavformat    55. 16.102 / 55. 16.102   libavdevice    55.  3.100 / 55.  3.100   libavfilter     3. 84.100 /  3. 84.100   libswscale      2.  5.100 / 
  
  > 2.  5.100   libswresample   0. 17.103 /  0. 17.103   libpostproc    52.  3.100 / 52.  3.100
  
  >     nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   [mpegts @ 02eb8620] probed stream 0 failed
  
  >     nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   [mp3 @ 02ed75a0] Header missing
  
  >     Last message repeated 1 times [mp3 @ 02ed75a0] Header missing
  
  >     La    Last message repeated 13 times
  
  >     nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   [mp3 @ 02ed75a0] Header missing  Last message repeated 13 times
  
  >     nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   [mp3 @ 02ed75a0] Header missing    Last message repeated 9 times
  
  >     nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   [mp3 @ 02ed75a0] Header missing [mpegts @ 02eb8620] decoding for
  
  > stream 1 failed [mpegts @ 02eb8620] Could not find codec parameters
  
  > for stream 0 (Unknown: none ([6][0][0][0] / 0x0006)): unknown codec
  
  > Consider increasing the value for the 'analyzeduration' and
  
  > 'probesize' options [mpegts @ 02eb8620] Could not find codec
  
  > parameters for stream 1 (Audio: mp3 ([6][0][0][0] / 0x0006), 0
  
  > channels, s16p): unspecified frame size Consider increasing the value
  
  > for the 'analyzeduration' and 'probesize' options
  
  > udp://localhost:6789: could not find codec parameters

  So does the point to point streaming for ffmpeg just doesn't work for vp8 or am i missing something ? Btw, the end goal is to create a similar video chat based framework and i'll appreciate any suggestion. I'm reading up on webRTC now.