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• ffmpeg not finding audio streams ?

  24 septembre 2013, par Jim Miller

  I'm doing some video conversion with ffmpeg v. N-54271-g7f866c1 (a fresh pull from the git sources in late June 2013) on Fedora 19. One of the things I want to do is to concatenate two videos and then convert the result to an mp4. The following code is working well for me :

  ffmpeg -i video_a.mov -i video_b.mov -acodec libfaac -vcodec libx264 
  
       -preset fast -crf 22  -s 940x528 -pix_fmt yuv420p 
  
       -filter_complex '[0:1] [0:0] [1:1] [1:0]  concat=n=2:v=1:a=1 [v] [a]' 
  
       -map '[v]' -map '[a]' output.mp4

  except for a couple of older hunks of test video I've been using. On those, ffmpeg isn't finding the audio stream, and so the above call dies with ffmpeg complaining that Stream specifier ':1' in filtergraph description [0:1][0:0][1:1][1:0] concat=n=2:v=1:a=1 [v] [a] matches no streams. The catch, of course, is that there is an audio stream in the video ; it's just not getting found.

  When ffmpeg starts, I get a description of the input like so :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/priv/videorising7/raw_take_video/v2261-MTQxMzgwMDM4NzAx.mov':
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2011-10-13 16:08:18
  
    Duration: 00:00:25.52, start: 0.000000, bitrate: 49 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 608x342, 47 kb/s, 10.03 fps, 10 tbr, 1k tbn, 2k tbc
  
      Metadata:
  
        creation_time   : 2011-10-13 16:08:18
  
        handler_name    : Apple Alias Data Handler

  I suppose the video might just be so old (2006 ?) that I should be lucky that it plays at all. However, I'm able to run these videos through some other ffmpeg jobs (converting from .mov to .mp4, for instance), but those don't require explicitly referencing the audio and video tracks. Any insights out there ?

• 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.

• Android FFMPEG command line for video filter

  4 février 2014, par user2568369

  I am using following command to add retro effect in video.

  String[] ffmpegCommand = {"/data/data/com.mobvcasting.mjpegffmpeg/ffmpeg", "-r", ""+p.getPreviewFrameRate(), "-b", "1000000", "-vcodec", "mjpeg", "-i", Environment.getExternalStorageDirectory().getPath() + "/com.mobvcasting.mjpegffmpeg/frame_%05d.jpg","-vcodec", "mjpeg", "-acodec","libfaac","-vf","curves=vintage", "-qscale", "3", "-async", "1", "-y",Environment.getExternalStorageDirectory().getPath() + "/com.mobvcasting.mjpegffmpeg/video.mp4"};
  
  
  
  ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();            
  
  
  
  BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));

  but I am getting following error :

  09-02 13:42:57.343: V/MJPEG_FFMPEG(2346): Finished Writing Frame
  
  09-02 13:42:57.351: V/MJPEG_FFMPEG(2346): Recording Stopped
  
  09-02 13:42:57.414: V/MJPEG_FFMPEG(2346): ***Starting FFMPEG***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***FFmpeg version UNKNOWN, Copyright (c) 2000-2010 the FFmpeg developers***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  built on Jul 28 2011 16:47:07 with gcc 4.4.3***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --sysroot=/Developer/android-ndk-r5b//platforms/android-3/arch-arm --soname-prefix=/data/data/com.mobvcasting.mjpegffmpeg/ --enable-shared --disable-symver --enable-small --optimization-flags=-O2 --enable-encoder=mpeg2video --enable-encoder=nellymoser --enable-protocol=file --prefix=../build/ffmpeg/armeabi --extra-cflags= --extra-ldflags=***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavutil     50.34. 0 / 50.34. 0***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavcore      0.16. 0 /  0.16. 0***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavcodec    52.99. 1 / 52.99. 1***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavformat   52.88. 0 / 52.88. 0***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavdevice   52. 2. 2 / 52. 2. 2***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libavfilter    1.69. 0 /  1.69. 0***
  
  09-02 13:42:57.460: V/MJPEG_FFMPEG(2346): ***  libswscale     0.12. 0 /  0.12. 0***
  
  
  
  09-02 13:42:57.648: V/MJPEG_FFMPEG(2346): ***Input #0, image2, from '/mnt/sdcard/com.mobvcasting.mjpegffmpeg/frame_%05d.jpg':***
  
  09-02 13:42:57.656: V/MJPEG_FFMPEG(2346): ***  Duration: 00:00:01.83, start: 0.000000, bitrate: N/A***
  
  09-02 13:42:57.656: V/MJPEG_FFMPEG(2346): ***    Stream #0.0: Video: mjpeg, yuvj420p, 320x240 [PAR 1:1 DAR 4:3], 30 fps, 30 tbr, 30 tbn, 30 tbc***
  
  09-02 13:42:57.695: V/MJPEG_FFMPEG(2346): ***[buffer @ 0x5d110] w:320 h:240 pixfmt:yuvj420p***
  
  09-02 13:42:57.695: V/MJPEG_FFMPEG(2346): ***No such filter: 'curves'***
  
  09-02 13:42:57.695: V/MJPEG_FFMPEG(2346): ***Error opening filters!***
  
  09-02 13:42:57.695: V/MJPEG_FFMPEG(2346): ***Ending FFMPEG***

  Any help will be highly appreciated.