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Sur d’autres sites (8914)

  • 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.

  • Streaming output of x264_encoder_encode

    11 octobre 2013, par user2660369

    how can I stream the output of x264_encoder_encode over UDP ?

    This is my Init_x264-function :

    x264_param_t param;
    
x264_param_default_preset(&param, "veryfast", "zerolatency");
    
param.i_threads = 1;
    
param.i_width = width;
    
param.i_height = height;
    
param.i_fps_num = 30;
    
param.i_fps_den = 1;
    

    
param.i_keyint_max = 30;
    
param.b_intra_refresh = 1;
    

    
param.rc.i_rc_method = X264_RC_CRF;
    
param.rc.f_rf_constant = 25;
    
param.rc.f_rf_constant_max = 35;
    

    
param.b_annexb = 1;
    
param.b_repeat_headers = 1;
    

    
param.i_log_level = X264_LOG_DEBUG;
    

    
x264_param_apply_profile(&param, "baseline");
    

    
encoder = x264_encoder_open(&param);
    

    
picIn = new x264_picture_t;
    
picOut = new x264_picture_t;
    
x264_picture_alloc(picIn, X264_CSP_I420, width, height);
    
x264_encoder_parameters(encoder, &param);

    Now instead of saving the output of x264_encoder_encode to disk (using fwrite) I tried to just send it over UDP to my destination. I tried to play it with avplay, but it fails :

    [h264 @ 0x7f83f0012e80] non-existing PPS 0 referenced
    
[h264 @ 0x7f83f0012e80] decode_slice_header error
    
[h264 @ 0x7f83f0012e80] no frame!
    
[h264 @ 0x7f83f0012e80] non-existing PPS 0 referenced
    
[h264 @ 0x7f83f0012e80] decode_slice_header error
    
[h264 @ 0x7f83f0012e80] no frame!

    With vlc I got different error messages, mostly about missing headers.

  • Streaming output of x264_encoder_encode

    11 octobre 2013, par user2660369

    how can I stream the output of x264_encoder_encode over UDP ?

    This is my Init_x264-function :

    x264_param_t param;
    
x264_param_default_preset(&param, "veryfast", "zerolatency");
    
param.i_threads = 1;
    
param.i_width = width;
    
param.i_height = height;
    
param.i_fps_num = 30;
    
param.i_fps_den = 1;
    

    
param.i_keyint_max = 30;
    
param.b_intra_refresh = 1;
    

    
param.rc.i_rc_method = X264_RC_CRF;
    
param.rc.f_rf_constant = 25;
    
param.rc.f_rf_constant_max = 35;
    

    
param.b_annexb = 1;
    
param.b_repeat_headers = 1;
    

    
param.i_log_level = X264_LOG_DEBUG;
    

    
x264_param_apply_profile(&param, "baseline");
    

    
encoder = x264_encoder_open(&param);
    

    
picIn = new x264_picture_t;
    
picOut = new x264_picture_t;
    
x264_picture_alloc(picIn, X264_CSP_I420, width, height);
    
x264_encoder_parameters(encoder, &param);

    Now instead of saving the output of x264_encoder_encode to disk (using fwrite) I tried to just send it over UDP to my destination. I tried to play it with avplay, but it fails :

    [h264 @ 0x7f83f0012e80] non-existing PPS 0 referenced
    
[h264 @ 0x7f83f0012e80] decode_slice_header error
    
[h264 @ 0x7f83f0012e80] no frame!
    
[h264 @ 0x7f83f0012e80] non-existing PPS 0 referenced
    
[h264 @ 0x7f83f0012e80] decode_slice_header error
    
[h264 @ 0x7f83f0012e80] no frame!

    With vlc I got different error messages, mostly about missing headers.

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