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  • ffmpeg - avcodec_decode_audio3 always returns 0 with aac decoding on android

    26 novembre 2011, par Android007

    I am writing an audio decoder based on ffmpeg for android, where I have to decode aac audio, but because of some reason it always returns 0 bytes decoded.

    Looks like I pass everything right. Can anybody tell me what went wrong in my case.I copied code from ffplay.c. What is the reason avcodec_decode_audio3 function always returns zero?

    Here is the code from ffplay.c :

    AVPacket *pkt_temp = &is->audio_pkt_temp;
    AVPacket *pkt = &is->audio_pkt;
    AVCodecContext *dec= is->audio_st->codec;
    int n, len1, data_size;
    double pts;

          data_size = sizeof(is->audio_buf1);
        len1 = avcodec_decode_audio3(dec, (int16_t *)is->audio_buf1, &data_size, pkt_temp);
        if (len1 < 0) {
            pkt_temp->size = 0;
            break;
        } 

       if (data_size <= 0){
                   //This block always gets executed.
            continue;
    }

  • FFMpeg and WebM/VP8

    25 novembre 2011, par Anand Suresh

    I am trying to use ffmpeg and ffserver to stream VP8 video.

    I am using the following command to start FFMpeg:

    ffmpeg -v 9 -loglevel 99 -f x11grab -s 1440x900 -r2 -i :0.0 -f webm http://localhost:8090/feed1.ffm

    The above command abruptly terminates generating the following error:

    > FFmpeg version 0.6.2-4:0.6.2-1ubuntu1.1, Copyright (c) 2000-2010 the Libav developers
  built on Sep 16 2011 16:57:46 with gcc 4.5.2
  configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
  WARNING: library configuration mismatch
  libavutil   configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavcodec  configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavformat configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavdevice configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavfilter configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libswscale  configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libpostproc configuration: --extra-version=4:0.6.2-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0
[x11grab @ 0x9869420]device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1440 height: 900
[x11grab @ 0x9869420]shared memory extension  found
[x11grab @ 0x9869420]Probe buffer size limit 5000000 reached
[x11grab @ 0x9869420]Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0':
  Duration: N/A, start: 1322253753.374957, bitrate: 41472 kb/s
    Stream #0.0, 1, 1/1000000: Video: rawvideo, bgra, 1440x900, 1/1, 41472 kb/s, 1 tbr, 1000k tbn, 1 tbc
[libvpx @ 0x9876540]v0.9.6
[libvpx @ 0x9876540]--enable-pic --enable-shared --disable-install-bins --disable-install-srcs --target=x86-linux-gcc
[libvpx @ 0x9876540]vpx_codec_enc_cfg
[libvpx @ 0x9876540]generic settings
  g_usage:                      0
  g_threads:                    0
  g_profile:                    0
  g_w:                          320
  g_h:                          240
  g_timebase:                   {1/30}
  g_error_resilient:            0
  g_pass:                       0
  g_lag_in_frames:              0
[libvpx @ 0x9876540]rate control settings
  rc_dropframe_thresh:          0
  rc_resize_allowed:            0
  rc_resize_up_thresh:          60
  rc_resize_down_thresh:        30
  rc_end_usage:                 0
  rc_twopass_stats_in:          (nil)(0)
  rc_target_bitrate:            256
[libvpx @ 0x9876540]quantizer settings
  rc_min_quantizer:             4
  rc_max_quantizer:             63
[libvpx @ 0x9876540]bitrate tolerance
  rc_undershoot_pct:            95
  rc_overshoot_pct:             200
[libvpx @ 0x9876540]decoder buffer model
  rc_buf_sz:                    6000
  rc_buf_initial_sz:            4000
  rc_buf_optimal_sz:            5000
[libvpx @ 0x9876540]2 pass rate control settings
  rc_2pass_vbr_bias_pct:        50
  rc_2pass_vbr_minsection_pct:  0
  rc_2pass_vbr_maxsection_pct:  400
[libvpx @ 0x9876540]keyframing settings
  kf_mode:                      1
  kf_min_dist:                  0
  kf_max_dist:                  9999
[libvpx @ 0x9876540]
[libvpx @ 0x9876540]vpx_codec_enc_cfg
[libvpx @ 0x9876540]generic settings
  g_usage:                      0
  g_threads:                    1
  g_profile:                    0
  g_w:                          1440
  g_h:                          900
  g_timebase:                   {1/1}
  g_error_resilient:            0
  g_pass:                       0
  g_lag_in_frames:              0
[libvpx @ 0x9876540]rate control settings
  rc_dropframe_thresh:          0
  rc_resize_allowed:            0
  rc_resize_up_thresh:          60
  rc_resize_down_thresh:        30
  rc_end_usage:                 0
  rc_twopass_stats_in:          (nil)(0)
  rc_target_bitrate:            200
[libvpx @ 0x9876540]quantizer settings
  rc_min_quantizer:             1
  rc_max_quantizer:             38
[libvpx @ 0x9876540]bitrate tolerance
  rc_undershoot_pct:            95
  rc_overshoot_pct:             200
[libvpx @ 0x9876540]decoder buffer model
  rc_buf_sz:                    6000
  rc_buf_initial_sz:            4000
  rc_buf_optimal_sz:            5000
[libvpx @ 0x9876540]2 pass rate control settings
  rc_2pass_vbr_bias_pct:        50
  rc_2pass_vbr_minsection_pct:  0
  rc_2pass_vbr_maxsection_pct:  400
[libvpx @ 0x9876540]keyframing settings
  kf_mode:                      1
  kf_min_dist:                  0
  kf_max_dist:                  12
[libvpx @ 0x9876540]
[libvpx @ 0x9876540]vpx_codec_control
[libvpx @ 0x9876540]  VP8E_SET_CPUUSED:             3
[libvpx @ 0x9876540]  VP8E_SET_NOISE_SENSITIVITY:   0
Output #0, webm, to 'http://127.0.0.1:8090/feed1.ffm':
  Metadata:
    encoder         : Lavf52.64.2
    Stream #0.0, 0, 1/1000: Video: libvpx, yuv420p, 1440x900, 1/1, q=2-31, 200 kb/s, 1k tbn, 1 tbc
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
[webm @ 0x98753b0]Writing block at offset 15, size 158658, pts 0, dts 0, duration 1000, flags 128
[webm @ 0x98753b0]Starting new cluster at offset 158681 bytes, pts 0

    Can anyone point out what I am doing wrong here? Why does ffmpeg die everytime it starts a new cluster?

    Thanks

  • OSX ffmpeg compilation

    24 novembre 2011, par toohtik

    In my OSX project I'm using ffmpeg lib. When I try build project with Release configuration XCode can't link with ffmpeg library:

    libavformat.a, file was built for archive which is not the architecture being linked (i386)

    But I can't compile ffmpeg for i386. I have tried many variants of configuration flags (./configure --arch=i386 etc. ), but without success.

  • ffmpeg or mencoder to add audio to avi with audio

    24 novembre 2011, par bastardz

    Can I add audio to file which already has audio. I have avi with couple of sound fx and now I want to add loop in the background. I've tried mencoder test.avi -o out.avi -ovc copy -oac mp3lame -audiofile loop.mp3 but it adds loop instead existing audio in test.avi

  • how can I enable CRCs in EZstream or FFMPEG ?

    24 novembre 2011, par Nadal

    I want to detect a corrupt MP3 stream, the encoder is using CRC.

    How can I enable CRC?. I want to be able to read through the headers of each frame to find the CRC, and then run it on the audio data. In the event I get an error (or several frames with errors), I can then somehow trigger a warning.

    I am new to this so I can't tell what to do or how to accomplish this.

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