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Sur d’autres sites (9202)

  • Video encoding and keyframes

    24 février 2013, par Tishu

    I am transcoding a video frame by frame and using x264+ffmpeg to encode. The original video plays fine, but the first few frames of my transcoded vide show grey artefacts. I understand this is because of time compression and these artefacts disappear after a few frames.

    See these two pictures which are the first and second frames. The third frame is normal (i.e. no grey artefact and not blurry like the second one)
    First frame
    Second frame

    How can I force the first frame to be a key frame (ie fully encoded in my output video) so that these artefacts do not show ?

    Edit - more details

    Here is what I am doing more in details. I used bit form differents tutorials to read a video frame by frame and reencode each frame to a new video. My encoding parameters are the following :

    avcodec_get_context_defaults3(c, *codec);
    
c->codec_id = codec_id;
    
c->bit_rate = output_bitrate;
    
/* Resolution must be a multiple of two. */
    
c->width    = output_width;
    
c->height   = output_height;
    
/* timebase: This is the fundamental unit of time (in seconds) in terms
    
 * of which frame timestamps are represented. For fixed-fps content,
    
 * timebase should be 1/framerate and timestamp increments should be
    
 * identical to 1. */
    
st->r_frame_rate.num = output_framerate_num;
    
st->r_frame_rate.den = output_framerate_den;
    
c->time_base.den = output_timebase_den;
    
c->time_base.num = output_timebase_num;
    
c->gop_size      = 3; /* emit one intra frame every twelve frames at most */
    
c->pix_fmt       = STREAM_PIX_FMT;
    
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
    
    /* just for testing, we also add B frames */
    
    c->max_b_frames = 2;
    
}
    
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
    
    /* Needed to avoid using macroblocks in which some coeffs overflow.
    
     * This does not happen with normal video, it just happens here as
    
     * the motion of the chroma plane does not match the luma plane. */
    
    c->mb_decision = 2;
    
}
    
c->max_b_frames = 2;
    
c->scenechange_threshold = 0;
    
c->rc_buffer_size = 0;
    
c->me_method = ME_ZERO;

    Then I process each frame, probably doing something wrong there. The decoding bit :

    while(av_read_frame(gFormatCtx, &packet)>=0) {
    
    // Is this a packet from the video stream?
    
    if(packet.stream_index==gVideoStreamIndex) {
    
        // Decode video frame
    
        avcodec_decode_video2(gVideoCodecCtx, pCurrentFrame, &frameFinished, &packet);
    
        // Did we get a video frame?
    
        if(frameFinished) {
    
            [...]
    
            if(firstPts == -999) /*Initial value*/
    
                firstPts = packet.pts;
    
            deltaPts = packet.pts - firstPts;
    
            double seconds = deltaPts*av_q2d(gFormatCtx->streams[gVideoStreamIndex]->time_base);
    
            [...]
    
            muxing_writeVideoFrame(pCurrentFrame, packet.pts);
    
        }
    
    }
    
}

    The actual writing :

    int muxing_writeVideoFrame(AVFrame *frame, int64_t pts)
    
{
    
frameCount = frameCount +1;
    
if(frameCount > 0)
    
{
    
    if (video_st)
    
        video_pts = (double)video_st->pts.val * video_st->time_base.num /
    
                    video_st->time_base.den;
    
    else
    
        video_pts = 0.0;
    

    
    if (video_st && !(video_st && audio_st && audio_pts < video_pts))
    
    {
    
        frame->pts = pts;//av_rescale_q(frame_count, video_st->codec->time_base, video_st->time_base);
    
        write_video_frame(oc, video_st, frame);
    
    }
    
}
    

    
return 0;
    
}
    

    
static int write_video_frame(AVFormatContext *oc, AVStream *st, AVFrame *frame)
    
{
    
    int ret;
    
    static struct SwsContext *sws_ctx;
    
    //LOGI(10, frame_count);
    
    AVCodecContext *c = st->codec;
    

    
    /* encode the image */
    
    AVPacket pkt;
    
    int got_output;
    
    av_init_packet(&pkt);
    
    pkt.data = NULL;    // packet data will be allocated by the encoder
    
    pkt.size = 0;
    
ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
    
if (ret < 0) {
    
    fprintf(stderr, "Error encoding video frame: %s\n", av_err2str(ret));
    
    exit(1);
    
}
    
/* If size is zero, it means the image was buffered. */
    
if (got_output) {
    
    if (c->coded_frame->key_frame)
    
        pkt.flags |= AV_PKT_FLAG_KEY;
    
    pkt.stream_index = st->index;
    
    /* Write the compressed frame to the media file. */
    
    ret = av_interleaved_write_frame(oc, &pkt);
    
} else {
    
    ret = 0;
    
}
    

    
    if (ret != 0) {
    
        LOGI(10, av_err2str(ret));
    
        exit(1);
    
    }
    
    frame_count++;
    
    return got_output;
    
}

  • Why does the frame count change when scaling with FFmpeg ?

    22 octobre 2016, par ajmicek

    I use this to scale 1920x1080 H.264 videos :

    ffmpeg -i IMG_1438.MOV -threads 2 -vf scale=-2:600 IMG_1438_scaledTo600.MOV

    And it works great ! But here is my question : most of the time, the frame rate stays exactly the same between the original file and the scaled file. For example :

    $ mediainfo -F IMG_1426.MOV | grep Frame\ rate
    
Frame rate                               : 29.970
    
Frame rate                               : 29.970 FPS
    
Frame rate mode                          : VFR
    
Frame rate mode                          : Variable
    
Frame rate                               : 29.970
    
Frame rate                               : 29.970 (29970/1000) FPS
    

    
$ mediainfo -F IMG_1426_scaledTo600.MOV | grep Frame\ rate
    
Frame rate                               : 29.970
    
Frame rate                               : 29.970 FPS
    
Frame rate mode                          : CFR
    
Frame rate mode                          : Constant
    
Frame rate                               : 29.970
    
Frame rate                               : 29.970 (30000/1001) FPS

    But sometimes, the frame rate increases dramatically :

    $ mediainfo -F IMG_1438.MOV | grep Frame\ rate
    
Frame rate                               : 25.044
    
Frame rate                               : 25.044 FPS
    
Frame rate mode                          : VFR
    
Frame rate mode                          : Variable
    
Frame rate                               : 25.044
    
Frame rate                               : 25.044 FPS
    

    
$ mediainfo -F IMG_1438_scaledTo600.MOV | grep Frame\ rate
    
Frame rate                               : 120.000
    
Frame rate                               : 120.000 FPS
    
Frame rate mode                          : CFR
    
Frame rate mode                          : Constant
    
Frame rate                               : 120.000
    
Frame rate                               : 120.000 FPS

    What should I know about FFmpeg or libx264 or libswscale that will help me understand why this happens ? (Hoping to hear from LordNeckbeard, in particular).

    mediainfo IMG_1438.MOV --Full outputs :

    General
    
Count                                    : 327
    
Count of stream of this kind             : 1
    
Kind of stream                           : General
    
Kind of stream                           : General
    
Stream identifier                        : 0
    
Count of video streams                   : 1
    
Count of audio streams                   : 1
    
OtherCount                               : 2
    
Video_Format_List                        : AVC
    
Video_Format_WithHint_List               : AVC
    
Codecs Video                             : AVC
    
Audio_Format_List                        : AAC
    
Audio_Format_WithHint_List               : AAC
    
Audio codecs                             : AAC LC
    
Complete name                            : IMG_1438.MOV
    
File name                                : IMG_1438
    
File extension                           : MOV
    
Format                                   : MPEG-4
    
Format                                   : MPEG-4
    
Format/Extensions usually used           : mp4 m4v m4a m4b m4p 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma f4v
    
Commercial name                          : MPEG-4
    
Format profile                           : QuickTime
    
Internet media type                      : video/mp4
    
Codec ID                                 : qt  
    
Codec ID                                 : qt   0000.00 (qt  )
    
Codec ID/Url                             : http://www.apple.com/quicktime/download/standalone.html
    
CodecID_Version                          : 0000.00
    
CodecID_Compatible                       : qt  
    
Codec                                    : MPEG-4
    
Codec                                    : MPEG-4
    
Codec/Extensions usually used            : mp4 m4v m4a m4b m4p 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma f4v
    
File size                                : 113990140
    
File size                                : 109 MiB
    
File size                                : 109 MiB
    
File size                                : 109 MiB
    
File size                                : 109 MiB
    
File size                                : 108.7 MiB
    
Duration                                 : 52268
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 00:00:52.268
    
Duration                                 : 00:00:52:09
    
Duration                                 : 00:00:52.268 (00:00:52:09)
    
Overall bit rate                         : 17447026
    
Overall bit rate                         : 17.4 Mb/s
    
Frame rate                               : 25.044
    
Frame rate                               : 25.044 FPS
    
Frame count                              : 1309
    
Stream size                              : 56670
    
Stream size                              : 55.3 KiB (0%)
    
Stream size                              : 55 KiB
    
Stream size                              : 55 KiB
    
Stream size                              : 55.3 KiB
    
Stream size                              : 55.34 KiB
    
Stream size                              : 55.3 KiB (0%)
    
Proportion of this stream                : 0.00050
    
HeaderSize                               : 28
    
DataSize                                 : 113966271
    
FooterSize                               : 23841
    
IsStreamable                             : No
    
Encoded date                             : UTC 2016-10-08 22:51:19
    
Tagged date                              : UTC 2016-10-08 22:52:12
    
File last modification date              : UTC 2016-10-08 22:51:19
    
File last modification date (local)      : 2016-10-08 17:51:19
    
Writing library                          : Apple QuickTime
    
Writing library                          : Apple QuickTime
    
Encoded_Library_Name                     : Apple QuickTime
    
com.apple.quicktime.make                 : Apple
    
com.apple.quicktime.model                : iPhone 5
    
com.apple.quicktime.software             : 10.0.2
    
com.apple.quicktime.creationdate         : 2016-10-08T17:51:19-0500
    

    
Video
    
Count                                    : 334
    
Count of stream of this kind             : 1
    
Kind of stream                           : Video
    
Kind of stream                           : Video
    
Stream identifier                        : 0
    
StreamOrder                              : 0
    
ID                                       : 1
    
ID                                       : 1
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format/Url                               : http://developers.videolan.org/x264.html
    
Commercial name                          : AVC
    
Format profile                           : High@L4.1
    
Format settings                          : CABAC / 1 Ref Frames
    
Format settings, CABAC                   : Yes
    
Format settings, CABAC                   : Yes
    
Format settings, ReFrames                : 1
    
Format settings, ReFrames                : 1 frame
    
Internet media type                      : video/H264
    
Codec ID                                 : avc1
    
Codec ID/Info                            : Advanced Video Coding
    
Codec ID/Url                             : http://www.apple.com/quicktime/download/standalone.html
    
Codec                                    : AVC
    
Codec                                    : AVC
    
Codec/Family                             : AVC
    
Codec/Info                               : Advanced Video Codec
    
Codec/Url                                : http://developers.videolan.org/x264.html
    
Codec/CC                                 : avc1
    
Codec profile                            : High@L4.1
    
Codec settings                           : CABAC / 1 Ref Frames
    
Codec settings, CABAC                    : Yes
    
Codec_Settings_RefFrames                 : 1
    
Duration                                 : 52268
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 00:00:52.268
    
Duration                                 : 00:00:52:09
    
Duration                                 : 00:00:52.268 (00:00:52:09)
    
Bit rate                                 : 17375530
    
Bit rate                                 : 17.4 Mb/s
    
Width                                    : 1920
    
Width                                    : 1 920 pixels
    
Height                                   : 1080
    
Height                                   : 1 080 pixels
    
Stored_Height                            : 1088
    
Sampled_Width                            : 1920
    
Sampled_Height                           : 1080
    
Pixel aspect ratio                       : 1.000
    
Display aspect ratio                     : 1.778
    
Display aspect ratio                     : 16:9
    
Rotation                                 : 90.000
    
Rotation                                 : 90°
    
Frame rate mode                          : VFR
    
Frame rate mode                          : Variable
    
Frame rate                               : 25.044
    
Frame rate                               : 25.044 FPS
    
Minimum frame rate                       : 23.077
    
Minimum frame rate                       : 23.077 FPS
    
Maximum frame rate                       : 30.000
    
Maximum frame rate                       : 30.000 FPS
    
Frame count                              : 1309
    
Resolution                               : 8
    
Resolution                               : 8 bits
    
Colorimetry                              : 4:2:0
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Scan type                                : Progressive
    
Interlacement                            : PPF
    
Interlacement                            : Progressive
    
Bits/(Pixel*Frame)                       : 0.335
    
Stream size                              : 113523046
    
Stream size                              : 108 MiB (100%)
    
Stream size                              : 108 MiB
    
Stream size                              : 108 MiB
    
Stream size                              : 108 MiB
    
Stream size                              : 108.3 MiB
    
Stream size                              : 108 MiB (100%)
    
Proportion of this stream                : 0.99590
    
Title                                    : Core Media Video
    
Encoded date                             : UTC 2016-10-08 22:51:19
    
Tagged date                              : UTC 2016-10-08 22:52:12
    
Color range                              : Limited
    
colour_description_present               : Yes
    
Color primaries                          : BT.709
    
Transfer characteristics                 : BT.709
    
Matrix coefficients                      : BT.709
    

    
Audio
    
Count                                    : 272
    
Count of stream of this kind             : 1
    
Kind of stream                           : Audio
    
Kind of stream                           : Audio
    
Stream identifier                        : 0
    
StreamOrder                              : 1
    
ID                                       : 2
    
ID                                       : 2
    
Format                                   : AAC
    
Format/Info                              : Advanced Audio Codec
    
Commercial name                          : AAC
    
Format profile                           : LC
    
Codec ID                                 : 40
    
Codec                                    : AAC LC
    
Codec                                    : AAC LC
    
Codec/Family                             : AAC
    
Codec/CC                                 : 40
    
Duration                                 : 52268
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 00:00:52.268
    
Duration                                 : 00:00:52:15
    
Duration                                 : 00:00:52.268 (00:00:52:15)
    
Source duration                          : 52338
    
Source duration                          : 52 s 338 ms
    
Source duration                          : 52 s 338 ms
    
Source duration                          : 52 s 338 ms
    
Source duration                          : 00:00:52.338
    
Bit rate mode                            : CBR
    
Bit rate mode                            : Constant
    
Bit rate                                 : 64000
    
Bit rate                                 : 64.0 kb/s
    
Channel(s)                               : 1
    
Channel(s)                               : 1 channel
    
Channel positions                        : Front: C
    
Channel positions                        : 1/0/0
    
ChannelLayout                            : C
    
Samples per frame                        : 1024
    
Sampling rate                            : 44100
    
Sampling rate                            : 44.1 kHz
    
Samples count                            : 2305019
    
Frame rate                               : 43.066
    
Frame rate                               : 43.066 FPS (1024 spf)
    
Frame count                              : 2251
    
Source frame count                       : 2254
    
Compression mode                         : Lossy
    
Compression mode                         : Lossy
    
Stream size                              : 410424
    
Stream size                              : 401 KiB (0%)
    
Stream size                              : 401 KiB
    
Stream size                              : 401 KiB
    
Stream size                              : 401 KiB
    
Stream size                              : 400.8 KiB
    
Stream size                              : 401 KiB (0%)
    
Proportion of this stream                : 0.00360
    
Source stream size                       : 410894
    
Source stream size                       : 401 KiB (0%)
    
Source stream size                       : 401 KiB
    
Source stream size                       : 401 KiB
    
Source stream size                       : 401 KiB
    
Source stream size                       : 401.3 KiB
    
Source stream size                       : 401 KiB (0%)
    
Source_StreamSize_Proportion             : 0.00360
    
Title                                    : Core Media Audio
    
Encoded date                             : UTC 2016-10-08 22:51:19
    
Tagged date                              : UTC 2016-10-08 22:52:12
    

    
Other #1
    
Count                                    : 112
    
Count of stream of this kind             : 2
    
Kind of stream                           : Other
    
Kind of stream                           : Other
    
Stream identifier                        : 0
    
Stream identifier                        : 1
    
Type                                     : meta
    
Duration                                 : 52268
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 00:00:52.268
    
Duration                                 : 00:00:52.268
    
Frame count                              : 6
    
Bit rate mode                            : VBR
    

    
Other #2
    
Count                                    : 112
    
Count of stream of this kind             : 2
    
Kind of stream                           : Other
    
Kind of stream                           : Other
    
Stream identifier                        : 1
    
Stream identifier                        : 2
    
Type                                     : meta
    
Duration                                 : 52268
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 52 s 268 ms
    
Duration                                 : 00:00:52.268
    
Duration                                 : 00:00:52.268
    
Frame count                              : 1
    
Bit rate mode                            : CBR

    and ffprobe IMG_1438.MOV outputs :

    ffprobe version 3.1.3 Copyright (c) 2007-2016 the FFmpeg developers
    
  built with Apple LLVM version 7.3.0 (clang-703.0.31)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.1.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --disable-lzma --enable-vda
    
  libavutil      55. 28.100 / 55. 28.100
    
  libavcodec     57. 48.101 / 57. 48.101
    
  libavformat    57. 41.100 / 57. 41.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 47.100 /  6. 47.100
    
  libavresample   3.  0.  0 /  3.  0.  0
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  1.100 /  2.  1.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'IMG_1438.MOV':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 0
    
    compatible_brands: qt  
    
    creation_time   : 2016-10-08 22:51:19
    
    com.apple.quicktime.make: Apple
    
    com.apple.quicktime.model: iPhone 5
    
    com.apple.quicktime.software: 10.0.2
    
    com.apple.quicktime.creationdate: 2016-10-08T17:51:19-0500
    
  Duration: 00:00:52.27, start: 0.000000, bitrate: 17446 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 17375 kb/s, 25.04 fps, 120 tbr, 600 tbn, 1200 tbc (default)
    
    Metadata:
    
      rotate          : 90
    
      creation_time   : 2016-10-08 22:51:19
    
      handler_name    : Core Media Data Handler
    
      encoder         : H.264
    
    Side data:
    
      displaymatrix: rotation of -90.00 degrees
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 62 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-08 22:51:19
    
      handler_name    : Core Media Data Handler
    
    Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-08 22:51:19
    
      handler_name    : Core Media Data Handler
    
    Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    
    Metadata:
    
      creation_time   : 2016-10-08 22:51:19
    
      handler_name    : Core Media Data Handler
    
Unsupported codec with id 0 for input stream 2
    
Unsupported codec with id 0 for input stream 3

    UPDATE
    To clarify : my video above, the one with the high framerate (120 FPS) output after scaling, plays perfectly before and after scaling with FFmpeg (no sync issues, and 120 FPS is only about 14% larger in file size), I am simply trying to understand why this increase in framerate happens (just a little beyond Mulvya’s note that the framerate stored in the container is wrong).

    From a programming perspective, the initial issue I ran into was that I was using frame= from FFmpeg’s sterr console output to determine progress, which reports erroneous results when the frame count increases dramatically on output ("I’m 372% done encoding ?!") ; I have since read another stackoverflow answer and changed my code to use time=, which appears to be a more robust way for me to display FFmpeg progress. (Also, there is FFmpeg’s -progress option, of course).

    Improving on the original command

    My new command to scale, preserve a useful framerate, and optimize threads :

    ffmpeg -i IMG_1438.MOV -vf scale=-2:600 -r 30 -vsync 0 IMG_1438_scaledTo600.MOV

    Where 30 is the "Maximum frame rate" from mediainfo.

    Thanks to help in the comments, I now know I do not fully understand FFmpeg’s use of three different time bases for timestamps : tbn, tbc, and tbr.
    They were explained by Robert Swain in 2009 and his explanation was also used to answer a Stackoverflow question about tbn, tbc, tbr.

    It sounds to me, as I’m pulling together comments from Mulvya below and Michael Rampe at another forum, that tbr is guessed ; it is frequently but not always the best value to use when changing from a variable to a constant frame rate video.

    Which leaves these 2 questions...

    (1) tbr is incorrect when "field rate and frame rate" differ ? Does this happen a lot ?
    (2) Is -r 30 where 30 is the maximum frame rate reported by mediainfo the best way to do it for most codec/container combinations ? (Or should I only use this method when I am scaling a H.264/MPEG-4 AVC video ?)

  • ffmpeg universal audio decoder failing on certain wma files

    6 septembre 2016, par Steve M

    I’m trying to build a small universal audio decoding library that decodes the file a frame at a time. I’ve built a command line static ffmpeg that I can exec that works on every file format I have tested. Now I am trying to build a shared library version, so I can directly decode frame by frame. I seem to have success, except it is failing on certain WMA files. FFprobe of a file that is failing (file plays on every music player, and command line ffmpeg with same build configuration shows no problems) :

    Input #0, asf, from 'a.wma':
    
  Metadata:
    
    WM/Track        : 0
    
    track           : 1
    
    WM/MediaPrimaryClassID: {D1607DBC-E323-4BE2-86A1-48A42A28441E}
    
    WM/EncodingTime : 2139839136
    
    WMFSDKVersion   : 11.0.5721.5145
    
    WMFSDKNeeded    : 0.0.0.0000
    
    AverageLevel    : 10107
    
    PeakValue       : 32673
    
    IsVBR           : 0
    
    DeviceConformanceTemplate: M0
    
    WM/WMADRCPeakReference: 32766
    
    WM/WMADRCPeakTarget: 32766
    
    WM/WMADRCAverageReference: 12733
    
    WM/WMADRCAverageTarget: 12733
    
  Duration: 00:00:29.94, start: 0.000000, bitrate: 50 kb/s
    
    Stream #0:0: Audio: wmapro (b[1][0][0] / 0x0162), 44100 Hz, stereo, fltp, 48 kb/s

    Here’s my code for initializing and opening file and the decode function :

    FFMpegAudioDecoder::FFMpegAudioDecoder(int samplerate) : len(0), index(0), samplerate(samplerate)
    
{
    
    av_register_all();
    
    avformat_network_init();
    
    pFormatCtx = avformat_alloc_context();
    
}
    
const char* FFMpegAudioDecoder::open(const char *path, bool metaOnly, int offset, int length)
    
{
    
    const char* error = "File could not be opened";
    
    //this->path = path;
    
    if(avformat_open_input(&pFormatCtx,path,NULL,NULL)!=0){
    
            return error;
    
    }
    
    if(avformat_find_stream_info(pFormatCtx,NULL)<0){
    
            return error;
    
    }
    
    // Dump valid information onto standard error
    
    //av_dump_format(pFormatCtx, 0, path, false);
    

    
    // Find the best audio stream
    
    audioStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_AUDIO, -1, -1, nullptr, 0);
    

    
    if(audioStream < 0){
    
        return error;
    
    }
    
    pCodecCtx=pFormatCtx->streams[audioStream]->codec;
    

    
    // Find the decoder for the audio stream
    
    pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
    
    if(pCodec==NULL){
    
        return error;
    
    }
    

    
    // Open codec
    
    if(avcodec_open2(pCodecCtx, pCodec,NULL)<0){
    
       return error;
    
    }
    
    packet=(AVPacket *)av_malloc(sizeof(AVPacket));
    
    av_init_packet(packet);
    

    
    //Out Audio Param
    
    out_channel_layout=AV_CH_LAYOUT_STEREO;
    
    //nb_samples: AAC-1024 MP3-1152
    
    out_nb_samples=pCodecCtx->frame_size;
    
    out_sample_fmt=AV_SAMPLE_FMT_S16;
    
    out_sample_rate=samplerate;
    
    out_channels=av_get_channel_layout_nb_channels(out_channel_layout);
    
    //Out Buffer Size
    
    out_buffer_size=av_samples_get_buffer_size(NULL,out_channels ,out_nb_samples,out_sample_fmt, 1);
    

    
    out_buffer=(uint8_t *)av_malloc(MAX_AUDIO_FRAME_SIZE*3);
    
    pFrame=av_frame_alloc();
    

    
    //FIX:Some Codec's Context Information is missing
    
    in_sample_fmt = pCodecCtx->sample_fmt;
    
    in_channel_layout=av_get_default_channel_layout(pCodecCtx->channels);
    
    //Swr
    
    initConverter();
    

    
    timeBase = (int64_t(pCodecCtx->time_base.num) * AV_TIME_BASE) / int64_t(pCodecCtx->time_base.den);
    

    
    LOGI("Opened file");
    
    return nullptr;
    
}
    
void FFMpegAudioDecoder::initConverter()
    
{
    
     au_convert_ctx = swr_alloc();
    
     au_convert_ctx=swr_alloc_set_opts(au_convert_ctx,out_channel_layout, out_sample_fmt, out_sample_rate,
    
            in_channel_layout,in_sample_fmt, pCodecCtx->sample_rate,0, NULL);
    
     swr_init(au_convert_ctx);
    
}
    
unsigned char FFMpegAudioDecoder::decode(short int *pcmOutput, unsigned int *samples)
    
{
    
    unsigned int samplesWritten = 0;
    
    //LOGI("BEFORE FRAME");
    
    int read = av_read_frame(pFormatCtx, packet);
    
    //LOGI("AFTER FRAME");
    
    if (read < 0)
    
    {
    
        char msg[101];
    
        av_strerror(read, msg, 100);
    
        LOGI("EOF, %s", msg);
    
        return AUDIODECODER_EOF;
    
    }
    

    
    if(packet->stream_index==audioStream)
    
    {
    
        //LOGI("BEFORE DECODE");
    
        ret = avcodec_decode_audio4( pCodecCtx, pFrame, &got_picture, packet);
    
        const char* msg1 = av_get_sample_fmt_name((AVSampleFormat)pFrame->format);
    
        const char* msg2 = av_get_sample_fmt_name(in_sample_fmt);
    
        LOGI("samples formats, pFrame->format: %s, in_sample_fmt: %s", msg1, msg2);
    
        if (pFrame->format != in_sample_fmt)
    
        {
    
            LOGI("FORMAT CHANGED!@!!!!!, decode return value: %d", ret);
    
            in_sample_fmt = (AVSampleFormat) pFrame->format;
    
            swr_free(&au_convert_ctx);
    
            initConverter();
    
        }
    
        LOGI("Decode return value: %d, packet->size: %d", ret, packet->size);
    
        //LOGI("AFTER DECODE");
    

    
        if ( ret < 0 ) {
    
            char msg[101];
    
            av_strerror(ret, msg, 100);
    
            LOGI("decoder return value error, %s", msg);
    
            //return AUDIODECODER_ERROR;
    
        }
    
        else if ( got_picture > 0 ){
    
            //LOGI("BEFORE CONVERT");
    
            int converted = swr_convert(au_convert_ctx,&out_buffer, MAX_AUDIO_FRAME_SIZE,(const uint8_t **)&pFrame->data , pFrame->nb_samples);
    
           // LOGI("AFTER CONVERT");
    
            if ( converted < 0 ) {
    
                LOGI("CONVERT ERROR");
    
                return AUDIODECODER_ERROR;
    
            }
    
            for (int i = 0; i < converted * 4; i += 2)
    
            {
    
                pcmOutput[i / 2] = (short int)(out_buffer[i+1]<<8 | (out_buffer[i] & 0xFF));
    
            }
    
            samplesWritten = (unsigned int) converted;
    
            //LOGI("after write");
    
            //LOGI("index:%5d\t pts:%lld\t packet size:%d\t samples written:%d",index,packet->pts,packet->size,samplesWritten);
    
            index++;
    

    
        }
    
    }
    

    
    av_packet_unref(packet);
    
    //LOGI("after free, writte:%u", samplesWritten);
    
    *samples = samplesWritten;
    
    return AUDIODECODER_OK;
    
}

    The file reaches EOF after only 1-2 seconds and there is no audio. On a sample run with the WMA file the packet->format is set to null and there are strange return values from the decode4 function, here is the log with some redundancy cut :

    09-05 16:21:51.839 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: fltp
    
09-05 16:21:51.839 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: FORMAT CHANGED!@!!!!!, decode return value: 2
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 2, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 682, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 206, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 194, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 26, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 100, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.880 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 68, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 2230, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 49, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 65, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 216, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 123, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 146, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.881 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 24, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 162, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 90, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 15, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 290, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 220, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 118, packet->size: 2230
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.882 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 135, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 171, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 267, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 56, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: 90, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: Decode return value: -1094995529, packet->size: 2230
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: decoder return value error, Invalid data found when processing input
    
09-05 16:21:51.883 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: samples formats, pFrame->format: (null), in_sample_fmt: (null)
    
09-05 16:21:51.885 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: EOF, End of file
    
09-05 16:21:51.885 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: DECODELOOP EOF 2
    
09-05 16:21:51.886 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: EOF, End of file
    
09-05 16:21:51.887 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: DECODELOOP EOF 2
    
09-05 16:21:51.888 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: EOF, End of file
    
09-05 16:21:51.888 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: DECODELOOP EOF 2
    
09-05 16:21:51.916 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: EOF, End of file
    
09-05 16:21:51.916 5116-5332/com.smp.musicspeed I/SOUNDPROCESS: DECODELOOP EOF 2

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