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  • how to play mp3 using ffmpeg

    5 novembre 2013, par Ari

    I'm trying to play audio mp3 file using ffmpeg in android but I'm facing a problem in the below mentioned code

    how to play mp3 using ffmpeg

     void JNICALL  Java_com_music_MainActivity_loadFile(JNIEnv* env, jobject obj,jstring file,jbyteArray array)
{
    jboolean            isfilenameCopy;
    const char *        filename = (*env)->GetStringUTFChars(env, file, &isfilenameCopy);
    AVCodec *codec;
    AVCodecContext *c= NULL;
    int out_size, len;
    FILE *f, *outfile;
    uint8_t *outbuf;
    uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
    AVPacket avpkt;
    jclass              cls = (*env)->GetObjectClass(env, obj);
    jmethodID           play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V");//At the begining of your main function

    av_init_packet(&avpkt);

    printf("Audio decoding\n");


    __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "inside load file");
    /* find the mpeg audio decoder */
    codec = avcodec_find_decoder(CODEC_ID_MP3);
    if (!codec) {
        fprintf(stderr, "codec not found\n");
        exit(1);
    }

    c= avcodec_alloc_context();

    /* open it */
    if (avcodec_open(c, codec) < 0) {
        fprintf(stderr, "could not open codec\n");
        exit(1);
    }

    __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open avcode");
    outbuf = malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
   __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "open %s",outbuf);

    f = fopen(filename, "rb");
    if (!f) {
        fprintf(stderr, "could not open %s\n", filename);
        exit(1);
    }

    /* decode until eof */
    avpkt.data = inbuf;
    avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
    __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "data =%s and size %d",avpkt.data,avpkt.size);
    while (avpkt.size > 0) {
        out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
        len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);
        __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, "length =%d",len);
        if (len < 0) {
            fprintf(stderr, "Error while decoding\n");
            __android_log_print(ANDROID_LOG_INFO, DEBUG_TAG, " failed length =%d",errno);

            exit(1);
        }
        if (out_size > 0) {
            /* if a frame has been decoded, output it */
            jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
            memcpy(bytes, outbuf, out_size); //
            (*env)->ReleaseByteArrayElements(env, array, bytes, 0);
            (*env)->CallVoidMethod(env, obj, play, array, out_size);

        }
        avpkt.size -= len;
        avpkt.data += len;
        if (avpkt.size < AUDIO_REFILL_THRESH) {
            /* Refill the input buffer, to avoid trying to decode
             * incomplete frames. Instead of this, one could also use
             * a parser, or use a proper container format through
             * libavformat. */
            memmove(inbuf, avpkt.data, avpkt.size);
            avpkt.data = inbuf;
            len = fread(avpkt.data + avpkt.size, 1,
                        AUDIO_INBUF_SIZE - avpkt.size, f);
            if (len > 0)
                avpkt.size += len;
        }
    }

    fclose(f);
    free(outbuf);

    avcodec_close(c);
    av_free(c);
}

    i am getting the len = - 1 in 

    len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);

    what am i doing wrong??

    please help

  • compile FFmpeg error on windows when run ./configure

    5 novembre 2013, par user1325717

    I want to use FFmpeg to decode mp3 and acc on android, I use android-ndk-r7 and the newest cygwin.

    I wrote a shell config.sh, which content is:

    TMPDIR=/cygdrive/c/temp

PREBUILT=/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows
PLATFORM=/cygdrive/c/android-ndk-r7/platforms/android-8/arch-arm

./configure --target-os=linux --arch=arm --enable-version3 --enable-gpl --enable-nonfree --disable-stripping --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-ffprobe --disable-encoders --disable-muxers --disable-devices --disable-protocols --enable-protocol=file --enable-avfilter --disable-network --disable-mpegaudio-hp --disable-avdevice --enable-cross-compile --cc=$PREBUILT/bin/arm-linux-androideabi-gcc --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- --nm=$PREBUILT/bin/arm-linux-androideabi-nm --extra-cflags="-fPIC -DANDROID" --disable-asm --enable-neon --enable-armv5te --extra-ldflags="-Wl,-T,$PREBUILT/arm-eabi/lib/ldscripts/armelf_linux_eabi.x -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtbegin.o $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/crtend.o -lc -lm -ldl"

    I open cmd and do bash to open cygwin shell, then do ./config, the problem is appeared: "/cygdrive/c/android-ndk-r7/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/arm-linux-androideabi-gcc is unable to create an executable file..."

    the config.log is:

    check_ld
check_cc
BEGIN /cygdrive/c/temp/ffconf.SFJc3t92.c
    1   int main(void){ return 0; }
END /cygdrive/c/temp/ffconf.SFJc3t92.c
gcc -fPIC -DANDROID -std=c99 -c -o /cygdrive/c/temp/ffconf.YKRv5TSp.o /cygdrive/c/temp/ffconf.SFJc3t92.c
/cygdrive/c/temp/ffconf.SFJc3t92.c:1:0: warning: -fPIC ignored for target (all code is position independent)
gcc -Wl,-rpath-link=/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -L/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib -nostdlib /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtend_android.o -lc -lm -ldl -o /cygdrive/c/temp/ffconf.Yf1Ftjmo /cygdrive/c/temp/ffconf.YKRv5TSp.o
/usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../i686-pc-cygwin/bin/ld: /cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: Relocations in generic ELF (EM: 40)
/cygdrive/c/android-ndk-r7/platforms/android-4/arch-arm/usr/lib/crtbegin_static.o: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
C compiler test failed.

    I don't know what is happened, is there someone who know what is happened, thanks.

  • ffmpeg fastest way to convert videos avi to mp4 [migrated]

    5 novembre 2013, par user2938660

    I have server which has:

    • 8x3,4 (sandy bridge cpu)
    • 10gb ram

    i tried different combinations to convert vvideos i mean avi to mp4 but it takes so long: - ~20mins=~200mb

    maybe there is some ffmpeg command which does this much faster?

    EDIT WITH ULTRAFAST:

    root@1tb:~/test# ffmpeg -i video.avi -c:v libx264 -preset ultrafast out.mp4
ffmpeg version git-2013-10-28-f1f0b01 Copyright (c) 2000-2013 the FFmpeg developers
  built on Oct 29 2013 02:05:45 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grab
  libavutil      52. 48.100 / 52. 48.100
  libavcodec     55. 39.100 / 55. 39.100
  libavformat    55. 19.104 / 55. 19.104
  libavdevice    55.  5.100 / 55.  5.100
  libavfilter     3. 90.100 /  3. 90.100
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
Input #0, avi, from 'video.avi':
  Duration: 00:29:00.28, start: 0.000000, bitrate: 1120 kb/s
    Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 23.98 tbr, 23.98 tbn, 23.98 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16p, 128 kb/s
    Metadata:
      title           : Hello.Ladies.S01E06.HDTV.XviD-AFG_360p.audio
[libx264 @ 0x2e08e40] using SAR=1/1
[libx264 @ 0x2e08e40] using cpu capabilities: none!
[libx264 @ 0x2e08e40] profile Constrained Baseline, level 3.0
[libx264 @ 0x2e08e40] 264 - core 138 r2358 9e941d1 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=23 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf55.19.104
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 10000k tbn, 23.98 tbc
    Stream #0:1: Audio: aac (libfaac) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      title           : Hello.Ladies.S01E06.HDTV.XviD-AFG_360p.audio
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg4 -> libx264)
  Stream #0:1 -> #0:1 (mp3 -> libfaac)
Press [q] to stop, [?] for help
frame=41726 fps=326 q=-1.0 Lsize=  312916kB time=00:29:00.32 bitrate=1473.0kbits/s dup=1 drop=0
video:284876kB audio:27186kB subtitle:0 global headers:0kB muxing overhead 0.273494%
[libx264 @ 0x2e08e40] frame I:167   Avg QP:18.69  size: 30492
[libx264 @ 0x2e08e40] frame P:41559 Avg QP:21.68  size:  6897
[libx264 @ 0x2e08e40] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x2e08e40] mb P  I16..4:  6.3%  0.0%  0.0%  P16..4: 51.2%  0.0%  0.0%  0.0%  0.0%    skip:42.5%
[libx264 @ 0x2e08e40] coded y,uvDC,uvAC intra: 44.9% 54.5% 19.0% inter: 28.1% 20.3% 2.2%
[libx264 @ 0x2e08e40] i16 v,h,dc,p: 43% 23% 21% 13%
[libx264 @ 0x2e08e40] i8c dc,h,v,p: 36% 22% 32% 11%
[libx264 @ 0x2e08e40] kb/s:1340.96
root@1tb:~/test# qt-faststart out.mp4 labas1.mp4
ftyp          0 32
free         32 8
mdat         40 319552104
moov  319552144 873943
 patching stco atom...
 patching stco atom...
 writing ftyp atom...
 writing moov atom...
 copying rest of file...
root@1tb:~/test#

  • FFmpeg detecting the first frame after a commercial

    5 novembre 2013, par William Joe Baldwin

    I've been searching for a way to detect the very first frame after a commercial in FFmpeg. My recorder records TV shows, approximately 1 second before the sequence. Therefore the video file starts with few frames of the commercial.

    By checking the page below, it seems there is a way to detect scene changes:

    Extract Thumbnails of Every Camera Change on a Video File

    Does anyone know a way to rewrite the code from the link to get the first scene change as frame count?

    Thanks!

  • x264 parameters configuration

    5 novembre 2013, par user1558688

    I need to configure x264 to reproduce the below parameters.

    The configuration was extracted using Elecard Stream Analyzer from the first keyframe received from a legacy SIP phone h264 encoder. It is mission critical to reproduce it in software to keep compatibility with other sip clients.

    All the information I have are the parameters below.

    Is it possible at least to get close to the original ?

    Thanks a lot.

    0x00000000 H264 Sequence Parameter Set  
    profile_idc = 66 (PROFILE_IDC_Baseline)  
    constraint_set0_flag = 1  
    constraint_set1_flag = 0  
    constraint_set2_flag = 0  
    constraint_set3_flag = 0  
    constraint_set4_flag = 0  
    constraint_set5_flag = 0  
    reserved_zero_2bits = 0  
    level_idc = 12  
    seq_parameter_set_id = 4  
    log2_max_frame_num_minus4 = 4  
    pic_order_cnt_type = 2  
    num_ref_frames = 1  
    gaps_in_frame_num_value_allowed_flag = 0  
    pic_width_in_mbs_minus1 = 19 (320)  
    pic_height_in_map_units_minus1 = 14 (240)  
    frame_mbs_only_flag = 1  
    direct_8x8_inference_flag = 1  
    frame_cropping_flag = 0  
    vui_parameters_present_flag = 0  

0x0000000C H264 Picture Parameter Set  
    pic_parameter_set_id = 4  
    seq_parameter_set_id = 4  
    entropy_coding_mode_flag = 0  
    pic_order_present_flag = 0  
    num_slice_groups_minus1 = 0  
    num_ref_idx_L0_active_minus1 = 0  
    num_ref_idx_L1_active_minus1 = 0  
    weighted_pred_flag = 0  
    weighted_bipred_idc = 0  
    pic_init_qp_minus26 = 2  
    pic_init_qs_minus26 = 0  
    chroma_qp_index_offset = 0  
    deblocking_filter_control_present_flag = 1  
    constrained_intra_pred_flag = 0  
    redundant_pic_cnt_present_flag = 0  

0x00000014 H264 I slice #1 { frame_num = 0 }  
    first_mb_in_slice = 0  
    slice_type = 2  
    pic_parameter_set_id = 4  
    frame_num = 0  
    idr_pic_id = 4  
    dec_ref_pic_marking():  
    if(IdrPicFlag)  
        no_output_of_prior_pics_flag = 0  
        long_term_reference_flag = 0  
slice_qp_delta = 0  
disable_deblocking_filter_idc = 0  
    slice_alpha_c0_offset_div2 = 0  
    slice_beta_offset_div2 = 0  

0x00000591 H264 I slice #1 { frame_num = 0 }  
    first_mb_in_slice = 126  
    slice_type = 2  
    pic_parameter_set_id = 4  
    frame_num = 0  
    idr_pic_id = 4  
    dec_ref_pic_marking():  
        if(IdrPicFlag)  
            no_output_of_prior_pics_flag = 0  
            long_term_reference_flag = 0  
    slice_qp_delta = 0  
    disable_deblocking_filter_idc = 0  
    slice_alpha_c0_offset_div2 = 0  
    slice_beta_offset_div2 = 0  

0x00000B34 H264 I slice #1 { frame_num = 0 }  
    first_mb_in_slice = 201  
    slice_type = 2  
    pic_parameter_set_id = 4  
    frame_num = 0  
    idr_pic_id = 4  
    dec_ref_pic_marking():  
        if(IdrPicFlag)  
            no_output_of_prior_pics_flag = 0  
            long_term_reference_flag = 0  
    slice_qp_delta = 0  
    disable_deblocking_filter_idc = 0  
    slice_alpha_c0_offset_div2 = 0  
    slice_beta_offset_div2 = 0

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