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Sur d’autres sites (3129)

  • FFMPEG x264 encoding on Android - error with lookahead

    6 janvier 2013, par Tishu

    I am using FFMPEG + x264 on Android to encode YUV420 frames to a video file. I use the following code on each frame to encode them :

    avcodec_encode_video2(gVideoWriteCodecCtx, &packet, pCurrentFrame, &gotPacket);

    On the first few calls, the frame buffer gets filled and nothing is encoded. When the first encoding happens, a call is made to x264_lookahead_get_frames. I can see there that my frame array is correctly populated, but the first item is NULL. As a consequence, in x264_weights_analyse the reference frame gotten as frames[p0] is NULL and I get an exception there.

    slicetype.c, the first frame in "frames" is NULL

    if( h->param.analyse.i_weighted_pred && b == p1 )
    
    {
    
        x264_emms();
    
        x264_weights_analyse( h, fenc, frames[p0], 1 );
    
        w = fenc->weight[0];
    
    }

    And the exception happens there, ref is NULL

    static void x264_weights_analyse( x264_t *h, x264_frame_t *fenc, x264_frame_t *ref, int b_lookahead )
    
    {
    
        int i_delta_index = fenc->i_frame - ref->i_frame - 1;

    I surely am missing something as I am sure this encoder works for most people :) Does anyone have an idea why this first frame in the "frames" array is null ?

    Many thanks

  • FFMPEG x264 encoding on Android - error with lookahead

    6 janvier 2013, par Tishu

    I am using FFMPEG + x264 on Android to encode YUV420 frames to a video file. I use the following code on each frame to encode them :

    avcodec_encode_video2(gVideoWriteCodecCtx, &packet, pCurrentFrame, &gotPacket);

    On the first few calls, the frame buffer gets filled and nothing is encoded. When the first encoding happens, a call is made to x264_lookahead_get_frames. I can see there that my frame array is correctly populated, but the first item is NULL. As a consequence, in x264_weights_analyse the reference frame gotten as frames[p0] is NULL and I get an exception there.

    slicetype.c, the first frame in "frames" is NULL

    if( h->param.analyse.i_weighted_pred && b == p1 )
    
    {
    
        x264_emms();
    
        x264_weights_analyse( h, fenc, frames[p0], 1 );
    
        w = fenc->weight[0];
    
    }

    And the exception happens there, ref is NULL

    static void x264_weights_analyse( x264_t *h, x264_frame_t *fenc, x264_frame_t *ref, int b_lookahead )
    
    {
    
        int i_delta_index = fenc->i_frame - ref->i_frame - 1;

    I surely am missing something as I am sure this encoder works for most people :) Does anyone have an idea why this first frame in the "frames" array is null ?

    Many thanks

  • How to add more codec support in FFmpeg library used with Android ?

    2 janvier 2013, par AB1209

    I want to use ffmpeg library in my Android app to play .ts video file format.I am trying to run sample app given at GitHub Appunite.

    So far I have managed to compile ffmpeg library & build .so files.I am working on Ubuntu 10.10 & using NDK r8.

    Sample app works fine & plays file formats like .mp4 & .3gp but it doesn't play .FLV & .ts file (which is my requirement).

    Whenever I try to play .ts or .FLV files it says "Could not open stream"

    In Logcat it shows

    E/player.c(28005): player_set_data_source Could not open video file: file:///mnt/sdcard/football.ts (-1094995529: Invalid data found when processing input)

    I am trying this for weeks.So far I have not got any way. Please help

    Thanks

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