FFmpge crash when use VideoToolBox to encode frames

[yxibng]

Summary of the bug:
How to reproduce:

static void vtenc_output_callback(
    void *ctx,
    void *sourceFrameCtx,
    OSStatus status,
    VTEncodeInfoFlags flags,
    CMSampleBufferRef sample_buffer)
{
    AVCodecContext *avctx = ctx;
    VTEncContext   *vtctx = avctx->priv_data;
    ExtraSEI *sei = sourceFrameCtx;

    if (vtctx->async_error) {
        if(sample_buffer) CFRelease(sample_buffer); //This line cause crash, should remove
        return;
    }

    if (status) {
        av_log(avctx, AV_LOG_ERROR, "Error encoding frame: %d\n", (int)status);
        set_async_error(vtctx, AVERROR_EXTERNAL);
        return;
    }

    if (!sample_buffer) {
        return;
    }

    if (!avctx->extradata && (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
        int set_status = set_extradata(avctx, sample_buffer);
        if (set_status) {
            set_async_error(vtctx, set_status);
            return;
        }
    }

    vtenc_q_push(vtctx, sample_buffer, sei);
}

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[_08]

Fixed in adcdf0bc6057a99989a28bb3d1ba65e8b66eff3d.