J.Y. Works 的部落格

It's a weird fail, if your adb logcat does not get the "http 404 error",  following referable solution you can make a try.

Test failed to run to completion. Reason: 'Failed to receive adb shell test output within 600000 ms. Test may have timed out, or adb connection to device became unresponsive'. Check device logcat for details.

CTS command :

cts-tf > run cts -c android.media.cts.StreamingMediaPlayerTest -m testHLS

Solution : in your product's device.mk

# limit the HLS bandwidth
PRODUCT_PROPERTY_OVERRIDES += \
    media.httplive.max-bw=360000

Trace Code : http live streaming

~/Android_5.1$ find frameworks/av/media/libstagefright/httplive/ -name LiveSession.cpp
frameworks/av/media/libstagefright/httplive/LiveSession.cpp

#if 1
    char value[PROPERTY_VALUE_MAX];
    ssize_t index = -1;
    if (property_get("media.httplive.bw-index", value, NULL)) {
        char *end;
        index = strtol(value, &end, 10);
        CHECK(end > value && *end == '\0');

        if (index >= 0 && (size_t)index >= mBandwidthItems.size()) {
            index = mBandwidthItems.size() - 1;
        }
    }

    if (index < 0) {
        int32_t bandwidthBps;
        if (mHTTPDataSource != NULL
                && mHTTPDataSource->estimateBandwidth(&bandwidthBps)) {
            ALOGV("bandwidth estimated at %.2f kbps", bandwidthBps / 1024.0f);
        } else {
            ALOGV("no bandwidth estimate.");
            return 0;  // Pick the lowest bandwidth stream by default.
        }

        char value[PROPERTY_VALUE_MAX];
        if (property_get("media.httplive.max-bw", value, NULL)) {
            char *end;
            long maxBw = strtoul(value, &end, 10);
            if (end > value && *end == '\0') {
                if (maxBw > 0 && bandwidthBps > maxBw) {
                    ALOGV("bandwidth capped to %ld bps", maxBw);
                    bandwidthBps = maxBw;
                }
            }
        }

        // Pick the highest bandwidth stream below or equal to estimated bandwidth.

        index = mBandwidthItems.size() - 1;
        while (index > 0) {
            // consider only 80% of the available bandwidth, but if we are switching up,
            // be even more conservative (70%) to avoid overestimating and immediately
            // switching back.
            size_t adjustedBandwidthBps = bandwidthBps;
            if (index > mCurBandwidthIndex) {
                adjustedBandwidthBps = adjustedBandwidthBps * 7 / 10;
            } else {
                adjustedBandwidthBps = adjustedBandwidthBps * 8 / 10;
            }
            if (mBandwidthItems.itemAt(index).mBandwidth <= adjustedBandwidthBps) {
                break;
            }
            --index;
        }
    }
#elif 0