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Postsdbo
PO
 

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    <p>In your program, there is a design issue. In the loop <code>while (!sawOutputEOS) {</code> where you are trying to re-encode,</p> <pre><code>int inputBufIndex = encoder.dequeueInputBuffer(kTimeOutUs); </code></pre> <p>Dequeues one buffer from the input / input port of the encoder</p> <pre><code> ByteBuffer dstBuf = encoderInputBuffers[inputBufIndex]; </code></pre> <p>Buffer pointer to the dequeued buffer</p> <pre><code>int sampleSize = extractor.readSampleData(dstBuf, 0 /* offset */); </code></pre> <p>The dequeued buffer is filled with the data from extractor. The output of an extractor is a compressed bitstream. This is <strong>not a YUV</strong> uncompressed frame.</p> <pre><code>encoder.queueInputBuffer(inputBufIndex,....) </code></pre> <p>Here, the compressed bitstream is encoded. Since this is not a YUV frame, the encoder will try to perform a compression to the best of it's ability and hence, you observe a green illegible frame at the output of the encoder. I presume you are observing this on the screen due to the following portion of code where you decode the same content. This would have been observed even if the encoder's output was written into a file and played through a different player or on PC.</p> <p>From the program, I presume your intended design is <code>Decode ==&gt; Encode ==&gt; Live Decode</code> for which your graph should be</p> <pre><code>MediaExtractor ==&gt; MediaCodec (Decoder) ==&gt; MediaCodec (Encoder) ==&gt; MediaCodec (Decoder) ==&gt; Display </code></pre> <p>P.S: Did you observe any memory violations when you run this program? </p>
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    1. PORe-encoding h.264 content with a different bit rate using Android MediaCodec
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    1. USGanesh
    1. USGanesh
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    1. COThanks for the detailed reply. I'm going to experiment with decoding and then encoding the content and will report back.
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      1. USlucasweb
    2. COcan you pls report back?
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      1. USshem
    3. COThe central portion of the CTS DecodeEditEncodeTest, added in Android 4.3 (API 18), may be of use. Instead of decoding YUV data to ByteBuffer it moves the data through a Surface. Info and link to code here: http://bigflake.com/mediacodec/#DecodeEditEncodeTest
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      1. USfadden
 

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