| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>media-source-append-tiny-durations</title> |
| <script src="mock-media-source.js"></script> |
| <script src="../video-test.js"></script> |
| <script> |
| var source; |
| var sourceBuffer; |
| var initSegment; |
| |
| if (window.internals) |
| internals.initializeMockMediaSource(); |
| |
| function makeSamples(generation) { |
| return concatenateSamples([ |
| // pts, dts, dur, scale |
| makeASample( 0, 0, 1, 10000, 1, SAMPLE_FLAG.SYNC, generation), |
| makeASample(2000, 1, 999, 10000, 1, SAMPLE_FLAG.NONE, generation), |
| makeASample(1000, 1000, 1, 10000, 1, SAMPLE_FLAG.NONE, generation), |
| makeASample(4000, 1001, 999, 10000, 1, SAMPLE_FLAG.NONE, generation), |
| makeASample(3000, 2000, 1000, 10000, 1, SAMPLE_FLAG.NONE, generation), |
| ]); |
| } |
| |
| window.addEventListener('load', async event => { |
| |
| findMediaElement(); |
| |
| source = new MediaSource(); |
| run('video.src = URL.createObjectURL(source)'); |
| await waitFor(source, 'sourceopen'); |
| |
| run('sourceBuffer = source.addSourceBuffer("video/mock; codecs=mock")'); |
| initSegment = makeAInit(4, [makeATrack(1, 'mock', TRACK_KIND.VIDEO)]); |
| run('sourceBuffer.appendBuffer(initSegment)'); |
| |
| await waitFor(sourceBuffer, 'updateend'); |
| |
| run('sourceBuffer.appendBuffer(makeSamples(1))'); |
| await waitFor(sourceBuffer, 'updateend'); |
| bufferedSamples = await internals.bufferedSamplesForTrackId(sourceBuffer, 1); |
| testExpected("bufferedSamples.length", 5); |
| bufferedSamples.forEach(consoleWrite); |
| |
| consoleWrite("Testing the behavior is consistent when re-appending.") |
| run('sourceBuffer.appendBuffer(makeSamples(2))'); |
| await waitFor(sourceBuffer, 'updateend'); |
| bufferedSamples = await internals.bufferedSamplesForTrackId(sourceBuffer, 1); |
| testExpected("bufferedSamples.length", 5); |
| bufferedSamples.forEach(consoleWrite); |
| |
| endTest(); |
| |
| }, {once: true}); |
| </script> |
| </head> |
| <body> |
| <div>This tests that an append of non-overlapping samples of varying durations, some of them under a millisecond, don't trigger accidental erasure. |
| <br>This is done in some MP4 files, where decode durations are manipulated to code media containing B-frames while maintaining a start PTS = 0.</div> |
| <video></video> |
| </body> |
| </html> |
