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probe_test.go
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probe_test.go
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package mp4
import (
"os"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestProbe(t *testing.T) {
f, err := os.Open("./testdata/sample.mp4")
require.NoError(t, err)
defer f.Close()
info, err := Probe(f)
require.NoError(t, err)
assert.Equal(t, BrandISOM(), info.MajorBrand)
assert.Equal(t, uint32(0x200), info.MinorVersion)
require.Len(t, info.CompatibleBrands, 4)
assert.Equal(t, BrandISOM(), info.CompatibleBrands[0])
assert.Equal(t, BrandISO2(), info.CompatibleBrands[1])
assert.Equal(t, BrandAVC1(), info.CompatibleBrands[2])
assert.Equal(t, BrandMP41(), info.CompatibleBrands[3])
assert.False(t, info.FastStart)
assert.Equal(t, uint32(1000), info.Timescale)
assert.Equal(t, uint64(1024), info.Duration)
require.Len(t, info.Tracks, 2)
assert.Equal(t, uint32(1), info.Tracks[0].TrackID)
assert.Equal(t, uint32(10240), info.Tracks[0].Timescale)
assert.Equal(t, uint64(10240), info.Tracks[0].Duration)
assert.Equal(t, CodecAVC1, info.Tracks[0].Codec)
assert.Equal(t, uint8(1), info.Tracks[0].AVC.ConfigurationVersion)
assert.Equal(t, uint8(0x64), info.Tracks[0].AVC.Profile)
assert.Equal(t, uint8(0), info.Tracks[0].AVC.ProfileCompatibility)
assert.Equal(t, uint8(0xc), info.Tracks[0].AVC.Level)
assert.Equal(t, uint16(0x04), info.Tracks[0].AVC.LengthSize)
assert.Equal(t, uint16(320), info.Tracks[0].AVC.Width)
assert.Equal(t, uint16(180), info.Tracks[0].AVC.Height)
assert.False(t, info.Tracks[0].Encrypted)
require.Len(t, info.Tracks[0].EditList, 1)
assert.Equal(t, int64(2048), info.Tracks[0].EditList[0].MediaTime)
assert.Equal(t, uint64(1000), info.Tracks[0].EditList[0].SegmentDuration)
require.Len(t, info.Tracks[0].Samples, 10)
assert.Equal(t, uint32(3679), info.Tracks[0].Samples[0].Size)
assert.Equal(t, uint32(15), info.Tracks[0].Samples[9].Size)
assert.Equal(t, uint32(1024), info.Tracks[0].Samples[0].TimeDelta)
assert.Equal(t, uint32(1024), info.Tracks[0].Samples[9].TimeDelta)
assert.Equal(t, int64(2048), info.Tracks[0].Samples[0].CompositionTimeOffset)
assert.Equal(t, int64(1024), info.Tracks[0].Samples[9].CompositionTimeOffset)
require.Len(t, info.Tracks[0].Chunks, 9)
assert.Equal(t, uint64(48), info.Tracks[0].Chunks[0].DataOffset)
assert.Equal(t, uint64(6038), info.Tracks[0].Chunks[8].DataOffset)
assert.Equal(t, uint32(2), info.Tracks[0].Chunks[0].SamplesPerChunk)
assert.Equal(t, uint32(1), info.Tracks[0].Chunks[8].SamplesPerChunk)
assert.Equal(t, uint32(2), info.Tracks[1].TrackID)
assert.Equal(t, uint32(44100), info.Tracks[1].Timescale)
assert.Equal(t, uint64(45124), info.Tracks[1].Duration)
assert.Equal(t, CodecMP4A, info.Tracks[1].Codec)
assert.Equal(t, uint8(0x40), info.Tracks[1].MP4A.OTI)
assert.Equal(t, uint8(2), info.Tracks[1].MP4A.AudOTI)
assert.Equal(t, uint16(2), info.Tracks[1].MP4A.ChannelCount)
assert.False(t, info.Tracks[1].Encrypted)
require.Len(t, info.Segments, 0)
idxs, err := FindIDRFrames(f, info.Tracks[0])
require.NoError(t, err)
require.Len(t, idxs, 1)
assert.Equal(t, 0, idxs[0])
}
func TestProbeEncryptedVideo(t *testing.T) {
f, err := os.Open("./testdata/sample_init.encv.mp4")
require.NoError(t, err)
defer f.Close()
info, err := Probe(f)
require.NoError(t, err)
require.Len(t, info.Tracks, 2)
assert.Equal(t, uint32(1), info.Tracks[0].TrackID)
assert.Equal(t, CodecAVC1, info.Tracks[0].Codec)
assert.True(t, info.Tracks[0].Encrypted)
assert.Equal(t, uint32(2), info.Tracks[1].TrackID)
assert.Equal(t, CodecMP4A, info.Tracks[1].Codec)
assert.False(t, info.Tracks[1].Encrypted)
}
func TestProbeEncryptedAudio(t *testing.T) {
f, err := os.Open("./testdata/sample_init.enca.mp4")
require.NoError(t, err)
defer f.Close()
info, err := Probe(f)
require.NoError(t, err)
assert.Equal(t, uint32(1), info.Tracks[0].TrackID)
assert.Equal(t, CodecAVC1, info.Tracks[0].Codec)
assert.False(t, info.Tracks[0].Encrypted)
assert.Equal(t, uint32(2), info.Tracks[1].TrackID)
assert.Equal(t, CodecMP4A, info.Tracks[1].Codec)
assert.True(t, info.Tracks[1].Encrypted)
}
func TestProbeWithFMP4(t *testing.T) {
f, err := os.Open("./testdata/sample_fragmented.mp4")
require.NoError(t, err)
defer f.Close()
info, err := Probe(f)
require.NoError(t, err)
require.Equal(t, 2, len(info.Tracks))
require.Equal(t, 8, len(info.Segments))
assert.Equal(t, uint32(1), info.Tracks[0].TrackID)
assert.Equal(t, uint32(90000), info.Tracks[0].Timescale)
assert.Equal(t, uint32(2), info.Tracks[1].TrackID)
assert.Equal(t, uint32(44100), info.Tracks[1].Timescale)
assert.Equal(t, uint32(1), info.Segments[0].TrackID)
assert.Equal(t, uint64(1227), info.Segments[0].MoofOffset)
assert.Equal(t, uint64(0), info.Segments[0].BaseMediaDecodeTime)
assert.Equal(t, uint32(9000), info.Segments[0].DefaultSampleDuration)
assert.Equal(t, uint32(3), info.Segments[0].SampleCount)
assert.Equal(t, uint32(27000), info.Segments[0].Duration)
assert.Equal(t, int32(18000), info.Segments[0].CompositionTimeOffset)
assert.Equal(t, uint32(1054), info.Segments[0].Size)
assert.Equal(t, uint32(2), info.Segments[1].TrackID)
assert.Equal(t, uint64(2417), info.Segments[1].MoofOffset)
assert.Equal(t, uint64(0), info.Segments[1].BaseMediaDecodeTime)
assert.Equal(t, uint32(8830), info.Segments[1].DefaultSampleDuration)
assert.Equal(t, uint32(5), info.Segments[1].SampleCount)
assert.Equal(t, uint32(13407), info.Segments[1].Duration)
assert.Equal(t, int32(0), info.Segments[1].CompositionTimeOffset)
assert.Equal(t, uint32(177), info.Segments[1].Size)
assert.Equal(t, uint32(1), info.Segments[2].TrackID)
assert.Equal(t, uint64(2742), info.Segments[2].MoofOffset)
assert.Equal(t, uint64(27000), info.Segments[2].BaseMediaDecodeTime)
assert.Equal(t, uint32(9000), info.Segments[2].DefaultSampleDuration)
assert.Equal(t, uint32(2), info.Segments[2].SampleCount)
assert.Equal(t, uint32(18000), info.Segments[2].Duration)
assert.Equal(t, int32(18000), info.Segments[2].CompositionTimeOffset)
assert.Equal(t, uint32(282), info.Segments[2].Size)
assert.Equal(t, uint32(2), info.Segments[3].TrackID)
assert.Equal(t, uint64(3152), info.Segments[3].MoofOffset)
assert.Equal(t, uint64(13407), info.Segments[3].BaseMediaDecodeTime)
assert.Equal(t, uint32(1024), info.Segments[3].DefaultSampleDuration)
assert.Equal(t, uint32(9), info.Segments[3].SampleCount)
assert.Equal(t, uint32(9216), info.Segments[3].Duration)
assert.Equal(t, int32(0), info.Segments[3].CompositionTimeOffset)
assert.Equal(t, uint32(271), info.Segments[3].Size)
}
func TestProbeFra(t *testing.T) {
f, err := os.Open("./testdata/sample_fragmented.mp4")
require.NoError(t, err)
defer f.Close()
info, err := ProbeFra(f)
require.NoError(t, err)
require.Equal(t, 2, len(info.Tracks))
require.Equal(t, 8, len(info.Segments))
assert.Equal(t, uint32(1), info.Tracks[0].TrackID)
assert.Equal(t, uint32(90000), info.Tracks[0].Timescale)
assert.Equal(t, uint32(2), info.Tracks[1].TrackID)
assert.Equal(t, uint32(44100), info.Tracks[1].Timescale)
assert.Equal(t, uint32(1), info.Segments[0].TrackID)
assert.Equal(t, uint64(1227), info.Segments[0].MoofOffset)
assert.Equal(t, uint64(0), info.Segments[0].BaseMediaDecodeTime)
assert.Equal(t, uint32(9000), info.Segments[0].DefaultSampleDuration)
assert.Equal(t, uint32(3), info.Segments[0].SampleCount)
assert.Equal(t, uint32(27000), info.Segments[0].Duration)
assert.Equal(t, int32(18000), info.Segments[0].CompositionTimeOffset)
assert.Equal(t, uint32(2), info.Segments[1].TrackID)
assert.Equal(t, uint64(2417), info.Segments[1].MoofOffset)
assert.Equal(t, uint64(0), info.Segments[1].BaseMediaDecodeTime)
assert.Equal(t, uint32(8830), info.Segments[1].DefaultSampleDuration)
assert.Equal(t, uint32(5), info.Segments[1].SampleCount)
assert.Equal(t, uint32(13407), info.Segments[1].Duration)
assert.Equal(t, int32(0), info.Segments[1].CompositionTimeOffset)
assert.Equal(t, uint32(1), info.Segments[2].TrackID)
assert.Equal(t, uint64(2742), info.Segments[2].MoofOffset)
assert.Equal(t, uint64(27000), info.Segments[2].BaseMediaDecodeTime)
assert.Equal(t, uint32(9000), info.Segments[2].DefaultSampleDuration)
assert.Equal(t, uint32(2), info.Segments[2].SampleCount)
assert.Equal(t, uint32(18000), info.Segments[2].Duration)
assert.Equal(t, int32(18000), info.Segments[2].CompositionTimeOffset)
assert.Equal(t, uint32(2), info.Segments[3].TrackID)
assert.Equal(t, uint64(3152), info.Segments[3].MoofOffset)
assert.Equal(t, uint64(13407), info.Segments[3].BaseMediaDecodeTime)
assert.Equal(t, uint32(1024), info.Segments[3].DefaultSampleDuration)
assert.Equal(t, uint32(9), info.Segments[3].SampleCount)
assert.Equal(t, uint32(9216), info.Segments[3].Duration)
assert.Equal(t, int32(0), info.Segments[3].CompositionTimeOffset)
}
func TestDetectAACProfile(t *testing.T) {
testCases := []struct {
name string
esds *Esds
expectedOTI uint8
expectedAudOTI uint8
}{
{
name: "40.2",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x2 (5bits), sample-frequency-index (4bits), padding (7bits)
0x10, 0x00,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 2,
},
{
name: "40.5 ExtAudType=5 SBR=1 SFI=0x0",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x2 (5bits), sample-frequency-index (4bits),
// channel config (4bits), sync-extension-type=0x2b7 (11bits),
0x10, 0x02, 0xb7,
// audio-object-type=0x5 (5bits), sbr=1 (1bit), sfi=0x0 (4bits), padding (6bits)
0x2c, 0x00,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 5,
},
{
name: "40.29 ExtAudType=5 SBR=1 SFI=0xf PS=1",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x2 (5bits), sample-frequency-index (4bits),
// channel config (4bits), sync-extension-type=0x2b7 (11bits),
0x10, 0x02, 0xb7,
// audio-object-type=0x5 (5bits), sbr=1 (1bit), sfi=0xf (4bits), ext (24bits),
// sync-extension-type=0x548 (11bits), ps=1 (1bit), padding (2bits)
0x2f, 0xc0, 0x00, 0x00, 0x2a, 0x44,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 29,
},
{
name: "40.5 ExtAudType=5 SBR=1 SFI=0xf PS=0",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x2 (5bits), sample-frequency-index (4bits),
// channel config (4bits), sync-extension-type=0x2b7 (11bits),
0x10, 0x02, 0xb7,
// audio-object-type=0x5 (5bits), sbr=1 (1bit), sfi=0xf (4bits), ext (24bits),
// sync-extension-type=0x548 (11bits), ps=1 (1bit), padding (2bits)
0x2f, 0xc0, 0x00, 0x00, 0x2a, 0x40,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 5,
},
{
name: "40.2 sample-frequency-index=0xf",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x2 (5bits), sample-frequency-index=0xf (4bits), ext(24bits), padding(7bits)
0x17, 0x80, 0x00, 0x00, 0x00,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 2,
},
{
name: "40.42",
esds: &Esds{
Descriptors: []Descriptor{
{Tag: DecoderConfigDescrTag, DecoderConfigDescriptor: &DecoderConfigDescriptor{ObjectTypeIndication: 0x40}},
{Tag: DecSpecificInfoTag, Data: []byte{
// audio-object-type=0x1f (5bits), 0xa (6bits)
// sample-frequency-index (4bits), padding (1bits)
0xf9, 0x40,
}},
},
},
expectedOTI: 0x40,
expectedAudOTI: 42,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
oti, audOTI, err := detectAACProfile(tc.esds)
require.NoError(t, err)
assert.Equal(t, tc.expectedOTI, oti)
assert.Equal(t, tc.expectedAudOTI, audOTI)
})
}
}
func TestSamplesGetBitrate(t *testing.T) {
assert.Equal(t, uint64(0), Samples{}.GetBitrate(100))
assert.Equal(t, uint64(14400), // = 900 / (50 / 100) * 8
Samples{
{TimeDelta: 10, Size: 100},
{TimeDelta: 10, Size: 200},
{TimeDelta: 10, Size: 300},
{TimeDelta: 10, Size: 100},
{TimeDelta: 10, Size: 200},
}.GetBitrate(100))
}
func TestSamplesGetMaxBitrate(t *testing.T) {
assert.Equal(t, uint64(0), Samples{}.GetMaxBitrate(100, 20))
assert.Equal(t, uint64(20000), // = 500 / (20 / 100) * 8
Samples{
{TimeDelta: 10, Size: 100},
{TimeDelta: 10, Size: 200},
{TimeDelta: 10, Size: 300},
{TimeDelta: 10, Size: 100},
{TimeDelta: 10, Size: 200},
}.GetMaxBitrate(100, 20))
}
func TestSegmentsGetBitrate(t *testing.T) {
assert.Equal(t, uint64(0), Segments{}.GetBitrate(2, 100))
assert.Equal(t, uint64(14400), // = 900 / (50 / 100) * 8
Segments{
{TrackID: 1, Duration: 10, Size: 300},
{TrackID: 2, Duration: 10, Size: 100},
{TrackID: 2, Duration: 10, Size: 200},
{TrackID: 1, Duration: 10, Size: 200},
{TrackID: 2, Duration: 10, Size: 300},
{TrackID: 3, Duration: 10, Size: 700},
{TrackID: 2, Duration: 10, Size: 100},
{TrackID: 1, Duration: 10, Size: 800},
{TrackID: 2, Duration: 10, Size: 200},
}.GetBitrate(2, 100))
}
func TestSegmentsGetMaxBitrate(t *testing.T) {
assert.Equal(t, uint64(0), Segments{}.GetMaxBitrate(2, 100))
assert.Equal(t, uint64(24000), // = 300 / (10 / 100) * 8
Segments{
{TrackID: 1, Duration: 10, Size: 300},
{TrackID: 2, Duration: 10, Size: 100},
{TrackID: 2, Duration: 10, Size: 200},
{TrackID: 1, Duration: 10, Size: 200},
{TrackID: 2, Duration: 10, Size: 300},
{TrackID: 3, Duration: 10, Size: 700},
{TrackID: 2, Duration: 10, Size: 100},
{TrackID: 1, Duration: 10, Size: 800},
{TrackID: 2, Duration: 10, Size: 200},
}.GetMaxBitrate(2, 100))
}