Hi,
We are recording h.264 video, muxing it into an mp4 container (using gstreamer), and then trying to save it to an iPad2 and play it back. Not streaming, just saving the video and playing it back. The result is a video of the correct length, with audio, but black video. The xcode console does not give us any grief, just fails silently. I believe that I've changed our codec parameters to be compliant with the iPad2:
h264params.profileIdc = 77; // main
h264params.levelIdc = 31; // 3.1
h264params.entropyMode = 0;
h264params.transform8x8FlagIntraFrame = 0;
h264params.transform8x8FlagInterFrame = 0;
h264params.seqScalingFlag = 0;
We initially suspected our muxer, but if we re-containerize the elementary stream with ffmpeg, it still doesn't work. However, if we "transcode" it to h.264 using ffmpeg, it works.
Anyone have playback working? Any ideas?
Thanks!
Paul
This is a dump of our original video using mp4dump:
mp4dump version 1.6
Dumping 2011-11-03-19-07-43.mp4 meta-information...
type ftyp
majorBrand = mp42
minorVersion = 0 (0x00000000)
<table entries suppressed>
type free
type mdat
type moov
type mvhd
version = 0 (0x00)
flags = 0 (0x000000)
creationTime = 3403217264 (0xcad8f970)
modificationTime = 3403217264 (0xcad8f970)
timeScale = 1000 (0x000003e8)
duration = 19113 (0x00004aa9)
rate = 1.000000
volume = 1.000000
reserved1 = <70 bytes>
00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00
00 00 00 00 00 00 00 00 00 00 40 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00
nextTrackId = 3 (0x00000003)
type trak
type tkhd
version = 0 (0x00)
flags = 7 (0x000007)
creationTime = 3403217264 (0xcad8f970)
modificationTime = 3403217264 (0xcad8f970)
trackId = 1 (0x00000001)
reserved1 = <4 bytes> 00 00 00 00
duration = 19100 (0x00004a9c)
reserved2 = <12 bytes> 00 00 00 00 00 00 00 00 00 00 00 00
volume = 0.000000
reserved3 = <2 bytes> 00 00
matrix = <36 bytes>
00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00
width = 640.000000
height = 480.000000
type mdia
type mdhd
version = 0 (0x00)
flags = 0 (0x000000)
creationTime = 3403217264 (0xcad8f970)
modificationTime = 3403217264 (0xcad8f970)
timeScale = 30 (0x0000001e)
duration = 573 (0x0000023d)
language = 0 (0x0000)
reserved = <2 bytes> 00 00
type hdlr
version = 0 (0x00)
flags = 0 (0x000000)
reserved1 = <4 bytes> 00 00 00 00
handlerType = vide
reserved2 = <12 bytes> 00 00 00 00 00 00 00 00 00 00 00 00
name = VideoHandler
type minf
type vmhd
version = 0 (0x00)
flags = 1 (0x000001)
reserved = <8 bytes> 00 00 00 00 00 00 00 00
type dinf
type dref
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
type url
version = 0 (0x00)
flags = 1 (0x000001)
location = (null)
type stbl
type stsd
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
type avc1
reserved1 = <6 bytes> 00 00 00 00 00 00
dataReferenceIndex = 1 (0x0001)
reserved2 = <16 bytes> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
width = 640 (0x0280)
height = 480 (0x01e0)
reserved3 = <14 bytes> 00 48 00 00 00 48 00 00 00 00 00 00 00 01
compressorName =
reserved4 = <4 bytes> 00 18 ff ff
type avcC
configurationVersion = 1 (0x01)
AVCProfileIndication = 77 (0x4d)
profile_compatibility = 0 (0x00)
AVCLevelIndication = 31 (0x1f)
reserved = 63 (0x3f) <6 bits>
lengthSizeMinusOne = 3 (0x3) <2 bits>
reserved1 = 7 (0x7) <3 bits>
numOfSequenceParameterSets = 1 (0x01) <5 bits>
<table entries suppressed>
numOfPictureParameterSets = 1 (0x01)
<table entries suppressed>
type stts
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 50 (0x00000032)
<table entries suppressed>
type stss
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 19 (0x00000013)
<table entries suppressed>
type stsc
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
<table entries suppressed>
type stsz
version = 0 (0x00)
flags = 0 (0x000000)
sampleSize = 0 (0x00000000)
sampleCount = 549 (0x00000225)
<table entries suppressed>
type stco
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 549 (0x00000225)
<table entries suppressed>
type trak
type tkhd
version = 0 (0x00)
flags = 7 (0x000007)
creationTime = 3403217264 (0xcad8f970)
modificationTime = 3403217264 (0xcad8f970)
trackId = 2 (0x00000002)
reserved1 = <4 bytes> 00 00 00 00
duration = 19113 (0x00004aa9)
reserved2 = <12 bytes> 00 00 00 00 00 00 00 00 00 00 00 00
volume = 1.000000
reserved3 = <2 bytes> 00 00
matrix = <36 bytes>
00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00
width = 0.000000
height = 0.000000
type mdia
type mdhd
version = 0 (0x00)
flags = 0 (0x000000)
creationTime = 3403217264 (0xcad8f970)
modificationTime = 3403217264 (0xcad8f970)
timeScale = 15920 (0x00003e30)
duration = 304286 (0x0004a49e)
language = 0 (0x0000)
reserved = <2 bytes> 00 00
type hdlr
version = 0 (0x00)
flags = 0 (0x000000)
reserved1 = <4 bytes> 00 00 00 00
handlerType = soun
reserved2 = <12 bytes> 00 00 00 00 00 00 00 00 00 00 00 00
name = SoundHandler
type minf
type smhd
version = 0 (0x00)
flags = 0 (0x000000)
reserved = <4 bytes> 00 00 00 00
type dinf
type dref
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
type url
version = 0 (0x00)
flags = 1 (0x000001)
location = (null)
type stbl
type stsd
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
type mp4a
reserved1 = <6 bytes> 00 00 00 00 00 00
dataReferenceIndex = 1 (0x0001)
soundVersion = 0 (0x0000)
reserved2 = <6 bytes> 00 00 00 00 00 00
channels = 1 (0x0001)
sampleSize = 16 (0x0010)
packetSize = 0 (0x0000)
timeScale = 15920 (0x00003e30)
reserved3 = <2 bytes> 00 00
type esds
version = 0 (0x00)
flags = 0 (0x000000)
ESID = 2 (0x0002)
streamDependenceFlag = 0 (0x0) <1 bits>
URLFlag = 0 (0x0) <1 bits>
OCRstreamFlag = 0 (0x0) <1 bits>
streamPriority = 0 (0x00) <5 bits>
decConfigDescr
objectTypeId = 64 (0x40)
streamType = 5 (0x05) <6 bits>
upStream = 0 (0x0) <1 bits>
reserved = 1 (0x1) <1 bits>
bufferSizeDB = 0 (0x000000) <24 bits>
maxBitrate = 0 (0x00000000)
avgBitrate = 0 (0x00000000)
decSpecificInfo
info = <2 bytes> 14 08
profileLevelIndicationIndexDescr
slConfigDescr
predefined = 2 (0x02)
ipiPtr
ipIds
ipmpDescrPtr
langDescr
qosDescr
regDescr
extDescr
type stts
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 295 (0x00000127)
<table entries suppressed>
type stsc
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 1 (0x00000001)
<table entries suppressed>
type stsz
version = 0 (0x00)
flags = 0 (0x000000)
sampleSize = 0 (0x00000000)
sampleCount = 297 (0x00000129)
<table entries suppressed>
type stco
version = 0 (0x00)
flags = 0 (0x000000)
entryCount = 297 (0x00000129)
<table entries suppressed>
