#10711: Parsing dash/vp9 chunk fails with "error reading header"
-------------------------------------+-------------------------------------
Reporter: paul31415 | Type: defect
Status: new | Priority: normal
Component: | Version: git-
undetermined | master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug: ffprobe fails with "error reading header"
How to reproduce:
The data is small (800b), so I attached a base64 command line to generated
the data (I also attache the binary if it's more convenient).
{{{
echo
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
AAAAAAAAAAUc3RzegAAAAAAAAAAAAAAAAAAABBzdHNzAAAAAAAAAAAAAAAUdm1oZAAAAAEAAAAAAAAAAA==
| base64 -d -o data
}}}
Calling ffprobe (or ffmpeg) on the data seems to fail with a reading
header issue:
{{{
ffprobe -v 9 -loglevel 99 data
ffprobe version N-112876-ga30adf9f96 Copyright (c) 2007-2023 the FFmpeg
developers
built with Apple clang version 15.0.0 (clang-1500.0.40.1)
configuration: --extra-libs= --extra-ldflags= --extra-ldexeflags= --pkg-
config-flags=--static --disable-autodetect --prefix=/Users/paul/git
/ffmpeg-static-builder/dist/mac/arm64//ffmpeg --enable-version3 --pkg-
config=pkg-config --enable-runtime-cpudetect --enable-pthreads --disable-
w32threads --enable-libtheora --enable-libvpx --enable-libvorbis
--disable-indev=sndio --disable-outdev=sndio --enable-neon --enable-
libopenjpeg --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-gpl --enable-openssl --enable-libvo-amrwbenc --enable-libopus
--enable-libx264 --enable-libx265 --enable-libaom --enable-libwebp
--enable-libxvid --enable-libmp3lame --enable-zlib --enable-ffprobe
--enable-pic --disable-doc --enable-demuxer=dash --enable-libxml2
libavutil 58. 32.100 / 58. 32.100
libavcodec 60. 35.100 / 60. 35.100
libavformat 60. 18.100 / 60. 18.100
libavdevice 60. 4.100 / 60. 4.100
libavfilter 9. 14.100 / 9. 14.100
libswscale 7. 6.100 / 7. 6.100
libswresample 4. 13.100 / 4. 13.100
libpostproc 57. 4.100 / 57. 4.100
[AVFormatContext @ 0x12a605930] Opening 'bin' for reading
[file @ 0x600003990e00] Setting default whitelist 'file,crypto,data'
Probing mov,mp4,m4a,3gp,3g2,mj2 score:100 size:808
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'ftyp' parent:'root' sz: 24 8
808
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] ISO: File Type Major Brand: dash
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'moov' parent:'root' sz: 784
32 808
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'mvhd' parent:'moov' sz: 108
8 776
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] time scale = 1000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'mvex' parent:'moov' sz: 40
116 776
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'trex' parent:'mvex' sz: 32 8
32
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'trak' parent:'moov' sz: 628
156 776
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'tkhd' parent:'trak' sz: 92 8
620
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'mdia' parent:'trak' sz: 528
100 620
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'mdhd' parent:'mdia' sz: 32 8
520
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'hdlr' parent:'mdia' sz: 95
40 520
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] ctype=[0][0][0][0]
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] stype=vide
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'minf' parent:'mdia' sz: 393
135 520
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'dinf' parent:'minf' sz: 36 8
385
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'dref' parent:'dinf' sz: 28 8
28
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] Unknown dref type 0x206c7275 size
12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'stbl' parent:'minf' sz: 329
44 385
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'stsd' parent:'stbl' sz: 237
8 321
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] size=221 4CC=vp09 codec_type=0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'vpcC' parent:'stsd' sz: 20 8
135
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'colr' parent:'stsd' sz: 19
28 135
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] nclx: pri 9 trc 16 matrix 9 full 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'mdcv' parent:'stsd' sz: 32
47 135
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] type:'SmDm' parent:'stsd' sz: 36
79 135
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x12a605930] error reading header
[AVIOContext @ 0x12a605ba0] Statistics: 808 bytes read, 0 seeks
bin: Invalid data found when processing input
}}}
Some context: this files comes from a HLS stream and is the first chunk of
the stream.
The data seems valid, as mediainfo seems to parse it properly:
{{{
mediainfo bin
General
Complete name : bin
Format : dash
Codec ID : dash (iso6/mp41)
File size : 808 Bytes
Encoded date : 2023-12-01 02:17:00 UTC
Tagged date : 2023-12-01 02:17:00 UTC
Video
ID : 1
Format : vp09
HDR format : SMPTE ST 2086, HDR10 compatible
Codec ID : vp09
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Color space : YUV
Title : ISO Media file produced by
Google Inc. Created on: 11/30/2023.
Encoded date : 2023-12-01 02:17:00 UTC
Tagged date : 2023-12-01 02:17:00 UTC
Color range : Limited
Color primaries : BT.2020
Transfer characteristics : PQ
Matrix coefficients : BT.2020 non-constant
Mastering display color primaries : R: x=0.678000 y=0.322000, G:
x=0.245000 y=0.703000, B: x=0.138000 y=0.052000, White point: x=0.312700
y=0.329000
Mastering display luminance : min: 0.0001 cd/m2, max: 1000
cd/m2
Maximum Content Light Level : 1100 cd/m2
Maximum Frame-Average Light Level : 180 cd/m2
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10711>
FFmpeg <https://ffmpeg.org>
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