[FFmpeg-trac] #8636(undetermined:new): Invalid byteranges in 1fps iframes-only HLS playlist
FFmpeg
trac at avcodec.org
Mon Apr 27 12:04:02 EEST 2020
#8636: Invalid byteranges in 1fps iframes-only HLS playlist
-------------------------------------+-------------------------------------
Reporter: fidothe | Type: defect
Status: new | Priority: normal
Component: | Version:
undetermined | unspecified
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Generating an HLS trick mode 1fps video (EXT-X-KEYFRAMES-ONLY) where all
frames are IDR frames generates broken byteranges in the .m3u8.
The video itself is fine, it's just the .m3u8 playlist.
The playlist contains byteranges that look like this:
{{{
#EXTINF:1.000000,
#EXT-X-BYTERANGE:0 at 0
iframes-g1.m4s
#EXTINF:1.000000,
#EXT-X-BYTERANGE:0 at 1902
iframes-g1.m4s
#EXTINF:1.000000,
#EXT-X-BYTERANGE:0 at 2391
iframes-g1.m4s
#EXTINF:1.000000,
#EXT-X-BYTERANGE:0 at 2880
iframes-g1.m4s
#EXTINF:1.000000,
#EXT-X-BYTERANGE:0 at 7849
iframes-g1.m4s
}}}
All the ranges are reported as being 0 bytes long.
I've tried this with several videos and with different h.264 encoders
(libx264 and videotoolbox) with the same results.
This example uses a 20-second extract from the 1080p render of Tears of
Steel: https://mango.blender.org/download/, created with:
{{{
$ ffmpeg -t 20 -i tears_of_steel_1080p.mov -c copy tears-short.mp4
}}}
How to reproduce:
{{{
$ ffmpeg -threads 0 -report -i tears-short.mp4 \
-map 0:v \
-c:v libx264 -r 1 -g 1 \
-an \
-f hls -hls_playlist_type vod -hls_time 1 \
-hls_flags single_file+iframes_only \
-hls_segment_type fmp4 -hls_list_size 0 \
iframes-g1.m3u8
ffmpeg started on 2020-04-27 at 09:59:46
Report written to "ffmpeg-20200427-095946.log"
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.17)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared
--enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-
cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl
--enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus
--enable-librubberband --enable-libsnappy --enable-libtesseract --enable-
libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-
libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma
--enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-
libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-
videotoolbox --disable-libjack --disable-indev=jack
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'tears-short.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:00:20.04, start: 0.000000, bitrate: 3801 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p,
1920x800 [SAR 1:1 DAR 12:5], 3603 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc
(default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo,
fltp, 191 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7fd08d00ce00] using SAR=1/1
[libx264 @ 0x7fd08d00ce00] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fd08d00ce00] profile High, level 4.0
[libx264 @ 0x7fd08d00ce00] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC
codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options:
cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6
lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=1
keyint_min=1 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[hls @ 0x7fd08d009a00] Opening 'iframes-g1.m4s' for writing
Output #0, hls, to 'iframes-g1.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Stream #0:0(eng): Video: h264 (libx264), yuv420p, 1920x800 [SAR 1:1
DAR 12:5], q=-1--1, 1 fps, 16384 tbn, 1 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc58.54.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 12 fps=0.0 q=12.0 size=N/A time=00:00:05.00 bitrate=N/A dup=0
drop=248 frame= 17 fps= 17 q=16.0 size=N/A time=00:00:10.00 bitrate=N/A
dup=0 drop=341 frame= 20 fps= 13 q=17.0 size=N/A time=00:00:13.00
bitrate=N/A dup=0 drop=421 frame= 22 fps= 12 q=-1.0 Lsize=N/A
time=00:00:22.00 bitrate=N/A dup=0 drop=459 speed=11.5x
video:1782kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
[libx264 @ 0x7fd08d00ce00] frame I:22 Avg QP: 6.81 size: 82926
[libx264 @ 0x7fd08d00ce00] mb I I16..4: 57.4% 27.9% 14.7%
[libx264 @ 0x7fd08d00ce00] 8x8 transform intra:27.9%
[libx264 @ 0x7fd08d00ce00] coded y,uvDC,uvAC intra: 40.9% 41.3% 34.8%
[libx264 @ 0x7fd08d00ce00] i16 v,h,dc,p: 93% 1% 3% 3%
[libx264 @ 0x7fd08d00ce00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 18% 12% 6%
6% 7% 7% 9% 9%
[libx264 @ 0x7fd08d00ce00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 19% 9% 6%
9% 8% 9% 6% 7%
[libx264 @ 0x7fd08d00ce00] i8c dc,h,v,p: 73% 10% 12% 5%
[libx264 @ 0x7fd08d00ce00] kb/s:663.41
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/8636>
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