[FFmpeg-trac] #9852(undetermined:new): Single TS transcoding produces incorrect results using H265 HLS
FFmpeg
trac at avcodec.org
Sun Jul 31 14:53:32 EEST 2022
#9852: Single TS transcoding produces incorrect results using H265 HLS
-------------------------------------+-------------------------------------
Reporter: kirill_p | 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:
Given MP4 file (recorded by IPhone 13 mini) with H265 codec. Splitting it
to an HLS without transcoding (codec copy), and then doing a full
transcode of a single segment - TS, let's say the second segment. Then
generating a new m3u8 index file, with all the original information,
except that the second segment now points to a new transcoded file. The
new m3u8 playback will contain errors:
FFPlay reports [mpegts @ 00000286995b9180] Packet corrupt (stream = 0, dts
= 402000).
VLC stucks, shows black frame for a moment, at the beginning and the end
of the second segment.
Expected: The HLS will play without interruptions. The same flow works
perfectly with H264 codec.
How to reproduce:
Generating HLS:
{{{
% ffmpeg -i original.mp4 -c:v copy -an -bsf:v hevc_mp4toannexb -crf 18 -g
30 -sc_threshold 0 -f hls -start_number 0 -hls_time 3 -hls_list_size 0
o.m3u8
ffmpeg version n5.1-1-g6d83c5f876-20220730 Copyright (c) 2000-2022 the
FFmpeg developers
built with gcc 12.1.0 (crosstool-NG 1.25.0.55_3defb7b)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib
--enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth
--enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-
ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-
libopus --enable-librist --enable-libtheora --enable-libvpx --enable-
libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-
libopenmpt --enable-librav1e --enable-librubberband --enable-schannel
--enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1
--enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi
--enable-libvidstab --enable-vulkan --enable-libshaderc --enable-
libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-
libxvid --enable-libzimg --enable-libzvbi --extra-
cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread
--extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220730
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'original.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomdby1iso2mp41
encoder : Lavf59.8.100
Duration: 00:00:25.57, start: 0.000000, bitrate: 8740 kb/s
Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668),
yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 1920x1080, 8565 kb/s, SAR
1:1 DAR 16:9, 30 fps, 30 tbr, 19200 tbn (default)
Metadata:
handler_name : Core Media Video
vendor_id : [0][0][0][0]
Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
stereo, fltp, 166 kb/s (default)
Metadata:
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Output #0, hls, to 'o.m3u8':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomdby1iso2mp41
encoder : Lavf59.27.100
Stream #0:0(und): Video: hevc (Main 10) (hvc1 / 0x31637668),
yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 1920x1080 [SAR 1:1 DAR
16:9], q=2-31, 8565 kb/s, 30 fps, 30 tbr, 90k tbn (default)
Metadata:
handler_name : Core Media Video
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[hls @ 00000264499e2740] Opening 'o0.ts' for writing6 bitrate=N/A
speed=N/A
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o1.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o2.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o3.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o4.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o5.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o6.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o7.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
[hls @ 00000264499e2740] Opening 'o8.ts' for writing
[hls @ 00000264499e2740] Opening 'o.m3u8.tmp' for writing
frame= 767 fps=0.0 q=-1.0 Lsize=N/A time=00:00:25.46 bitrate=N/A speed=
158x
video:26735kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
}}}
Single TS transcode:
{{{
% ffmpeg -i o1.ts -c:v libx265 -x265-params no-open-gop=1:no-scenecut=1
-crf 18 -g 30 -preset fast -copyts -copytb 1 -muxdelay 0 o1edited.ts
ffmpeg version n5.1-1-g6d83c5f876-20220730 Copyright (c) 2000-2022 the
FFmpeg developers
built with gcc 12.1.0 (crosstool-NG 1.25.0.55_3defb7b)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib
--enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth
--enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-
ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-
libopus --enable-librist --enable-libtheora --enable-libvpx --enable-
libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-
libopenmpt --enable-librav1e --enable-librubberband --enable-schannel
--enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1
--enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi
--enable-libvidstab --enable-vulkan --enable-libshaderc --enable-
libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-
libxvid --enable-libzimg --enable-libzvbi --extra-
cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread
--extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220730
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, mpegts, from 'o1.ts':
Duration: 00:00:03.10, start: 4.666667, bitrate: 9172 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: hevc (Main 10) (HEVC / 0x43564548),
yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 1920x1080, 30 fps, 30 tbr,
90k tbn
Stream mapping:
Stream #0:0 -> #0:0 (hevc (native) -> hevc (libx265))
Press [q] to stop, [?] for help
[hevc @ 000002ca49c93a80] Multiple Dolby Vision RPUs found in one AU.
Skipping previous.
[hevc @ 000002ca49920e80] Multiple Dolby Vision RPUs found in one AU.
Skipping previous.
[hevc @ 000002ca49921280] Multiple Dolby Vision RPUs found in one AU.
Skipping previous.
x265 [info]: HEVC encoder version 3.5+38-20255e6f0
x265 [info]: build info [Windows][GCC 12.1.0][64 bit] 10bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX
FMA3 BMI2 AVX2
x265 [info]: Main 10 profile, Level-4 (Main tier)
x265 [info]: Thread pool created using 4 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 2 / wpp(17 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 2
x265 [info]: Lookahead / bframes / badapt : 15 / 4 / 0
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-18.0 / 0.60
x265 [info]: tools: rd=2 psy-rd=2.00 rskip mode=1 signhide tmvp fast-intra
x265 [info]: tools: strong-intra-smoothing lslices=6 deblock sao
Output #0, mpegts, to 'o1edited.ts':
Metadata:
encoder : Lavf59.27.100
Stream #0:0: Video: hevc, yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67,
progressive), 1920x1080, q=2-31, 30 fps, 90k tbn
Metadata:
encoder : Lavc59.37.100 libx265
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 93 fps=7.1 q=23.8 Lsize= 3835kB time=00:00:03.03
bitrate=10358.3kbits/s speed=0.233x
video:3731kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 2.809286%
x265 [info]: frame I: 4, Avg QP:18.85 kb/s: 25288.08
x265 [info]: frame P: 19, Avg QP:20.14 kb/s: 21011.96
x265 [info]: frame B: 70, Avg QP:23.99 kb/s: 5915.63
x265 [info]: Weighted P-Frames: Y:31.6% UV:31.6%
x265 [info]: consecutive B-frames: 17.4% 4.3% 0.0% 13.0% 65.2%
encoded 93 frames in 12.92s (7.20 fps), 9833.05 kb/s, Avg QP:22.98
}}}
The latest FFMPEG that was used was downloaded today from
https://github.com/BtbN/FFmpeg-Builds/releases (Latest Auto-Build
(2022-07-30 12:38), ffmpeg-n5.1-latest-win64-gpl-5.1.zip)
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9852>
FFmpeg <https://ffmpeg.org>
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