[FFmpeg-user] Using FFMpeg to produce LL-HLS
Simon Brown
simon.k.brown at gmail.com
Wed Feb 19 17:36:10 EET 2020
On Wed, 19 Feb 2020 at 15:19, Ted Park <kumowoon1025 at gmail.com> wrote:
>
> Hello,
>
> That’s sort of what a remux does in the first place.
> I take it you are going to re-encode after all, can you post the stdout
> and stderr output from running the commands? Is that the only error or are
> there more errors before that message as before?
> You can force the codec tag to be anything with -tag:v $TAG but I doubt
> that is relevant here.
>
> Regards,
> Ted Park
>
No, I'm not going to re-encode - I cannot afford the CPU power.
Yes, that is the only error. I have done this:
C:\xampp\htdocs>\ffmpeg-20200216-8578433-win64-static\bin\ffmpeg.exe
-fflags igndts+nofillin -i udp://127.0.0.1:9034 -map 0 -c:v copy -an -f
h264 udp://127.0.0.1:9036
in one DOS prompt, and this:
C:\xampp\htdocs>\ffmpeg-20200216-8578433-win64-static\bin\ffmpeg.exe -i
udp://127.0.0.1:9036 -codec copy -an -window_size 5 -extra_window_size 5
-use_timeline 1 -seg_duration 1 -frag_duration 0.2 -streaming 1
-adaptation_sets "id=0,streams=v id=1,streams=a" -dash_segment_type mp4
-ldash 1 -strict experimental -f dash manifest.mpd
in the second DOS prompt. This gives me a stream that I can view in a
browser, but latency is 8s which is not acceptable. We need it <1s if at
all possible.
So clearly if I send an h264 stream at the dash muxer it is happy, yet if I
just use the ts with -map 0 -c:v copy -an it doesn't work and gives the
earlier error.
There are other side effects in that it starts complaining about
non-monotonous DTS but that goes away after a while:
ffmpeg version git-2020-02-16-8578433 Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 9.2.1 (GCC) 20200122
configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libdav1d --enable-libbluray --enable-libfreetype
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
--enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
--enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
--enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va
--enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
--enable-libopenmpt --enable-amf
libavutil 56. 41.100 / 56. 41.100
libavcodec 58. 70.100 / 58. 70.100
libavformat 58. 38.101 / 58. 38.101
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 76.100 / 7. 76.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 3 with DTS 400001, packet 4 with DTS 800000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 5 with DTS 800001, packet 6 with DTS 1200000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 7 with DTS 1200001, packet 8 with DTS 1600000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 9 with DTS 1600001, packet 10 with DTS 2000000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 11 with DTS 2000001, packet 12 with DTS 2400000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 13 with DTS 2400001, packet 14 with DTS 9800000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 15 with DTS 9800001, packet 16 with DTS 10200000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 17 with DTS 10200001, packet 18 with DTS 10600000
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001b04824bec0] DTS discontinuity in stream 0:
packet 19 with DTS 10600001, packet 20 with DTS 11000000
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'udp://127.0.0.1:9036?listen':
Metadata:
major_brand : isml
minor_version : 512
compatible_brands: ismlpiff
encoder : Lavf58.38.101
Duration: 00:00:02.70, start: 0.000000, bitrate: N/A
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv),
1920x1080 [SAR 1:1 DAR 16:9], 1874 kb/s, 37.04 fps, 50 tbr, 10000k tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
[dash @ 000001b04942f040] Opening 'init-stream0.m4s' for writing
Output #0, dash, to 'manifest.mpd':
Metadata:
major_brand : isml
minor_version : 512
compatible_brands: ismlpiff
encoder : Lavf58.38.101
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv),
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 1874 kb/s, 37.04 fps, 50 tbr, 12800
tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[dash @ 000001b04942f040] Opening 'chunk-stream0-00001.m4s.tmp' for writing
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 0, current: 0; changing to 1. This may result in incorrect
timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 512, current: 512; changing to 513. This may result in incorrect
timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 1024, current: 1024; changing to 1025. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 1536, current: 1536; changing to 1537. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 2048, current: 2048; changing to 2049. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 2560, current: 2560; changing to 2561. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 3072, current: 3072; changing to 3073. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 12544, current: 12544; changing to 12545. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 13056, current: 13056; changing to 13057. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 13568, current: 13568; changing to 13569. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 14080, current: 14080; changing to 14081. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 14592, current: 14592; changing to 14593. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 15104, current: 15104; changing to 15105. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 15616, current: 15616; changing to 15617. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 16128, current: 16128; changing to 16129. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 16640, current: 16640; changing to 16641. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 17152, current: 17152; changing to 17153. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 17664, current: 17664; changing to 17665. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 18176, current: 18176; changing to 18177. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 18688, current: 18688; changing to 18689. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 19200, current: 19200; changing to 19201. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 19712, current: 19712; changing to 19713. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 20224, current: 20224; changing to 20225. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 20736, current: 20736; changing to 20737. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 21248, current: 21248; changing to 21249. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 21760, current: 21760; changing to 21761. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 22272, current: 22272; changing to 22273. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 22784, current: 22784; changing to 22785. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 23296, current: 23296; changing to 23297. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 23808, current: 23808; changing to 23809. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 24320, current: 24320; changing to 24321. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 24832, current: 24832; changing to 24833. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 25344, current: 25344; changing to 25345. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 25856, current: 25856; changing to 25857. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 26368, current: 26368; changing to 26369. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 26880, current: 26880; changing to 26881. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 27392, current: 27392; changing to 27393. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 27904, current: 27904; changing to 27905. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 28416, current: 28416; changing to 28417. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 28928, current: 28928; changing to 28929. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 29440, current: 29440; changing to 29441. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 29952, current: 29952; changing to 29953. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 30464, current: 30464; changing to 30465. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 30976, current: 30976; changing to 30977. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 31488, current: 31488; changing to 31489. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 32000, current: 32000; changing to 32001. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 32512, current: 32512; changing to 32513. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 33024, current: 33024; changing to 33025. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 33536, current: 33536; changing to 33537. This may result in
incorrect timestamps in the output file.
[dash @ 000001b04942f040] Non-monotonous DTS in output stream 0:0;
previous: 34048, current: 34048; changing to 34049. This may result in
incorrect timestamps in the output file.
udp://127.0.0.1:9036?listen: Immediate exit requested
[dash @ 000001b04942f040] Opening 'manifest.mpd.tmp' for writing
frame= 100 fps=2.5 q=-1.0 Lsize=N/A time=00:00:02.66 bitrate=N/A
speed=0.0664x
video:618kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Exiting normally, received signal 2.
C:\xampp\htdocs>
C:\xampp\htdocs>qqqqq
C:\xampp\htdocs>\users\simon\Downloads\ffmpeg-20200216-8578433-win64-static\bin\ffmpeg.exe
-i udp://127.0.0.1:9036 -codec copy -an -window_size 5 -extra_window_size 5
-use_timeline 1 -seg_duration 1 -frag_duration 0.2 -streaming 1
-adaptation_sets "id=0,streams=v id=1,streams=a" -dash_segment_type mp4
-ldash 1 -strict experimental -f dash manifest.mpd
ffmpeg version git-2020-02-16-8578433 Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 9.2.1 (GCC) 20200122
configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libdav1d --enable-libbluray --enable-libfreetype
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
--enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
--enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
--enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va
--enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
--enable-libopenmpt --enable-amf
libavutil 56. 41.100 / 56. 41.100
libavcodec 58. 70.100 / 58. 70.100
libavformat 58. 38.101 / 58. 38.101
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 76.100 / 7. 76.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, h264, from 'udp://127.0.0.1:9036':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (Main), yuv420p(tv, top first), 1920x1080 [SAR
1:1 DAR 16:9], 25 fps, 25 tbr, 1200k tbn, 50 tbc
[dash @ 000002424882ee80] No bit rate set for stream 0
[dash @ 000002424882ee80] Opening 'init-stream0.m4s' for writing
Output #0, dash, to 'manifest.mpd':
Metadata:
encoder : Lavf58.38.101
Stream #0:0: Video: h264 (Main), yuv420p(tv, top first), 1920x1080 [SAR
1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 12800 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[dash @ 000002424882ee80] Timestamps are unset in a packet for stream 0.
This is deprecated and will stop working in the future. Fix your code to
set the timestamps properly
[dash @ 000002424882ee80] Opening 'chunk-stream0-00001.m4s.tmp' for writing
[dash @ 000002424882ee80] Opening 'manifest.mpd.tmp' for writing
[dash @ 000002424882ee80] Opening 'chunk-stream0-00002.m4s.tmp' for writing
[dash @ 000002424882ee80] Opening 'manifest.mpd.tmp' for writing
[dash @ 000002424882ee80] Opening 'chunk-stream0-00003.m4s.tmp' for writing
[dash @ 000002424882ee80] Opening 'manifest.mpd.tmp' for writing speed=6.06x
[dash @ 000002424882ee80] Opening 'chunk-stream0-00004.m4s.tmp' for writing
Is the latency because of all the chaff at the start, or is it because of
FFMpeg's start up time, or something else?
Cheers,
Simon
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