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Sur d’autres sites (10849)
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ffmpeg Transcoding Stops After Few Seconds [migrated]
15 avril 2018, par Salem FI’m trying to do this over week now with no success,
What’s I’m trying to do is transcoding video from live streaming source and downscale it with FFmpeg, but every time I start transcoding it broadcasting for 11 sec and stop.The last command I tried :
ffmpeg -re -i 'http://source.com/1034.ts' -preset ultrafast http://localhost:2052/feed1.ffmI tried to download the .ts file with IDM and it finish downloading the file on the exact 12 Sec that FFmpeg stop trans coding on it.
Does that means that FFmpeg download that file as one segment and not continued reading the source video As what video players does usually. By the way, I tried with source with VLC player and it didn’t stop playing the the same source video.
I decided to pass FFmpeg command via FFserver config file
ffserver.confLaunch ffmpeg -i 'http://source.com/1.ts' -copyinkf -codec copyThe stream works fine for a while but after testing couple sources I notice it’s struggle to trans-coding HD videos.
I guess the issue with my VPS KVM server being very limited CPU and RAM ( 128MB only) ! Since I tried using
ultrafastpreset but din’t solve the issue, another thing, I notice when I enableAVOptionVideo crfsetting onffserver.conftrans-coding runs bit smoothly without frame-rate dropping.
Las my server usesXeon L5520CPU which is outdated CPU specially I gout 1/4 power of V single core (if they count HT it will be 1/8 of the real core) : (# vlc -I dummy 'https://source.com/1034.ts' --sout '#standard{access=http,mux=flv,dst=localhost:2052}'
VLC media player 2.2.8 Weatherwax (revision 2.2.7-14-g3cc1d8cba9)
[09d3fdf0] pulse audio output error: PulseAudio server connection failure: Connection refused
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "globalhotkeys,none" initialization failed
[09d279c0] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "dbus,none" initialization failed
[09d279c0] dummy interface: using the dummy interface module...
[b5e04ae0] access_output_http access out: Consider passing --http-host=IP on the command line instead.
[b5e38ab8] ts demux: MPEG-4 descriptor not found for pid 0x101 type 0xf
[b5e90ae0] packetizer_mpeg4audio decoder: AAC channels: 2 samplerate: 48000
[flv @ 0xb5e33b40] dimensions not set
[b5e06360] avformat mux error: could not write header: Invalid argument
[b5e88ef0] core decoder error: cannot continue streaming due to errors
[b5e90ae0] core decoder error: cannot continue streaming due to errorsHere output with
-loglevel verbose:~# ffmpeg -i http://source.com/1.ts -copyinkf -codec copy -loglevel verbose http://127.0.0.1:8090/feed1.ffm
ffmpeg version 2.6.9 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/i386-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/i386-linux-gnu
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Invalid UE golomb code
Last message repeated 2 times
Input #0, mpegts, from 'http://source.com/1.ts':
Duration: N/A, start: 30472.768167, bitrate: N/A
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 960x540 (960x544) [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 105 kb/s
[graph 0 input from stream 0:1 @ 0x971f2c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[audio format for output stream 0:0 @ 0x9844de0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
[auto-inserted resampler 0 @ 0x97115e0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:1 chl:mono fmt:fltp r:22050Hz
[graph 1 input from stream 0:0 @ 0x96f5d00] w:960 h:540 pixfmt:yuv420p tb:1/90000 fr:50/1 sar:1/1 sws_param:flags=2
[scaler for output stream 0:1 @ 0x96f5e80] w:352 h:240 flags:'0x4' interl:0
[scaler for output stream 0:1 @ 0x96f5e80] w:960 h:540 fmt:yuv420p sar:1/1 -> w:352 h:240 fmt:yuv420p sar:40/33 flags:0x4
Output #0, ffm, to 'http://127.0.0.1:8090/feed1.ffm':
Metadata:
creation_time : now
encoder : Lavf56.25.101
Stream #0:0: Audio: wmav2, 22050 Hz, mono, fltp, 64 kb/s
Metadata:
encoder : Lavc56.26.100 wmav2
Stream #0:1: Video: msmpeg4v3 (msmpeg4), yuv420p, 352x240 [SAR 40:33 DAR 16:9], q=2-31, 256 kb/s, 50 fps, 1000k tbn, 15 tbc
Metadata:
encoder : Lavc56.26.100 msmpeg4
Stream mapping:
Stream #0:1 -> #0:0 (aac (native) -> wmav2 (native))
Stream #0:0 -> #0:1 (h264 (native) -> msmpeg4v3 (msmpeg4))
Press [q] to stop, [?] for help
Invalid UE golomb code
*** dropping frame 3 from stream 1 at ts 1
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 4 from stream 1 at ts 2
Last message repeated 1 times
*** dropping frame 5 from stream 1 at ts 3
Last message repeated 1 times
*** dropping frame 5 from stream 1 at ts 4
*** dropping frame 6 from stream 1 at ts 4
Last message repeated 1 times
*** dropping frame 7 from stream 1 at ts 5
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 8 from stream 1 at ts 6
Last message repeated 1 times
*** dropping frame 8 from stream 1 at ts 7
*** dropping frame 9 from stream 1 at ts 7
Last message repeated 1 times
*** dropping frame 10 from stream 1 at ts 8
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 9
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 10
*** dropping frame 12 from stream 1 at ts 10
Last message repeated 1 times
*** dropping frame 13 from stream 1 at ts 11
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 12
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 13
*** dropping frame 15 from stream 1 at ts 13
Last message repeated 1 times
*** dropping frame 16 from stream 1 at ts 14
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 15
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 16
*** dropping frame 18 from stream 1 at ts 16
Last message repeated 1 times
*** dropping frame 19 from stream 1 at ts 17
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 18me=00:00:01.33 bitrate= 270.3kbits/s dup=0 drop=39
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 19
*** dropping frame 21 from stream 1 at ts 19
Last message repeated 1 times
*** dropping frame 22 from stream 1 at ts 20
Last message repeated 1 times
*** dropping frame 23 from stream 1 at ts 21
Last message repeated 1 times
*** dropping frame 23 from stream 1 at ts 22
*** dropping frame 24 from stream 1 at ts 22
Last message repeated 1 times
*** dropping frame 25 from stream 1 at ts 23
Last message repeated 1 times
*** dropping frame 26 from stream 1 at ts 24
Last message repeated 1 times
*** dropping frame 26 from stream 1 at ts 25
*** dropping frame 27 from stream 1 at ts 25
Last message repeated 1 times
*** dropping frame 28 from stream 1 at ts 26
Last message repeated 1 times
*** dropping frame 29 from stream 1 at ts 27
Last message repeated 1 times
*** dropping frame 29 from stream 1 at ts 28
*** dropping frame 30 from stream 1 at ts 28
Last message repeated 1 times
*** dropping frame 31 from stream 1 at ts 29
Last message repeated 1 times
*** dropping frame 32 from stream 1 at ts 30
Last message repeated 1 times
*** dropping frame 32 from stream 1 at ts 31
*** dropping frame 33 from stream 1 at ts 31
Last message repeated 1 times
*** dropping frame 34 from stream 1 at ts 32
Last message repeated 1 times
*** dropping frame 34 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 34
*** dropping frame 36 from stream 1 at ts 34
Last message repeated 1 times
*** dropping frame 37 from stream 1 at ts 35
Last message repeated 1 times
Invalid UE golomb code
*** dropping frame 38 from stream 1 at ts 36
Last message repeated 1 times
*** dropping frame 38 from stream 1 at ts 37
*** dropping frame 39 from stream 1 at ts 37
Last message repeated 1 times
*** dropping frame 40 from stream 1 at ts 38
Last message repeated 1 times
*** dropping frame 41 from stream 1 at ts 39me=00:00:02.73 bitrate= 311.7kbits/s dup=0 drop=88
Last message repeated 1 times
*** dropping frame 41 from stream 1 at ts 40
*** dropping frame 42 from stream 1 at ts 40
Last message repeated 1 times
*** dropping frame 43 from stream 1 at ts 41
Last message repeated 1 times
*** dropping frame 44 from stream 1 at ts 42
Last message repeated 1 times
*** dropping frame 44 from stream 1 at ts 43
*** dropping frame 45 from stream 1 at ts 43
Last message repeated 1 times
*** dropping frame 46 from stream 1 at ts 44
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*** dropping frame 47 from stream 1 at ts 45
Last message repeated 1 times
*** dropping frame 47 from stream 1 at ts 46
*** dropping frame 48 from stream 1 at ts 46
Last message repeated 1 times
*** dropping frame 49 from stream 1 at ts 47
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*** dropping frame 50 from stream 1 at ts 48
Last message repeated 1 times
*** dropping frame 50 from stream 1 at ts 49
*** dropping frame 51 from stream 1 at ts 49
Last message repeated 1 times
*** dropping frame 52 from stream 1 at ts 50
Last message repeated 1 times
*** dropping frame 53 from stream 1 at ts 51
Last message repeated 1 times
[h264 @ 0x9844a00] error while decoding MB 58 12, bytestream -5
[h264 @ 0x9844a00] concealing 1311 DC, 1311 AC, 1311 MV errors in B frame
*** dropping frame 53 from stream 1 at ts 52
No more output streams to write to, finishing.
frame= 55 fps= 42 q=4.3 Lsize= 152kB time=00:00:03.66 bitrate= 339.6kbits/s dup=0 drop=119
video:116kB audio:26kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.760316%
Input file #0 (http://source.com/1.ts):
Input stream #0:0 (video): 174 packets read (220322 bytes); 174 frames decoded;
Input stream #0:1 (audio): 156 packets read (36657 bytes); 156 frames decoded (159744 samples);
Total: 330 packets (256979 bytes) demuxed
Output file #0 (http://127.0.0.1:8090/feed1.ffm):
Output stream #0:0 (audio): 72 frames encoded (73383 samples); 72 packets muxed (26712 bytes);
Output stream #0:1 (video): 55 frames encoded; 55 packets muxed (119080 bytes);
Total: 127 packets (145792 bytes) muxedHere input URL file info After I download it to my PC with IDM
General
ID : 1 (0x1)
Complete name : D:\1.ts
Format : MPEG-TS
File size : 256 KiB
Duration : 2 s 520 ms
Overall bit rate mode : Variable
Overall bit rate : 788 kb/s
Video
ID : 256 (0x100)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Codec ID : 27
Duration : 2 s 680 ms
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Audio
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Muxing mode : ADTS
Codec ID : 15
Duration : 2 s 69 ms
Bit rate mode : Variable
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -12 ms
Menu
ID : 4096 (0x1000)
Menu ID : 1 (0x1)
Duration : 2 s 520 ms
List : 256 (0x100) (AVC) / 257 (0x101) (AAC)
Service name : Service01
Service provider : FFmpeg
Service type : digital television -
ffmpeg transcoding stop after few seconds
9 avril 2018, par Salem FHi i’m trying to do this over week now with no success ,
What’s i’m trying to do is transcoding video from live streaming source and downscale it with FFmpeg , but every time I start transcoding it broadcasting fro 11 Sec and stop . here last command I triedffmpeg -re -i 'http://source.com/1034.ts' -preset ultrafast http://localhost:2052/feed1.ffmI tried to download the .ts file with IDM and it finish downloading the file on the exact 12 Sec that FFmpeg stop trans coding on it .
does that means that FFmpeg download that file as one segment and not continued reading the source video As what video players does usually . BTW I tried with source with VLC player and it didn’t stop playing the the same source video .
Edit :- I decide to pass FFmpeg command via FFserver config file
ffserver.confLaunch ffmpeg -i 'http://source.com/1.ts' -copyinkf -codec copyThe stream works fine for a while but after testing couple sources I notice it’s struggle to trans-coding HD videos .
I guess the issue with my VPS KVM server being very limited CPU and RAM ( 128MB only ) ! Since I tried using
ultrafastpreset but din’t solve the issue , another thing , I notice when I enableAVOptionVideo crfsetting onffserver.conftrans-coding runs bit smoothly without frame-rate dropping .
Las my server usesXeon L5520CPU which is outdated CPU specially I gout 1/4 power of V single core (if they count HT it will be 1/8 of the real core ) :(Edit 2 :-
# vlc -I dummy 'https://source.com/1034.ts' --sout '#standard{access=http,mux=flv,dst=localhost:2052}'
VLC media player 2.2.8 Weatherwax (revision 2.2.7-14-g3cc1d8cba9)
[09d3fdf0] pulse audio output error: PulseAudio server connection failure: Connection refused
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "globalhotkeys,none" initialization failed
[09d279c0] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "dbus,none" initialization failed
[09d279c0] dummy interface: using the dummy interface module...
[b5e04ae0] access_output_http access out: Consider passing --http-host=IP on the command line instead.
[b5e38ab8] ts demux: MPEG-4 descriptor not found for pid 0x101 type 0xf
[b5e90ae0] packetizer_mpeg4audio decoder: AAC channels: 2 samplerate: 48000
[flv @ 0xb5e33b40] dimensions not set
[b5e06360] avformat mux error: could not write header: Invalid argument
[b5e88ef0] core decoder error: cannot continue streaming due to errors
[b5e90ae0] core decoder error: cannot continue streaming due to errorsHere output with
-loglevel verbose:~# ffmpeg -i http://source.com/1.ts -copyinkf -codec copy -loglevel verbose http://127.0.0.1:8090/feed1.ffm
ffmpeg version 2.6.9 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/i386-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/i386-linux-gnu
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Invalid UE golomb code
Last message repeated 2 times
Input #0, mpegts, from 'http://source.com/1.ts':
Duration: N/A, start: 30472.768167, bitrate: N/A
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 960x540 (960x544) [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 105 kb/s
[graph 0 input from stream 0:1 @ 0x971f2c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[audio format for output stream 0:0 @ 0x9844de0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
[auto-inserted resampler 0 @ 0x97115e0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:1 chl:mono fmt:fltp r:22050Hz
[graph 1 input from stream 0:0 @ 0x96f5d00] w:960 h:540 pixfmt:yuv420p tb:1/90000 fr:50/1 sar:1/1 sws_param:flags=2
[scaler for output stream 0:1 @ 0x96f5e80] w:352 h:240 flags:'0x4' interl:0
[scaler for output stream 0:1 @ 0x96f5e80] w:960 h:540 fmt:yuv420p sar:1/1 -> w:352 h:240 fmt:yuv420p sar:40/33 flags:0x4
Output #0, ffm, to 'http://127.0.0.1:8090/feed1.ffm':
Metadata:
creation_time : now
encoder : Lavf56.25.101
Stream #0:0: Audio: wmav2, 22050 Hz, mono, fltp, 64 kb/s
Metadata:
encoder : Lavc56.26.100 wmav2
Stream #0:1: Video: msmpeg4v3 (msmpeg4), yuv420p, 352x240 [SAR 40:33 DAR 16:9], q=2-31, 256 kb/s, 50 fps, 1000k tbn, 15 tbc
Metadata:
encoder : Lavc56.26.100 msmpeg4
Stream mapping:
Stream #0:1 -> #0:0 (aac (native) -> wmav2 (native))
Stream #0:0 -> #0:1 (h264 (native) -> msmpeg4v3 (msmpeg4))
Press [q] to stop, [?] for help
Invalid UE golomb code
*** dropping frame 3 from stream 1 at ts 1
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 4 from stream 1 at ts 2
Last message repeated 1 times
*** dropping frame 5 from stream 1 at ts 3
Last message repeated 1 times
*** dropping frame 5 from stream 1 at ts 4
*** dropping frame 6 from stream 1 at ts 4
Last message repeated 1 times
*** dropping frame 7 from stream 1 at ts 5
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 8 from stream 1 at ts 6
Last message repeated 1 times
*** dropping frame 8 from stream 1 at ts 7
*** dropping frame 9 from stream 1 at ts 7
Last message repeated 1 times
*** dropping frame 10 from stream 1 at ts 8
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 9
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 10
*** dropping frame 12 from stream 1 at ts 10
Last message repeated 1 times
*** dropping frame 13 from stream 1 at ts 11
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 12
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 13
*** dropping frame 15 from stream 1 at ts 13
Last message repeated 1 times
*** dropping frame 16 from stream 1 at ts 14
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 15
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 16
*** dropping frame 18 from stream 1 at ts 16
Last message repeated 1 times
*** dropping frame 19 from stream 1 at ts 17
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 18me=00:00:01.33 bitrate= 270.3kbits/s dup=0 drop=39
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 19
*** dropping frame 21 from stream 1 at ts 19
Last message repeated 1 times
*** dropping frame 22 from stream 1 at ts 20
Last message repeated 1 times
*** dropping frame 23 from stream 1 at ts 21
Last message repeated 1 times
*** dropping frame 23 from stream 1 at ts 22
*** dropping frame 24 from stream 1 at ts 22
Last message repeated 1 times
*** dropping frame 25 from stream 1 at ts 23
Last message repeated 1 times
*** dropping frame 26 from stream 1 at ts 24
Last message repeated 1 times
*** dropping frame 26 from stream 1 at ts 25
*** dropping frame 27 from stream 1 at ts 25
Last message repeated 1 times
*** dropping frame 28 from stream 1 at ts 26
Last message repeated 1 times
*** dropping frame 29 from stream 1 at ts 27
Last message repeated 1 times
*** dropping frame 29 from stream 1 at ts 28
*** dropping frame 30 from stream 1 at ts 28
Last message repeated 1 times
*** dropping frame 31 from stream 1 at ts 29
Last message repeated 1 times
*** dropping frame 32 from stream 1 at ts 30
Last message repeated 1 times
*** dropping frame 32 from stream 1 at ts 31
*** dropping frame 33 from stream 1 at ts 31
Last message repeated 1 times
*** dropping frame 34 from stream 1 at ts 32
Last message repeated 1 times
*** dropping frame 34 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 34
*** dropping frame 36 from stream 1 at ts 34
Last message repeated 1 times
*** dropping frame 37 from stream 1 at ts 35
Last message repeated 1 times
Invalid UE golomb code
*** dropping frame 38 from stream 1 at ts 36
Last message repeated 1 times
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*** dropping frame 41 from stream 1 at ts 39me=00:00:02.73 bitrate= 311.7kbits/s dup=0 drop=88
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[h264 @ 0x9844a00] error while decoding MB 58 12, bytestream -5
[h264 @ 0x9844a00] concealing 1311 DC, 1311 AC, 1311 MV errors in B frame
*** dropping frame 53 from stream 1 at ts 52
No more output streams to write to, finishing.
frame= 55 fps= 42 q=4.3 Lsize= 152kB time=00:00:03.66 bitrate= 339.6kbits/s dup=0 drop=119
video:116kB audio:26kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.760316%
Input file #0 (http://source.com/1.ts):
Input stream #0:0 (video): 174 packets read (220322 bytes); 174 frames decoded;
Input stream #0:1 (audio): 156 packets read (36657 bytes); 156 frames decoded (159744 samples);
Total: 330 packets (256979 bytes) demuxed
Output file #0 (http://127.0.0.1:8090/feed1.ffm):
Output stream #0:0 (audio): 72 frames encoded (73383 samples); 72 packets muxed (26712 bytes);
Output stream #0:1 (video): 55 frames encoded; 55 packets muxed (119080 bytes);
Total: 127 packets (145792 bytes) muxedHere input url file info After i download it to my PC with IDM
General
ID : 1 (0x1)
Complete name : D:\1.ts
Format : MPEG-TS
File size : 256 KiB
Duration : 2 s 520 ms
Overall bit rate mode : Variable
Overall bit rate : 788 kb/s
Video
ID : 256 (0x100)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Codec ID : 27
Duration : 2 s 680 ms
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Audio
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Muxing mode : ADTS
Codec ID : 15
Duration : 2 s 69 ms
Bit rate mode : Variable
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -12 ms
Menu
ID : 4096 (0x1000)
Menu ID : 1 (0x1)
Duration : 2 s 520 ms
List : 256 (0x100) (AVC) / 257 (0x101) (AAC)
Service name : Service01
Service provider : FFmpeg
Service type : digital television -
Sequencing MIDI From A Chiptune
28 avril 2013, par Multimedia Mike — Outlandish BrainstormsThe feature requests for my game music appreciation website project continue to pour in. Many of them take the form of “please add player support for system XYZ and the chiptune library to go with it.” Most of these requests are A) plausible, and B) in process. I have also received recommendations for UI improvements which I take under consideration. Then there are the numerous requests to port everything from Native Client to JavaScript so that it will work everywhere, even on mobile, a notion which might take a separate post to debunk entirely.
But here’s an interesting request about which I would like to speculate : Automatically convert a chiptune into a MIDI file. I immediately wanted to dismiss it as impossible or highly implausible. But, as is my habit, I started pondering the concept a little more carefully and decided that there’s an outside chance of getting some part of the idea to work.
Intro to MIDI
MIDI stands for Musical Instrument Digital Interface. It’s a standard musical interchange format and allows music instruments and computers to exchange musical information. The file interchange format bears the extension .mid and contains a sequence of numbers that translate into commands separated by time deltas. E.g. : turn key on (this note, this velocity) ; wait x ticks ; turn key off ; wait y ticks ; etc. I’m vastly oversimplifying, as usual.MIDI fascinated me back in the days of dialup internet and discrete sound cards (see also my write-up on the Gravis Ultrasound). Typical song-length MIDI files often ranged from a few kilobytes to a few 10s of kilobytes. They were significantly smaller than the MOD et al. family of tracker music formats mostly by virtue of the fact that MIDI files aren’t burdened by transporting digital audio samples.
I know I’m missing a lot of details. I haven’t dealt much with MIDI in the past… 15 years or so (ever since computer audio became a blur of MP3 and AAC audio). But I’m led to believe it’s still relevant. The individual who requested this feature expressed an interest in being able to import the sequenced data into any of the many music programs that can interpret .mid files.The Pitch
To limit the scope, let’s focus on music that comes from the 8-bit Nintendo Entertainment System or the original Game Boy. The former features 2 square wave channels, a triangle wave, a noise channel, and a limited digital channel. The latter creates music via 2 square waves, a wave channel, and a noise channel. The roles that these various channels usually play typically break down as : square waves represent the primary melody, triangle wave is used to simulate a bass line, noise channel approximates a variety of percussive sounds, and the DPCM/wave channels are fairly free-form. They can have random game sound effects or, if they are to assist in the music, are often used for more authentic percussive sounds.The various channels are controlled via an assortment of memory-mapped hardware registers. These registers are fed values such as frequency, volume, and duty cycle. My idea is to modify the music playback engine to track when various events occur. Whenever a channel is turned on or off, that corresponds to a MIDI key on or off event. If a channel is already playing but a new frequency is written, that would likely count as a note change, so log a key off event followed by a new key on event.
There is the major obstacle of what specific note is represented by a channel in a particular state. The MIDI standard defines 128 different notes spanning 11 octaves. Empirically, I wonder if I could create a table which maps the assorted frequencies to different MIDI notes ?
I think this strategy would only work with the square and triangle waves. Noise and digital channels ? I’m not prepared to tackle that challenge.
Prior Work ?
I have to wonder if there is any existing work in this area. I’m certain that people have wanted to do this before ; I wonder if anyone has succeeded ?Just like reverse engineering a binary program entails trying to obtain a higher level abstraction of a program from a very low level representation, this challenge feels like reverse engineering a piece of music as it is being performed and automatically expressing it in a higher level form.
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