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Médias (91)

Géodiversité

9 septembre 2011, par bruno, kent1

Mis à jour : Août 2018

Langue : français

Type : Texte

1 commentaire

Tags : kml, géodiversité, carte

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USGS Real-time Earthquakes

8 septembre 2011, par kent1

Mis à jour : Septembre 2011

Langue : français

Type : Texte

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SWFUpload Process

6 septembre 2011, par bruno

Mis à jour : Septembre 2011

Langue : français

Type : Texte

Tags : swfupload

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La conservation du net art au musée. Les stratégies à l’œuvre

26 mai 2011

Mis à jour : Juillet 2013

Langue : français

Type : Texte

Tags : thèse, net art, musée

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Podcasting Legal guide

16 mai 2011, par kent1

Mis à jour : Mai 2011

Langue : English

Type : Texte

Tags : pdf, creative commons, doc2img

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Creativecommons informational flyer

16 mai 2011, par kent1

Mis à jour : Juillet 2013

Langue : English

Type : Texte

Tags : pdf, creative commons

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FFmpeg adding 0.05 seconds of silence to transcoded AAC file ?

29 octobre 2015, par FTLRalph

In Java, I’m using FFmpeg to convert a WAV file to AAC with the function :

-i input.wav -ac 1 -ab 64000 -ar 22050 output.aac

When I open these two files in Audacity, I can clearly see that the AAC file is 0.05 seconds longer, with 0.05 seconds of silence added to the beginning.

This is an issue when I try to mux this AAC file with a video file - the audio doesn’t sync up.

Is there some sort of parameter to prevent this behavior or another way to get around this issue ?

Edit - Console output while running the function :

10-28 17:47:10.845: I/System.out(14784): FFmpeg: Running the function: -i "input.wav" -ac 1 -ab 64000 -ar 22050 "output.aac"

10-28 17:47:10.845: I/System.out(14784): FFmpeg function: onStart()

10-28 17:47:10.865: D/FFmpeg(14784): Running publishing updates method

10-28 17:47:10.865: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784): ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavutil      54.  7.100 / 54.  7.100

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavcodec     56.  1.100 / 56.  1.100

10-28 17:47:10.875: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.875: I/System.out(14784):   libavformat    56.  4.101 / 56.  4.101

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libavdevice    56.  0.100 / 56.  0.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libavfilter     5.  1.100 /  5.  1.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libswscale      3.  0.100 /  3.  0.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libswresample   1.  1.100 /  1.  1.100

10-28 17:47:10.880: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.880: I/System.out(14784):   libpostproc    53.  0.100 / 53.  0.100

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.895: I/System.out(14784): Guessed Channel Layout for  Input Stream #0.0 : mono

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.895: I/System.out(14784): Input #0, wav, from 'input.wav':

10-28 17:47:10.895: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.900: I/System.out(14784):   Duration: 00:00:02.50, bitrate: 352 kb/s

10-28 17:47:10.900: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.900: I/System.out(14784):     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784): Output #0, adts, to 'output.aac':

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):   Metadata:

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     encoder         : Lavf56.4.101

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     Stream #0:0: Audio: aac, 22050 Hz, mono, fltp, 64 kb/s

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):     Metadata:

10-28 17:47:10.935: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.935: I/System.out(14784):       encoder         : Lavc56.1.100 aac

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784): Stream mapping:

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784):   Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))

10-28 17:47:10.940: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:10.940: I/System.out(14784): Press [q] to stop, [?] for help

10-28 17:47:11.395: D/dalvikvm(14784): JIT unchain all for threadid=16

10-28 17:47:11.420: D/dalvikvm(14784): GC_FOR_ALLOC freed 4698K, 40% free 7190K/11964K, paused 271ms, total 272ms

10-28 17:47:11.420: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:11.420: I/System.out(14784): size=      12kB time=00:00:02.50 bitrate=  37.7kbits/s    

10-28 17:47:11.455: I/System.out(14784): FFmpeg function: onProgress()...

10-28 17:47:11.455: I/System.out(14784): video:0kB audio:11kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.363914%

10-28 17:47:11.470: I/System.out(14784): FFmpeg function: onSuccess(), message:

10-28 17:47:11.470: I/System.out(14784): ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers

10-28 17:47:11.470: I/System.out(14784):   built on Oct  7 2014 15:08:46 with gcc 4.8 (GCC)

10-28 17:47:11.470: I/System.out(14784):   configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=

10-28 17:47:11.470: I/System.out(14784):   libavutil      54.  7.100 / 54.  7.100

10-28 17:47:11.470: I/System.out(14784):   libavcodec     56.  1.100 / 56.  1.100

10-28 17:47:11.470: I/System.out(14784):   libavformat    56.  4.101 / 56.  4.101

10-28 17:47:11.470: I/System.out(14784):   libavdevice    56.  0.100 / 56.  0.100

10-28 17:47:11.470: I/System.out(14784):   libavfilter     5.  1.100 /  5.  1.100

10-28 17:47:11.470: I/System.out(14784):   libswscale      3.  0.100 /  3.  0.100

10-28 17:47:11.470: I/System.out(14784):   libswresample   1.  1.100 /  1.  1.100

10-28 17:47:11.470: I/System.out(14784):   libpostproc    53.  0.100 / 53.  0.100

10-28 17:47:11.470: I/System.out(14784): Guessed Channel Layout for  Input Stream #0.0 : mono

10-28 17:47:11.470: I/System.out(14784): Input #0, wav, from 'input.wav':

10-28 17:47:11.470: I/System.out(14784):   Duration: 00:00:02.50, bitrate: 352 kb/s

10-28 17:47:11.475: I/System.out(14784):     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s

10-28 17:47:11.475: I/System.out(14784): Output #0, adts, to 'output.aac':

10-28 17:47:11.475: I/System.out(14784):   Metadata:

10-28 17:47:11.475: I/System.out(14784):     encoder         : Lavf56.4.101

10-28 17:47:11.475: I/System.out(14784):     Stream #0:0: Audio: aac, 22050 Hz, mono, fltp, 64 kb/s

10-28 17:47:11.475: I/System.out(14784):     Metadata:

10-28 17:47:11.475: I/System.out(14784):       encoder         : Lavc56.1.100 aac

10-28 17:47:11.475: I/System.out(14784): Stream mapping:

10-28 17:47:11.475: I/System.out(14784):   Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))

10-28 17:47:11.475: I/System.out(14784): Press [q] to stop, [?] for help

10-28 17:47:11.475: I/System.out(14784): size=      12kB time=00:00:02.50 bitrate=  37.7kbits/s    

10-28 17:47:11.475: I/System.out(14784): video:0kB audio:11kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.363914%

10-28 17:47:11.475: I/System.out(14784): FFmpeg function: onFinish()

ffmpeg-mp4box-mpeg dash plays only few segments

30 octobre 2015, par Idris

Need help in debugging the segment dash files

The input was an MP4 with these details. This was recorded from a video camera, the output from the camera was mkv and we converted into MP4 after editing the audio via adobe

Size : 7.51 GB Frame rate : 25 frames/ second
Data rate : 25326kbps
Total bitrate : 25525kbps

Converted this to another mp4 with this command

ffmpeg -i "input.mp4" -s 1280x720 -c:v libx264 -b:v 750k -bf 2 -g 75 -sc_threshold 0 -an video_1280x720_750k.mp4



ffmpeg -i "input.mp4"  -c:a aac -strict experimental -b:a 96k -ar 32000 -vn audio_96k.mp4

The output video has

fps : 25
Data rate : 761kbps
bitrate : 761kbps

Then, created the segmented dash through MP4Box

MP4Box -dash 10000 -frag 10000 -rap -segment-name video_0_1280000\segment_ video_1280x720_750k.mp4



MP4Box -dash 3000 -frag 10000 -rap -segment-name audio_0_96000\segment_ audio_96k.mp4

The MPD generated was validated online and its perfect

UPDATE ! Included the MPD file

&lt;?xml version="1.0"?>



<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H2M0.000S" maxsegmentduration="PT0H0M10.000S" profiles="urn:mpeg:dash:profile:full:2011">

 <programinformation moreinformationurl="http://gpac.sourceforge.net">

  

 </programinformation>



 <period duration="PT0H2M0.000S">

   <adaptationset segmentalignment="true" lang="eng">

     <representation mimetype="audio/mp4" codecs="mp4a.40.2" audiosamplingrate="32000" startwithsap="1" bandwidth="98434">

       <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>

       <segmentlist timescale="32000" duration="319999">

         <initialization sourceurl="audio_0_96000/segment_init.mp4"></initialization>

         <segmenturl media="audio_0_96000/segment_1.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_2.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_3.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_4.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_5.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_6.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_7.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_8.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_9.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_10.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_11.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_12.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_13.m4s"></segmenturl>

       </segmentlist>

     </representation>

   </adaptationset>

  <adaptationset segmentalignment="true" maxwidth="1280" maxheight="720" maxframerate="25" par="16:9" lang="eng">

   <representation mimetype="video/mp4" codecs="avc3.64001f" width="1280" height="720" framerate="25" sar="1:1" startwithsap="1" bandwidth="764668">

    <segmentlist timescale="12800" duration="125866">

     <initialization sourceurl="video_0_1280000/segment_init.mp4"></initialization>

     <segmenturl media="video_0_1280000/segment_1.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_2.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_3.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_4.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_5.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_6.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_7.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_8.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_9.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_10.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_11.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_12.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_13.m4s"></segmenturl>

    </segmentlist>

   </representation>

  </adaptationset>



 </period>

</mpd>

Played the video through dashjs.. I believe it just plays the initial segment and errors out as MEDIA_ERR_DECODE..MEDIA_ERR_SRC_NOT_SUPPORTED.. or some message which says start not found..

Through chrome debugging I see that atleast 4 segments are correctly loading.. I am not sure whats going on..

Any help in debugging the issue is really appreciated. I really can’t understand if this is a problem with the file or ffmpeg or mp4box or chrome.

Output from chrome debugging tool

[dash.js 1.5.1] new MediaPlayer instance has been created 

dash.all.js:11 Playback initiated! 

dash.all.js:11 Parsing complete: ( xml2json: 5ms, objectiron: 10ms, total: 0.015s) 

dash.all.js:11 Manifest has been refreshed at Mon Oct 26 2015 10:19:22 GMT-0400 (Eastern Daylight Time)[1445869162092]  

dash.all.js:11 SegmentTimeline detected using calculated Live Edge Time 

dash.all.js:11 MediaSource is open! 

dash.all.js:11 [object Event] 

dash.all.js:11 Duration successfully set to: 120 

dash.all.js:11 Added 0 inline events 

dash.all.js:11 video codec: video/mp4;codecs="avc3.64001f" 

dash.all.js:11 [video] stop 

dash.all.js:11 audio codec: audio/mp4;codecs="mp4a.40.2" 

dash.all.js:11 [audio] stop 

dash.all.js:11 No text data. 

dash.all.js:11 No fragmentedText data. 

dash.all.js:11 No muxed data. 

dash.all.js:11 [video] start 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [audio] start 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 [audio] SegmentList: 0 / 120 

dash.all.js:11 [video] Getting the request for time: 9.83328125 

dash.all.js:11 [video] Index for time 9.83328125 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [audio] Getting the request for time: 9.99996875 

dash.all.js:11 [audio] Index for time 9.99996875 is 0 

dash.all.js:11 [audio] SegmentList: 0 / 120 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 loaded audio:Media Segment:0 (200, 20ms, 6ms) 

dash.all.js:11 loaded video:Media Segment:0 (200, 153ms, 43ms) 

dash.all.js:11 loaded video:Initialization Segment:NaN (200, 0ms, 32ms) 

dash.all.js:11 [video] Initialization finished loading 

dash.all.js:11 loaded audio:Initialization Segment:NaN (200, 0ms, 34ms) 

dash.all.js:11 [audio] Initialization finished loading 

dash.all.js:11 [video] Getting the request for time: 19.6665625 

dash.all.js:11 [video] Index for time 19.6665625 is 1 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [audio] Getting the request for time: 19.9999375 

dash.all.js:11 [audio] Index for time 19.9999375 is 1 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [video] Stalling Buffer 

dash.all.js:11 [video] Waiting for more buffer before starting playback. 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [audio] Stalling Buffer 

dash.all.js:11 [audio] Waiting for more buffer before starting playback. 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 <video> loadedmetadata 

dash.all.js:11 Starting playback at offset: 0 

dash.all.js:11 [video] Getting the request for time: 29.499843750000004 

dash.all.js:11 [video] Index for time 29.499843750000004 is 2 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] Got enough buffer to start. 

dash.all.js:11 [video] seek: 0 

dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 

dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 

dash.all.js:11 [audio] Got enough buffer to start. 

dash.all.js:11 [audio] seek: 0 

dash.all.js:11 loaded audio:Media Segment:9.99996875 (200, 67ms, 24ms) 

dash.all.js:11 loaded video:Media Segment:9.83328125 (200, 71ms, 31ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 9.984 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 Start Event Controller 

dash.all.js:11 [audio] Buffered Range: 0.032 - 19.999968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 <video> play 

dash.all.js:11 [video] start 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [audio] start 

dash.all.js:11 <video> playing 

dash.all.js:11 [video] Buffered Range: 0 - 9 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 Do seek: 0.032 

dash.all.js:11 <video> seek 

dash.all.js:11 [video] Getting the request for time: 29.499843750000004 

dash.all.js:11 [video] Index for time 29.499843750000004 is 2 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] seek: 0.032 

dash.all.js:11 [audio] seek: 0.032 

dash.all.js:11 [video] Getting the request for time: 9 

dash.all.js:11 [video] Index for time 9 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] Buffered Range: 0 - 18 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 loaded video:Media Segment:19.6665625 (200, 42ms, 33ms) 

dash.all.js:11 <video> seeked 

dash.all.js:11 Start Event Controller 

dash.all.js:11 <video> playing 

dash.all.js:11 [video] Buffered Range: 0 - 28 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [audio] Getting the request for time: 19.999968 

dash.all.js:11 [audio] Index for time 19.999968 is 1 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 

dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 

dash.all.js:11 loaded audio:Media Segment:19.9999375 (200, 102ms, 2ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 29.983968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 loaded audio:Media Segment:29.999906250000002 (200, 26ms, 2ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 39.999968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 loaded video:Media Segment:29.499843750000004 (200, 47ms, 7ms) 

dash.all.js:11 Video Element Error: MEDIA_ERR_DECODE 

dash.all.js:11 [video] stop 

dash.all.js:11 [audio] stop 

dash.all.js:11 Video Element Error: MEDIA_ERR_SRC_NOT_SUPPORTED 

dash.all.js:11 <video> play 

</video></video></video></video></video></video></video>

ffmpeg-mp4box-mpeg dash plays only few segments

30 octobre 2015, par Idris

Need help in debugging the segment dash files

The input was an MP4 with these details. This was recorded from a video camera, the output from the camera was mkv and we converted into MP4 after editing the audio via adobe

Size : 7.51 GB Frame rate : 25 frames/ second
Data rate : 25326kbps
Total bitrate : 25525kbps

Converted this to another mp4 with this command

ffmpeg -i "input.mp4" -s 1280x720 -c:v libx264 -b:v 750k -bf 2 -g 75 -sc_threshold 0 -an video_1280x720_750k.mp4



ffmpeg -i "input.mp4"  -c:a aac -strict experimental -b:a 96k -ar 32000 -vn audio_96k.mp4

The output video has

fps : 25
Data rate : 761kbps
bitrate : 761kbps

Then, created the segmented dash through MP4Box

MP4Box -dash 10000 -frag 10000 -rap -segment-name video_0_1280000\segment_ video_1280x720_750k.mp4



MP4Box -dash 3000 -frag 10000 -rap -segment-name audio_0_96000\segment_ audio_96k.mp4

The MPD generated was validated online and its perfect

UPDATE ! Included the MPD file

&lt;?xml version="1.0"?>



<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H2M0.000S" maxsegmentduration="PT0H0M10.000S" profiles="urn:mpeg:dash:profile:full:2011">

 <programinformation moreinformationurl="http://gpac.sourceforge.net">

  

 </programinformation>



 <period duration="PT0H2M0.000S">

   <adaptationset segmentalignment="true" lang="eng">

     <representation mimetype="audio/mp4" codecs="mp4a.40.2" audiosamplingrate="32000" startwithsap="1" bandwidth="98434">

       <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>

       <segmentlist timescale="32000" duration="319999">

         <initialization sourceurl="audio_0_96000/segment_init.mp4"></initialization>

         <segmenturl media="audio_0_96000/segment_1.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_2.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_3.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_4.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_5.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_6.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_7.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_8.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_9.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_10.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_11.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_12.m4s"></segmenturl>

         <segmenturl media="audio_0_96000/segment_13.m4s"></segmenturl>

       </segmentlist>

     </representation>

   </adaptationset>

  <adaptationset segmentalignment="true" maxwidth="1280" maxheight="720" maxframerate="25" par="16:9" lang="eng">

   <representation mimetype="video/mp4" codecs="avc3.64001f" width="1280" height="720" framerate="25" sar="1:1" startwithsap="1" bandwidth="764668">

    <segmentlist timescale="12800" duration="125866">

     <initialization sourceurl="video_0_1280000/segment_init.mp4"></initialization>

     <segmenturl media="video_0_1280000/segment_1.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_2.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_3.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_4.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_5.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_6.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_7.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_8.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_9.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_10.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_11.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_12.m4s"></segmenturl>

     <segmenturl media="video_0_1280000/segment_13.m4s"></segmenturl>

    </segmentlist>

   </representation>

  </adaptationset>



 </period>

</mpd>

Played the video through dashjs.. I believe it just plays the initial segment and errors out as MEDIA_ERR_DECODE..MEDIA_ERR_SRC_NOT_SUPPORTED.. or some message which says start not found..

Through chrome debugging I see that atleast 4 segments are correctly loading.. I am not sure whats going on..

Any help in debugging the issue is really appreciated. I really can’t understand if this is a problem with the file or ffmpeg or mp4box or chrome.

Output from chrome debugging tool

[dash.js 1.5.1] new MediaPlayer instance has been created 

dash.all.js:11 Playback initiated! 

dash.all.js:11 Parsing complete: ( xml2json: 5ms, objectiron: 10ms, total: 0.015s) 

dash.all.js:11 Manifest has been refreshed at Mon Oct 26 2015 10:19:22 GMT-0400 (Eastern Daylight Time)[1445869162092]  

dash.all.js:11 SegmentTimeline detected using calculated Live Edge Time 

dash.all.js:11 MediaSource is open! 

dash.all.js:11 [object Event] 

dash.all.js:11 Duration successfully set to: 120 

dash.all.js:11 Added 0 inline events 

dash.all.js:11 video codec: video/mp4;codecs="avc3.64001f" 

dash.all.js:11 [video] stop 

dash.all.js:11 audio codec: audio/mp4;codecs="mp4a.40.2" 

dash.all.js:11 [audio] stop 

dash.all.js:11 No text data. 

dash.all.js:11 No fragmentedText data. 

dash.all.js:11 No muxed data. 

dash.all.js:11 [video] start 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [audio] start 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 [audio] SegmentList: 0 / 120 

dash.all.js:11 [video] Getting the request for time: 9.83328125 

dash.all.js:11 [video] Index for time 9.83328125 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [audio] Getting the request for time: 9.99996875 

dash.all.js:11 [audio] Index for time 9.99996875 is 0 

dash.all.js:11 [audio] SegmentList: 0 / 120 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 loaded audio:Media Segment:0 (200, 20ms, 6ms) 

dash.all.js:11 loaded video:Media Segment:0 (200, 153ms, 43ms) 

dash.all.js:11 loaded video:Initialization Segment:NaN (200, 0ms, 32ms) 

dash.all.js:11 [video] Initialization finished loading 

dash.all.js:11 loaded audio:Initialization Segment:NaN (200, 0ms, 34ms) 

dash.all.js:11 [audio] Initialization finished loading 

dash.all.js:11 [video] Getting the request for time: 19.6665625 

dash.all.js:11 [video] Index for time 19.6665625 is 1 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [audio] Getting the request for time: 19.9999375 

dash.all.js:11 [audio] Index for time 19.9999375 is 1 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [video] Stalling Buffer 

dash.all.js:11 [video] Waiting for more buffer before starting playback. 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [audio] Stalling Buffer 

dash.all.js:11 [audio] Waiting for more buffer before starting playback. 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 <video> loadedmetadata 

dash.all.js:11 Starting playback at offset: 0 

dash.all.js:11 [video] Getting the request for time: 29.499843750000004 

dash.all.js:11 [video] Index for time 29.499843750000004 is 2 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] Got enough buffer to start. 

dash.all.js:11 [video] seek: 0 

dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 

dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 

dash.all.js:11 [audio] Got enough buffer to start. 

dash.all.js:11 [audio] seek: 0 

dash.all.js:11 loaded audio:Media Segment:9.99996875 (200, 67ms, 24ms) 

dash.all.js:11 loaded video:Media Segment:9.83328125 (200, 71ms, 31ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 9.984 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 Start Event Controller 

dash.all.js:11 [audio] Buffered Range: 0.032 - 19.999968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 <video> play 

dash.all.js:11 [video] start 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [audio] start 

dash.all.js:11 <video> playing 

dash.all.js:11 [video] Buffered Range: 0 - 9 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 Do seek: 0.032 

dash.all.js:11 <video> seek 

dash.all.js:11 [video] Getting the request for time: 29.499843750000004 

dash.all.js:11 [video] Index for time 29.499843750000004 is 2 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] seek: 0.032 

dash.all.js:11 [audio] seek: 0.032 

dash.all.js:11 [video] Getting the request for time: 9 

dash.all.js:11 [video] Index for time 9 is 0 

dash.all.js:11 [video] SegmentList: 0 / 120 

dash.all.js:11 [video] SegmentList: 9.83328125 / 120 

dash.all.js:11 [video] SegmentList: 19.6665625 / 120 

dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 

dash.all.js:11 [video] Buffered Range: 0 - 18 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 loaded video:Media Segment:19.6665625 (200, 42ms, 33ms) 

dash.all.js:11 <video> seeked 

dash.all.js:11 Start Event Controller 

dash.all.js:11 <video> playing 

dash.all.js:11 [video] Buffered Range: 0 - 28 

dash.all.js:11 [video] Getting the request for time: 0 

dash.all.js:11 [video] Index for time 0 is 0 

dash.all.js:11 [audio] Getting the request for time: 19.999968 

dash.all.js:11 [audio] Index for time 19.999968 is 1 

dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 

dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 

dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 

dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 

dash.all.js:11 loaded audio:Media Segment:19.9999375 (200, 102ms, 2ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 29.983968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 loaded audio:Media Segment:29.999906250000002 (200, 26ms, 2ms) 

dash.all.js:11 [audio] Buffered Range: 0.032 - 39.999968 

dash.all.js:11 [audio] Getting the request for time: 0 

dash.all.js:11 [audio] Index for time 0 is 0 

dash.all.js:11 loaded video:Media Segment:29.499843750000004 (200, 47ms, 7ms) 

dash.all.js:11 Video Element Error: MEDIA_ERR_DECODE 

dash.all.js:11 [video] stop 

dash.all.js:11 [audio] stop 

dash.all.js:11 Video Element Error: MEDIA_ERR_SRC_NOT_SUPPORTED 

dash.all.js:11 <video> play 

</video></video></video></video></video></video></video>

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