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HTML5 audio and video support
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FFMPEG : How to manually select video quality from mpd manifest ?
18 juin 2022, par DeoxysI want to ask what command should I use to select video quality from mpd manifest ?



mpd manifest link



https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6.mpd



Here, the mpd file :



<?xml version="1.0" encoding="utf-8"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT7M59.240000S" minbuffertime="PT0S" maxsegmentduration="PT4S">
 <period duration="PT7M59.240000S">
 <adaptationset group="1" mimetype="audio/mp4" lang="en" contenttype="audio" minbandwidth="32000" maxbandwidth="64000">
<contentprotection schemeiduri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"></contentprotection><contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection> <role schemeiduri="urn:mpeg:dash:role:2011" value="main"></role>
 <representation bandwidth="32000" audiosamplingrate="22050" codecs="mp4a.40.2">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
 <segmenttemplate timescale="10000000" initialization="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-init.mp4" media="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-$Time$.mp4">
 <segmenttimeline>
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 </segmenttimeline>
 </segmenttemplate>
 </representation>
 <representation bandwidth="64000" audiosamplingrate="22050" codecs="mp4a.40.2">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
 <segmenttemplate timescale="10000000" initialization="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-init.mp4" media="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-$Time$.mp4">
 <segmenttimeline>
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 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 <adaptationset group="2" framerate="25" mimetype="video/mp4" startwithsap="1" contenttype="video" par="16:9" minbandwidth="150119" maxbandwidth="5002530" minwidth="256" maxwidth="1920" minheight="144" maxheight="1080">
<contentprotection schemeiduri="urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed"></contentprotection><contentprotection schemeiduri="urn:mpeg:dash:mp4protection:2011" value="cenc"></contentprotection> <role schemeiduri="urn:mpeg:dash:role:2011" value="main"></role>
 <segmenttemplate timescale="10000000" initialization="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-init.mp4" media="kiko-season1-eps1-mobil-kabur-anv6-$RepresentationID$-$Time$.mp4">
 <segmenttimeline>
 <s t="0" d="36000000" r="132"></s>
 <s d="4400000"></s>
 </segmenttimeline>
 </segmenttemplate>
 <representation bandwidth="150119" width="256" height="144" codecs="avc1.4d400c"></representation>
 <representation bandwidth="500565" width="640" height="360" codecs="avc1.4d401e"></representation>
 <representation bandwidth="1001193" width="854" height="480" codecs="avc1.4d401e"></representation>
 <representation bandwidth="2502286" width="1280" height="720" codecs="avc1.4d401f"></representation>
 <representation bandwidth="5002530" width="1920" height="1080" codecs="avc1.4d4028"></representation>
 </adaptationset>
 </period>
</mpd>



The video is not encrypted with DRM. When I tried to download with FFmpeg, success, but FFmpeg automatically select the worst quality (144p).



FFmpeg command I use :



ffmpeg -i https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6.mpd -c copy kiko1.mp4



Result from ffmpeg



ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
 configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-avc1_150119=5-init.mp4[/URL]' for reading [dash @ 0x562ae2e98000] Could not read complete fragment.
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-avc1_150119=5-0.mp4[/URL]' for reading
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-mp4a_32000_eng=6-init.mp4[/URL]' for reading [dash @ 0x562ae2e98000] Could not read complete fragment.
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-mp4a_32000_eng=6-0.mp4[/URL]' for reading
[aac @ 0x562ae32ced00] channel element 2.3 is not allocated
[h264 @ 0x562ae32cc500] top block unavailable for requested intra mode -1
[h264 @ 0x562ae32cc500] error while decoding MB 0 0, bytestream 38
[h264 @ 0x562ae32cc500] concealing 144 DC, 144 AC, 144 MV errors in I frame
Input #0, dash, from '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6.mpd[/URL]':
 Duration: 00:07:59.00, start: 0.000000, bitrate: 0 kb/s 
Program 0
 Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 256x144 [SAR 1:1 DAR 16:9], 153 kb/s, 25 fps, 25 tbr, 10000k tbn, 50 tbc 
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 32 kb/s
Output #0, mp4, to 'kiko1.mp4': 
 Metadata: 
 encoder : Lavf57.83.100 
 Stream #0:0: Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 256x144 [SAR 1:1 DAR 16:9], q=2-31, 153 kb/s, 25 fps, 25 tbr, 10000k tbn, 10000k tbc
Stream mapping: 
 Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-mp4a_32000_eng=6-36223129.mp4[/URL]' for reading
[dash @ 0x562ae2e98000] Opening '[URL]https://anevia115(dot)mncnow(dot)id/vod/eds/kiko-season1-eps1-mobil-kabur-anv6/_/sa_dash_vmx/kiko-season1-eps1-mobil-kabur-anv6-avc1_150119=5-36000000.mp4[/URL]' for reading
....
....
frame=11978 fps= 99 q=-1.0 Lsize= 8891kB time=00:07:59.08 bitrate= 152.0kbits/s speed=3.97x
video:8779kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.269990%



Tried youtube-dl & streamlink but failed.
So, I use FFmpeg because it success to download the video and audio. I have read FFmpeg documentation but I have no idea what command should I use.
What command should I use to select another quality ? (ex : audio 64 kbps, video : 720p)





Note : just change (dot) to
.



-
FFMPEG Audio/video out of sync after cutting and concatonating even after transcoding
4 mai 2020, par Ham789I am attempting to take cuts from a set of videos and concatonate them together with the concat demuxer.



However, the audio is out of sync of the video in the output. The audio seems to drift further out of sync as the video progresses. Interestingly, if I click to seek another time in the video with the progress bar on the player, the audio becomes synced up with the video but then gradually drifts out of sync again. Seeking to a new time in the player seems to reset the audio/video. It is like they are being played back at different rates or something. I get this behaviour in both Quicktime and VLC players.



For each video, I decode it, trim a clip from it and then encode it to 4k resolution at 25 fps with its audio :



ffmpeg -ss 0.5 -t 0.5 -i input_video1.mp4 -r 25 -vf scale=3840:2160 output_video1.mp4


I then take each of these videos and concatonate them together with the concat demuxer :



ffmpeg -f concat -safe 0 -i cut_videos.txt -c copy -y output.mp4


I am taking short cuts of each video (approximately 0.5s)



I am using Python's subprocess to automate the cutting and concatonating of the videos.



I am not sure if this happens because of the trimming or concatenation steps but when I play back the intermediate cut video files (
output_video1.mp4in the above command), there seems to be some silence before the audio comes in at the start of the video.


When I concatonate the videos, I sometimes get a lot of these warnings however the audio still becomes out of sync even when I do not get them :



[mp4 @ 0000021a252ce080] Non-monotonous DTS in output stream 0:1; previous: 51792, current: 50009; changing to 51793. This may result in incorrect timestamps in the output file.


From this post, it seems to be a problem with cutting the videos and their timestamps. The solution proposed in the post is to decode, cut and then encode the video however I am already doing that.



How can I ensure the audio and video are in sync ? Am I transcoding incorrectly ? This seems to be the only solution I can find online however it does not seem to work.



UPDATE :



I took inspiration from this post and seperated the audio and video from
output_video1.mp4using :


ffmpeg -i output_video1.mp4 -acodec copy -vn video.mp4


and



ffmpeg -i output_video1.mp4 -vcodec copy -an audio.mp4


I then compared the durations of
video.mp4andaudio.mp4and got 0.57s and 0.52s respectively. Since the video is longer, this explains why there is a period of silence in the videos. The post then suggests transcoding is the solution however as you can see from the code above that does not work for me.


Sample Output Log for the Trim Command



built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input_video1.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf58.29.100
 Duration: 00:00:04.06, start: 0.000000, bitrate: 14266 kb/s
 Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3840x2160, 14268 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
 Metadata:
 handler_name : Core Media Video
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 94 kb/s (default)
 Metadata:
 handler_name : Core Media Audio
File 'output_video1.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
 Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7fcae4001e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fcae4001e00] profile High, level 5.1
[libx264 @ 0x7fcae4001e00] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output_video1.mp4':
 Metadata:
 major_brand : isom
 minor_version : 512
 compatible_brands: isomiso2avc1mp41
 encoder : Lavf58.29.100
 Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 3840x2160, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
 Metadata:
 handler_name : Core Media Video
 encoder : Lavc58.54.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 69 kb/s (default)
 Metadata:
 handler_name : Core Media Audio
 encoder : Lavc58.54.100 aac
frame= 14 fps=7.0 q=-1.0 Lsize= 928kB time=00:00:00.51 bitrate=14884.2kbits/s dup=0 drop=1 speed=0.255x 
video:922kB audio:5kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.194501%
[libx264 @ 0x7fcae4001e00] frame I:1 Avg QP:21.06 size:228519
[libx264 @ 0x7fcae4001e00] frame P:4 Avg QP:22.03 size: 85228
[libx264 @ 0x7fcae4001e00] frame B:9 Avg QP:22.88 size: 41537
[libx264 @ 0x7fcae4001e00] consecutive B-frames: 14.3% 0.0% 0.0% 85.7%
[libx264 @ 0x7fcae4001e00] mb I I16..4: 27.6% 64.3% 8.1%
[libx264 @ 0x7fcae4001e00] mb P I16..4: 9.1% 10.7% 0.2% P16..4: 48.5% 7.3% 3.9% 0.0% 0.0% skip:20.2%
[libx264 @ 0x7fcae4001e00] mb B I16..4: 1.1% 1.0% 0.0% B16..8: 44.5% 2.9% 0.2% direct: 8.3% skip:42.0% L0:45.6% L1:53.2% BI: 1.2%
[libx264 @ 0x7fcae4001e00] 8x8 transform intra:58.2% inter:93.4%
[libx264 @ 0x7fcae4001e00] coded y,uvDC,uvAC intra: 31.4% 62.2% 5.2% inter: 11.4% 30.9% 0.0%
[libx264 @ 0x7fcae4001e00] i16 v,h,dc,p: 15% 52% 12% 21%
[libx264 @ 0x7fcae4001e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 33% 32% 2% 2% 2% 4% 2% 4%
[libx264 @ 0x7fcae4001e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 39% 9% 3% 4% 4% 12% 3% 4%
[libx264 @ 0x7fcae4001e00] i8c dc,h,v,p: 43% 36% 18% 3%
[libx264 @ 0x7fcae4001e00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fcae4001e00] ref P L0: 69.3% 8.0% 14.8% 7.9%
[libx264 @ 0x7fcae4001e00] ref B L0: 88.1% 9.2% 2.6%
[libx264 @ 0x7fcae4001e00] ref B L1: 90.2% 9.8%
[libx264 @ 0x7fcae4001e00] kb/s:13475.29
[aac @ 0x7fcae4012400] Qavg: 125.000```


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How do I properly format a request for ffmpeg to decode using a particular codec ? [migrated]
9 mai 2013, par user2062660r3d is listed as a supported codec for decoding, however when I attempt to specify the r3d decoder, I get the error message "Unknown decoder". What is the correct manner of specifying a decoder codec ?
me$ ffmpeg -c r3d -i one.r3d one.mpg
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on May 8 2013 19:48:08 with Apple clang version 4.0 (tags/Apple/clang-421.0.57) (based on LLVM 3.1svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mp3 @ 0x7fa2e4006600] Format mp3 detected only with low score of 1, misdetection possible!
Unknown decoder 'r3d'
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