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Dash output with ffmpeg not producing durations specified with -seg_duration
30 juillet 2022, par CodieThere is a .mp4 file of 35 MB and 51 seconds. I have to create 51 chunks, each corresponding to 1 second with a size of less than 1MB (the total size should be almost the same as the original file). Please note that I have to implement lossless converting.


I've tried many times, but it just produces about 10 files above 10 MB.



Command :


ffmpeg -re -i input.mp4 -map 0:v -c:v libx264 -crf 0 -bf 1 -keyint_min 120 -g 120 -sc_threshold 0 -b_strategy 0 -use_template 1 -seg_duration 1 -window_size 60 -adaptation_sets "id=0,streams=v id=1,streams=a" -f dash ./dashTest/out.mpd



Command line log :


ffmpeg version 5.1-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 57. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 creation_time : 2022-07-27T09:13:31.000000Z
 Duration: 00:00:50.03, start: 0.000000, bitrate: 5716 kb/s
 Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 5396 kb/s, 25 fps, 25 tbr, 25k tbn (default)
 Metadata:
 creation_time : 2022-07-27T09:13:31.000000Z
 handler_name : ?Mainconcept Video Media Handler
 vendor_id : [0][0][0][0]
 encoder : AVC Coding
 Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
 Metadata:
 creation_time : 2022-07-27T09:13:31.000000Z
 handler_name : #Mainconcept MP4 Sound Media Handler
 vendor_id : [0][0][0][0]
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 000001d13acb0380] using SAR=1/1
[libx264 @ 000001d13acb0380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 000001d13acb0380] profile High 4:4:4 Predictive, level 3.1, 4:2:0, 8-bit
[libx264 @ 000001d13acb0380] 264 - core 164 r3095 baee400 - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=0 mixed_ref=1 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=0 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=2 keyint=120 keyint_min=61 scenecut=0 intra_refresh=0 rc=cqp mbtree=0 qp=0
[dash @ 000001d13a2a4680] No bit rate set for stream 0
[dash @ 000001d13a2a4680] Opening './dashTest/init-stream0.m4s' for writing
Output #0, dash, to './dashTest/out.mpd':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 encoder : Lavf59.27.100
 Stream #0:0(eng): Video: h264, yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn (default)
 Metadata:
 creation_time : 2022-07-27T09:13:31.000000Z
 handler_name : ?Mainconcept Video Media Handler
 vendor_id : [0][0][0][0]
 encoder : Lavc59.37.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00001.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.849x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00002.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.918x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00003.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.942x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00004.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.957x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00005.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.964x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00006.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.971x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00007.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.975x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00008.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.978x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00009.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.981x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00010.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.982x
[dash @ 000001d13a2a4680] Opening './dashTest/chunk-stream0-00011.m4s.tmp' for writing
[dash @ 000001d13a2a4680] Opening './dashTest/out.mpd.tmp' for writing0.983x
frame= 1250 fps= 25 q=-1.0 Lsize=N/A time=00:00:49.96 bitrate=N/A speed=0.992x
video:171641kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 000001d13acb0380] frame I:11 Avg QP: 0.00 size:255122
[libx264 @ 000001d13acb0380] frame P:1239 Avg QP: 0.00 size:139591
[libx264 @ 000001d13acb0380] mb I I16..4: 52.8% 8.8% 38.4%
[libx264 @ 000001d13acb0380] mb P I16..4: 3.9% 0.7% 1.3% P16..4: 28.0% 13.9% 11.3% 0.0% 0.0% skip:40.8%
[libx264 @ 000001d13acb0380] 8x8 transform intra:11.9% inter:33.4%
[libx264 @ 000001d13acb0380] coded y,uvDC,uvAC intra: 68.6% 80.1% 78.9% inter: 38.0% 47.1% 46.5%
[libx264 @ 000001d13acb0380] i16 v,h,dc,p: 65% 28% 5% 2%
[libx264 @ 000001d13acb0380] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 33% 28% 2% 1% 1% 1% 1% 1%
[libx264 @ 000001d13acb0380] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 36% 7% 3% 5% 3% 4% 3% 2%
[libx264 @ 000001d13acb0380] i8c dc,h,v,p: 17% 38% 44% 1%
[libx264 @ 000001d13acb0380] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001d13acb0380] ref P L0: 86.4% 7.6% 4.6% 1.4%
[libx264 @ 000001d13acb0380] kb/s:28121.58



.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="PT50.0S" maxsegmentduration="PT1.0S" minbuffertime="PT9.6S">
 <programinformation>
 </programinformation>
 <servicedescription>
 </servicedescription>
 <period start="PT0.0S">
 <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="25/1" maxwidth="1280" maxheight="720" par="16:9" lang="eng">
 <representation mimetype="video/mp4" codecs="avc1.f4001f" bandwidth="28122926" width="1280" height="720" sar="1:1">
 <segmenttemplate timescale="12800" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="61440" r="9"></s>
 <s d="25600"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true">
 </adaptationset>
 </period>
</mpd>



Please, if you want to put a negative point, mention your reason in the comments !



 -
Undefined reference, using FFMpeg-library (AvCodec) on Ubuntu, 64-bits system
5 mai 2012, par Anders BranderudI am running the example code of the latest FFMpeg-library.
I have inserted the example code into the filevideofecencoder.c:/*
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#include
#include
#include
#ifdef HAVE_AV_CONFIG_H
#undef HAVE_AV_CONFIG_H
#endif
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavcodec/avcodec.h"
#include "libavutil/mathematics.h"
#include "libavutil/samplefmt.h"
#define INBUF_SIZE 4096
#define AUDIO_INBUF_SIZE 20480
#define AUDIO_REFILL_THRESH 4096
/*
* Video encoding example
*/
static void video_encode_example(const char *filename, int codec_id)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size;
FILE *f;
AVFrame *picture;
uint8_t *outbuf;
int nrOfFramesPerSecond =25;
int nrOfSeconds =1;
printf("Video encoding\n");
/* find the mpeg1 video encoder */
codec = avcodec_find_encoder((CodecID) codec_id);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c = avcodec_alloc_context3(codec);
picture= avcodec_alloc_frame();
/* put sample parameters */
c->bit_rate = 400000;
/* resolution must be a multiple of two */
c->width = 352;
c->height = 288;
/* frames per second */
c->time_base= (AVRational){1,25};
c->gop_size = 10; /* emit one intra frame every ten frames */
c->max_b_frames=1;
c->pix_fmt = PIX_FMT_YUV420P;
if(codec_id == CODEC_ID_H264)
av_opt_set(c->priv_data, "preset", "slow", 0);
/* open it */
if (avcodec_open2(c, codec, NULL) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
f = fopen(filename, "wb");
if (!f) {
fprintf(stderr, "could not open %s\n", filename);
exit(1);
}
/* alloc image and output buffer */
outbuf_size = 100000;
outbuf = (uint8_t*) malloc(outbuf_size);
/* the image can be allocated by any means and av_image_alloc() is
* just the most convenient way if av_malloc() is to be used */
av_image_alloc(picture->data, picture->linesize,
c->width, c->height, c->pix_fmt, 1);
/* encode 1 second of video */
int nrOfFramesTotal = nrOfFramesPerSecond * nrOfSeconds;
/* encode 1 second of video */
for(i=0;i < nrOfFramesTotal; i++) {
fflush(stdout);
/* prepare a dummy image */
/* Y */
for(y=0;yheight;y++) {
for(x=0;xwidth;x++) {
picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
}
}
/* Cb and Cr */
for(y=0;yheight/2;y++) {
for(x=0;xwidth/2;x++) {
picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
}
}
/* encode the image */
out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
printf("encoding frame %3d (size=%5d)\n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}
/* get the delayed frames */
for(; out_size; i++) {
fflush(stdout);
out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
printf("write frame %3d (size=%5d)\n", i, out_size);
fwrite(outbuf, 1, out_size, f);
}
/* add sequence end code to have a real mpeg file */
outbuf[0] = 0x00;
outbuf[1] = 0x00;
outbuf[2] = 0x01;
outbuf[3] = 0xb7;
fwrite(outbuf, 1, 4, f);
fclose(f);
free(outbuf);
avcodec_close(c);
av_free(c);
av_free(picture->data[0]);
av_free(picture);
printf("\n");
}
int main(int argc, char **argv)
{
const char *filename;
/* register all the codecs */
avcodec_register_all();
if (argc <= 1) {
video_encode_example("/grb_1.mpg", CODEC_ID_MPEG1VIDEO);
} else {
filename = argv[1];
}
return 0;
}When I run
gcc videofecencoder.cc -lavcodecI get the following error messages :/tmp/ccJg8IDy.o: In function `video_encode_example(char const*, int)':
videofecencoder.cc:(.text+0x35): undefined reference to `avcodec_find_encoder(CodecID)'
videofecencoder.cc:(.text+0x74): undefined reference to `avcodec_alloc_context3(AVCodec*)'
videofecencoder.cc:(.text+0x7d): undefined reference to `avcodec_alloc_frame()'
videofecencoder.cc:(.text+0x113): undefined reference to `av_opt_set(void*, char const*, char const*, int)'
videofecencoder.cc:(.text+0x12b): undefined reference to `avcodec_open2(AVCodecContext*, AVCodec*, AVDictionary**)'
videofecencoder.cc:(.text+0x1f0): undefined reference to `av_image_alloc(unsigned char**, int*, int, int, PixelFormat, int)'
videofecencoder.cc:(.text+0x35c): undefined reference to `avcodec_encode_video(AVCodecContext*, unsigned char*, int, AVFrame const*)'
videofecencoder.cc:(.text+0x3cf): undefined reference to `avcodec_encode_video(AVCodecContext*, unsigned char*, int, AVFrame const*)'
videofecencoder.cc:(.text+0x47c): undefined reference to `avcodec_close(AVCodecContext*)'
videofecencoder.cc:(.text+0x488): undefined reference to `av_free(void*)'
videofecencoder.cc:(.text+0x497): undefined reference to `av_free(void*)'
videofecencoder.cc:(.text+0x4a3): undefined reference to `av_free(void*)'
/tmp/ccJg8IDy.o: In function `main':
videofecencoder.cc:(.text+0x4c3): undefined reference to `avcodec_register_all()'
collect2: ld returnerade avslutningsstatus 1The command
nm libavcodec.a | grep avcodec_findresults in :00000000000008e0 T avcodec_find_best_pix_fmt
0000000000000740 T avcodec_find_best_pix_fmt2
U avcodec_find_encoder
0000000000002ca0 T avcodec_find_decoder
0000000000002cf0 T avcodec_find_decoder_by_name
0000000000002bd0 T avcodec_find_encoder
0000000000002c30 T avcodec_find_encoder_by_nameI also have another similar error with another library :
Undefined reference despite linking in OpenFEC-libraryMy system : Ubuntu 11, 64-bits machine
My next step is to try to compile it on VirtualBox with Ubuntu 32 bits (running on a Windows-OS).
-
Do I need multiple video files in different resolutions to use MPEG DASH ?
2 février 2023, par Gentil AlysonI'm trying to use Django REST Framework to serve .mpd files. When the user uploads a video, the server creates the MPD and the chunk files. However, I can't seem to able to make it work. I've tried using python-ffmpeg-video-streaming, but the client which is using dash.js to play the video will get only one bitrate (480p). I've also tried running this command
'ffmpeg -i {self.file.path} -map 0 -map 0 -c:a aac -c:v libx264 -b:v:0 800k -b:v:1 300k -var_stream_map "v:0,name:800k v:1,name:300k" -f dash -dash_segment_type mp4 -single_file 1 {file_dir}/dash.mpd'usingos.systemfrom Python, but then the player gets stuck at buffering.



<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT2M30.5S" maxsegmentduration="PT5.0S" minbuffertime="PT16.6S">
 <programinformation>
 </programinformation>
 <servicedescription>
 </servicedescription>
 <period start="PT0.0S">
 <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="30000/1001" maxwidth="1280" maxheight="720" par="16:9" lang="und">
 <representation mimetype="video/mp4" codecs="avc1.64001f" bandwidth="800000" width="1280" height="720" sar="1:1">
 <baseurl>dash-stream0.mp4</baseurl>
 <segmentlist timescale="1000000" duration="5000000" startnumber="1">
 <initialization range="0-854"></initialization>
 <segmenturl mediarange="855-190364" indexrange="855-906"></segmenturl>
 <segmenturl mediarange="190365-448322" indexrange="190365-190416"></segmenturl>
 <segmenturl mediarange="448323-628609" indexrange="448323-448374"></segmenturl>
 <segmenturl mediarange="628610-741660" indexrange="628610-628661"></segmenturl>
 <segmenturl mediarange="741661-1149015" indexrange="741661-741712"></segmenturl>
 <segmenturl mediarange="1149016-1761260" indexrange="1149016-1149067"></segmenturl>
 <segmenturl mediarange="1761261-1829636" indexrange="1761261-1761312"></segmenturl>
 <segmenturl mediarange="1829637-2343368" indexrange="1829637-1829688"></segmenturl>
 <segmenturl mediarange="2343369-2759155" indexrange="2343369-2343420"></segmenturl>
 <segmenturl mediarange="2759156-3120911" indexrange="2759156-2759207"></segmenturl>
 <segmenturl mediarange="3120912-3255416" indexrange="3120912-3120963"></segmenturl>
 <segmenturl mediarange="3255417-3617692" indexrange="3255417-3255468"></segmenturl>
 <segmenturl mediarange="3617693-3910773" indexrange="3617693-3617744"></segmenturl>
 <segmenturl mediarange="3910774-4097693" indexrange="3910774-3910825"></segmenturl>
 <segmenturl mediarange="4097694-4266685" indexrange="4097694-4097745"></segmenturl>
 <segmenturl mediarange="4266686-4609479" indexrange="4266686-4266737"></segmenturl>
 <segmenturl mediarange="4609480-4719699" indexrange="4609480-4609531"></segmenturl>
 <segmenturl mediarange="4719700-4833193" indexrange="4719700-4719751"></segmenturl>
 <segmenturl mediarange="4833194-4905000" indexrange="4833194-4833245"></segmenturl>
 <segmenturl mediarange="4905001-5046627" indexrange="4905001-4905052"></segmenturl>
 </segmentlist>
 </representation>
 </adaptationset>
 <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true" lang="eng">
 <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audiosamplingrate="44100">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
 <baseurl>dash-stream1.mp4</baseurl>
 <segmentlist timescale="1000000" duration="5000000" startnumber="1">
 <initialization range="0-764"></initialization>
 <segmenturl mediarange="765-82409" indexrange="765-816"></segmenturl>
 <segmenturl mediarange="82410-163592" indexrange="82410-82461"></segmenturl>
 <segmenturl mediarange="163593-244493" indexrange="163593-163644"></segmenturl>
 <segmenturl mediarange="244494-325181" indexrange="244494-244545"></segmenturl>
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Do I really need multiple video files in different resolutions ? If not, then how would I go about making the necessary files ? Thanks in advance !


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