Recherche avancée
Médias (2)
-
Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
-
Podcasting Legal guide
16 mai 2011, par
Mis à jour : Mai 2011
Langue : English
Type : Texte
Autres articles (54)
-
Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...) -
Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...)
Sur d’autres sites (4181)
-
FFMPEG - Invalid and inefficient vfw-avi packed B frames detected -> ffmpeg doesn't stop at given endpoint
14 avril 2014, par user2198746I am quite new to ffmpeg and video converting in general. I use ffmpeg to extract the first 30 seconds of a movie and convert it to mov. Everything worked fine until one of my video files caused ffmpeg to warn me with this message :
Invalid and inefficient vfw-avi packed B frames detectedThen the converting starts, but doesn't stop after the the 30 seconds mark is reached.
frame= 1949 fps= 22 q=28.0 size= 4284kB time=30.01 bitrate=1169.2kbits/sThe frame count is still increasing, the time stays at 30.01 ...
Here's the ffmpeg command i am using
ffmpeg -y -i input.avi -ss 00:00:00.0 -t 00:00:30.0 -vf scale="1024:trunc(ow/a/2)*2" -acodec copy output.mov -
libav seeking to n seconds in a video and saving frames there onwards
7 juillet 2022, par Sam KoreI've been trying to seek in a mpegts video file. After exploring many codes, I've come up to the following stage of fetching frames and saving them.
However after using av_seek_frame also I'm getting following results :


- 

- Initial 7-8 frames are saved as grey frames.
- Thereafter frames are fetched from beginning of the video only. i.e. 0 seconds onwards, while I'm trying to seek from say 12th seconds onwards.






Can you please explain how should I be calculating the timestamp and do the things correctly ?



int main(int argc, const char *argv[])
{

 int stream_id;
 int64_t timestamp;
 char ts_buf[60];


 if (argc < 2) {
 printf("You need to specify a media file.\n");
 return -1;
 }
 
 logging("initializing all the containers, codecs and protocols.");

 
 AVFormatContext *pFormatContext = avformat_alloc_context();
 if (!pFormatContext) {
 logging("ERROR could not allocate memory for Format Context");
 return -1;
 }

 logging("opening the input file (%s) and loading format (container) header", argv[1]);
 
 if (avformat_open_input(&pFormatContext, argv[1], NULL, NULL) != 0) {
 logging("ERROR could not open the file");
 return -1;
 }

 logging("format %s, duration %lld us, bit_rate %lld", pFormatContext->iformat->name, pFormatContext->duration, pFormatContext->bit_rate);

 logging("finding stream info from format");
 
 if (avformat_find_stream_info(pFormatContext, NULL) < 0) {
 logging("ERROR could not get the stream info");
 return -1;
 }

 AVCodec *pCodec = NULL;
 AVCodecParameters *pCodecParameters = NULL;
 int video_stream_index = -1;

 // loop though all the streams and print its main information
 for (int i = 0; i < pFormatContext->nb_streams; i++)
 {
 AVCodecParameters *pLocalCodecParameters = NULL;
 pLocalCodecParameters = pFormatContext->streams[i]->codecpar;
 logging("AVStream->time_base before open coded %d/%d", pFormatContext->streams[i]->time_base.num, pFormatContext->streams[i]->time_base.den);
 logging("AVStream->r_frame_rate before open coded %d/%d", pFormatContext->streams[i]->r_frame_rate.num, pFormatContext->streams[i]->r_frame_rate.den);
 logging("AVStream->start_time %" PRId64, pFormatContext->streams[i]->start_time);
 logging("AVStream->duration %" PRId64, pFormatContext->streams[i]->duration);

 logging("finding the proper decoder (CODEC)");

 AVCodec *pLocalCodec = NULL;

 pLocalCodec = avcodec_find_decoder(pLocalCodecParameters->codec_id);

 if (pLocalCodec==NULL) {
 logging("ERROR unsupported codec!");
 // In this example if the codec is not found we just skip it
 continue;
 }

 // when the stream is a video we store its index, codec parameters and codec
 if (pLocalCodecParameters->codec_type == AVMEDIA_TYPE_VIDEO) {
 if (video_stream_index == -1) {
 video_stream_index = i;
 pCodec = pLocalCodec;
 pCodecParameters = pLocalCodecParameters;
 }

 logging("Video Codec: resolution %d x %d", pLocalCodecParameters->width, pLocalCodecParameters->height);
 } else if (pLocalCodecParameters->codec_type == AVMEDIA_TYPE_AUDIO) {
 logging("Audio Codec: %d channels, sample rate %d", pLocalCodecParameters->channels, pLocalCodecParameters->sample_rate);
 }

 // print its name, id and bitrate
 logging("\tCodec %s ID %d bit_rate %lld", pLocalCodec->name, pLocalCodec->id, pLocalCodecParameters->bit_rate);
 }

 if (video_stream_index == -1) {
 logging("File %s does not contain a video stream!", argv[1]);
 return -1;
 }

 AVCodecContext *pCodecContext = avcodec_alloc_context3(pCodec);
 if (!pCodecContext)
 {
 logging("failed to allocated memory for AVCodecContext");
 return -1;
 }

 if (avcodec_parameters_to_context(pCodecContext, pCodecParameters) < 0)
 {
 logging("failed to copy codec params to codec context");
 return -1;
 }

 if (avcodec_open2(pCodecContext, pCodec, NULL) < 0)
 {
 logging("failed to open codec through avcodec_open2");
 return -1;
 }

 AVFrame *pFrame = av_frame_alloc();
 if (!pFrame)
 {
 logging("failed to allocate memory for AVFrame");
 return -1;
 }

 AVPacket *pPacket = av_packet_alloc();
 if (!pPacket)
 {
 logging("failed to allocate memory for AVPacket");
 return -1;
 }

 /*seek for 20 seconds*/
 int64_t incr, pos = 5;

 int64_t seek_target = (pos * AV_TIME_BASE), stream_index = 0, how_many_packets_to_process = 50, response = 0;

 printf("seek_target before : %lu\n", seek_target);
 seek_target = av_rescale_q(seek_target, AV_TIME_BASE_Q, pFormatContext->streams[stream_index]->time_base);

 printf("seek_target after: %lu\n", seek_target);

 do
 {
 response = decode_packet(pFormatContext, pPacket, pCodecContext, pFrame, seek_target);
 if (response < 0)
 break;
 avcodec_flush_buffers(pCodecContext);

 /*av_frame_unref(pFrame);
 av_packet_unref(pPacket);*/
 // stop it, otherwise we'll be saving hundreds of frames
 if (--how_many_packets_to_process <= 0) 
 break;

 }while(1);

logging("releasing all the resources");

 avformat_close_input(&pFormatContext);
 av_packet_free(&pPacket);
 av_frame_free(&pFrame);
 avcodec_free_context(&pCodecContext);
 return 0;
}


int decode_packet(AVFormatContext *pFormatContext, AVPacket *pPacket, AVCodecContext *pCodecContext, AVFrame *pFrame, int64_t seek_target)
{
 if(av_seek_frame(pFormatContext, 0, /*(startTime + frameTimestamp) / 10*/seek_target, AVSEEK_FLAG_BACKWARD) < 0)
 {
 printf("error while seeking\n"/*, pFormatContext->filename*/);
 return -1;
 }
 avcodec_flush_buffers(pCodecContext);

 while(1)
 {
 if(av_read_frame(pFormatContext, pPacket) < 0)
 {
 logging("av_read_frame failure");
 break;
 }

 /* I'm not able to get to correct timestamp to discard prior frames upto desired seconds. This if hasn't worked out well as of now. */
 if((av_q2d(pFormatContext->streams[0]->time_base) * pPacket->pts) < (seek_target * 1000))
 {
 printf("skipping the frame\npFormatContext->streams[0]->time_base: %d %d\tpckt.pts: %lu\tseek: %lu", pFormatContext->streams[0]->time_base.num, pFormatContext->streams[0]->time_base.den, pPacket->pts, seek_target);
 av_packet_unref(pPacket);
 continue;
 }

 // Send Packet for decoding
 int response = avcodec_send_packet(pCodecContext, pPacket);

 if (response < 0) {
 logging("Error while sending a packet to the decoder: %s", av_err2str(response));
 return response;
 }

 while (response >= 0)
 {
 response = avcodec_receive_frame(pCodecContext, pFrame);
 if (response == AVERROR(EAGAIN) || response == AVERROR_EOF) {
 break;
 } else if (response < 0) {
 logging("Error while receiving a frame from the decoder: %s", av_err2str(response));
 return response;
 }

 if (response >= 0) {
 logging(
 "Frame %d (type=%c, size=%d bytes, format=%d) pts %d key_frame %d [DTS %d]: %d",
 pCodecContext->frame_number,
 av_get_picture_type_char(pFrame->pict_type),
 pFrame->pkt_size,
 pFrame->format,
 pFrame->pts,
 pFrame->key_frame,
 pFrame->coded_picture_number,
 pPacket->dts
 );

 char frame_filename[1024];
 snprintf(frame_filename, sizeof(frame_filename), "%s-%d.pgm", "im/frame", pCodecContext->frame_number);

 if (pFrame->format != AV_PIX_FMT_YUV420P)
 {
 logging("Warning: the generated file may not be a grayscale image, but could e.g. be just the R component if the video format is RGB");
 }
 // save a grayscale frame into a .pgm file
 save_gray_frame(pFrame->data[0], pFrame->linesize[0], pFrame->width, pFrame->height, frame_filename);

 av_frame_unref(m_pAVFrame);
 
 }
 }
 }
 return 0;
}




-
FFMPEG - rewarp MPEGDash to MP4 changes audio bitrate mode
30 juin 2022, par Matthieu DucorpsI'm rewrapping some MPEGDash to MP4 wrapper and some files are outputed with variable audio bitrate where others with constant bitrate,and both sources looks exactly the same.


For reference :


I'm using FFMPEG 5.0 for the rewrapping


ffmpeg version 5.0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 11.2.0 (Rev5, 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-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. 17.100 / 57. 17.100
 libavcodec 59. 18.100 / 59. 18.100
 libavformat 59. 16.100 / 59. 16.100
 libavdevice 59. 4.100 / 59. 4.100
 libavfilter 8. 24.100 / 8. 24.100
 libswscale 6. 4.100 / 6. 4.100
 libswresample 4. 3.100 / 4. 3.100
 libpostproc 56. 3.100 / 56. 3.100


And MediaInfo 22.09 to check the medias.




I'm using this command to rewrap the media :


ffmpeg.exe -y -i MPEGDash.mpd -map 0:v -map 0:a -c copy OutFile.mp4


This source MPEGDASH with constant audio bitrate


General
Complete name : \\Constant\PROXY\A0002_30sec\MPEGDash_A0002_30sec.mpd
Format : DASH MPD
File size : 4.14 MiB
Duration : 30 s 80 ms
Overall bit rate mode : Constant
Overall bit rate : 1 154 kb/s

Video
ID : 0-1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=3, N=30
Muxing mode : dash
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 30 s 30 ms
Bit rate mode : Constant
Bit rate : 640 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.093
Stream size : 2.28 MiB (55%)
Language : English
Encoded date : UTC 2022-06-30 08:20:16
Tagged date : UTC 2022-06-30 08:20:16
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Source : V0_360p_640000/V0_360p_640000_init.mp4
Codec configuration box : avcC

Audio #1
ID : 160-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:20:16
Tagged date : UTC 2022-06-30 08:20:16
Source : A0_48000_128000/A0_48000_128000_init.mp4

Audio #2
ID : 161-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:20:16
Tagged date : UTC 2022-06-30 08:20:16
Source : A1_48000_128000/A1_48000_128000_init.mp4

Audio #3
ID : 162-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:20:16
Tagged date : UTC 2022-06-30 08:20:16
Source : A2_48000_128000/A2_48000_128000_init.mp4

Audio #4
ID : 163-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:20:16
Tagged date : UTC 2022-06-30 08:20:16
Source : A3_48000_128000/A3_48000_128000_init.mp4


Has the expected output with constant audio bitrate on the MP4


General
Complete name : \\Constant\PROXY\A0002_30sec\A0002_30sec.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 4.13 MiB
Duration : 30 s 96 ms
Overall bit rate mode : Constant
Overall bit rate : 1 152 kb/s
Movie name : MPEGDash_A0002_30sec.mpd
Writing application : Lavf59.16.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=3, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 30 s 96 ms
Source duration : 29 s 997 ms
Bit rate mode : Constant
Bit rate : 590 kb/s
Nominal bit rate : 640 kb/s
Maximum bit rate : 636 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.085
Stream size : 2.12 MiB (51%)
Source stream size : 2.28 MiB (55%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 30030
Codec configuration box : avcC

Audio #1
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 1

Audio #2
ID : 3
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 2

Audio #3
ID : 4
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 3

Audio #4
ID : 5
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 4


But this source MPEGDASH which has the same characteristics :


General
Complete name : \\Variable\PROXY\A0005_30sec\MPEGDash_A0005_30sec.mpd
Format : DASH MPD
File size : 4.15 MiB
Duration : 30 s 80 ms
Overall bit rate mode : Constant
Overall bit rate : 1 157 kb/s

Video
ID : 0-1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=3, N=30
Muxing mode : dash
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 30 s 30 ms
Bit rate mode : Constant
Bit rate : 640 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.093
Stream size : 2.29 MiB (55%)
Language : English
Encoded date : UTC 2022-06-30 08:24:03
Tagged date : UTC 2022-06-30 08:24:03
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Source : V0_360p_640000/V0_360p_640000_init.mp4
Codec configuration box : avcC

Audio #1
ID : 160-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 461 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:24:03
Tagged date : UTC 2022-06-30 08:24:03
Source : A0_48000_128000/A0_48000_128000_init.mp4

Audio #2
ID : 161-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:24:03
Tagged date : UTC 2022-06-30 08:24:03
Source : A1_48000_128000/A1_48000_128000_init.mp4

Audio #3
ID : 162-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:24:03
Tagged date : UTC 2022-06-30 08:24:03
Source : A2_48000_128000/A2_48000_128000_init.mp4

Audio #4
ID : 163-1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Muxing mode : dash
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Encoded date : UTC 2022-06-30 08:24:03
Tagged date : UTC 2022-06-30 08:24:03
Source : A3_48000_128000/A3_48000_128000_init.mp4


Has this output where the MP4 have the first audio with variable bitrate


General
Complete name : \\Variable\PROXY\A0005_30sec\A0005_30sec.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 4.14 MiB
Duration : 30 s 96 ms
Overall bit rate mode : Variable
Overall bit rate : 1 155 kb/s
Movie name : MPEGDash_A0005_30sec.mpd
Writing application : Lavf59.16.100

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=3, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 30 s 96 ms
Source duration : 29 s 997 ms
Bit rate mode : Constant
Bit rate : 593 kb/s
Nominal bit rate : 640 kb/s
Maximum bit rate : 640 kb/s
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.086
Stream size : 2.13 MiB (51%)
Source stream size : 2.29 MiB (55%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 30030
Codec configuration box : avcC

Audio #1
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Variable
Bit rate : 126 kb/s
Maximum bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 461 KiB (11%)
Language : English
Default : Yes
Alternate group : 1

Audio #2
ID : 3
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 2

Audio #3
ID : 4
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 3

Audio #4
ID : 5
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 30 s 80 ms
Bit rate mode : Constant
Bit rate : 125 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 460 KiB (11%)
Language : English
Default : Yes
Alternate group : 4


Maybe I'm missing something but,I don't see what.


Syndiquer tout le site
