
Recherche avancée
Médias (1)
-
Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (92)
-
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
-
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.
Sur d’autres sites (8626)
-
iphone ios sample ffplay main.c —> FFmpeg.c change and input parameter , following errer please advice
4 août 2017, par 224okFFmpeg main c source
int main(int argc, char **argv)
{
int flags, i;
argv[1] = "-i";
argv[2] = "ipod-library://item/item.mp3?id=1218551163727305907";
//argv[2] = "mon.mp3";
argv[3] = "-acodec";
argv[4] = "libfaac";
argv[5] = "-ac";
argv[6] = "2";
argv[7] = "-ar";
argv[8] = "44100";
argv[9] = "-ab";
argv[10] = "128k";
argv[11] = "output.aac";
argv[3] = "-vn";
argv[4] = "-acodec";
argv[5] = "libfaac";
argv[6] = "-ac";
argv[7] = "2";
argv[8] = "-ar";
argv[9] = "44100";
argv[10] = "-ab";
argv[11] = "128k";
argv[12] = "output.aac";
// argv[14] = "rtsp://video.bouygtel.fr/50400/tf1.sdp";
argc += 12;error : ipod-library ://item/item.mp3 ?id=1218551163727305907 : No such file or directory
and if
argv[2] = "mon.mp3" ; ---> mon.mp3 : No such file or directoryplease advice.
-
How to make ffmpeg remux an iPhone MOV (HEVC) that works on Apple products ?
21 janvier 2024, par Mikael FinstadI want to remux a HEVC file (without encoding). I have tried most options, even removing audio, but I cannot get an output file that plays smoothly with Apple products.



First I AirDrop any MOV from an iPhone recorded with the camera in HEVC.



Then run :



ffmpeg -i IMG_4605.MOV -c copy out.mov




Then if I send
out.mov
back to the iPhone and try to play it back, it plays back with glitches while seeking, like this : (original to the right)





When I try to drag the file into a new iMovie project and try to play it back, it freezes the whole iMovie app and needs a force quit.



Doing the same with the original causes no issues, so obviously there is something wrong with the way ffmpeg remuxes it, or something wrong with Apple's software.



ffmpeg -i IMG_4605.MOV 
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
 built with Apple clang version 11.0.0 (clang-1100.0.33.17)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --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-libwebp --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 'IMG_4605.MOV':
 Metadata:
 major_brand : qt 
 minor_version : 0
 compatible_brands: qt 
 creation_time : 2019-12-29T10:20:56.000000Z
 com.apple.quicktime.location.ISO6709: +01.3602+103.9897+024.438/
 com.apple.quicktime.make: Apple
 com.apple.quicktime.model: iPhone 11
 com.apple.quicktime.software: 13.3
 com.apple.quicktime.creationdate: 2019-12-29T18:20:56+0800
 Duration: 00:00:09.00, start: 0.000000, bitrate: 24882 kb/s
 Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 24659 kb/s, 29.99 fps, 29.97 tbr, 600 tbn, 600 tbc (default)
 Metadata:
 rotate : 90
 creation_time : 2019-12-29T10:20:56.000000Z
 handler_name : Core Media Video
 encoder : HEVC
 Side data:
 displaymatrix: rotation of -90.00 degrees
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
 Metadata:
 creation_time : 2019-12-29T10:20:56.000000Z
 handler_name : Core Media Audio
 Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
 Metadata:
 creation_time : 2019-12-29T10:20:56.000000Z
 handler_name : Core Media Metadata
 Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
 Metadata:
 creation_time : 2019-12-29T10:20:56.000000Z
 handler_name : Core Media Metadata
 Stream #0:4(und): Data: none (mebx / 0x7862656D), 17 kb/s (default)
 Metadata:
 creation_time : 2019-12-29T10:20:56.000000Z
 handler_name : Core Media Metadata




ffmpeg -i out.mov
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
 built with Apple clang version 11.0.0 (clang-1100.0.33.17)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --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-libwebp --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 'out.mov':
 Metadata:
 major_brand : qt 
 minor_version : 512
 compatible_brands: qt 
 encoder : Lavf58.29.100
 Duration: 00:00:09.00, start: 0.000000, bitrate: 24860 kb/s
 Stream #0:0: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 24659 kb/s, 29.99 fps, 29.97 tbr, 19200 tbn, 19200 tbc (default)
 Metadata:
 rotate : 90
 handler_name : Core Media Video
 encoder : HEVC
 Side data:
 displaymatrix: rotation of -90.00 degrees
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
 Metadata:
 handler_name : Core Media Audio




If I open
out.mov
in QuickTime and do a trim and export it, then it it still "broken", so I'm thinking there's nothing wrong with the actual muxing into MOV, because QuickTime is passing the error on.


I noticed that
out.mov
has different parameters19200 tbn, 19200 tbc
(vs original600 tbn, 600 tbc
). However, if I force set these to 600 with-video_track_timescale 600
the output file is still broken.


Anyone got some insights ?


-
iPhone ffmpeg dev using libav to decode from AMR to ACC codec
10 octobre 2011, par VictorTIt seems to be that, the AMR support of AudioQueue has been disappeared since iOS 4.3 was released. I can't use audio frame received from RSTP server with old way :
audioFormat.mFormatID = kAudioFormatAMR;
int err = AudioQueueNewOutput(&audioFormat, MyAudioQueueOutputCallback, self, NULL, kCFRunLoopCommonModes, 0, &audioQueue);As a result I received an error in last string.
Maybe someone know how to decode AMR AVPacket into raw buffer and encode it with AAC or MP3 using LIBAV ?
I've tried to use
avcodec_decode_audio3
It works and I can get raw buffer but when I'm trying to encode it with
avcodec_encode_audio
I get 0 as result
This is my method to encode buffer :
- (AVPacket) encodeRawFrame:(const short *) in_buffer withSize:(unsigned int) in_buf_byte_size
{
AVPacket res;
AVCodec *codec;
AVCodecContext *c= NULL;
int count, out_size, outbuf_size, frame_byte_size;
uint8_t *outbuf;
avcodec_init();
avcodec_register_all();
printf("Audio encoding\n");
codec = avcodec_find_encoder(CODEC_ID_AAC);
if (!codec) {
fprintf(stderr, "codec not found\n");
return res;
}
c= avcodec_alloc_context();
c->bit_rate = 64000;
c->sample_rate = 24000;
c->channels = 2;
if (avcodec_open(c, codec) < 0)
{
fprintf(stderr, "could not open codec\n");
}
else
{
frame_byte_size=c->frame_size*2*2;
count = in_buf_byte_size/frame_byte_size;
fprintf(stderr, "Number of frames: %d\n", count);
outbuf_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
outbuf = (uint8_t*) malloc(outbuf_size);
out_size = avcodec_encode_audio(c, outbuf, outbuf_size, &in_buffer[frame_byte_size*i]);
if(out_size >= 0)
{
res.size = outbuf_size;
res.data = malloc(outbuf_size);
}
free(outbuf);
}
avcodec_close(c);
av_free(c);
return res;
}After encoding "out_size" is always 0 and result buffer is empty.
Thanks.