Recherche avancée
Médias (1)
-
Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (50)
-
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)
Sur d’autres sites (9094)
-
Filter out voice frequency with FFMpeg
9 août 2022, par shrwUsing
ffmpegcan i filter out thevoice frequency?
I checked the voice frequency is somewhere in 300 Hz to 3000 Hz.
i just want the music from a mp3 file !

-
Imprint an Image above a video's canvas [duplicate]
25 août 2021, par ichthyocentaursI want to add an image strip above/below a video using ffmpeg, but currently it overlaps the video content.


The command I was using


ffmpeg -i ./image_path.png -filter_complex \"[1:v][0:v]scale2ref=(3000/200)*ih/8/sar:ih/8[wm][base];[base][wm]overlay=0:0\" -pix_fmt yuv420p -c:a copy output.mp4

[wm]overlay=0:-200 Does not imprint anything

"pad=height=ih+40:color=#71cbf4,overlay=(main_w-overlay_w)/2:main_h-overlay_h" places at the bottom of the video canvas


I want to place my image strip either above or below the video canvas.


-
FFmpeg h264_v4l2m2m to rtmp
6 juillet 2021, par KnightRexOn an up to date Raspberry Pi 4 B+ 4GB with the Raspberry OS 32bit I'm attempting to stream to an rtmp service, like Youtube or Twitch with FFmpeg using the hardware encoder h264_v4l2m2m but it fails.


Issue


When streaming the streaming service it ingests the input, bitrate and goes live but no output is shown. When connecting to Twitch the stream inspector correctly detects video resolution but fails to detect the codec or fps.


When I replace the stream output to for example a file, test.flv, it records a viewable video with the correct codec (h264/aac) codecs in vlc and ffplay.


When I replace the h264_v4l2m2m encoder with h264_omx it streams the video correctly.


Steps


- 

-
Installed a clean version of the latest Raspi OS 32bit


-
Recompiled FFmpeg to 4.3.2 (to the solve green screen)


-
Record video, creates viewable video :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-t 15 test.flv


-
Start stream, unable to view :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-f flv "<destination uri="uri">"
</destination>

-
Start stream, unable to view (Extended based on comments below) :


ffmpeg \
 -re -f lavfi -i anullsrc \
 -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
 -c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 \
 -c:a aac \
 -f flv "<destination uri="uri">"
</destination>

-
Start stream, with omx works :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_omx -preset ultrafast -pix_fmt yuv420p -g 60 -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-f flv "<destination uri="uri">"
</destination>















Output


With h264_v4l2m2m (invalid output - loglevel verbose) :


$ ffmpeg -re -f lavfi -i anullsrc -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 -c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -c:a aac -f flv <destination url="url">
ffmpeg version n4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 8 (Raspbian 8.3.0-6+rpi1)
 configuration: --prefix=/home/pi/ffmpeg_build --bindir=/home/pi/bin --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --extra-libs='-lpthread -lm -latomic' --enable-omx --enable-encoder=h264_omx
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
[Parsed_anullsrc_0 @ 0x7215c0] sample_rate:44100 channel_layout:'stereo' nb_samples:1024
Input #0, lavfi, from 'anullsrc':
 Duration: N/A, start: 0.000000, bitrate: 705 kb/s
 Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
[video4linux2,v4l2 @ 0x725350] fd:3 capabilities:84a00001
[mjpeg @ 0x1e10210] EOI missing, emulating
Input #1, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 42396.344658, bitrate: N/A
 Stream #1:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[tcp @ 0x72cac0] Starting connection attempt to <destination ip="ip"> port 1935
[tcp @ 0x72cac0] Successfully connected to <destination ip="ip"> port 1935
Stream mapping:
 Stream #1:0 -> #0:0 (mjpeg (native) -> h264 (h264_v4l2m2m))
 Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[graph 0 input from stream 1:0 @ 0x73de00] w:1280 h:720 pixfmt:yuvj422p tb:1/1000000 fr:30/1 sar:0/1 sws_param:flags=2
[auto_scaler_0 @ 0x745400] w:iw h:ih flags:'bicubic' interl:0
[format @ 0x73e750] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[swscaler @ 0x1e300b0] deprecated pixel format used, make sure you did set range correctly
[auto_scaler_0 @ 0x745400] w:1280 h:720 fmt:yuvj422p sar:0/1 -> w:1280 h:720 fmt:yuv420p sar:0/1 flags:0x4
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-isp'
[h264_v4l2m2m @ 0x72a500] driver 'uvcvideo' on card 'USB Video: USB Video'
 Last message repeated 1 times
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-encode'
[h264_v4l2m2m @ 0x72a500] Using device /dev/video11
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-encode'
[h264_v4l2m2m @ 0x72a500] Failed to set number of B-frames
 Last message repeated 1 times
[h264_v4l2m2m @ 0x72a500] Failed to set gop size
[h264_v4l2m2m @ 0x72a500] h264 profile not found
[h264_v4l2m2m @ 0x72a500] Encoder adjusted: qmin (0), qmax (51)
[h264_v4l2m2m @ 0x72a500] Failed to set minimum video quantizer scale
[h264_v4l2m2m @ 0x72a500] Failed to set maximum video quantizer scale
[graph_1_in_0_0 @ 0x786f90] tb:1/44100 samplefmt:u8 samplerate:44100 chlayout:0x3
[format_out_0_1 @ 0x7871d0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0x7887f0] ch:2 chl:stereo fmt:u8 r:44100Hz -> ch:2 chl:stereo fmt:fltp r:44100Hz
Output #0, flv, to '<destination url="url">':
 Metadata:
 encoder : Lavf58.45.100
 Stream #0:0: Video: h264 (h264_v4l2m2m) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=-1--1, 3000 kb/s, 30 fps, 1k tbn, 30 tbc
 Metadata:
 encoder : Lavc58.91.100 h264_v4l2m2m
 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.91.100 aac
[video4linux2,v4l2 @ 0x1e0f410] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame= 1966 fps= 24 q=-0.0 size= 13016kB time=00:01:23.60 bitrate=1275.4kbits/s speed= 1x
</destination></destination></destination></destination>

- 

- deprecated pixel format yuvy422p : video0 has mjpeg and raw output in pixel format yuvy422p.




With h264 omx (works)


libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
Input #0, lavfi, from 'anullsrc':
 Duration: N/A, start: 0.000000, bitrate: 705 kb/s
 Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
[mjpeg @ 0x7c7320] EOI missing, emulating
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 71.378330, bitrate: N/A
 Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Codec AVOption preset (Configuration preset) specified for output file #0 (<destination url="url">) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
 Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (h264_omx))
 Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[swscaler @ 0x7e5180] deprecated pixel format used, make sure you did set range correctly
[h264_omx @ 0x7cb800] Using OMX.broadcom.video_encode
Output #0, flv, to '<destination url="url">':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: h264 (h264_omx) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=2-31, 3000 kb/s, 30 fps, 1k tbn, 30 tbc
 Metadata:
 encoder : Lavc58.35.100 h264_omx
 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.35.100 aac
[flv @ 0x7ca190] Failed to update header with correct duration.rate=1438.3kbits/s speed= 1x
[flv @ 0x7ca190] Failed to update header with correct filesize.
frame= 2190 fps= 24 q=-0.0 Lsize= 16424kB time=00:01:33.20 bitrate=1443.6kbits/s speed= 1x
</destination></destination>

-
Syndiquer tout le site
