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Médias (91)
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DJ Z-trip - Victory Lap : The Obama Mix Pt. 2
15 septembre 2011
Mis à jour : Avril 2013
Langue : English
Type : Audio
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Matmos - Action at a Distance
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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DJ Dolores - Oslodum 2004 (includes (cc) sample of “Oslodum” by Gilberto Gil)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Danger Mouse & Jemini - What U Sittin’ On ? (starring Cee Lo and Tha Alkaholiks)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Cornelius - Wataridori 2
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Rapture - Sister Saviour (Blackstrobe Remix)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Sur d’autres sites (2887)
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How can record music playing on headphone ?
27 avril 2022, par showkeyList all the cards in my pc :


pacmd list-cards 
2 card(s) available.
 index: 1
 name: 
 driver: 
 owner module: 7
 properties:
 alsa.card = "0"
 alsa.card_name = "HD-Audio Generic"
 alsa.long_card_name = "HD-Audio Generic at 0xfccc8000 irq 59"
 alsa.driver_name = "snd_hda_intel"
 device.bus_path = "pci-0000:09:00.1"
 sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:09:00.1/sound/card0"
 device.bus = "pci"
 device.vendor.id = "1002"
 device.vendor.name = "Advanced Micro Devices, Inc. [AMD/ATI]"
 device.product.id = "15de"
 device.product.name = "Raven/Raven2/Fenghuang HDMI/DP Audio Controller"
 device.string = "0"
 device.description = "Raven/Raven2/Fenghuang HDMI/DP Audio Controller"
 module-udev-detect.discovered = "1"
 device.icon_name = "audio-card-pci"
 profiles:
 output:hdmi-stereo: Digital Stereo (HDMI) Output (priority 5900, available: no)
 output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (priority 800, available: no)
 output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (priority 800, available: no)
 output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (priority 5700, available: no)
 output:hdmi-surround-extra1: Digital Surround 5.1 (HDMI 2) Output (priority 600, available: no)
 output:hdmi-surround71-extra1: Digital Surround 7.1 (HDMI 2) Output (priority 600, available: no)
 output:hdmi-stereo-extra2: Digital Stereo (HDMI 3) Output (priority 5700, available: no)
 output:hdmi-surround-extra2: Digital Surround 5.1 (HDMI 3) Output (priority 600, available: no)
 output:hdmi-surround71-extra2: Digital Surround 7.1 (HDMI 3) Output (priority 600, available: no)
 off: Off (priority 0, available: unknown)
 active profile: <off>
 ports:
 hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)
 properties:
 device.icon_name = "video-display"
 hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: no)
 properties:
 device.icon_name = "video-display"
 hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)
 properties:
 device.icon_name = "video-display"
 index: 2
 name: 
 driver: 
 owner module: 8
 properties:
 alsa.card = "2"
 alsa.card_name = "HD-Audio Generic"
 alsa.long_card_name = "HD-Audio Generic at 0xfccc0000 irq 60"
 alsa.driver_name = "snd_hda_intel"
 device.bus_path = "pci-0000:09:00.6"
 sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:09:00.6/sound/card2"
 device.bus = "pci"
 device.vendor.id = "1022"
 device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
 device.product.id = "15e3"
 device.product.name = "Family 17h (Models 10h-1fh) HD Audio Controller"
 device.string = "2"
 device.description = "Family 17h (Models 10h-1fh) HD Audio Controller"
 module-udev-detect.discovered = "1"
 device.icon_name = "audio-card-pci"
 profiles:
 input:analog-stereo: Analog Stereo Input (priority 65, available: no)
 output:analog-stereo: Analog Stereo Output (priority 6500, available: unknown)
 output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6565, available: no)
 output:analog-surround-40: Analog Surround 4.0 Output (priority 1200, available: unknown)
 output:analog-surround-40+input:analog-stereo: Analog Surround 4.0 Output + Analog Stereo Input (priority 1265, available: no)
 output:analog-surround-51: Analog Surround 5.1 Output (priority 1300, available: unknown)
 output:analog-surround-51+input:analog-stereo: Analog Surround 5.1 Output + Analog Stereo Input (priority 1365, available: no)
 output:iec958-stereo: Digital Stereo (IEC958) Output (priority 5500, available: unknown)
 output:iec958-stereo+input:analog-stereo: Digital Stereo (IEC958) Output + Analog Stereo Input (priority 5565, available: no)
 output:iec958-ac3-surround-51: Digital Surround 5.1 (IEC958/AC3) Output (priority 300, available: unknown)
 output:iec958-ac3-surround-51+input:analog-stereo: Digital Surround 5.1 (IEC958/AC3) Output + Analog Stereo Input (priority 365, available: no)
 off: Off (priority 0, available: unknown)
 active profile: 
 sinks:
 alsa_output.pci-0000_09_00.6.analog-stereo/#0: Family 17h (Models 10h-1fh) HD Audio Controller Analog Stereo
 sources:
 alsa_output.pci-0000_09_00.6.analog-stereo.monitor/#1: Monitor of Family 17h (Models 10h-1fh) HD Audio Controller Analog Stereo
 ports:
 analog-input-front-mic: Front Microphone (priority 8500, latency offset 0 usec, available: no)
 properties:
 device.icon_name = "audio-input-microphone"
 analog-input-rear-mic: Rear Microphone (priority 8200, latency offset 0 usec, available: no)
 properties:
 device.icon_name = "audio-input-microphone"
 analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: no)
 properties:
 
 analog-output-lineout: Line Out (priority 9000, latency offset 0 usec, available: yes)
 properties:
 
 analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: yes)
 properties:
 device.icon_name = "audio-headphones"
 iec958-stereo-output: Digital Output (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
 properties:
</off>

Playing a music on speaker,record it with ffmpeg and save as
music.mp3in current directory.

device_speaker="alsa_output.pci-0000_09_00.6.analog-stereo.monitor"
ffmpeg -f pulse -i $device_speaker music.mp3


I turn off the speaker and play the music on my headphone,how can record it with ffmpeg ?


-
regarding h264_qsv encoding speed in ffmpeg
31 janvier 2021, par TONYAs we know, now ffmpeg supports intel hardware encoding(h264 qsv).
But it doesn't support "ultra fast", is there any settings to improve the encoding speed ?


m_encoder = avcodec_find_encoder_by_name("h264_qsv");
if(m_encoder == nullptr){
 LOG(ERROR)<<"Find H264 Encoder failed";
 return false;
}
m_ctx = avcodec_alloc_context3(m_encoder);
m_ctx->bit_rate = bitrate_kbps*1024;
m_ctx->width = m_width;
m_ctx->height = m_height;
m_ctx->time_base = { 1, (int)fps };
m_ctx->qmin = 10;
m_ctx->qmax = 35;
m_ctx->gop_size = fps;
m_ctx->max_b_frames = 0;
m_ctx->has_b_frames = false;

m_ctx->codec_id = m_encoder->id;
m_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
m_ctx->pix_fmt = m_h264InputFormat;

AVDictionary *param = nullptr;
av_dict_set(&param, "look_ahead", "0", 0);
av_dict_set(&param, "look_ahead_depth", "8", 0);
av_dict_set(&param, "preset", "veryfast", 0);
av_dict_set(&param, "tune", "zerolatency", 0);

int ret = avcodec_open2(m_ctx, m_encoder, &param);


-
Unable to extract KLV data from .mpg file
2 novembre 2023, par Arjun ShastryI need to extract the klv data embedded in the following file :
https://samples.ffmpeg.org/MPEG2/mpegts-klv/Day%20Flight.mpg


Currently, I am doing it using ffmpeg and python.
The code works for .ts files like the example given below, but not the above mpg file. :
https://www.arcgis.com/home/item.html?id=55ec6f32d5e342fcbfba376ca2cc409a


I used the following python command, using subprocess, ffmpeg to extract klv data in a binary file and then using klvdata library to tranlate to a readable text file.


#Extract klv data and output as binary file
command=['ffmpeg', '-i', input_video, '-map', 'd','-codec','copy','-f', 'data','out.bin']
process=subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = process.communicate()

print(stdout)
print(stderr)

#Open text file to write json data
outjson=open("./outjson.txt","w")
print("Flag 1")

# Open the out.bin file for reading as binary
with open("./out.bin", "rb") as f:
 sample=[]
 cnt=0
 for packet in klvdata.streamparser.StreamParser(f):
 pack=[]
 metadata = packet.MetadataList()
 for i in (5,6,7,13,14,15,18,19,23,24,25,26,27,28,29,30,31,32,33):#Only extracting required data
 pack.append(metadata[i][-1])
 sample.append(pack)
 sampleLength=(len(sample))
 json.dump(sample,outjson,indent=4) # Convert the metadata to a string and write it to outtext.txt


When doing it for "Day Flight.mpg", the following error occurs :


58. 19.100 / 58. 19.100\r\n libavcodec 60. 26.100 / 60. 26.100\r\n libavformat 60. 11.100 / 60. 11.100\r\n libavdevice 60. 2.101 / 60. 2.101\r\n libavfilter 9. 11.100 / 9. 11.100\r\n libswscale 7. 3.100 / 7. 3.100\r\n libswresample 4. 11.100 / 4. 11.100\r\n libpostproc 57. 2.100 / 57. 2.100\r\n[mpegts @ 0000026bb99387c0] start time for stream 1 is not set in estimate_timings_from_pts\r\nInput #0, mpegts, from 'C:/Users/ashastry/Downloads/Day Flight.mpg':\r\n Duration: 00:03:14.88, start: 10.000000, bitrate: 4187 kb/s\r\n Program 1 \r\n Stream #0:0[0x1e1]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720, 60 fps, 60 tbr, 90k tbn\r\n Stream #0:1[0x1f1]: Data: klv (KLVA / 0x41564C4B)\r\nOutput #0, data, to 'out.bin':\r\n Metadata:\r\n encoder : Lavf60.11.100\r\n Stream #0:0: Data: klv (KLVA / 0x41564C4B)\r\nStream mapping:\r\n Stream #0:1 -> #0:0 (copy)\r\nPress [q] to stop, [?] for help\r\nsize= 0kB time=00:00:00.00 bitrate=N/A speed=N/A \rsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x \rsize= 1kB time=00:00:00.00 bitrate=N/A speed= 0x \r[out#0/data @ 0000026bbb61b300] video:0kB audio:0kB subtitle:0kB other streams:1kB global headers:0kB muxing overhead: 0.000000%\r\nsize= 1kB time=00:00:00.00 bitrate=N/A speed= 0x \r\n"
Flag 1
Traceback (most recent call last):

 File C:\ProgramData\anaconda3\Lib\site-packages\spyder_kernels\py3compat.py:356 in compat_exec
 exec(code, globals, locals)

 File c:\users\ashastry\desktop\gis\javascript\extract.py:34
 metadata = packet.MetadataList()

AttributeError: 'UnknownElement' object has no attribute 'MetadataList'


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