[FFmpeg-user] Audio sample format in alsa?
I'm trying to grab audio from a USB device that's managed by alsa. I find that if I configure pulse to use this device, then I can grab successfully with: ffmpeg -f alsa -i pulse audiotest.mp3 But I need to refer to the hardware device directly, and I'm failing to do that. I have these cards: $ cat /proc/asound/cards 0 [HDMI ]: HDA-Intel - HDA Intel HDMI HDA Intel HDMI at 0xf7e34000 irq 44 1 [UA3FX ]: USB-Audio - UA-3FX EDIROL UA-3FX at usb-:00:14.0-3, full speed 2 [PCH]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xf7e3 irq 43 and these devices: $ cat /proc/asound/devices 1:: sequencer 2: [ 1] : control 3: [ 1- 0]: digital audio playback 4: [ 1- 0]: digital audio capture 5: [ 1- 1]: digital audio playback 6: [ 0] : control 7: [ 0- 3]: digital audio playback 8: [ 0- 7]: digital audio playback 9: [ 0- 8]: digital audio playback 10: [ 0- 9]: digital audio playback 11: [ 0- 0]: hardware dependent 12: [ 2] : control 13: [ 2- 0]: digital audio playback 14: [ 2- 0]: digital audio capture 15: [ 2- 0]: hardware dependent 33:: timer But when I try: $ ffmpeg -f alsa -i hw:1,0 audiotest.mp3 I get: [alsa @ 0x55ac7254fd80] cannot set sample format 0x1 2 (Invalid argument) hw:1,0: Input/output error But I'm not sure where to start with configuring this sample format. Can someone point me in the right direction? I didn't find much in the alsa section of the online manual. Cheers, Simon ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Low CPU HQ format for local streaming?
> > > > > I need to find an encoding, and presumably a file type, that a) works in > a > > streaming format, and b) is as low CPU usage as possible. I don't > believe I > > care about bandwidth, this is just shipped from one process to another > and > > consumed in real time. > > > > I tried using rawvideo, but it crashes out. To distinguish the encoding > > side from the decoding side, I used this command line: > > > > ffmpeg -i capture-4chan.mov -c:v rawvideo -f mpegts - | cat /dev/null > > > > That happens because rawvideo is not a supported video codec in > MPEG-TS. > > And apparently neither are prores nor PCM audio supported codecs. > > If you stream from ffmpeg to ffplay, the "nut" format may be a choice > for you. It streams well, and it handles rawvideo as well as prores and > PCM audio (I just tested with all of these). > This is all most helpful thank you! Being able to ship rawvideo across the system bus rather than compressing it solely to decompress it again has definitely reduced the CPU usage (though mpeg1video was quite low too and an acceptable image for the purpose) so absent anything unexpected I think this will be the route I take. Many thanks Carl and Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] doubt with hardware acceleration
Hello, I'm trying to speed up conversion using hardware acceleration and the improvement is amazing but there a kind of "warning" when using ffmpeg that I would like to "remove". Command and output: $ ffmpeg -vaapi_device /dev/dri/renderD128 -i test.mp4 -vf 'hwupload,scale_vaapi=w=1280:h=720:format=nv12' -c:v h264_vaapi -qp 18 test_hw.mp4ffmpeg version N-98341-gcca982ee01 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --toolchain=hardened --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 55.100 / 56. 55.100 libavcodec 58. 93.100 / 58. 93.100 libavformat 58. 47.100 / 58. 47.100 libavdevice 58. 11.100 / 58. 11.100 libavfilter 7. 86.100 / 7. 86.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.47.100 Duration: 00:00:20.73, start: 0.00, bitrate: 963 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1366x768, 762 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default) Metadata: handler_name : SoundHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_vaapi)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help Duplicate formats in ff_merge_formats detected Output #0, mp4, to 'test_hw.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.47.100 Stream #0:0(und): Video: h264 (h264_vaapi) (High) (avc1 / 0x31637661), vaapi_vld, 1280x720, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.93.100 h264_vaapi Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default) Metadata: handler_name : SoundHandler encoder : Lavc58.93.100 aac frame= 76 fps=0.0 q=-0.0 size= 256kB time=00:00:02.62 bitrate= 799.4kbits/frame= 159 fps=159 q=-0.0 size= 256kB time=00:00:05.38 bitrate= 389.4kbits/frame= 241 fps=160 q=-0.0 size= 512kB time=00:00:08.12 bitrate= 516.1kbits/frame= 318 fps=158 q=-0.0 size= 768kB time=00:00:10.68 bitrate= 589.1kbits/frame= 399 fps=159 q=-0.0 size= 1024kB time=00:00:13.39 bitrate= 626.1kbits/frame= 482 fps=160 q=-0.0 size= 1024kB time=00:00:16.16 bitrate= 519.1kbits/frame= 563 fps=160 q=-0.0 size= 1536kB time=00:00:18.85 bitrate= 667.4kbits/frame= 622 fps=159 q=-0.0 Lsize= 2365kB time=00:00:20.66 bitrate= 937.6kbits/s speed=5.29x video:2016kB audio:324kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.062382% [aac @ 0x55e29ed14e00] Qavg: 223.224 The "warning" is the line Duplicate formats in ff_merge_formats detected I could not find any information about the duplication. Any tips? Kind regards, Leonardo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Low CPU HQ format for local streaming?
Hi Simon, in addition to what Carl Eugen wrote: On Tue, Jun 30, 2020 at 10:21:52 -0600, Simon Roberts wrote: > I need to find an encoding, and presumably a file type, that a) works in a > streaming format, and b) is as low CPU usage as possible. I don't believe I > care about bandwidth, this is just shipped from one process to another and > consumed in real time. > > I tried using rawvideo, but it crashes out. To distinguish the encoding > side from the decoding side, I used this command line: > > ffmpeg -i capture-4chan.mov -c:v rawvideo -f mpegts - | cat /dev/null > > and these appear to be the lines of interest from the output (though I > suspect it's simply that rawvideo doesn't have markers in it that allow a > receiver to know what the heck it's looking at?) If the container has information about the rawvideo, the receiver should be able to play it. > [mpegts @ 0x55f18d555440] Stream 0, codec rawvideo, is muxed as a private > data stream and may not be recognized upon reading. > av_interleaved_write_frame(): Broken pipe > Error writing trailer of pipe:: Broken pipe That happens because rawvideo is not a supported video codec in MPEG-TS. > I also tried using "copy" codec, that is in effect just sending the > prores across the pipe, like this: > > ffmpeg -i capture-4chan.mov -c:v copy -c:a copy -f mpegts - | ffplay > -analyzeduration 10 -f mpegts - > > But that complained too: > [mpegts @ 0x5604ba2e85c0] Stream 0, codec prores, is muxed as a private > data stream and may not be recognized upon reading. > [mpegts @ 0x5604ba2e85c0] Stream 1, codec pcm_s16le, is muxed as a private > data stream and may not be recognized upon reading. And apparently neither are prores nor PCM audio supported codecs. If you stream from ffmpeg to ffplay, the "nut" format may be a choice for you. It streams well, and it handles rawvideo as well as prores and PCM audio (I just tested with all of these). Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Hello Moritz, Tuesday, June 30, 2020, 11:12:13 PM, you wrote: > 192 kb/s stereo vs. 448 kb/s stereo. > They can't be identical, can they? I got it now. I defined stream numbers using tsMuxer and considered TrueHD stream with embedded AC3 stream as one stream while ffmpeg considers them as two separate streams. Thanks! -- Best regards, raistlin.mli...@yandex.ru ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Low CPU HQ format for local streaming?
Am Di., 30. Juni 2020 um 18:22 Uhr schrieb Simon Roberts : > So, I think my question is "what encoding, and what file type" would suit > my needs for a very low CPU overhead, but not caring about bandwidth -vcodec mpeg1video -qscale 2 -mbd 2 (You will probably not be happy with the result, but first, this is the answer to your question and second, "low cpu" is not generally achievable) Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Am 30.06.20 um 21:54 schrieb raistlin.mli...@yandex.ru: > Hello Reindl, > > Tuesday, June 30, 2020, 10:23:54 PM, you wrote: > >> are you mentally ill > > No why? It's probably just you who can't read. Yes I used diff and it > says files are identical if they are identical they have the same checksum it's that easy ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
On Tue, Jun 30, 2020 at 19:31:24 +0300, raistlin.mli...@yandex.ru wrote: > There are 2 sample m2ts files (about 84 MB each): > https://mir.cr/0Y8ROTYT (1) > https://mir.cr/RFI1MNOM (2) > > Stream a:5 in (1) and stream a:4 in (2) are identical (being binary > compared). Though ffmpeg reports they have different MD5 hashes: > > ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - > MD5=cee9775826b81d395c7d012e69309270 Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc Stream #0:1[0x1100](rus): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 384 kb/s Stream #0:2[0x1101](rus): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 448 kb/s Stream #0:3[0x1102](rus): Audio: dts (DTS) ([130][0][0][0] / 0x0082), 48000 Hz, 5.1(side), fltp, 1536 kb/s Stream #0:4[0x1103](eng): Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s32 (24 bit) Stream #0:5[0x1103]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s Stream #0:6[0x1104](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 192 kb/s > ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - > MD5=32ccb6d7af46bfdd2100cd68c7622171 Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc Stream #0:1[0x1100](eng): Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s32 (24 bit) Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s Stream #0:3[0x1101](rus): Audio: dts (DTS) ([130][0][0][0] / 0x0082), 48000 Hz, 5.1(side), fltp, 1536 kb/s Stream #0:4[0x1102](rus): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fltp, 640 kb/s Stream #0:5[0x1103](ukr): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 448 kb/s 192 kb/s stereo vs. 448 kb/s stereo. They can't be identical, can they? Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Hello Reindl, Tuesday, June 30, 2020, 10:23:54 PM, you wrote: > are you mentally ill No why? It's probably just you who can't read. Yes I used diff and it says files are identical. -- Best regards, raistlin.mli...@yandex.ru ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Am 30.06.20 um 21:17 schrieb raistlin.mli...@yandex.ru: > There are 2 sample m2ts files (about 84 MB each): > https://mir.cr/0Y8ROTYT (1) > https://mir.cr/RFI1MNOM (2) > >> you use diff? >> ___ >> ffmpeg-user mailing list >> ffmpeg-user@ffmpeg.org >> https://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> To unsubscribe, visit link above, or email >> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > > Yes. You can try yourself, that's why I gave the links are you mentally ill or why do you think someone goes through all that fuckup of your links enable javasript for half of the world when you just xould do "diff -uNr a b > diff.diff" and post the result as plaintext on a service which don#t require shields down? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Hello Reindl, Tuesday, June 30, 2020, 9:58:33 PM, you wrote: > Am 30.06.20 um 20:51 schrieb raistlin.mli...@yandex.ru: >> Hello Reindl, >> There are 2 sample m2ts files (about 84 MB each): https://mir.cr/0Y8ROTYT (1) https://mir.cr/RFI1MNOM (2) Stream a:5 in (1) and stream a:4 in (2) are identical (being binary compared). Though ffmpeg reports they have different MD5 hashes: ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - MD5=cee9775826b81d395c7d012e69309270 ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - MD5=32ccb6d7af46bfdd2100cd68c7622171 MD5 hashes for these streams being decoded (without '-codec copy') are also different. How could it be >> >>> most files have timestamps inside >> >> Are these timestamps removed by demuxing? As I wrote demuxed tracks >> are byte-to-byte identical > you use diff? > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". Yes. You can try yourself, that's why I gave the links. -- Best regards, raistlin.mli...@yandex.ru ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Am 30.06.20 um 20:51 schrieb raistlin.mli...@yandex.ru: > Hello Reindl, > >>> There are 2 sample m2ts files (about 84 MB each): >>> https://mir.cr/0Y8ROTYT (1) >>> https://mir.cr/RFI1MNOM (2) >>> >>> Stream a:5 in (1) and stream a:4 in (2) are identical (being binary >>> compared). Though ffmpeg reports they have different MD5 hashes: >>> >>> ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - >>> MD5=cee9775826b81d395c7d012e69309270 >>> >>> ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - >>> MD5=32ccb6d7af46bfdd2100cd68c7622171 >>> >>> MD5 hashes for these streams being decoded (without '-codec copy') are >>> also different. >>> >>> How could it be > >> most files have timestamps inside > > Are these timestamps removed by demuxing? As I wrote demuxed tracks > are byte-to-byte identical you use diff? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Hello Reindl, >> There are 2 sample m2ts files (about 84 MB each): >> https://mir.cr/0Y8ROTYT (1) >> https://mir.cr/RFI1MNOM (2) >> >> Stream a:5 in (1) and stream a:4 in (2) are identical (being binary >> compared). Though ffmpeg reports they have different MD5 hashes: >> >> ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - >> MD5=cee9775826b81d395c7d012e69309270 >> >> ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - >> MD5=32ccb6d7af46bfdd2100cd68c7622171 >> >> MD5 hashes for these streams being decoded (without '-codec copy') are >> also different. >> >> How could it be > most files have timestamps inside Are these timestamps removed by demuxing? As I wrote demuxed tracks are byte-to-byte identical. -- Best regards, raistlin.mli...@yandex.ru ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Different MD5 hashes for identical tracks
Am 30.06.20 um 18:31 schrieb raistlin.mli...@yandex.ru: > Hello Ffmpeg-user, > > There are 2 sample m2ts files (about 84 MB each): > https://mir.cr/0Y8ROTYT (1) > https://mir.cr/RFI1MNOM (2) > > Stream a:5 in (1) and stream a:4 in (2) are identical (being binary > compared). Though ffmpeg reports they have different MD5 hashes: > > ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - > MD5=cee9775826b81d395c7d012e69309270 > > ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - > MD5=32ccb6d7af46bfdd2100cd68c7622171 > > MD5 hashes for these streams being decoded (without '-codec copy') are > also different. > > How could it be most files have timestamps inside ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Different MD5 hashes for identical tracks
Hello Ffmpeg-user, There are 2 sample m2ts files (about 84 MB each): https://mir.cr/0Y8ROTYT (1) https://mir.cr/RFI1MNOM (2) Stream a:5 in (1) and stream a:4 in (2) are identical (being binary compared). Though ffmpeg reports they have different MD5 hashes: ffmpeg -loglevel 4 -i 1.m2ts -map 0:a:5 -codec copy -f md5 - MD5=cee9775826b81d395c7d012e69309270 ffmpeg -loglevel 4 -i 0.m2ts -map 0:a:4 -codec copy -f md5 - MD5=32ccb6d7af46bfdd2100cd68c7622171 MD5 hashes for these streams being decoded (without '-codec copy') are also different. How could it be? -- Best regards, raistlin.mli...@yandex.ru ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Low CPU HQ format for local streaming?
Hi, I'm looking to monitor the output of an ffmpeg capture, and am investigating local streaming from ffmpeg to ffplay. The following command line takes input from a file, rather than a capture, but the file is an example of what the capture will generate, so I believe it's representative. ffmpeg -i capture-4chan.mov -f mpegts - | ffplay -f mpegts - The capture...mov file contains prores encoded video, and I don't actually want the audio, though I've not attempted to drop that part yet. I've also succeeded using the matroska file as the format between the two processes. My problem, as was the case in one of my previous questions, seems to be that there's some default encoding going on, and I don't like what it's doing (low quality and high CPU usage), and I want to find a better choice. I need to find an encoding, and presumably a file type, that a) works in a streaming format, and b) is as low CPU usage as possible. I don't believe I care about bandwidth, this is just shipped from one process to another and consumed in real time. I tried using rawvideo, but it crashes out. To distinguish the encoding side from the decoding side, I used this command line: ffmpeg -i capture-4chan.mov -c:v rawvideo -f mpegts - | cat /dev/null and these appear to be the lines of interest from the output (though I suspect it's simply that rawvideo doesn't have markers in it that allow a receiver to know what the heck it's looking at?) [mpegts @ 0x55f18d555440] Stream 0, codec rawvideo, is muxed as a private data stream and may not be recognized upon reading. av_interleaved_write_frame(): Broken pipe Error writing trailer of pipe:: Broken pipe I also tried using "copy" codec, that is in effect just sending the prores across the pipe, like this: ffmpeg -i capture-4chan.mov -c:v copy -c:a copy -f mpegts - | ffplay -analyzeduration 10 -f mpegts - But that complained too: [mpegts @ 0x5604ba2e85c0] Stream 0, codec prores, is muxed as a private data stream and may not be recognized upon reading. [mpegts @ 0x5604ba2e85c0] Stream 1, codec pcm_s16le, is muxed as a private data stream and may not be recognized upon reading. and Failed to open file 'pipe:' or configure filtergraph av_interleaved_write_frame(): Broken pipe Error writing trailer of pipe:: Broken pipe So, I think my question is "what encoding, and what file type" would suit my needs for a very low CPU overhead, but not caring about bandwidth, for this? TIA, Simon -- Simon Roberts (303) 249 3613 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Encoding Warnings
On 06/29/20 11:18, Moritz Barsnick wrote: On Mon, Jun 29, 2020 at 10:44:04 -0400, Jim wrote: AFAIK, ffmpeg does not have the ability to analyze the volume of every sample throughout an audio file, find the greatest amplitude, calculate the adjustment needed to make the loudest part of the file the maximum, It does. and then apply that scaled volume adjustment to the entire file. This makes this a two-pass operation, which your external tool probably also does. ffmpeg can analyze first: $ ffmpeg -i INPUT -map 0:a -af volumedetect -f null - and will find the absolute maximum of the first audio channel. Take the max value from the log (something like "max_volume: -18.1 dB"[*]), and use that value for an additionally inserted "volume" audio filter in your conversion. $ ffmpeg -i INPUT [...] -af volume="18.1 dB",otherfilters OUTPUT You thus only have an additional input analysis step. [*] Documentation says this will not cause any clipping, though I don't know what the behaviour is, if the volume is massively different across channels. I *believe* the maximum is safe to use (while the average is also an average across channels, by some kind of mixdown). same question in my searching for a solution to this same message - this is the first time I've read this. (I personally find this confusing as well.) (Assuming I don't run into anything weird when processing different video formats in the future of course. ;) ) I'm happy, happy, happy about that! :) :) :) We like happy people. :-) Cheers, Moritz ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". On 29 Jun 2020, at 15:44, Jim wrote: (While this doesn't equalize the volume or eliminate all volume-related inconsistencies, it does make the loudest part of each video the same and is the best solution I've found; I think you would like the loudnorm filter that incorporates ebur-128 adjustments. It can run as two pass or one pass (useful for live streaming) and adjusts the audio levels to maintain the specified levels. An example would be -af loudnorm=I=-23:TP=-1.0:LRA=11 This sets the average loudness at -23LUFS (this is pretty standard for UK TV) the True Peak value as -1.0dBfs and the loudness range shows the distribution of loudness throughout the programme. LUFS is great because it is based on perceptual loudness and not just sample values. Have fun Adam I would like to say that the progress this project has made since I initially wrote this script is absolutely amazing! When I first wrote my processing script, I wanted to simply down-sample the audio from n channels to stereo and transcode to MP3 - no volume manipulation at all. (The DVR I had at the time would totally freak if I threw audio at it with more than 2 channels.) There were many people complaining about it at the time, but no real solutions. I had to use a 2-step process - dump to stereo wave and then encode to MP3 - because ffmpeg refused to reduce the number of channels in an audio stream. (Having to do this 2-step process combined with my continual frustration with the volume of various files is what led me to work out the maximization of the volume throughout each file.) Now, ffmpeg has the ability to do everything itself! I know it's been several years, but still... excellent work guys - very impressive. :) Jim ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Encoding Warnings
On 06/29/20 17:39, Carl Eugen Hoyos wrote: Interesting that this warning is not present in the windows version of ffmpeg yet is on Linux. Any idea why that would be? Even more You do realize that FFmpeg offers neither a "windows version" nor a "Linux" version but only source code? I absolutely do understand that Carl. I am sorry - should have phrased it differently. 'Windows version' = the older version that I had running on the computer that recently died which ran the windows xp professional operating system, the full version of which was reported in my original post: ffmpeg version N-78758-g5156578 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 5.3.0 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib libavutil 55. 19.100 / 55. 19.100 libavcodec 57. 27.100 / 57. 27.100 libavformat 57. 26.100 / 57. 26.100 libavdevice 57. 0.101 / 57. 0.101 libavfilter 6. 37.100 / 6. 37.100 libswscale 4. 0.100 / 4. 0.100 libswresample 2. 0.101 / 2. 0.101 libpostproc 54. 0.100 / 54. 0.100 When I said 'Linux version', I was referring to the newer version I am running on the Linux machine: ffmpeg version 4.3-statichttps://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat58. 45.100 / 58. 45.100 libavdevice58. 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 libpostproc55. 7.100 / 55. 7.100 What I should have said was: "Interesting that this warning is not present in ffmpeg version N-78758-g5156578 running on a windows xp operating system yet is on ffmpeg version 4.3-static running on Ubuntu Linux 20.04, each with the above reported compilation options & versions of the related libraries, when operating on identical files." I apologize - did not realize that using shorthand as I did would cause confusion. I've no idea how N-78758-g5156578 compares with 4.3-static as far as age goes, other than it's older because I've been running it for years. (And this is assuming it's not something to do with the underlying operating system and not ffmpeg itself.) I am curious as to why the older version doesn't issue a warning that the newer version does, but it's not important either. Jim ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] last 2 seconds are cut recording screen - hardware aceleration
Hello, > For x264 compressed video use -crf 17see for other options > https://trac.ffmpeg.org/wiki/Encode/H.264 > For aac audio compression use -b:a 192k for the bitrate see for other > options https://trac.ffmpeg.org/wiki/Encode/AAC Thank you Kind regards, Leonardo ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] last 2 seconds are cut recording screen - hardware aceleration
On 30/06/2020, Leonardo via ffmpeg-user wrote: > Hello, > > I'm trying to use ffmpeg to record the computer screen and also audio from > microfone. Googling I found a lot of "how to". Although I can now record, I > do have a few questions (3): > > 1) Using command > > $ ffmpeg -thread_queue_size 512 -f alsa -ac 2 -ar 44100 -i hw:0,0 > -video_size 1024x768 -probesize 10M -framerate 30 -thread_queue_size 512 -f > x11grab -i :0.0 -c:a aac -c:v libx264 -vf "format=yuv420p" output.mp4 > 3) Are those commands above "correct"? I mean, is there something "wrong" or > can it be improved to reduce file size, improve video quality or sound > quality? I know that ffmpeg has tons of options and "improve" is not a clear > question. For x264 compressed video use -crf 17see for other options https://trac.ffmpeg.org/wiki/Encode/H.264 For aac audio compression use -b:a 192k for the bitrate see for other options https://trac.ffmpeg.org/wiki/Encode/AAC $ ffmpeg -thread_queue_size 512 -f alsa -ac 2 -ar 44100 -i hw:0,0 -video_size 1024x768 -probesize 10M -framerate 30 -thread_queue_size 512 -f x11grab -i :0.0 -c:a aac -b:a 192k -c:v libx264 -crf 17 -vf "format=yuv420p" output.mp4 ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] write output of find_rect to a file?
Am 29.06.2020 um 22:28 schrieb Moritz Barsnick: On Mon, Jun 29, 2020 at 17:35:50 +0200, Michael Koch wrote: Very good, that's exactly what I need. I did already make some tests with -show_entries before I posted this question. But I didn't know the names of the variables "lavfi.rect.x" and "lavfi.rect.y". Are these variables documented somewhere? Good point. It's not in the documentation, I got this from the source. Apparently, the filter was designed mainly for use with another filter. Is there also a variable for the quality of the find_rect result, I mean the number that's compared against the detection threshold? No, that value is not exposed. (You could try modifying the source yourself, or, if you make a very good point about it, make a feature request.) Unfortunately I can't compile ffmpeg myself on my Windows system. Ticket 8766 (I've also added some other things that are missing in the documentation) It's important to also have the "best_score" value to the log file, because it contains valuable information about how reliable the x,y coordinates are. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] RTMP and proxy
Thanks a lot Moritz, I figured the option placement later on, I thought it applied to the whole command. And you're right, all is done so that I can't stream from inside the company to outside the company... except the company now wants to stream outside. I will try to get a SOCKS proxy installed... and will go on with my redsocks2 experiments (it worked on one machine) with the CONNECT proxy command. Best regards, On Mon, Jun 29, 2020 at 10:26 PM Moritz Barsnick wrote: > > On Mon, Jun 29, 2020 at 19:23:25 +0200, Verachten Bruno wrote: > > I'm trying to get ffmpeg to use a proxy. Here is my command: > > ffmpeg -http_proxy "http://192.168.0.217:3128/; -i sample.h264 -c:v > > copy -c:a copy -f flv "rtmp://live-cdg.twitch.tv/app/live_toto" > > -loglevel debug > > Option http_proxy not found. > > > > Why do I get "option http_proxy not found"? > > Because you specified it as an option for the input file. > > I assume you will get the same error, though, when you "correctly" > place the option before your output URI, because RTMP does not support > this option either. As far as I understand, RTMP is nothing like HTTP, > so an HTTP proxy would be of no use. > > Apparently, RTMPT is the protocol that was made for encapsulating RTMP > in HTTP, but then twitch would have to support that too, in order for > it to work for you. > > (If you are in an environment with an HTTP proxy but no SOCKS proxy, > and no direct internet access, then this is exactly the sort of thing > they are trying to prevent you doing.) > > Cheers, > Moritz > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". -- Bruno Verachten ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
