July 2019 - ffmpeg-user - lists.ffmpeg.org

Why minterpolate operation is very slow on my ffmpeg?
by Алексей 15 Jul '19

15 Jul '19

I tried to use minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=60, but have a very slow encoding speed=, 0.0xxx If I tried to use mi_mode=blend it will be more faster, but I don't like this method, because it isn't liek to me.. What problem with aobmc mode, and how I can to encrease processing operation speed? Thanks dd.

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Panasonic GH4 4K live stream using ffmpeg
by Michael Shaffer 15 Jul '19

15 Jul '19

Can anyone recommend a good HDMI input card that will work with ffmpeg in Ubuntu Linux? Thanks, Michael Shaffer

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WebVTT Subtitle width
by Casper Bezemer 15 Jul '19

15 Jul '19

I have tried to rip the subtitle from some mkv file and convert it into webvtt using ` ffmpeg -i somevideo.mkv -map 0:s:0 subtitlefile.vtt` Everything went fine, I got a decent subtitle file, except that the linewidth for the vtt file is different than the linewidth I see when I play the original video. This is due to the linebreaks that are placed in the vtt file that are not in the mkv file. Are there any options I can use to specify the linewidth the webvtt converter is going to use? Regards, Casper

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Ip camera stream problem with insert logo
by Free1video 14 Jul '19

14 Jul '19

Hello I have raspberry pi and ffmpeg but I not can insert logo in coman line I have this error --> Streamcopy requested for output stream 0:0, which is fed from a complex filtergraph. Filtering and streamcopy cannot be used together. This is my comand line #!/bin/bash SERVICE="ffmpeg" RTSP_URL="rtsp://admin:password@ip:554/1/h264major" YOUTUBE_URL="rtmp://a.rtmp.youtube.com/live2" YOUTUBE_KEY="XXXXXXXXXX" COMMAND="sudo ffmpeg -f lavfi -i anullsrc -thread_queue_size 2048 -re -r 30 use_wallclock_as_timestamps 1 -rtsp_transport tcp -i ${RTSP_URL} -i /home/pi/logo.png -filter_complex overlay -tune zerolatency -vcodec libx264 -t 12:00:00 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv ${YOUTUBE_URL}/${YOUTUBE_KEY}" if sudo /usr/bin/pgrep $SERVICE > /dev/null then echo "${SERVICE} is already running." else echo "${SERVICE} is NOT running! Starting now..." $COMMAND fi Please for Help Best Regards From Free1video.com LTD https://www.youtube.com/channel/UCTaWaFjf5ZBIHiEWHkos5cQ

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Per frame metadata example?
by Francesco Pretto 14 Jul '19

14 Jul '19

Hello, I'm investigating on possibility to encode per frame metadata using ffmpeg API. Naive attempts to set a dictionary on "AVFrame.metadata" with some key values failed without any warning or error during encoding, but no values are retrieved on the field during decoding. I'm using ffmpeg 4.1.3 with modern send/receive API usage. Other users on SO seemed to try similar approach without success[1][2]. I've no specific requirements on container format: any format supporting this feature plus streaming would be good. I first tried with flv, mp4 formats and ended up testing nut format noticing some trace of specific support for the feature[3]. Is there any obvious mistake I'm possibly doing? Is the feature actually supported? Regards, Francesco [1] https://stackoverflow.com/questions/51415447/ffmpeg-sidedata-or-metadata-pe… [2] https://stackoverflow.com/questions/39330048/ffmpeg-per-frame-metadata-with… [3] https://ffmpeg.org/pipermail/ffmpeg-devel/2013-March/141270.html

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Functions for average and variance calulations
by Ulf Zibis 13 Jul '19

13 Jul '19

Hi, are there such functions in the FFmpeg library? I have an integer array with lets say 13 numbers (accumulated counts of X in the range of 0..12) like: a) 0 1 0 1 2 7 9 5 4 3 2 0 1 b) 7 1 9 8 1 6 2 0 0 1 9 1 0 In a) the average X would be ~6 and the variance would be small. In b) the average X would be ~3.5 and the variance would be bigger. I'm looking for functions that can calulate such values with a result in float resolution. -Ulf -- Von meinem Seibert gesendet

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How to corryctly mainterpolate video with low framerate on nvenc?
by Алексей 11 Jul '19

11 Jul '19

I've a low framerated video file, recorded at 24 fps. I need change its framerate to 60 fps, but with smooth playback style adding. Can u help me to do this on my nvenc. Thanks.

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MLP encoder: encodes 24-bit wav files into 16-bit MLP
by fabrice nicol 09 Jul '19

09 Jul '19

I'm experiencing a parallel issue with encoding, the reverse operation of my previous question about the MLP decoder. ffmpeg is build from git source code. Choosing a simple 2-channel 24 -bit 96khz wav file yields: `~ $ /usr/local/bin/ffmpeg -i a_2_24_96.wav -c:a mlp -strict experimental a_2_24_96.mlp` ffmpeg version git-2019-07-05-7c64498 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.1.0 (Gentoo 9.1.0-r1 p1.1) configuration: libavutil 56. 30.100 / 56. 30.100 libavcodec 58. 53.101 / 58. 53.101 libavformat 58. 28.101 / 58. 28.101 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 56.100 / 7. 56.100 libswscale 5. 4.101 / 5. 4.101 libswresample 3. 4.100 / 3. 4.100 Input #0, wav, from 'a_2_24_96.wav': Duration: 00:14:14.05, bitrate: 4608 kb/s Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 96000 Hz, stereo, s32 (24 bit), 4608 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s24le (native) -> mlp (native)) Press [q] to stop, [?] for help Output #0, mlp, to 'a_2_24_96.mlp': Metadata: encoder : Lavf58.28.101 Stream #0:0: Audio: mlp, 96000 Hz, stereo, s16, 128 kb/s Metadata: encoder : Lavc58.53.101 mlp size= 138569kB time=00:14:14.05 bitrate=1329.1kbits/s speed=57.8x video:0kB audio:138569kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000% The output is 16-bit depth not 24-bit: Input #0, mlp, from 'a_2_24_96.mlp': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Audio: mlp, 96000 Hz, stereo,s16 Is this a limitation of the currently still experimental encoder or am I doing something wrong? Fabrice Le 03/07/2019 à 11:17, Moritz Barsnick a écrit : > On Wed, Jul 03, 2019 at 10:17:57 +0200, fabrice nicol wrote: >> The MLP decoder does not seem to work for 24-bit MLP. It converts such >> files into 16-bit WAV, whatever the sample rate. > Actually, you could think so. But the decoder is fine. On the other > hand, the wav output format defaults to 16 bits. > >> `ffmpeg -i /mnt/cdrom/AUDIO_TS/ATS_01_3.AOB ~/a.wav` > [...] >> Stream mapping: >> Stream #0:0 -> #0:0 (mlp (native) -> pcm_s16le (native)) > [...] >> Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 96000 Hz, 5.1, s16, 9216 kb/s > Just add "-c:a pcm_s24le" as an output option. Then you get the full > sample depth. > >> sox --i a.wav > Tested and confirmed with sox here as well. ;-) > > Hope this helps, > Moritz > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user(a)ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-request(a)ffmpeg.org with subject "unsubscribe".

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Raspberry Pi 4 FFMPEG is not working
by Robin A. Jensen 09 Jul '19

09 Jul '19

Hello. This is my first time on ffmpeg mailinglist, so i'm in deep water.... I just got my Raspberry Pi 4 (RPi4) and i'm trying to encode with FFMPEG. I'm using "Buster" OS I already have a RPi3 with FFMPEG and it works fine. (OS = Stretch). I have downloaded all dependicies and ffmpeg is working So I have compiled FFMPEG with the exact same setting in configure: > |configuration: --arch=armel --target-os=linux --enable-gpl --enable-omx --enable-omx-rpi --enable-nonfree --enable-mmal| |I have then used the same test file 'test.ts' containing 3 tracks: 0:0 video 264, 0:1 audio mp2, 0:3 teletext. | |I have startet the encoder with this commandline: >||ffmpeg -fflags +igndts -ss 00:01:00 -c:v h264_mmal -i 'test.ts' -to 00:05:00 -map 0:0 -map 0:1 -c:v h264_omx -b:v 1500k -flags +global_header -c:a:0 copy 'test.mp4'| |But no mather what i do FFMPEG is hanging right after the first encoder line and the sreen looks like this:| |[h264 @ 0x2d950e0] decode_slice_header error [h264 @ 0x2d950e0] no frame! [mpegts @ 0x2d904b0] PES packet size mismatch Last message repeated 1 times Input #0, mpegts, from 'test.ts': Duration: 00:11:20.09, start: 789.536711, bitrate: 11924 kb/s Program 101 Metadata: service_name : DR1 service_provider: YouSee Stream #0:0[0x456]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x457](dan): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s Stream #0:2[0x458](dan): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006) File 'test.mp4' already exists. Overwrite ? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (h264 (h264_mmal) -> h264 (h264_omx)) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help [h264_mmal @ 0x2e097b0] Did not get output frame from MMAL. Error while decoding stream #0:0: Unknown error occurred [h264_mmal @ 0x2e097b0] Changing output format. [h264_omx @ 0x2e28660] Using OMX.broadcom.video_encode:32:22.77 bitrate= -0.0kbits/s speed=N/A Output #0, mp4, to 'test.mp4': Metadata: encoder : Lavf58.28.101 Stream #0:0: Video: h264 (h264_omx) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 1500 kb/s, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc58.53.101 h264_omx Stream #0:1(dan): Audio: mp2 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 384 kb/s [mp4 @ 0x2dcc330] Non-monotonous DTS in output stream 0:0; previous: 0, current: 0; changing to 1. This may result in incorrect timestamps in the output file. Fame= 36 fps= 24 q=-0.0 size= 0kB time=00:00:01.32 bitrate= 0.3kbits/s dup=34 drop=0 speed=0.862x I can't figure this out as it is working on RPi3. I have turned off 4K and analog output and that did't make a change. Also tried with out the flags. So is it me doing something wrong or is it because, that RPi4 has a new Broadcom Video chip and FFMPEG is not ready to use it yet?| |Best ragards RAJensen | ||

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Is it possible to timeout a JPEG dump
by Martijn van Beurden 09 Jul '19

09 Jul '19

Hi all, Currently I have a script running that dumps snapshots from a security camera MJPEG stream with this command ffmpeg -i http://admin:admin@192.168.10.4/channel2 -c:v copy -f image2 -strftime 1 %Y-%m-%dT%H:%M:%S%z.jpg However, in case the network has a dropout for some reason, the connection is broken but FFMPEG hangs. The process isn't stopped (apparently the broken connection is not detected) and there is no way of detecting this. Is there any way to set a timeout between frames arriving or something similar? Console output is this: ffmpeg version N-93674-g1e01f66822 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-27ubuntu1~18.04) configuration: --pkg-config-flags=--static --extra-cflags='-static -static-libstdc++ -static-libgcc -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --extra-ldflags='-static -static-libstdc++ -static-libgcc' --extra-libs='-lm -ldl -lpthread -lz -lrt' --enable-gpl --enable-nonfree --enable-libvorbis --enable-libtheora --enable-libvpx --enable-libopus libavutil 56. 26.100 / 56. 26.100 libavcodec 58. 52.100 / 58. 52.100 libavformat 58. 27.103 / 58. 27.103 libavdevice 58. 7.100 / 58. 7.100 libavfilter 7. 49.100 / 7. 49.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Input #0, mpjpeg, from 'http://admin:admin@192.168.10.4/channel2': Duration: N/A, bitrate: N/A Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc Output #0, image2, to '/srv/camera/snapshots/zuidwest/%Y-%m-%dT%H:%M:%S%z.jpg': Metadata: encoder : Lavf58.27.103 Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help [2.0K blob data] [2.0K blob data] [2.0K blob data] [2.0K blob data] [2.0K blob data] [2.0K blob data] [2.0K blob data]

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