Re: [FFmpeg-user] Programmatically combining audio and video streams

[Lou Logan]

On Thu, May 10, 2018, at 1:04 PM, Philip Prindeville wrote:
> Hi.
> 
> I have a code base that currently expects audio and video to be in the 
> same AVFormatContext, and this works great for sources (typically 
> network connections) that contain both audio and video multiplexed 
> together, such as in MP4 or AVI container.
[...]

This mailing list (ffmpeg-user) is only for questions involving the FFmpeg 
command-line tools (ffmpeg, ffplay, ffprobe). Usage questions involving the 
FFmpeg libraries (libavcodec, libavformat, etc) should be asked at libav-user.

See:

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Re: [FFmpeg-user] ERROR: x265 not found using pkg-config

[Lou Logan]

On Wed, May 9, 2018, at 11:13 AM, Marcus Monroe wrote:
> Marcus Monroe has shared a OneDrive for Business file with you. To view 
> it, click the link below.
> 
> 
> 
> [https://r1.res.office365.com/owa/prem/images/dc-generic_20.png]
> 
> config.log

These links require an account. Please use a host that doesn't require an 
account or just attach config.log to your email.
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[FFmpeg-user] ERROR: x265 not found using pkg-config

[Marcus Monroe]

Marcus Monroe has shared a OneDrive for Business file with you. To view it, 
click the link below.



[https://r1.res.office365.com/owa/prem/images/dc-generic_20.png]

config.log




Hello,


I'm attempting to compile on Ubuntu (16.04) using the instructions from 
http://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu


I'm running into the error mentioned in the subject line when performing the 
ffmpeg steps. I've made sure to install the latest git as suggested by the 
error message and am attaching my config.log.


Any suggestions?


Thanks,


Marcus Monroe
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[FFmpeg-user] Turn off edit lists for dash muxer output

[Bryan Huh]

I've found that when producing dash, fragmented MP4 output, if the moov
atom (init segment) has an edit list in it, browsers are not good about
honoring it during playback. Ideally I can output the dash segments without
writing an edit list. I was hoping I can use the -use_editlist argument and
set it to 0, but that option seems to only be read in by the mov format,
not when using dash.

Modifying the code and forcing -use_editlist to 0 seems to give me what I
want.

1. Is this discouraged (i.e. does it cause problems for certain videos)?
2. Is there a way I can achieve the same thing via the command-line?

I've pasted my command output below (I'm using ffmpeg 2.8).

~/code/messingaround/jl/local> ~/code/ffmpeg/ffmpeg -y -threads 8 -i jl.mov
-t 10 -sn -map 0:0 -map 0:1 -c:v libx264 -force_key_frames
'expr:gte(t,n_forced*5)' -pix_fmt yuv420p -c:a libfdk_aac -ar 44100 -ab
128000 -ac 2 -profile:v:0 high -preset:v:0 superfast -crf:v:0 23
-maxrate:v:0 2000k -bufsize:v:0 2000k -f dash -use_editlist 0
-min_seg_duration 500 -use_timeline 0 file.tmp
ffmpeg version n2.8.14-1-g26755a8c6f Copyright (c) 2000-2018 the FFmpeg
developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration: --prefix=/usr/local --enable-gpl --enable-nonfree
--enable-libfdk-aac --enable-libfreetype --enable-libmp3lame
--enable-libx264 --enable-openssl
  libavutil  54. 31.100 / 54. 31.100
  libavcodec 56. 60.100 / 56. 60.100
  libavformat56. 40.101 / 56. 40.101
  libavdevice56.  4.100 / 56.  4.100
  libavfilter 5. 40.101 /  5. 40.101
  libswscale  3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'jl.mov':
  Metadata:
major_brand : qt
minor_version   : 0
compatible_brands: qt
creation_time   : 2017-10-30 16:39:23
  Duration: 00:01:36.90, start: 0.18, bitrate: 12632 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
640x1136, 12435 kb/s, 33.17 fps, 60 tbr, 60k tbn, 120k tbc (default)
Metadata:
  creation_time   : 2017-10-30 16:39:23
  handler_name: Core Media Data Handler
  encoder : H.264
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 168 kb/s (default)
Metadata:
  creation_time   : 2017-10-30 16:39:23
  handler_name: Core Media Data Handler
[libx264 @ 0x7f8a06803800] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x7f8a06803800] profile High, level 3.2
[libx264 @ 0x7f8a06803800] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC
codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options:
cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12
lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=250 keyint_min=25
scenecut=40 intra_refresh=0 rc_lookahead=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=2000 vbv_bufsize=2000
crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 pb_ratio=1.30 aq=1:1.00
Output #0, dash, to 'file.tmp':
  Metadata:
major_brand : qt
minor_version   : 0
compatible_brands: qt
encoder : Lavf56.40.101
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021),
yuv420p, 640x1136, q=-1--1, max. 2000 kb/s, 60 fps, 15360 tbn, 60 tbc
(default)
Metadata:
  creation_time   : 2017-10-30 16:39:23
  handler_name: Core Media Data Handler
  encoder : Lavc56.60.100 libx264
Stream #0:1(und): Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040),
44100 Hz, stereo, s16, 128 kb/s (default)
Metadata:
  creation_time   : 2017-10-30 16:39:23
  handler_name: Core Media Data Handler
  encoder : Lavc56.60.100 libfdk_aac
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
frame=  600 fps=521 q=-1.0 Lsize=N/A time=00:00:10.01 bitrate=N/A dup=308
drop=0
video:1407kB audio:148kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
[libx264 @ 0x7f8a06803800] frame I:5 Avg QP:10.99  size: 24254
[libx264 @ 0x7f8a06803800] frame P:205   Avg QP:18.58  size:  5533
[libx264 @ 0x7f8a06803800] frame B:390   Avg QP:18.05  size:   473
[libx264 @ 0x7f8a06803800] consecutive B-frames:  1.5% 24.0% 34.5% 40.0%
[libx264 @ 0x7f8a06803800] mb I  I16..4: 65.3% 16.1% 18.6%
[libx264 @ 0x7f8a06803800] mb P  I16..4: 10.4%  3.0%  0.4%  P16..4: 25.6%
0.0%  0.0%  0.0%  0.0%skip:60.6%
[libx264 @ 0x7f8a06803800] mb B  I16..4:  0.4%  0.1%  0.0%  B16..8:  4.4%
0.0%  0.0%  direct: 2.2%  skip:92.9%  L0:21.9% L1:74.6% BI: 3.4%
[libx264 

Re: [FFmpeg-user] VOB files convertion failed

[Jamenson Ferreira Espindula de Almeida Melo]

2018-05-09 16:00 GMT-03:00 Micael Silva :
> On Wed, May 9, 2018 at 2:53 AM, Jamenson Ferreira Espindula de Almeida Melo
>  wrote:
>
>> > Concating VOB files usually goes wrong caused by timecode discontinuities
>> > by the file splitting, I think. You could try to make one single file
>> first
>> > with ffmpeg regenerating PTS before converting to another format. It
>> > generally works for me:
>> >
>> > ffmpeg -fflags +genpts -i
>> > "concat:vts_01_0.vob|vts_01_1.vob|vts_01_2.vob()" -c copy -f vob
>> > filme.mpg
>> >
>> > I am not completely sure but the video_ts.vob carries the DVD menu, it
>> can
>> > be messy putting it among the rest of video, since than menus don't have
>> to
>> > be at same properties of the movie file.
>>
>> Hi, Micael Silva.
>>
>> I tried the command you sugested. The command was:
>>
>>
>> ffmpeg -analyzeduration 500M -probesize 500M -fflags +genpts -i
>> "concat:../vob/vts_01_0.vob|../vob/vts_01_1.vob|../vob/vts_
>> 01_2.vob|../vob/vts_01_3.vob|../vob/vts_01_4.vob|../vob/vts_
>> 02_0.vob|../vob/vts_02_1.vob|../vob/vts_03_1.vob|../vob/vts_
>> 04_1.vob|../vob/vts_05_1.vob"
>> -map 0:1 -map 0:2? -map 0:3? -map 0:4? -map 0:5? -metadata:s:a:0
>> language=eng -metadata:s:a:0 title="English stereo" -metadata:s:a:1
>> language=por -metadata:s:a:1 title="Português estéreo" -metadata:s:s:0
>> language=eng -metadata:s:s:0 title="English" -metadata:s:s:1
>> language=por -metadata:s:s:1 title="Português" -codec:v copy -codec:a
>> copy -codec:s copy -f vob crepusculo.mp4
>>
>>
>> The output os that command was:
>>
>>
>> ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers
>>   built with gcc 7.2.0 (GCC)
>>   configuration: --prefix=/usr --enable-gpl --enable-version3 \
>>   --enable-nonfree --disable-static --enable-shared --disable-debug \
>>   --enable-libass --enable-libfdk-aac --enable-libfreetype \
>>   --enable-libmp3lame --enable-libopus --enable-libtheora \
>>   --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 \
>>   --enable-openssl --docdir=/usr/share/doc/ffmpeg-3.3.3
>>
>>   libavutil  55. 58.100 / 55. 58.100
>>   libavcodec 57. 89.100 / 57. 89.100
>>   libavformat57. 71.100 / 57. 71.100
>>   libavdevice57.  6.100 / 57.  6.100
>>   libavfilter 6. 82.100 /  6. 82.100
>>   libswscale  4.  6.100 /  4.  6.100
>>   libswresample   2.  7.100 /  2.  7.100
>>   libpostproc54.  5.100 / 54.  5.100
>> Input #0, mpeg, from \
>> 'concat:../vob/vts_01_0.vob|../vob/vts_01_1.vob|../vob/vts_
>> 01_2.vob|../vob/vts_01_3.vob|../vob/vts_01_4.vob|../vob/vts_
>> 02_0.vob|../vob/vts_02_1.vob|../vob/vts_03_1.vob|../vob/vts_
>> 04_1.vob|../vob/vts_05_1.vob':
>>
>>   Duration: 00:01:43.71, start: 0.280633, bitrate: 347385 kb/s
>> Stream #0:0[0x1bf]: Data: dvd_nav_packet
>> Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top \
>> first), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k \
>> tbn, 59.94 tbc
>>
>> Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
>> Stream #0:3[0x20]: Subtitle: dvd_subtitle
>> Stream #0:4[0x21]: Subtitle: dvd_subtitle
>> Stream #0:5[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
>> [vob @ 0x18c5ac0] VBV buffer size not set, using default size of 130KB
>> If you want the mpeg file to be compliant to some specification
>> Like DVD, VCD or others, make sure you set the correct buffer size
>> Output #0, vob, to 'crepusculo.mp4':
>>   Metadata:
>> encoder : Lavf57.71.100
>> Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, top first), \
>> 720x480 [SAR 32:27 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 90k \
>> tbn, 29.97 tbc
>>
>> Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
>> Metadata:
>>   title   : English stereo
>> Stream #0:2(eng): Subtitle: dvd_subtitle
>> Metadata:
>>   title   : English
>> Stream #0:3(por): Subtitle: dvd_subtitle
>> Metadata:
>>   title   : Português
>> Stream #0:4(por): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
>> Metadata:
>>   title   : Português estéreo
>> Stream mapping:
>>   Stream #0:1 -> #0:0 (copy)
>>   Stream #0:2 -> #0:1 (copy)
>>   Stream #0:3 -> #0:2 (copy)
>>   Stream #0:4 -> #0:3 (copy)
>>   Stream #0:5 -> #0:4 (copy)
>> Press [q] to stop, [?] for help
>> frame= 7068 fps= 10 q=-1.0 size=   0kB time=00:03:55.76 bitrate=   \
>> 0.0kbits/s speed=0.348x
>>
>> [vob @ 0x18c5ac0] Application provided invalid, non monotonically \
>> increasing dts to muxer in stream 2: 17129112 >= 16543527
>>
>> av_interleaved_write_frame(): Invalid argument
>> frame= 7069 fps=9.6 q=-1.0 Lsize=  181704kB time=00:03:55.81 \
>> bitrate=6312.2kbits/s speed=0.319x
>>
>> video:174046kB audio:5395kB subtitle:22kB other streams:0kB global \
>> headers:0kB muxing overhead: 1.249032%
>>
>> Conversion failed!
>>
>>
>> Any idea?
>>
>> Thank you in advance.
>>
>> God 

Re: [FFmpeg-user] easy question

[Good Developer]

Thanks for reply Denis. I tried it with -re option already. I get even worse 
distortion.

> On May 10, 2018, at 5:11 PM, Dennis Mungai  wrote:
> 
> Retry with the rstream option:
> 
> ffmpeg -re -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v copy -f
> segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 result%d.mp4
> 
> 
> On 11 May 2018 at 00:00, Good Developer 
> wrote:
> 
>> I hope it is an easy question for someone who came across this issue.
>> I am recording a video from an ip camera. The video stream comes in h264
>> format and there is no audio stream. In order to save cpu, I am not
>> decoding and then re encoding it back to h264, I just copy it. The problem
>> is that a resulting video sometimes comes distorted. Here is a simple
>> command that I am using:
>> 
>> ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v copy -f
>> segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 result%d.mp4
>> 
>> 
>> Also, for your information, there is no problem if I encode the video to
>> h264, but I am trying to avoid this for saving cpu time:
>> 
>> 
>> ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v libx264
>> -b:v
>> 512K -pix_fmt yuv420p -g 60 -f segment -segment_time 60 -segment_wrap 10
>> -reset_timestamps 1 result%d.mp4
>> 
>> 
>> Can someone point me in a right direction please?
>> ___
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Re: [FFmpeg-user] easy question

[Dennis Mungai]

Retry with the rstream option:

ffmpeg -re -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v copy -f
segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 result%d.mp4


On 11 May 2018 at 00:00, Good Developer 
wrote:

> I hope it is an easy question for someone who came across this issue.
> I am recording a video from an ip camera. The video stream comes in h264
> format and there is no audio stream. In order to save cpu, I am not
> decoding and then re encoding it back to h264, I just copy it. The problem
> is that a resulting video sometimes comes distorted. Here is a simple
> command that I am using:
>
> ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v copy -f
> segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 result%d.mp4
>
>
> Also, for your information, there is no problem if I encode the video to
> h264, but I am trying to avoid this for saving cpu time:
>
>
> ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v libx264
> -b:v
> 512K -pix_fmt yuv420p -g 60 -f segment -segment_time 60 -segment_wrap 10
> -reset_timestamps 1 result%d.mp4
>
>
> Can someone point me in a right direction please?
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[FFmpeg-user] easy question

[Good Developer]

I hope it is an easy question for someone who came across this issue.
I am recording a video from an ip camera. The video stream comes in h264
format and there is no audio stream. In order to save cpu, I am not
decoding and then re encoding it back to h264, I just copy it. The problem
is that a resulting video sometimes comes distorted. Here is a simple
command that I am using:

ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v copy -f
segment -segment_time 60 -segment_wrap 10 -reset_timestamps 1 result%d.mp4


Also, for your information, there is no problem if I encode the video to
h264, but I am trying to avoid this for saving cpu time:


ffmpeg -i rtsp://admin:admin@192.168.1.234/ch0_0.h264 -an -c:v libx264 -b:v
512K -pix_fmt yuv420p -g 60 -f segment -segment_time 60 -segment_wrap 10
-reset_timestamps 1 result%d.mp4


Can someone point me in a right direction please?
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[FFmpeg-user] Programmatically combining audio and video streams

[Philip Prindeville]

Hi.

I have a code base that currently expects audio and video to be in the same 
AVFormatContext, and this works great for sources (typically network 
connections) that contain both audio and video multiplexed together, such as in 
MP4 or AVI container.

I’m trying to get the same code to work with separate containers for audio and 
video, such as youtube Webm URLs for separate audio and video.

I don’t want to have to rewrite a lot of the existing code.

I was wondering if it would be reasonably straightforward (say 100 lines of 
code or less) to write a function that combines two separate AVFormatContexts 
into a new composite AVFormatContext containing 2 streams (the component 
streams of the 2 donor AVFormatContexts).

This is, as I said, using network connections so data will be arriving 
asynchronously, i.e. with respect to the 2 connections possibly being 
out-of-phase and they’ll need to be synchronized (wrt buffering) so that 
matching PTS’s can be read out of both streams… but also the data will be 
arriving willy-nilly, in arbitrary chunks that don’t correspond to frame or 
(high-level) packet boundaries.

The implication being that just because a socket has data on it ready to read, 
doesn’t mean it’s enough to form a complete packet, and hence a call to 
av_read_packet() might block (or more accurately, keep calling the 
read_packet() handler until it’s acquired enough data).  This is not friendly 
to single-threading… so the only way I can think to do this is to have one 
thread per connection, have them each call av_read_packet() for their 
respective connections, and then synchronize on their respective timecodes.

Kind of ugly.

I’m reading from buffers where I know how much data is in each connection’s 
buffer, but not necessarily how much data is required to read a full packet, 
for instance.  (If I were reading from a file where all the data were already 
present, this would be trivial because av_packet_read() would never block.)

I figure this must be a fairly common operation to do, so someone must have 
figured out a reasonable approach.

Ideally I’d like the two combined connections on the same AVFormatConnection so 
my existing code could be convinced it’s reading from a single connection.

But if that’s not feasible, whatever requires the least amount of restructuring 
of the existing code (or maybe just the least overall complexity) would be 
great.

Pointers to snippets of code that I could leverage would be great!  I was 
looking at doc/examples/remuxing.c but couldn’t figure out how to add more 
streams to an existing output AVFormatContext, etc.

Thanks,

-Philip

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Re: [FFmpeg-user] C210 uncompressed video: horizontal offset

[Carl Eugen Hoyos]

2018-05-08 14:06 GMT+02:00, Peter B. :
> On 08/05/18 00:31, Carl Eugen Hoyos wrote:
>> 2018-05-07 23:39 GMT+02:00, Peter B. :
>>
>>> http://download.das-werkstatt.com/pb/contribs/files/c210.avi.7z
>> This file was written using libavformat which does not support
>> writing Canopus C210, please provide (the beginning of) the
>> original file.
>
> Roger that.
> You got me there ;)
> I admit I trimmed the file using ffmpeg (hoping it wouldn't matter due
> to "-c copy").
>
> Anyways, here's a dd-trimmed file containing the first 20 MB of the
> original:
> http://download.das-werkstatt.com/pb/contribs/files/c210-dd.avi.7z

Piotr kindly confirmed that the file is valid, I sent a patch that
skips the unknown extradata.

Is is possible that we talked about file(s) with changing codecs
that you wanted to forward?

Thank you, Carl Eugen
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[FFmpeg-user] Get a duration of HLS Live stream using FFmpeg

[m.kamalasubha m.kamalasubha]

Hello all,
How to get a duration of the HLS Live stream which doesn't
have  #EXT-X-ENDLIST token using FFmpeg?
Thanks in advance...
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Re: [FFmpeg-user] Not able to open URL using avformat_open_input

[m.kamalasubha m.kamalasubha]

Thanks Moritz.
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