February 2015 - ffmpeg-user - lists.ffmpeg.org

How to add EIA-608/EIA-708 Closed Caption from a srt file
by loeffler＠eyetrap.net 27 Feb '15

27 Feb '15

Hello, I am relatively new to ffmpeg and I am tasked with encoding H264 Video into an MPEG-2 Transport Stream. That video part I managed to get right. Now I need to also add Closed Caption to it in EIA-608/EIA-708 format. I have a separate .srt file but I am unable to identify the correct commands to use. Thanks for your help Markus

2 1

Output file empty when processing mp4 - Invalid data found when processing input
by Peter Wood 26 Feb '15

26 Feb '15

Hi Folks, I'm trying to resize an mp4 file using ffmpeg, but the output file comes out empty. I see the following messages just before the command finishes: Truncating packet of size 103333 to 101557 time=00:00:06.10 bitrate= 585.7kbits/s [h264 @ 0x20646aa0] AVC: nal size 103329 Last message repeated 1 times [h264 @ 0x20646aa0] no frame! [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1ff19240] stream 0, offset 0x200ed8: partial file /data/sftp/video/temp/video_promo/764556_4_p.mp4: Invalid data found when processing input Any pointers on how to track down what's causing this? You can see the full output of the command below, followed by the output of ffprobe. The only alterations are a few pieces of sensitive data that I've removed which shouldn't have any bearing on diagnosing the issue. Thanks, Peter ffmpeg version N-45171-gae77266-syslint Copyright (c) 2000-2012 the FFmpeg developers built on Oct 8 2012 14:14:21 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52) configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint libavutil 51. 74.100 / 51. 74.100 libavcodec 54. 65.100 / 54. 65.100 libavformat 54. 30.100 / 54. 30.100 libavdevice 54. 3.100 / 54. 3.100 libavfilter 3. 19.102 / 3. 19.102 libswscale 2. 1.101 / 2. 1.101 libswresample 0. 16.100 / 0. 16.100 libpostproc 52. 1.100 / 52. 1.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '764556_4_p.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 creation_time : 2013-01-10 18:15:24 title : xxxx Duration: 00:09:10.95, start: 0.000000, bitrate: 30 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x704, 1895 kb/s, 29.97 fps, 29.97 tbr, 60k tbn, 59.94 tbc Metadata: creation_time : 1970-01-01 00:00:00 handler_name : VideoHandler Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 192 kb/s Metadata: creation_time : 2013-01-10 18:15:24 handler_name : IsoMedia File Produced by Google, 5-11-2011 [libx264 @ 0x1ff16720] using cpu capabilities: none! [libx264 @ 0x1ff16720] profile Main, level 3.0 [libx264 @ 0x1ff16720] 264 - core 128 r2216 198a7ea - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0 me=dia subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=2 lookahead_threads=1 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=10 qpmax=51 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to '764556_4_P_temp.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 title : xxxxxx encoder : Lavf54.30.100 Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 720x406, q=10-51, pass 1, 512 kb/s, 30k tbn, 29.97 tbc Metadata: creation_time : 1970-01-01 00:00:00 handler_name : VideoHandler Stream mapping: Stream #0:0 -> #0:0 (h264 -> libx264) Press [q] to stop, [?] for help Truncating packet of size 103333 to 101557 time=00:00:06.10 bitrate= 585.7kbits/s [h264 @ 0x20646aa0] AVC: nal size 103329 Last message repeated 1 times [h264 @ 0x20646aa0] no frame! [mov,mp4,m4a,3gp,3g2,mj2 @ 0x1ff19240] stream 0, offset 0x200ed8: partial file 764556_4_p.mp4: Invalid data found when processing input frame= 270 fps= 79 q=-1.0 Lsize= 610kB time=00:00:08.94 bitrate= 558.8kbits/s video:606kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.616142% [libx264 @ 0x1ff16720] frame I:2 Avg QP:18.48 size: 52856 [libx264 @ 0x1ff16720] frame P:104 Avg QP:21.64 size: 4429 [libx264 @ 0x1ff16720] frame B:164 Avg QP:26.99 size: 328 [libx264 @ 0x1ff16720] consecutive B-frames: 16.7% 2.2% 14.4% 66.7% [libx264 @ 0x1ff16720] mb I I16..4: 52.4% 0.0% 47.6% [libx264 @ 0x1ff16720] mb P I16..4: 0.8% 0.0% 0.0% P16..4: 27.9% 0.0% 0.0% 0.0% 0.0% skip:71.4% [libx264 @ 0x1ff16720] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 4.4% 0.0% 0.0% direct: 2.1% skip:93.5% L0:18.8% L1:34.6% BI:46.5% [libx264 @ 0x1ff16720] final ratefactor: 20.43 [libx264 @ 0x1ff16720] coded y,uvDC,uvAC intra: 41.6% 48.0% 43.9% inter: 6.3% 6.9% 2.7% [libx264 @ 0x1ff16720] i16 v,h,dc,p: 68% 24% 7% 2% [libx264 @ 0x1ff16720] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 27% 26% 10% 3% 8% 6% 5% 7% 8% [libx264 @ 0x1ff16720] i8c dc,h,v,p: 54% 23% 18% 4% [libx264 @ 0x1ff16720] Weighted P-Frames: Y:11.5% UV:6.7% [libx264 @ 0x1ff16720] kb/s:550.62 FFprobe version 0.6.1, Copyright (c) 2007-2010 the FFmpeg developers built on Dec 4 2010 15:35:31 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48) configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab libavutil 50.15. 1 / 50.15. 1 libavcodec 52.72. 2 / 52.72. 2 libavformat 52.64. 2 / 52.64. 2 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.19. 0 / 1.19. 0 libswscale 0.11. 0 / 0.11. 0 libpostproc 51. 2. 0 / 51. 2. 0 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '764556_4_p.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 title : xxxxxxx Duration: 00:09:10.95, start: 0.000000, bitrate: 30 kb/s Stream #0.0(und): Video: h264, yuv420p, 1280x704, 1895 kb/s, 29.97 fps, 29.97 tbr, 60k tbn, 59.94 tbc Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 192 kb/s

4 3

Splitting TS files
by Benjamin Rapaport 26 Feb '15

26 Feb '15

I have an HLS m3u8 playlist and corresponding TS files. Given a timestamp, I would like to find the TS file that contains that timestamp, and then split that TS file into two parts as close to that timestamp as possible, either at a keyframe or possibly by forcing a new keyframe where I want to split. The split files need to play back in the HLS stream as seamlessly as if I had not made the split. I will be adding a discontinuity tag in the HLS between the two new TS files as there could be another stream inserted there during playback. Again, the playback in this case needs to be seamless as well. Is this something that I can accomplish with ffmpeg?

1 0

R128 ebur128 filter only for 48kHz?
by Christoph Gerstbauer 26 Feb '15

26 Feb '15

Hello, I am testing the ebur128 filter in FFmpeg. It works very well. BUT: While my recherche I found this document from 2013 https://tech.ebu.ch/docs/events/opensource13/presentations/open-source-loud… On page 18 there is the information that the ebur128 filter is only implemented for 48kHz sampling rate and that other input sampling rates must be resampled. What is the actual state of the ebur128 filter? Is just 48kHz still implemented or are there more sampling rates implemented since 2013? Best Regards Christoph

4 6

video accelerator support for Freescale Cortexa8
by ian c 26 Feb '15

26 Feb '15

Hello Expert, I am doing research about ffmpeg video accelerator support for Cortex A8 (especially for the Freescale). So far what I have read from a certain forum dated 2012 that ffmpeg will support only for Nvidia and Intel video accelerator. I would to know if this is still true today? I would appreciate for any reply on this query. Regards,Ian

1 0

How to identify intra DC precision with FFprobe
by Wesley Wen 25 Feb '15

25 Feb '15

Hi, I'm not sure if it's a valid question. We're asking our partner to deliver MPEG-2 video content with intra DC precision set to 10-bit. Is it possible to use FFprobe command to double check it? Thanks, Wesley

2 1

Video resizing and cropping using ffmpeg commands in Android
by Manjunath Betadur 25 Feb '15

25 Feb '15

I have a 1080p video (1080x1920 pixels, mp4 format) and I want to convert it to 480x480 pixels video. For this, I want to scale 1080p video to 480p (width=480, height=any value based on the aspect ratio) and then crop it to 480x480 (cropping the bottom pixels of the frames) Following are the ffmpeg commands I am using for scaling and cropping an mp4 video : For scaling, ffmpeg -y -i /sdcard/testing1.mp4 -vf "scale=480:-1" -threads 5 -preset ultrafast -strict -2 /sdcard/testing2.mp4 scaling issue : The output is 270x480 (I don't know why it is not fixing width as 480 pixels) solution : I used following command, ffmpeg -y -i /sdcard/testing1.mp4 -vf "scale=480:480" -threads 5 -preset ultrafast -strict -2 /sdcard/testing2.mp4 gave me output as 480x853 which is fine according to my requirements. For cropping, ffmpeg -y -i /sdcard/testing1.mp4 -vf "crop=480:480:0:0" -threads 5 -preset ultrafast -strict -2 /sdcard/testing2.mp4 Individually, both will work fine. But, I want to run a single command to do both scaling & cropping. I tried following command and it doesn't work. ffmpeg -y -i /sdcard/testing1.mp4 -vf "scale=480:480, crop=480:480:0:0" -threads 5 -preset ultrafast -strict -2 /sdcard/testing2.mp4 Any suggestion is appreciated.

1 0

configure made a mistake
by Denis Pozharskiy 24 Feb '15

24 Feb '15

Hi, I got the mistake described below when try to configure the latest version of ffmpeg on my MacBook Pro (Yosemite 10.10.2 (14C109)) Deniss-MacBook-Pro:ffmpeg denis$ ./configure Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1 Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1 Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1 Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1 Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/c++/4.2.1 yasm/nasm not found or too old. Use --disable-yasm for a crippled build. --------------- With Regards Denis Pozharskiy

3 3

Record from webcam. Record video only is OK. Record video and audio fails.
by Thomas Seilund 24 Feb '15

24 Feb '15

Hi All, I record from a Logitech HD Pro C920 webcam. Case 1 below If I record video only then the play back is ok Case 2 below If I record video and audio then the play back runs way to fast. Case 3 below If I record audio only then the play back is ok. Case 1: tps@t420:~/temp$ ffmpeg -y -f v4l2 -r 24 -s 640x360 -i /dev/video1 -c:v libx264 -preset ultrafast -pix_fmt yuv420p -r 24 -f mpegts test.ts ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg developers built on Jan 24 2015 11:51:09 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable- libx264 --enable-version3 --enable-libvorbis --enable-x11grab --enable- libfreetype --enable-libv4l2 --enable-libfdk-aac --enable-nonfree libavutil 54. 17.100 / 54. 17.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 19.100 / 56. 19.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 8.101 / 5. 8.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, video4linux2,v4l2, from '/dev/video1': Duration: N/A, start: 2169.388421, bitrate: 88473 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x360, 88473 kb/s, 24 fps, 24 tbr, 1000k tbn, 1000k tbc [libx264 @ 0x2f1ad60] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [libx264 @ 0x2f1ad60] profile Constrained Baseline, level 3.0 Output #0, mpegts, to 'test.ts': Metadata: encoder : Lavf56.19.100 Stream #0:0: Video: h264 (libx264), yuv420p, 640x360, q=-1--1, 24 fps, 90k tbn, 24 tbc Metadata: encoder : Lavc56.20.100 libx264 Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Press [q] to stop, [?] for help frame= 145 fps= 24 q=-1.0 Lsize= 649kB time=00:00:06.04 bitrate= 880.0kbits/s video:585kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 10.890488% [libx264 @ 0x2f1ad60] frame I:1 Avg QP:20.00 size: 26181 [libx264 @ 0x2f1ad60] frame P:144 Avg QP:21.94 size: 3980 [libx264 @ 0x2f1ad60] mb I I16..4: 100.0% 0.0% 0.0% [libx264 @ 0x2f1ad60] mb P I16..4: 4.7% 0.0% 0.0% P16..4: 34.5% 0.0% 0.0% 0.0% 0.0% skip:60.8% [libx264 @ 0x2f1ad60] coded y,uvDC,uvAC intra: 46.1% 56.4% 26.0% inter: 17.2% 14.2% 1.8% [libx264 @ 0x2f1ad60] i16 v,h,dc,p: 34% 20% 24% 21% [libx264 @ 0x2f1ad60] i8c dc,h,v,p: 47% 21% 21% 11% [libx264 @ 0x2f1ad60] kb/s:793.57 tps@t420:~/temp$ Case 2 tps@t420:~/temp$ ffmpeg -y -f v4l2 -r 24 -s 640x360 -i /dev/video1 -f alsa - ac 2 -i plughw:CARD=C920,DEV=0 -c:v libx264 -pix_fmt yuv420p -preset ultrafast -r 24 -c:a aac -b:a 128k -ar 44100 -strict -2 -f mpegts test2.ts ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg developers built on Jan 24 2015 11:51:09 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable- libx264 --enable-version3 --enable-libvorbis --enable-x11grab --enable- libfreetype --enable-libv4l2 --enable-libfdk-aac --enable-nonfree libavutil 54. 17.100 / 54. 17.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 19.100 / 56. 19.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 8.101 / 5. 8.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, video4linux2,v4l2, from '/dev/video1': Duration: N/A, start: 2284.037947, bitrate: 88473 kb/s Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x360, 88473 kb/s, 24 fps, 24 tbr, 1000k tbn, 1000k tbc Guessed Channel Layout for Input Stream #1.0 : stereo Input #1, alsa, from 'plughw:CARD=C920,DEV=0': Duration: N/A, start: 1424795325.310924, bitrate: 1536 kb/s Stream #1:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s [libx264 @ 0x2d63700] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [libx264 @ 0x2d63700] profile Constrained Baseline, level 3.0 Output #0, mpegts, to 'test2.ts': Metadata: encoder : Lavf56.19.100 Stream #0:0: Video: h264 (libx264), yuv420p, 640x360, q=-1--1, 24 fps, 90k tbn, 24 tbc Metadata: encoder : Lavc56.20.100 libx264 Stream #0:1: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc56.20.100 aac Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help [alsa @ 0x2d4eda0] ALSA buffer xrun. 215kB time=00:00:02.83 bitrate= 621.1kbits/s [aac @ 0x2d64660] Queue input is backward in time [mpegts @ 0x2d663c0] Non-monotonous DTS in output stream 0:1; previous: 345216, current: 289871; changing to 345217. This may result in incorrect timestamps in the output file. [mpegts @ 0x2d663c0] Non-monotonous DTS in output stream 0:1; previous: 345217, current: 322492; changing to 345218. This may result in incorrect timestamps in the output file. frame= 120 fps= 24 q=-1.0 Lsize= 348kB time=00:00:05.62 bitrate= 507.7kbits/s video:299kB audio:9kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 13.187988% [libx264 @ 0x2d63700] frame I:1 Avg QP:20.00 size: 25293 [libx264 @ 0x2d63700] frame P:119 Avg QP:20.86 size: 2362 [libx264 @ 0x2d63700] mb I I16..4: 100.0% 0.0% 0.0% [libx264 @ 0x2d63700] mb P I16..4: 1.7% 0.0% 0.0% P16..4: 37.3% 0.0% 0.0% 0.0% 0.0% skip:61.0% [libx264 @ 0x2d63700] coded y,uvDC,uvAC intra: 25.1% 54.6% 19.6% inter: 13.5% 14.3% 0.9% [libx264 @ 0x2d63700] i16 v,h,dc,p: 39% 19% 22% 20% [libx264 @ 0x2d63700] i8c dc,h,v,p: 52% 19% 19% 10% [libx264 @ 0x2d63700] kb/s:490.15 tps@t420:~/temp$ Case 3 tps@t420:~/temp$ ffmpeg -y -f alsa -ac 2 -i plughw:CARD=C920,DEV=0 -c:a aac -b:a 128k -ar 44100 -strict -2 -f mpegts test3.tsffmpeg version N-69238- g2699a37 Copyright (c) 2000-2015 the FFmpeg developers built on Jan 24 2015 11:51:09 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable- libx264 --enable-version3 --enable-libvorbis --enable-x11grab --enable- libfreetype --enable-libv4l2 --enable-libfdk-aac --enable-nonfree libavutil 54. 17.100 / 54. 17.100 libavcodec 56. 20.100 / 56. 20.100 libavformat 56. 19.100 / 56. 19.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 8.101 / 5. 8.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from 'plughw:CARD=C920,DEV=0': Duration: N/A, start: 1424796027.558246, bitrate: 1536 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Output #0, mpegts, to 'test3.ts': Metadata: encoder : Lavf56.19.100 Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc56.20.100 aac Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native)) Press [q] to stop, [?] for help size= 106kB time=00:00:05.97 bitrate= 145.9kbits/s video:0kB audio:93kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 14.524582% tps@t420:~/temp$ Thanks Thomas S

1 1

Raspberry Pi Audio Stream Stopping
by Jon Krake 24 Feb '15

24 Feb '15

So I am using a raspberry pi to encode audio from USB sound card's Line In and broadcasting to a multicast address as an MP3. I ran tests on a laptop before I migrated it to a pi, and it seemed to run without issue. Now when I run it on the pi, it will run for about 4 or 5 hours, then the ffmpeg encoder(I think) will stop. When I check on the program after a few hours, I find that sox is still recording, but ffmpeg has stopped encoding. I have tried this with both arecord and sox, and with both the raspbian repo avconv and the real ffmpeg compiled from source. I am figuring that it has something to do with the limited resources on the pi, but I'm not sure. Any thoughts would be appreciated. Thanks in advance. The command I am running is as follows: *rec -b 16 -r 48000 -c 2 -t wav - | FFREPORT=file=ffreport.log:level=48 ffmpeg -i - -acodec libmp3lame -ab 320k -ac 1 -f rtp rtp://234.5.5.6:1234 <http://234.5.5.6:1234>* The report log is below: ffmpeg started on 2015-02-24 at 03:27:09 Report written to "ffreport.log" Command line: ffmpeg -i - -acodec libmp3lame -ab 320k -ac 1 -f rtp rtp://234.5.5.6:1234 ffmpeg version N-70050-g03f39fb Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.6 (Debian 4.6.3-14+rpi1) configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --enable-libmp3lame libavutil 54. 19.100 / 54. 19.100 libavcodec 56. 25.100 / 56. 25.100 libavformat 56. 23.100 / 56. 23.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 11.100 / 5. 11.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Splitting the commandline. Reading option '-i' ... matched as input file with argument '-'. Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'libmp3lame'. Reading option '-ab' ... matched as option 'ab' (audio bitrate (please use -b:a)) with argument '320k'. Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '1'. Reading option '-f' ... matched as option 'f' (force format) with argument 'rtp'. Reading option 'rtp://234.5.5.6:1234' ... matched as output file. Finished splitting the commandline. Parsing a group of options: global . Successfully parsed a group of options. Parsing a group of options: input file -. Successfully parsed a group of options. Opening an input file: -. [wav @ 0x2077600] Format wav probed with size=2048 and score=99 [wav @ 0x2077600] Before avformat_find_stream_info() pos: 44 bytes read:4096 seeks:0 [wav @ 0x2077600] parser not found for codec pcm_s16le, packets or times may be invalid. [wav @ 0x2077600] probing stream 0 pp:14 [wav @ 0x2077600] probing stream 0 pp:13 [wav @ 0x2077600] probing stream 0 pp:12 [wav @ 0x2077600] probing stream 0 pp:11 [wav @ 0x2077600] probing stream 0 pp:10 [wav @ 0x2077600] probing stream 0 pp:9 [wav @ 0x2077600] probing stream 0 pp:8 [wav @ 0x2077600] probing stream 0 pp:7 [wav @ 0x2077600] probing stream 0 pp:6 [wav @ 0x2077600] probing stream 0 pp:5 [wav @ 0x2077600] probing stream 0 pp:4 [wav @ 0x2077600] probing stream 0 pp:3 [wav @ 0x2077600] probing stream 0 pp:2 [wav @ 0x2077600] probing stream 0 pp:1 [wav @ 0x2077600] probed stream 0 [wav @ 0x2077600] parser not found for codec pcm_s16le, packets or times may be invalid. [wav @ 0x2077600] All info found [wav @ 0x2077600] After avformat_find_stream_info() pos: 204844 bytes read:212992 seeks:0 frames:50 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, wav, from 'pipe:': Duration: N/A, bitrate: 1536 kb/s Stream #0:0, 50, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2 channels, s16, 1536 kb/s Successfully opened the file. Parsing a group of options: output file rtp://234.5.5.6:1234. Applying option acodec (force audio codec ('copy' to copy stream)) with argument libmp3lame. Applying option ab (audio bitrate (please use -b:a)) with argument 320k. Applying option ac (set number of audio channels) with argument 1. Applying option f (force format) with argument rtp. Successfully parsed a group of options. Opening an output file: rtp://234.5.5.6:1234. Successfully opened the file. detected 1 logical cores [graph 0 input from stream 0:0 @ 0x2076ee0] Setting 'time_base' to value '1/48000' [graph 0 input from stream 0:0 @ 0x2076ee0] Setting 'sample_rate' to value '48000' [graph 0 input from stream 0:0 @ 0x2076ee0] Setting 'sample_fmt' to value 's16' [graph 0 input from stream 0:0 @ 0x2076ee0] Setting 'channel_layout' to value '0x3' [graph 0 input from stream 0:0 @ 0x2076ee0] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3 [audio format for output stream 0:0 @ 0x206fba0] Setting 'sample_fmts' to value 's32p|fltp|s16p' [audio format for output stream 0:0 @ 0x206fba0] Setting 'sample_rates' to value '44100|48000|32000|22050|24000|16000|11025|12000|8000' [audio format for output stream 0:0 @ 0x206fba0] Setting 'channel_layouts' to value '0x4' [audio format for output stream 0:0 @ 0x206fba0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0' [AVFilterGraph @ 0x2077230] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed 0.500000 0.500000 [auto-inserted resampler 0 @ 0x20708a0] ch:2 chl:stereo fmt:s16 r:48000Hz -> ch:1 chl:mono fmt:s16p r:48000Hz Output #0, rtp, to 'rtp://234.5.5.6:1234': Metadata: encoder : Lavf56.23.100 Stream #0:0, 0, 1/90000: Audio: mp3 (libmp3lame), 48000 Hz, mono, s16p, 320 kb/s Metadata: encoder : Lavc56.25.100 libmp3lame Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame)) size= 56kB time=00:00:01.41 bitrate= 325.3kbits/s size= 83kB time=00:00:02.08 bitrate= 325.3kbits/s size= 103kB time=00:00:02.59 bitrate= 325.3kbits/s size= 123kB time=00:00:03.09 bitrate= 325.3kbits/s size= 143kB time=00:00:03.60 bitrate= 325.3kbits/s . . . size= 443979kB time=03:06:18.00 bitrate= 325.4kbits/s size= 444000kB time=03:06:18.52 bitrate= 325.4kbits/s size= 444020kB time=03:06:19.03 bitrate= 325.4kbits/s size= 444040kB time=03:06:19.53 bitrate= 325.4kbits/s size= 444061kB time=03:06:20.06 bitrate= 325.4kbits/s size= 444081kB time=03:06:20.56 bitrate= 325.4kbits/s size= 444101kB time=03:06:21.07 bitrate= 325.4kbits/s size= 444122kB time=03:06:21.60 bitrate= 325.4kbits/s size= 444142kB time=03:06:22.10 bitrate= 325.4kbits/s size= 444162kB time=03:06:22.60 bitrate= 325.4kbits/s size= 444183kB time=03:06:23.13 bitrate= 325.4kbits/s size= 444203kB time=03:06:23.64 bitrate= 325.4kbits/s size= 444223kB time=03:06:24.14 bitrate= 325.4kbits/s size= 444244kB time=03:06:24.67 bitrate= 325.4kbits/s [libmp3lame @ 0x20b6e30] Trying to remove 47 more samples than there are in the queue size= 444248kB time=03:06:24.76 bitrate= 325.4kbits/s video:0kB audio:436906kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.680361% Input file #0 (pipe:): Input stream #0:0 (audio): 524287 packets read (2147479552 bytes); 524287 frames decoded (536869888 samples); Total: 524287 packets (2147479552 bytes) demuxed Output file #0 (rtp:// 234.5.5.6:1234): Output stream #0:0 (audio): 466032 frames encoded (536868864 samples); 466033 packets muxed (447391680 bytes); Total: 466033 packets (447391680 bytes) muxed 524287 frames successfully decoded, 0 decoding errors [AVIOContext @ 0x20d7f10] Statistics: 0 seeks, 468255 writeouts [AVIOContext @ 0x2077080] Statistics: 8899084332 bytes read, 0 seeks Received signal 2: terminating.

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