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Autres articles (40)
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Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...) -
List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
Sur d’autres sites (6043)
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Send AVPacket over Network
2 décembre 2019, par YondonatorI’m generating AVPackets with an encoder with ffmpeg and now I want to send them with UDP to another Computer and show them there.
The problem is I don’t know how to convert the packet to bytes and back. I tried this to copy the package :AVPacket newPacket = avcodec.av_packet_alloc();
ByteBuffer byteBuffer = packet.buf().buffer().asByteBuffer();
int bufferSize = byteBuffer.capacity();
byte bytes[] = new byte[bufferSize];
byteBuffer.get(bytes);
AVBufferRef newBufferRef = avutil.av_buffer_alloc(bufferSize);
newBufferRef.data(new BytePointer(bytes));
newPacket.buf(newBufferRef);
ByteBuffer dataBuffer = packet.data().asByteBuffer();
int dataSize = dataBuffer.capacity();
byte dataBytes[] = new byte[dataSize];
dataBuffer.get(dataBytes);
BytePointer dataPointer = new BytePointer(dataBytes);
newPacket.data(dataPointer);
newPacket.dts(packet.dts());
newPacket.duration(packet.duration());
newPacket.flags(packet.flags());
newPacket.pos(packet.pos());
newPacket.pts(packet.pts());
newPacket.side_data_elems(0);
newPacket.size(packet.size());
newPacket.stream_index(packet.stream_index());
videoPlayer.sendPacket(newPacket);This gives me this Error :
[h264 @ 0000018951be8440] Invalid NAL unit size (3290676 > 77).
[h264 @ 0000018951be8440] Error splitting the input into NAL units.
[h264 @ 0000018951bf6480] Invalid NAL unit size (15305314 > 163).
[h264 @ 0000018951bf6480] Error splitting the input into NAL units.The problem is
newPacket.data(). When I set it directly :newPacket.data(packet.data())
it works. Alsopacket.data().asByteBuffer().capacity()returns 1 andpacket.data().capacity()returns 0.This is my method that creates the decoder :
private void startUnsafe() throws Exception
{
int result;
convertContext = null;
codec = null;
codecContext = null;
AVFrame = null;
RGBAVFrame = null;
frame = new Frame();
codec = avcodec_find_decoder(codecID);
if(codec == null)
{
throw new Exception("Unable to find decoder");
}
codecContext = avcodec_alloc_context3(codec);
if(codecContext == null)
{
releaseUnsafe();
throw new Exception("Unable to alloc codec context!");
}
AVCodecParameters para = avcodec_parameters_alloc();
para.bit_rate(streamBitrate);
para.width(streamWidth);
para.height(streamHeight);
para.codec_id(codecID);
para.codec_type(AVMEDIA_TYPE_VIDEO);
try
{
byte extradataByte[] = Files.readAllBytes(new File("extradata.byte").toPath());
para.extradata(new BytePointer(extradataByte));
para.extradata_size(extradataByte.length);
}
catch (IOException e1)
{
e1.printStackTrace();
throw new Exception("extradata file not available");
}
result = avcodec_parameters_to_context(codecContext, para);
if(result < 0)
{
throw new Exception("Unable to copy parameters to context! [" + result + "]");
}
codecContext.thread_count(0);
result = avcodec_open2(codecContext, codec, new AVDictionary());
if(result < 0)
{
releaseUnsafe();
throw new Exception("Unable to open codec context![" + result + "]");
}
AVFrame = av_frame_alloc();
if(AVFrame == null)
{
releaseUnsafe();
throw new Exception("Unable to alloc AVFrame!");
}
RGBAVFrame = av_frame_alloc();
if(RGBAVFrame == null)
{
releaseUnsafe();
throw new Exception("Unable to alloc AVFrame!");
}
initRGBAVFrame();
TimerTask task = new TimerTask() {
@Override
public void run()
{
timerTask();
}
};
timer = new Timer();
timer.scheduleAtFixedRate(task, 0, (long) (1000/streamFramerateDouble));
window.setVisible(true);
}The file extradata.byte has some bytes that I got from another video, because without them it doesn’t work too.
EDIT :
package org.stratostream.streaming;
import java.nio.ByteBuffer;
import org.bytedeco.javacpp.BytePointer;
import org.bytedeco.javacpp.Pointer;
import org.bytedeco.javacpp.avcodec;
import org.bytedeco.javacpp.avutil;
import org.bytedeco.javacpp.avcodec.AVPacket;
import org.bytedeco.javacpp.avcodec.AVPacketSideData;
public class PacketIO {
public static final int SIDE_DATA_FIELD = 0;
public static final int SIDE_ELEMENTS_FIELD = 4;
public static final int SIDE_TYPE_FIELD = 8;
public static final int DTS_FIELD = 12;
public static final int PTS_FIELD = 20;
public static final int FLAGS_FIELD = 28;
public static final int DATA_OFFSET = 32;
public static byte[] toByte(AVPacket packet) throws Exception
{
int dataSize = packet.size();
ByteBuffer dataBuffer = packet.data().capacity(dataSize).asByteBuffer();
byte dataBytes[] = new byte[dataSize];
dataBuffer.get(dataBytes);
AVPacketSideData sideData = packet.side_data();
int sideSize = sideData.size();
ByteBuffer sideBuffer = sideData.data().capacity(sideSize).asByteBuffer();
byte sideBytes[] = new byte[sideSize];
sideBuffer.get(sideBytes);
int sideOffset = DATA_OFFSET + dataSize;
int resultSize = sideOffset + sideSize;
byte resultBytes[] = new byte[resultSize];
System.arraycopy(dataBytes, 0, resultBytes, DATA_OFFSET, dataSize);
System.arraycopy(sideBytes, 0, resultBytes, sideOffset, sideSize);
resultBytes[SIDE_DATA_FIELD] = (byte) (sideOffset >>> 24);
resultBytes[SIDE_DATA_FIELD+1] = (byte) (sideOffset >>> 16);
resultBytes[SIDE_DATA_FIELD+2] = (byte) (sideOffset >>> 8);
resultBytes[SIDE_DATA_FIELD+3] = (byte) (sideOffset >>> 0);
int sideType = sideData.type();
intToByte(resultBytes, SIDE_TYPE_FIELD, sideType);
int sideElements = packet.side_data_elems();
intToByte(resultBytes, SIDE_ELEMENTS_FIELD, sideElements);
long dts = packet.dts();
longToByte(resultBytes, DTS_FIELD, dts);
long pts = packet.pts();
longToByte(resultBytes, PTS_FIELD, pts);
int flags = packet.flags();
intToByte(resultBytes, FLAGS_FIELD, flags);
return resultBytes;
}
public static AVPacket toPacket(byte bytes[]) throws Exception
{
AVPacket packet = avcodec.av_packet_alloc();
int sideOffset = byteToInt(bytes, SIDE_DATA_FIELD);
int sideElements = byteToInt(bytes, SIDE_ELEMENTS_FIELD);
int sideType = byteToInt(bytes, SIDE_TYPE_FIELD);
int dataSize = sideOffset - DATA_OFFSET;
int sideSize = bytes.length - sideOffset;
long pts = byteToLong(bytes, PTS_FIELD);
long dts = byteToLong(bytes, DTS_FIELD);
int flags = byteToInt(bytes, FLAGS_FIELD);
packet.pts(pts);
packet.dts(dts);
packet.flags(flags);
Pointer newDataPointer = avutil.av_malloc(bytes.length);
BytePointer dataPointer = new BytePointer(newDataPointer);
byte dataBytes[] = new byte[dataSize];
System.arraycopy(bytes, DATA_OFFSET, dataBytes, 0, dataSize);
dataPointer.put(dataBytes);
packet.data(dataPointer);
packet.size(dataSize);
Pointer newSidePointer = avutil.av_malloc(sideSize);
BytePointer sidePointer = new BytePointer(newSidePointer);
byte sideBytes[] = new byte[sideSize];
System.arraycopy(bytes, sideOffset, sideBytes, 0, sideSize);
sidePointer.put(sideBytes);
AVPacketSideData sideData = new AVPacketSideData();
sideData.data(sidePointer);
sideData.type(sideType);
sideData.size(sideSize);
//packet.side_data(sideData);
//packet.side_data_elems(sideElements);
return packet;
}
private static void intToByte(byte[] bytes, int offset, int value)
{
bytes[offset] = (byte) (value >>> 24);
bytes[offset+1] = (byte) (value >>> 16);
bytes[offset+2] = (byte) (value >>> 8);
bytes[offset+3] = (byte) (value >>> 0);
}
private static void longToByte(byte[] bytes, int offset, long value)
{
bytes[offset] = (byte) (value >>> 56);
bytes[offset+1] = (byte) (value >>> 48);
bytes[offset+2] = (byte) (value >>> 40);
bytes[offset+3] = (byte) (value >>> 32);
bytes[offset+4] = (byte) (value >>> 24);
bytes[offset+5] = (byte) (value >>> 16);
bytes[offset+6] = (byte) (value >>> 8);
bytes[offset+7] = (byte) (value >>> 0);
}
private static int byteToInt(byte[] bytes, int offset)
{
return (bytes[offset]<<24)&0xff000000|(bytes[offset+1]<<16)&0x00ff0000|(bytes[offset+2]<<8)&0x0000ff00|(bytes[offset+3]<<0)&0x000000ff;
}
private static long byteToLong(byte[] bytes, int offset)
{
return (bytes[offset]<<56)&0xff00000000000000L|(bytes[offset+1]<<48)&0x00ff000000000000L|(bytes[offset+2]<<40)&0x0000ff0000000000L|(bytes[offset+3]<<32)&0x000000ff00000000L|(bytes[offset+4]<<24)&0x00000000ff000000L|(bytes[offset+5]<<16)&0x0000000000ff0000L|(bytes[offset+6]<<8)&0x000000000000ff00L|(bytes[offset+7]<<0)&0x00000000000000ffL;
}
}Now I have this class that works fine on the same programm, but when I send the bytes over the network I get a bad output and this error is printed to the console :
[h264 @ 00000242442acc40] Missing reference picture, default is 72646
[h264 @ 000002424089de00] Missing reference picture, default is 72646
[h264 @ 000002424089e3c0] mmco: unref short failure
[h264 @ 000002424081a580] reference picture missing during reorder
[h264 @ 000002424081a580] Missing reference picture, default is 72652
[h264 @ 000002424082c400] mmco: unref short failure
[h264 @ 000002424082c400] co located POCs unavailable
[h264 @ 000002424082c9c0] co located POCs unavailable
[h264 @ 00000242442acc40] co located POCs unavailable
[h264 @ 000002424089de00] mmco: unref short failureI think its because I dont set the sidedata field but when I try to set it the encoder crashes with the second packet.
The output looks like this :
Decoder Output -
how to solve ffmpeg video merging complain about parameters mismatching
22 septembre 2019, par mohammad rostami siahgeliI’m trying to concatenate an intro video to a main video. Here’s my command :
ffmpeg -i C:\Temp\intro.mp4 -i C:\Temp\main.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" C:\Temp\output.mp4When I run this command in cmd, I get the following error :
ffmpeg version N-95004-g2f87c9f646 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9.2.1 (GCC) 20190918
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 35.100 / 56. 35.100
libavcodec 58. 58.101 / 58. 58.101
libavformat 58. 33.100 / 58. 33.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.102 / 7. 58.102
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Temp\intro.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2019-09-21T09:23:34.000000Z
Duration: 00:00:07.32, start: 0.000000, bitrate: 706 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 960x540, 323 kb/s, 15 fps, 15 tbr, 30k tbn, 30 tbc (default)
Metadata:
creation_time : 2019-09-21T09:23:34.000000Z
handler_name : ?Mainconcept Video Media Handler
encoder : AVC Coding
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2019-09-21T09:23:34.000000Z
handler_name : #Mainconcept MP4 Sound Media Handler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Temp\main.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.40.101
Duration: 00:00:08.78, start: 0.000000, bitrate: 499 kb/s
Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x640 [SAR 1:1 DAR 1:1], 430 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 64 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 (h264) -> concat:in0:v0
Stream #0:1 (aac) -> concat:in0:a0
Stream #1:0 (h264) -> concat:in1:v0
Stream #1:1 (aac) -> concat:in1:a0
concat:out:v0 -> Stream #0:0 (libx264)
concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[Parsed_concat_0 @ 0000018168eedec0] Input link in0:v0 parameters (size 640x640, SAR 1:1) do not match the corresponding output link in0:v0 parameters (960x540, SAR 1:1)
[Parsed_concat_0 @ 0000018168eedec0] Failed to configure output pad on Parsed_concat_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #1:0
Conversion failed!I’m not a video ninja. I know parameters are different, but I have no idea after hours of search on how to solve this. A lot of online video services concatenate these two videos and give me a reasonable result. They have a GUI though. I need to do it in code, so that I can automate it.
How can I solve these errors ?
Update : This is the second error :
ffmpeg version N-95004-g2f87c9f646 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9.2.1 (GCC) 20190918
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 35.100 / 56. 35.100
libavcodec 58. 58.101 / 58. 58.101
libavformat 58. 33.100 / 58. 33.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.102 / 7. 58.102
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Temp\intro.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2019-09-21T09:23:34.000000Z
Duration: 00:00:07.32, start: 0.000000, bitrate: 706 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 960x540, 323 kb/s, 15 fps, 15 tbr, 30k tbn, 30 tbc (default)
Metadata:
creation_time : 2019-09-21T09:23:34.000000Z
handler_name : ?Mainconcept Video Media Handler
encoder : AVC Coding
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2019-09-21T09:23:34.000000Z
handler_name : #Mainconcept MP4 Sound Media Handler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Temp\main.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.40.101
Duration: 00:00:08.78, start: 0.000000, bitrate: 499 kb/s
Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x640 [SAR 1:1 DAR 1:1], 430 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 64 kb/s (default)
Metadata:
handler_name : SoundHandler
File 'C:\Temp\output.mp4' already exists. Overwrite ? [y/N] Y
Stream mapping:
Stream #0:0 (h264) -> scale
Stream #0:1 (aac) -> concat:in0:a0
Stream #1:0 (h264) -> concat:in1:v0
Stream #1:1 (aac) -> concat:in1:a0
concat:out:v0 -> Stream #0:0 (libx264)
concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[mp4 @ 000002f17869d7c0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate, a different muxer or -vsync 2
[libx264 @ 000002f178acfec0] using SAR=1/1
[libx264 @ 000002f178acfec0] MB rate (1600000000) > level limit (16711680)
[libx264 @ 000002f178acfec0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000002f178acfec0] profile High, level 6.2, 4:2:0, 8-bit
[libx264 @ 000002f178acfec0] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
More than 1000 frames duplicated
Too many packets buffered for output stream 0:0.
[libx264 @ 000002f178acfec0] frame I:1 Avg QP:16.45 size: 4679
[libx264 @ 000002f178acfec0] frame P:32 Avg QP:14.16 size: 33
[libx264 @ 000002f178acfec0] frame B:96 Avg QP:17.67 size: 30
[libx264 @ 000002f178acfec0] consecutive B-frames: 0.8% 0.0% 0.0% 99.2%
[libx264 @ 000002f178acfec0] mb I I16..4: 58.1% 34.8% 7.1%
[libx264 @ 000002f178acfec0] mb P I16..4: 0.1% 0.0% 0.0% P16..4: 0.0% 0.0% 0.0% 0.0% 0.0% skip:99.9%
[libx264 @ 000002f178acfec0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.8% 0.0% 0.0% direct: 0.0% skip:99.2% L0: 0.0% L1:100.0% BI: 0.0%
[libx264 @ 000002f178acfec0] 8x8 transform intra:33.8%
[libx264 @ 000002f178acfec0] coded y,uvDC,uvAC intra: 4.6% 8.2% 7.3% inter: 0.0% 0.0% 0.0%
[libx264 @ 000002f178acfec0] i16 v,h,dc,p: 74% 22% 5% 0%
[libx264 @ 000002f178acfec0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 1% 16% 83% 0% 0% 0% 0% 0% 0%
[libx264 @ 000002f178acfec0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 17% 26% 7% 5% 5% 5% 6% 5%
[libx264 @ 000002f178acfec0] i8c dc,h,v,p: 93% 3% 3% 1%
[libx264 @ 000002f178acfec0] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000002f178acfec0] ref P L0: 62.5% 37.5%
[libx264 @ 000002f178acfec0] ref B L1: 99.8% 0.2%
[libx264 @ 000002f178acfec0] kb/s:535069.75
Conversion failed! -
FFMPEG to create an MPEG-DASH stream with VP8
16 septembre 2019, par Kenny WordenI’m trying to use FFMPEG to stream a live video feed from my webcam
/dev/video0. Following scattered tutorials and scarce documentation (is this a known problem for the encoding community ?) I arrived at the following bash script :#!/bin/bash
ffmpeg \
-y \
-f v4l2 \
-i /dev/video0 \
-s 640x480 \
-input_format mjpeg \
-r 24 \
-map 0:0 \
-pix_fmt yuv420p \
-codec:v libvpx \
-s 640x480 \
-threads 4 \
-b:v 50k \
-tile-columns 4 \
-frame-parallel 1 \
-keyint_min 24 -g 24 \
-f webm_chunk \
-header "stream.hdr" \
-chunk_start_index 1 \
stream_%d.chk &
sleep 2
ffmpeg \
-f webm_dash_manifest -live 1 \
-i stream.hdr \
-c copy \
-map 0 \
-f webm_dash_manifest -live 1 \
-adaptation_sets "id=0,streams=0" \
-chunk_start_index 1 \
-chunk_duration_ms 1000 \
-time_shift_buffer_depth 30000 \
-minimum_update_period 60000 \
stream_manifest.mpdWhen I run this script, my webcam light turns on, the
stream.hdrandstream_manifest.mpdfiles are written, and chunks start to be created (i.e.stream_1.chk,stream_2.chk, etc...). However, FFMPEG throws the following error :Could not write header for output file #0 (incorrect codec parameters
?) : Invalid data found when processing inputI will explain what I think I am doing with this script, and hopefully this will expose any errors in my thinking.
First, we invoke FFMPEG to use Video for Linux 2 (v4l2) to read from my webcam (
/dev/video0) of a resolution 640x480. The input format ismjpegwith a framerate of 24fps.I then declare that FFMPEG should "map" (copy) the video stream output by v4l2 to a file. I specify the pixel format (YUV420P) and use libvpx (VP8 encoding) to encode the video stream. I set the size to be 640x480, use 4 threads, set the bitrate to be 50kbps, do some magic with tile-columns and frame-parallel options, and set the I-frames to be 24 frames apart.
I then create a
stream.hdrfile. The starting index is 1. This command continues to run infinitely until I kill it, grabbing new video from my webcam and outputting it into chunks.I then sleep for 2 seconds to give the previous command time to generate a header file.
And that’s really it. The next invocation of FFMPEG simply creates the MPEG-DASH manifest file given the header generated in the previous step.
So what’s going on ? Why can I not view the video in a web browser (I’m using Dash.js) ? I serve the manifest, header, and chunks on a Node.js server so that trivial issue is not the problem.
Edit : Here is my full console output.
ffmpeg version 3.0.7-0ubuntu0.16.10.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 6.2.0 (Ubuntu 6.2.0-5ubuntu12) 20161005
configuration: --prefix=/usr --extra-version=0ubuntu0.16.10.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-chromaprint --enable-libx264
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[video4linux2,v4l2 @ 0x55847e244ea0] The driver changed the time per frame from 1/24 to 1/30
[mjpeg @ 0x55847e245c00] Changing bps to 8
Input #0, video4linux2,v4l2, from '/dev/video0':
Duration: N/A, start: 64305.102081, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 640x480, -5 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Codec AVOption frame-parallel (Enable frame parallel decodability features) specified for output file #0 (stream_%d.chk) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Codec AVOption tile-columns (Number of tile columns to use, log2) specified for output file #0 (stream_%d.chk) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
[swscaler @ 0x55847e24b720] deprecated pixel format used, make sure you did set range correctly
[libvpx @ 0x55847e248a20] v1.5.0
Output #0, webm_chunk, to 'stream_%d.chk':
Metadata:
encoder : Lavf57.25.100
Stream #0:0: Video: vp8 (libvpx), yuv420p, 640x480, q=-1--1, 50 kb/s, 30 fps, 30 tbn, 30 tbc
Metadata:
encoder : Lavc57.24.102 libvpx
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> vp8 (libvpx))
Press [q] to stop, [?] for help
frame= 21 fps=0.0 q=0.0 size=N/A time=00:00:00.70 bitrate=N/A dup=5 drop=frame= 36 fps= 35 q=0.0 size=N/A time=00:00:01.20 bitrate=N/A dup=5 drop=frame= 51 fps= 33 q=0.0 size=N/A time=00:00:01.70 bitrate=N/A dup=5 drop=ffmpeg version 3.0.7-0ubuntu0.16.10.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 6.2.0 (Ubuntu 6.2.0-5ubuntu12) 20161005
configuration: --prefix=/usr --extra-version=0ubuntu0.16.10.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librubberband --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-chromaprint --enable-libx264
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, webm_dash_manifest, from 'stream.hdr':
Metadata:
encoder : Lavf57.25.100
Duration: N/A, bitrate: N/A
Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
Metadata:
webm_dash_manifest_file_name: stream.hdr
webm_dash_manifest_track_number: 1
Output #0, webm_dash_manifest, to 'stream_manifest.mpd':
Metadata:
encoder : Lavf57.25.100
Stream #0:0: Video: vp8, yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
Metadata:
webm_dash_manifest_file_name: stream.hdr
webm_dash_manifest_track_number: 1
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input
frame= 67 fps= 33 q=0.0 size
frame= 82 fps= 32 q=0.0 size=N/A time=00:00:02.73 bitrate=N/A dup=5 drop=
frame= 97 fps= 32 q=0.0 size=N/A time=00:00:03.23 bitrate=N/A dup=5 drop=
frame= 112 fps= 32 q=0.0 size=N/A time=00:00:03.73 bitrate=N/A dup=5 ...
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