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Linker command failed with exit code 1 when building ffmpeg static libraries
19 juillet 2017, par Wilsom SandersI’m trying to build ffmpeg static libraries and link them to an android project in order to implement a video player. Goal is to make a player capable of receiving video file from various sources similar to p2p file sharing networks. (target api is 21 level which is 1 level short from supposed official solution with MediaSource)
I managed to compile ffmpeg from this repo (all the code used as-is) but later i got stuck on a linking problem. Whenever I try to compile I get list of ffmpeg methods called in my code and a short eloquent message :
Linker command failed with exit code 1
I have no clue how to pass -v flag to the linker in android studio. Would be great if somebody hinted me that.
I use android studio, build with gradle and cmake.
There’s my files :
build.gradle (Project)// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}build.gradle (Module)
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
productFlavors {
x86 {
ndk {
abiFilter "x86"
}
}
arm {
ndk {
abiFilters "armeabi-v7a"
}
}
armv7 {
ndk {
abiFilters "armeabi-v7a"
}
}
}
defaultConfig {
applicationId "com.example.ledo.ndkapplication"
minSdkVersion 22
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-std=c++11 -frtti -fexceptions"
arguments '-DANDROID_PLATFORM=android-16'
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
splits {
abi {
enable true
reset()
include 'x86', 'armeabi-v7a'
universalApk true
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:25.3.1'
compile 'com.writingminds:FFmpegAndroid:0.3.2'
testCompile 'junit:junit:4.12'
}CMakeLists.txt
# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 2.8)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/native-lib.cpp
src/main/cpp/NativePlayer.h
src/main/cpp/NativePlayer.cpp)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log )
find_library(png-lib png)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.
#avcodec
#avfilter
#avformat
#avutil
#swresample
#swscale
#${ANDROID_ABI}
message(${ANDROID_ABI})
set(FFMPEG_ROOT_DIR src/main/libs/ffmpeg/${ANDROID_ABI})
add_library(avcodec STATIC IMPORTED)
add_library(avformat STATIC IMPORTED)
add_library(avfilter STATIC IMPORTED)
add_library(avutil STATIC IMPORTED)
add_library(swresample STATIC IMPORTED)
add_library(swscale STATIC IMPORTED)
#SET_TARGET_PROPERTIES(avcodec PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavcodec.a)
#SET_TARGET_PROPERTIES(avfilter PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavfilter.a)
#SET_TARGET_PROPERTIES(avformat PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavformat.a)
#SET_TARGET_PROPERTIES(avutil PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavutil.a)
#SET_TARGET_PROPERTIES(swresample PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswresample.a)
#SET_TARGET_PROPERTIES(swscale PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswscale.a)
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/include )
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib )
target_link_libraries( # Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib}
avcodec
avformat
#avfilter
#swresample
#swscale
#avutil
GLESv2)I have .a files in following locations :
%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a-neon%PROJECT_DIR%/app/src/libs/ffmpeg/x86
It doesn’t look to me that linker misses files themselves. (I get different out put if I misplace them.)
-
Android ffmpeg. Linker command failed with exit code 1
8 juin 2017, par Wilsom SandersI’m trying to build ffmpeg static libraries and link them to an android project in order to implement a video player. Goal is to make a player capable of receiving video file from various sources similar to p2p file sharing networks. (target api is 21 level which is 1 level short from supposed official solution with MediaSource)
I managed to compile ffmpeg from this repo (all the code used as-is) but later i got stuck on a linking problem. Whenever I try to compile I get list of ffmpeg methods called in my code and a short eloquent message :
Linker command failed with exit code 1
I have no clue how to pass -v flag to the linker in android studio. Would be great if somebody hinted me that.
I use android studio, build with gradle and cmake.
There’s my files :
build.gradle (Project)// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.3.1'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}build.gradle (Module)
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
productFlavors {
x86 {
ndk {
abiFilter "x86"
}
}
arm {
ndk {
abiFilters "armeabi-v7a"
}
}
armv7 {
ndk {
abiFilters "armeabi-v7a"
}
}
}
defaultConfig {
applicationId "com.example.ledo.ndkapplication"
minSdkVersion 22
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-std=c++11 -frtti -fexceptions"
arguments '-DANDROID_PLATFORM=android-16'
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
splits {
abi {
enable true
reset()
include 'x86', 'armeabi-v7a'
universalApk true
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'com.android.support:design:25.3.1'
compile 'com.writingminds:FFmpegAndroid:0.3.2'
testCompile 'junit:junit:4.12'
}CMakeLists.txt
# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 2.8)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/native-lib.cpp
src/main/cpp/NativePlayer.h
src/main/cpp/NativePlayer.cpp)
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log )
find_library(png-lib png)
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.
#avcodec
#avfilter
#avformat
#avutil
#swresample
#swscale
#${ANDROID_ABI}
message(${ANDROID_ABI})
set(FFMPEG_ROOT_DIR src/main/libs/ffmpeg/${ANDROID_ABI})
add_library(avcodec STATIC IMPORTED)
add_library(avformat STATIC IMPORTED)
add_library(avfilter STATIC IMPORTED)
add_library(avutil STATIC IMPORTED)
add_library(swresample STATIC IMPORTED)
add_library(swscale STATIC IMPORTED)
#SET_TARGET_PROPERTIES(avcodec PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avcodec PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavcodec.a)
#SET_TARGET_PROPERTIES(avfilter PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avfilter PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavfilter.a)
#SET_TARGET_PROPERTIES(avformat PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avformat PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavformat.a)
#SET_TARGET_PROPERTIES(avutil PROPERTIES LINKER_LANGUAGE C)
set_target_properties(avutil PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libavutil.a)
#SET_TARGET_PROPERTIES(swresample PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swresample PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswresample.a)
#SET_TARGET_PROPERTIES(swscale PROPERTIES LINKER_LANGUAGE C)
set_target_properties(swscale PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib/libswscale.a)
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/include )
include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/${FFMPEG_ROOT_DIR}/lib )
target_link_libraries( # Specifies the target library.
native-lib
# Links the target library to the log library
# included in the NDK.
${log-lib}
avcodec
avformat
#avfilter
#swresample
#swscale
#avutil
GLESv2)I have .a files in following locations :
%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a
%PROJECT_DIR%/app/src/libs/ffmpeg/armeabi-v7a-neon
%PROJECT_DIR%/app/src/libs/ffmpeg/x86It doesn’t look to me that linker misses files themselves. (I get different out put if I misplace them.)
-
ffmpeg Command in Docker with Rust Tokio Closes Warp Server Connection (curl 52 Error)
3 juin 2024, par user762345I’m encountering an issue where executing an ffmpeg concatenation command through Rust’s Tokio process in a Docker container causes subsequent HTTP requests to fail. The error occurs exclusively after running the ffmpeg command and making immediate requests, resulting in a “curl 52 empty response from server” error with the connection being closed. Notably, this issue does not occur when running the same setup outside of Docker. Additionally, if no HTTP requests are made after the ffmpeg command, the curl 52 error does not occur.


Here is the verbose curl output of my minimum reproducible example (see below).


curl -v "http://localhost:3030"
* Trying 127.0.0.1:3030...
* Connected to localhost (127.0.0.1) port 3030 (#0)
> GET / HTTP/1.1
> Host: localhost:3030
> User-Agent: curl/8.1.2
> Accept: */*
> 
* Empty reply from server
* Closing connection 0
curl: (52) Empty reply from server


Here are Docker logs from my minimum reproducible example (see below). The wav files are concatenated successfully, then the container appears to rebuild.


[2024-06-03T05:26:58Z INFO minimal_docker_webserver_post_error] Starting server on 0.0.0.0:3030
[2024-06-03T05:26:58Z INFO warp::server] Server::run; addr=0.0.0.0:3030
[2024-06-03T05:26:58Z INFO warp::server] listening on http://0.0.0.0:3030
[2024-06-03T05:27:07Z INFO minimal_docker_webserver_post_error] WAV files concatenated successfully
[Running 'cargo run']
 Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
 Running `target/debug/minimal_docker_webserver_post_error`
[2024-06-03T05:27:08Z INFO minimal_docker_webserver_post_error] Starting server on 0.0.0.0:3030
[2024-06-03T05:27:08Z INFO warp::server] Server::run; addr=0.0.0.0:3030
[2024-06-03T05:27:08Z INFO warp::server] listening on http://0.0.0.0:3030


What I have tried :
I tried using different web frameworks (Warp, Actix-web) and request crates (reqwest, ureq). I also tried running the setup outside of Docker, which worked as expected without any issues. Additionally, I tried running the setup in Docker without making any HTTP requests after the ffmpeg command, and the connection closed successfully without errors. I also tried posting to httpbin with a minimal request, but the issue persisted.


Minimum reproducible example :


main.rs


use warp::Filter;
use reqwest::Client;
use std::convert::Infallible;
use log::{info, error};
use env_logger;
use tokio::process::Command;

#[tokio::main]
async fn main() {
 std::env::set_var("RUST_LOG", "debug");
 env_logger::init();

 let route = warp::path::end()
 .and_then(handle_request);

 info!("Starting server on 0.0.0.0:3030");
 warp::serve(route)
 .run(([0, 0, 0, 0], 3030))
 .await;
}

async fn handle_request() -> Result<impl infallible="infallible"> {
 let client = Client::new();

 let output = Command::new("ffmpeg")
 .args(&[
 "y",
 "-i", "concat:/usr/src/minimal_docker_webserver_post_error/file1.wav|/usr/src/minimal_docker_webserver_post_error/file2.wav",
 "-c", "copy",
 "/usr/src/minimal_docker_webserver_post_error/combined.wav"
 ])
 .output()
 .await;

 match output {
 Ok(output) => {
 if output.status.success() {
 info!("WAV files concatenated successfully");
 } else {
 error!("Failed to concatenate WAV files: {:?}", output);
 return Ok(warp::reply::with_status("Failed to concatenate WAV files", warp::http::StatusCode::INTERNAL_SERVER_ERROR));
 }
 },
 Err(e) => {
 error!("Failed to execute ffmpeg: {:?}", e);
 return Ok(warp::reply::with_status("Failed to execute ffmpeg", warp::http::StatusCode::INTERNAL_SERVER_ERROR));
 }
 }

 // ISSUE: Connection closes with curl: (52) Empty reply from server
 match client.get("https://httpbin.org/get").send().await {
 Ok(response) => info!("GET request successful: {:?}", response),
 Err(e) => error!("GET request failed: {:?}", e),
 }

 match client.post("https://httpbin.org/post")
 .body("field1=value1&field2=value2")
 .send().await {
 Ok(response) => info!("POST request successful: {:?}", response),
 Err(e) => error!("POST request failed: {:?}", e),
 }

 Ok(warp::reply::with_status("Request handled", warp::http::StatusCode::OK))
}
</impl>

FFMPEG command to generate the two wav files for concatenation


ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" file1.wav && ffmpeg -f lavfi -i "sine=frequency=500:duration=5" file2.wav


Dockerfile


# Use the official Rust image as the base image
FROM rust:latest

# Install cargo-watch
RUN cargo install cargo-watch

# Install ffmpeg
RUN apt-get update && apt-get install -y ffmpeg

# Set the working directory inside the container
WORKDIR /usr/src/minimal_docker_webserver_post_error

# Copy the Cargo.toml and Cargo.lock files
COPY Cargo.toml Cargo.lock ./

# Copy the source code
COPY src ./src

# Copy wav files
COPY file1.wav /usr/src/minimal_docker_webserver_post_error/file1.wav
COPY file2.wav /usr/src/minimal_docker_webserver_post_error/file2.wav

# Install dependencies
RUN cargo build --release

# Expose the port that the application will run on
EXPOSE 3030

# Set the entry point to use cargo-watch
CMD ["cargo", "watch", "-x", "run"]


Cargo.toml


[package]
name = "minimal_docker_webserver_post_error"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
warp = "0.3"
reqwest = { version = "0.12.4", features = ["json"] }
tokio = { version = "1", features = ["full"] }
log = "0.4"
env_logger = "0.11.3"


Making the request to the warp server


curl -v "http://localhost:3030"


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